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2019

AAPM Presentations:  
 
IROC Houston QA Center's International Anthropomorphic Phantom Activity
Andrea Molineu, Paola Alvarez, Paige Taylor, Jessica Lowenstein, Stephen Kry, David Followill
 
The magnitude of dose calculation errors as a component of the IROC lung and spine phantom failures
Sharbacha S. Edward, Mallory C. Glenn, Christine B. Peterson, Peter A. Balter, Rebecca M. Howell, Julianne M. Pollard-Larkin, David S. Followill,Stephen F. Kry
 
Differences in patterns of failure between the Imaging and Radiation Oncology Core (IROC Houston) Lung and Spine phantoms
Sharbacha S. Edward, Paola E. Alvarez, Paige A. Taylor, H. Andrea Molineu, David S. Followill, Stephen F. Kry
 
AAPM Posters:  
 
IROC Radiation Therapy QA Centers: 5 Years of Support of the NCI’s NCTN Clinical Trials
D Followill*, Y Xiao, J Michalski, and T FitzGerald
 
Results of IROC Anthropomorphic Liver Phantom Irradiations with Protons and Photons
P. Taylor, P. Alvarez, H. Mehrens, and D. Followill
 
Criteria for the evaluation of the percentage depth dose for electron beam based on OSLD measurements
P. Alvarez, P. Taylor, J. Leif, A. Molineu, S. Kryand D. Followill
 

2018

AAPM Presentations:  
 
The 50thAnniversary of the Radiological Physics Center (RPC)/IROC Houston QA Center Activities and Findings
D Followill
 
Using Scientific Thought to Avoid Mistakes
D Followill
 
Treatment Planning System Beam Modeling Parameters Exhibit High Variation Among Radiotherapy Institutions
Mallory Carson Glenn, BS
 
Evaluation Criteria for IROC’s Proton Prostate Phantom
Paige Taylor, M.S.
 
 
AAPM Posters:  
 
IGRT Credentialing for NCI Sponsored Clinical Trials
A Molineu, P Chi, J Lowenstein, D Followill
 
Imaging and Radiation Oncology Core (IROC) Houston QA Center’s Credentialing Letters for Randomized Photon vs Proton NCI Trials
H Mehrens, B Lewis, T Nguyen, N. Pajot, N Hernandez, P. Taylor, A Molineu, D Followill
 
Evaluation of Proton Therapy Dose Calculations in a Simple Geometrical Static Lung Phantom
Daniela Branco, Paige Taylor, Stephen Kry, Dragan Mirkovic, David Followill
 
A Pilot Study of IROC’s Proton Head & Neck Phantom
Paige A. Taylor, Daniela Branco, Nadia Hernandez, & David S. Followill
 

2017

AAPM Presentations:  
 
IROC Houston QA Center End-to-End QA phantom Program Key Findings Over the Past 15 Years
D Followill, A Molineu, P Alvarez, J Lowenstein, P Taylor, N Hernandez, T Nguyen, H Mehrens, B Lewis, S Kry
 
Dose to Water vs. Muscle: Rationale
S Kry
 
Assessing the Risk of CIED Malfunction from Radiation
S Kry
 
An Update On the Dosimetric Accuracy of Different Treatment Planning System Algorithms in the IROC Lung Phantom
S Kry, A Molineu, P Alvarez, D Followill
 
IROC-Houston's Pediatric TBI Phantom Credentialing Program
A Molineu, H Mehrens, D Followill
 
Clinical Trial Credentialing: Where to Start and Resources Available
A Molineu
 
Monte Carlo Shows Large Improvement Over Analytic Algorithms in Calculating Proton Therapy Dose to Thoracic Tumors in IROC Lung Phantom
P Taylor, S Kry, D Followill
 
AAPM Posters:  
 
IROC Houston QA Center S Independent Peer Review Quality Assurance Program for the Veteran Affairs VA Radiotherapy Facilities
P Alvarez, A Molineu, J Lowenstein, P Taylor, S Kry, D Followill
 
What Is the IROC Roster?
J Lowenstein, P Holguin, D Followill
 
IROC-Houston's New Automated Process for Issuing Credentialing Letters
H Mehrens, N Hernandez, B Lewis, T Nguyen, A Molineu, D Followill
 
 

2016

AAPM Presentations:  
 
Examining Credentialing Criteria and Poor Performance Indicators for IROC Houston’s Anthropomorphic Head and Neck Phantom
M Carson, A Molineu, P Taylor, D Followill, S Kry
 
Measurement and Calibration Discrepancy: Advanced Warning Guidance
D Followill
 
Lessons Learned from IROC Houston Audits
D Followill
 
Identifying Treatment Planning System errors through IROC-H Head & Neck phantom irradiations
J Kerns, D Followill, R Howell, A Melancon, F Stingo, S Kry
 
TG 191: The Clinical Use of Luminescent Dosimeters
S Kry
 
AAPM Posters:  
Independent Remote Audits for TG-51 Non-Compliant Photon Beams Performed by the IROC Houston QA Center
P Alvarez, A Molineu, J Lowenstein, P Taylor, S Kry, D Followill
 
Development and Implementation of an Anthopomorphic Head and Neck Phantom for the Assessment of Proton Therapy Treatment Procedures
D Branco, P Taylor, X Zhang, H Li, M Guidani, H Mehrens, D Followill
 
The Imaging and Radiation Oncology Core (IROC) Cooperative’s Activities Supporting the NCI’s National Clinical Trial Network
D Followill, J Galvin, J Michalski, M Rosen, T Fitzgerald, M Knopp
 
IGRT Credentialing in NCTN Trials
J Lowenstein, A Molineu, H Al-Hallaq, M Matuszak, T Craig, K Ulin, Y Xiao, F Yin, D Followill
 
Imaging and Radiation Oncology Core (IROC) Houston QA Center’s Anthropomorphic Phantom Statistics
H Mehrens, B Lewis, C Lujano, T Nguyen, N Hernandez, P Alvarez, A Molineu, D Followill
 
IROC Houston and MDAPL SRS Anthropomorphic Phantom Results
A Molineu, S Kry, P Alvarez, N Hernandez, T Nguyen, D Followill
 
Proton Therapy Tissue-Equivalence of 3D Printed Materials
P Taylor, D Craft, D Followill, R Howell
 
 

2015

AAPM Presentations:  
 
An Evaluation of Out-Of-Field Doses for Electron Beams From Modern Varian and Elekta Linear Accelerators
C Cardenas, P Nitsch, R Kudchadker, R Howell, S Kry
 
A Phantom Study to Assess the Variability in Radiomics Features Extracted From Cone-Beam CT Images
X Fave, D Fried, L Zhang, J Yang, P Balter, D Followill, D Gomez , A Jones, F Stingo, L Court
 
The Imaging and Radiation Oncology Core (IROC) Houston QA Center’s International Activities Outside North America
D Followill, S Kry, A Molineu, J Lowenstein, P Alvarez, P Taylor, H Nguyen, N Hernandez, C Lujano, T Nguyen, T Keith, J Roll, A Tailor
 
SBRT Credentialing: Understanding the Process From Inquiry to Approval
D Followill
 
Pseudo In Vivo Patient Dosimetry Using a 3D-Printed Patient-Specific Phantom
R Ger1, EA Burgett, RR Price, DF Craft, SF Kry, RM Howell
 
Common Errors and Deficiencies in Radiation Oncology Practice
S Kry, L Dromgoole, P Alvarez, J Lowenstein, A Molineu, P Taylor, D Followill
 
IROC Houston On-Site Audits and Parameters That Affect Performance
S Kry, L Dromgoole, P Alvarez, J Lowenstein, A Molineu, P Taylor, D Followill
 
Overview of Non-Target Doses, Concerns, and Summary of Recommendations
S Kry
 
Results From Multi-Institutional Measurements with An Anthropomorphic Spine Phantom
A Molineu, N Hernandez, P Alvarez, D Followill
 
A Comparison of CT Number to Relative Linear Stopping Power Conversion Curves Used by Proton Therapy Centers
P Taylor, J Lowenstein, S Kry, G Ibbott, D Followill
 
IROC Houston's Proton Beam Validation for Clinical Trials
P Taylor
 
AAPM Posters:  
An Evaluation of Multiple Irradiations of the IROC Houston QA Center Anthropomorphic Liver Phantom
P Alvarez, A Molineu, C Lujano, T Nguyen, D Followill
 
Volume-Dependence of Quantitative Imaging Features From CT and CE-CT Images of NSCLC
X Fave, D Fried, L Zhang, J Yang, P Balter, D Followill, D Gomez , A Jones, F Stingo, L Court
 
Dosimetric Impact of Implementing Metal Artifact Reduction Methods and Metal Energy Deposition Kernels for Photon Dose Calculations
J Huang, D Followill, R Howell, X Liu, D Mirkovic, F Stingo, S Kry
 
Validation of a Secondary TPS for IROC-H Recalculation of Anthropomorphic Phantoms
J Kerns, R Howell, D Followill, A Melancon, F Stingo, S Kry
 
An Analysis of TG-51 Electron Beam Calibration Correction Factor Uncertainty
P Lee, P Alvarez, P Taylor, J Lowenstein, A Molineu, S Kry, D Followill
 
IROC Houston QA Center's Anthropomorphic Proton Phantom Program
C Lujano, N Hernandez, T Keith, T Nguyen, P Taylor, A Molineu, D Followill
 
Benchmarks and Pre-Treatment Reviews: A Study of Quality Assurance Effectiveness
J Lowenstein, H Nguyen, J Roll, A Walsh, A Tailor, D Followill
 
Uncertainties in Treatment Planning for IROC-Houston Proton Phantom QA Program Due to Variable CT Technique and Proton Energy
M McInnis, P Taylor, F Poenisch, L Court, M Guindani, D Followill
 
An FMEA Survey of Intensity Modulated Radiation Therapy (IMRT) Step and Shoot Dose Delivery Failure Modes
J Tonigan Faught, J Johnson, F Stingo, S Kry, L Court, P Balter, D Followill
 
Clinical Impact of IMRT Failure Modes at Or Near TG-142 Tolerance Criteria Levels
J Tonigan Faught, P Balter, J Johnson, S Kry, L Court, F Stingo, D Followill
 
Characterizing Tissue Equivalent Materials for the Development of a Dual MRI-CT Heterogeneous Anthropomorphic Phantom Designed Specifically for MRI Guided Radiotherapy Systems
A Steinmann, R Stafford, J Yung, D Followill
 
Characterization of the New Xoft Axxent Electronic Brachytherapy Source Using PRESAGE Dosimeters
A Steinmann, J Adamovics, D Followill, G Ibbott
 
SWAAPM Posters:  
 
An Evaluation of Out-of-Field Doses for Electron Beam Applicators on Varian and Elekta Linear Accelerators
C Cardenas, P Nitsch, R Kudchadker, R Howell, S Kry
 

2014

ASTRO Presentations:
 
IROC: Imaging and Radiation Oncology Core
David Followill
 
ASTRO Posters:  
The Credentialing Process for the NSABP B-51/RTOG 1304 Phase III Randomized Clinical Trial
Jessica Lowenstein, Hannah Nguyen, Ashley Hollan, James Galvin, David Followill, Darlene Kiniry, Thomas Julian, Eleftherios Mamounas, Julia White, Atif Kahn, Simona Shaitelman, Mylin Torres, Frank Vicini, Norman Wolmark, Walter Curran
 
Compilation of Proton Therapy Data from the Approval Process for NCI-funded Clinical Trials
Paige Summers, Geoffrey Ibbott, Paola Alvarez, Michael Moyers, Ryan Lafratta, David Followill
 
AAPM Presentations:  
 
The Radiological Physics Center (RPC): 45 Years of Improving Radiotherapy Dosimetry
David Followill, Jessica Lowenstein, Andrea Molineu, Paola Alvarez, Paige Summers, Stephen Kry
 
Imaging and Radiation Oncology Core Cooperative: QA Center Organization and Core Services
David Followill
 
An Evaluation of Three Commercial Metal Artifact Reduction Methods for CT Simulations in Radiation Therapy Treatment Planning
Jessie Huang, James Kerns, Jessica Nute, X. Liu, David Followill, Dragan Mirkovic, Rebecca Howell, Stephen Kry
 
Stop Lecturing Me! New Methods for Teaching Medical Physics
Stephen Kry
 
Uncertainty Analysis for Dose Measurements Using OSLD NanoDots
Stephen Kry, Paola Alvarez, Francesco Stingo, David Followill
 
A Survey of Current IMRT QA Practices
Kiley Pulliam, James Kerns, Rebecca Howell, David Followill, Jennifer O’Daniel, Stephen Kry
 
AAPM Posters:  
 
Evaluation of the microSTAR reader for the OSLD system for the remote dosimetry audits at the IROC HQAC
P. Alvarez, S. Gonzalez, L. McDonald, D. Followill
 
Imaging and Radiation Oncology Core (IROC) Houston QA Center (RPC) Credentialing
Carrie F. Amador, Tyler Keith, Trang Nguyen, Andrea Molineu, David Followill
 
Development and Implementation of an Anthropomorphic Pediatric Spine Phantom for the Assessment of Craniospinal Irradiation Procedures in Proton Therapy
Dana J. Lewis, Paige A. Summers, David S. Followill, Narayan Sahoo, Anita Mahajan, Francesco C. Stingo, Stephen F. Kry
 
Development of an independent, Monte Carlo, dose calculation, quality assurance tool for clinical trials
Austin M. Faught, Scott E. Davidson, Jonas Fontenot, Stephen F. Kry, Carol Etzel, Geoffrey S. Ibbott, David S. Followill
 
Technical Aspects of Credentialing for the NSABP B-51 / RTOG 1304 Trial
Jessica R. Lowenstein, Hannah Nguyen, Ashley Hollan, James Galvin, David S. Followill
 
Preliminary 2D and 3D Gamma calculation comparison using PRESAGE®
Ryan Lafratta, James Yang, Narayan Sahoo, Susan Tucker, David Followill, Geoffrey Ibbott
 
Is it feasible to tighten the criteria for IROC’s anthropomorphic phantoms?
A. Molineu, P. Alvarez, S. Kry, and D. Followill
 
Validation of the Use of OSLD for Carbon Beam Remote Dosimetry
P Summers, J Lowenstein, O Jakel, H Prokesch, P Alvarez, D Followill
 
FMEA severity scores: do we really know?
Jacqueline Tonigan, Jennifer Lynn Johnson, Stephen Kry, Peter Balter, Laurence Edward Court, Francesco Stingo, David Followill
 
 
 

2013

ASTRO Posters
 
Common Errors Found in Low Dose Rate(LDR) Prostate Credentialing
 
AAPM Presentations
 
Level of Accuracy Practically Achievable in Radiation Therapy
David Followill and RPC staff
 
The Imaging and Radiation Oncology Core (IROC) Group: A Proposed New Clinical Trial Quality Assurance Organization
David Followill
 
Design and verification of a heterogeneous proton equivalent thorax phantom for use in end-to-end assessment of pencil beam proton therapy
J Neihart, N Sahoo, P Balter, P Summers, M Palmer, M Kerr, D Followill
 
An Independent Audit and Analysis of Small Field Dosimetry Quality Assurance
David Followill and RPC staff
 
Radiological Physics Center (RPC) Approval of Proton Centers for NCI-Sponsored Clinical Trials
Paige Summers
 
AAPM Posters:  
 
Characterization of Optically Stimulated Luminescence Dosimeters for Use in Small Photon Beam Dosimetry
Christopher Pham, Paola Alvarez, Stephen Kry, Peter Balter, Francesco Stingo, David Followill
 
Development of an independent, Monte Carlo, dose calculation, quality assurance tool for clinical trials
Austin M. Faught, Scott E. Davidson, Jonas Fontenot, Stephen F. Kry, Carol Etzel, Geoffrey S. Ibbott, and David S. Followill
 
Dosimetric impact of implementing kernel hardening and material-specific kernels in the convolution/superposition method
Jessie Huang, David Eklund, Nathan Childress, Rebecca Howell, Dragan Mirkovic, and Stephen Kry
 
Initial Results from Multiple Irradiations of an Anthropomorphic Liver Phantom
Andrea Molineu, Paola Alvarez, Carrie Amador, Tim Craig, Mike Gillin, David S. Followill
 
The Value of Rapid Reviews
Jessica R. Lowenstein, Joye Roll, Ashley Hollan, Hannah Nguyen and David Followill
 
Results of irradiations performed on Radiological Physics Center’s anthropomorphic lung phantom and respiratory simulating motion table
Paola Alvarez, Andrea Molineu, Carrie Amador, Trang Nguyen, David S. Followill
 
Investigation of 3D dosimetry for proton therapy using PRESAGE
Mitchell Carroll, G. Ibbott, M. Gillin, J. Adamovics
 
Towards Optimizing Patient Specific IMRT QA Techniques in the Accurate Detection of Acceptable and Unacceptable Plans
Elizabeth McKenzie, Peter Balter, Jimmy Jones, David Followill, Francesco Stingo, Kiley Pulliam, Stephen Kry
 
Reproducibility in the Field of Patient Specific IMRT QA
Elizabeth McKenzie, Peter Balter, Jimmy Jones, David Followill , Francesco Stingo, Stephen Kry
 
IMRT severity scoring for TG-100: Do you really know?
Jacqueline Tonigan, Stephen Kry, Peter Balter, Austin Faught, David Followill
 
 

2012

AAPM Posters:  
 
Radiological Physics Center
David S. Followill
 
Evaluation of the Effectiveness of Analytical Anisotropic Algorithm in Flattened and Flattening-Filter-Free Beams for High Energy Dose Delivery Using the Radiological Physics Center Lung Phantom
R Repchak, A Molineu, R Popple, S Kry, R Howell, D Followill
 
Evaluation of AcurosXB deterministic algorithm for heterogeneous dose calculation in lung cancer with RPC thorax phantom
Tao Han, Firas Mourtada, Roman Repchak, Jacqueline Tonigan, Justin Mikell, Rebecca Howell, Mohammad Salehpour, Andrea Molineu, and David Followill
 
The Radiological Physics Center’s Credentialing Dosimetry Reviews: Their Effect on Clinical Trial Deviation Rates
Ashley Hollan, Jessica Lowenstein, Hannah Nguyen, Franklin Hall, Irene Harris, Joye Roll, and David Followill
 
Evaluation of the characteristics of TLD LiF:Mg.Ti-100 Powder: A Measure of Consistency Between Multiple Batches of Powder
Paola Alvarez,Jose Francisco Aguirre, Susan Smith, David Followill
 
The Radiological Physics Center’s Anthropomorphic Quality Assurance Phantom Program
Carrie F. Amador, Nadia Hernandez, Andrea Molineu, Paola Alvarez, and David Followill
 
Design, development, and evaluation of a modified, anthropomorphic, head and neck, quality assurance phantom for use in stereotactic radiosurgery
Austin M. Faught, Stephen F. Kry, Dershan Luo, Andrea Molineu, Jim Galvin, Robert Drzymala, Robert Timmerman, Jason Sheehan, David Bellezza, Russell Gerber, Scott Davidson, Michael T. Gillin, Geoffrey S. Ibbott, and David S. Followill
 
Development and Implementation of a Remote Audit Tool for High Dose Rate (HDR) 192Ir Brachytherapy Using Optically Stimulated Luminescence Dosimetry
Kevin Casey, Paola Alvarez, Ann Lawyer, Stephen Kry, Rebecca Howell, Scott Davidson, David Followill
 
Investigation of 3D Dosimetry for an Anthropomorphic Spine Phantom
R. Grant, G. Ibbott, J. Yang, J. Adamovics, D Followill
 
Three-Dimensional Measurements of Dose and LET from a Proton Beam via Polymer Gel Dosimetry
K Vredevoogd, G Ibbott, M Gillin, N Sahoo, S Kry, K Gifford, M Maryanski
 
Investigation of photon and proton overlapping fields in PRESAGE® dosimeters
Mitchell Carroll, G. Ibbott, R. Grant, M. Gillin, J. Adamovics
 
The magnitude of H&N IMRT dose delivery errors from three possible failure modes: beam quality, symmetry, and MLC position
Jackie Tonigan, David Followill
 
Comparison on Proton Therapy Institutional Data
Paige Summers
 
An Analysis of More Than 13,000 Patient-Specific IMRT QA Results
K. Pulliam, D Followill, L Court, L Dong, M Gillin, K Prado, S Kry
 
The RPC Proton Therapy Approval Process
Paige Summers
 
Development and Implementation of the use of Optically Stimulated Luminescent Detectors in the Radiological Physics Center Anthropomorphic Quality Assurance Phantoms
Jennelle Bergene, Stephen Kry, Andrea Molineu, David Bellezza, Laurence Court, Valen Johnson, David Followill
 
The effects of image resolution and noise on the gamma dose distribution comparison method
Jessie Huang, Kiley Pulliam, David Followill, and Stephen Kry
 
Calculation of high-resolution and spatially variant photon energy deposition kernels
Jessie Huang, Nathan Childress, and Stephen Kry
 
Ion Recombination Correction Factors (Pion) for Varian TrueBeam High Dose Rate Therapy Beams
Stephen F. Kry, Richard Popple, Andrea Molineu, David S. Followill
 
High-Energy Photon Standard Dosimetry Data: A Quality Assurance Tool
Jessica R. Lowenstein, Stephen F. Kry, Andrea Molineu, Paola Alvarez, J. Francisco Aguirre, Paige Summer and David Followill
 
2D vs 3D Gamma Analysis: Establishment of Comparable Clinical Action Limits
Kiley Pulliam, Ryan Bosca, David Followill, Jennifer O’Daniel, Stephen Kry
 
Credentialing Results from the RPC’s Spine Anthropomorphic Phantom
Andrea Molineu, Paola Alvarez,Nadia Hernandez, Fang-Fang Yin,and David Followill
 
Investigation of a Commercial OSLD System for CT Dosimetry
S Scarboro, D Cody, D Followill, P Alvarez,M McNitt-Gray, D Zhang, L Court, S Kry
 
Radiation Related Second Cancers
Stephen F. Kry
 
Obtaining Elemental Tissue Composition of Proton Therapy Patients using PET : A Pilot Study
Jongmin Cho, Geoffrey Ibbott, Michale Gillin, Carlos Gonzalez-Lepera and Osama Mawlawi
 
Algorithms used in heterogeneous dose calculations show systematic error as measured with the Radiological Physics Center’s anthropomorphic thorax phantom used for RTOG credentialing
Stephen Kry, Paola Alvarez, Andrea Molineu, Carrie Amador, James Galvin, & David Followill
 
Comparison of Clinical Parameters for Proton Therapy in the United States
Paige Summers, Geoff Ibbott, Michael Moyers, Ryan Grant, & David Followill
 
Radiological Physics Center
Ashley Hollan
 
 
 

2011

AAPM Posters:  
 
Analysis of Uncertainties for the RPC Remote Dosimetry Using Optically Stimulated Light Dosimetry (OSLD)
J. Francisco Aguirre, Paola Alvarez, David S. Followill, Geoffrey S. Ibbott
 
Analysis of results from an anthropomorphic stereotactic radiosurgery phantom
Carrie F. Amador, Andrea Molineu, Susan A. Smith, Nadia Hernandez, David Followill and Marilyn Stovall
 
Design, development, and evaluation of a modified, anthropomorphic, head and neck, quality assurance phantom for use in stereotactic radiosurgery
Austin M. Faught, Stephen F. Kry, Dershan Luo, Andrea Molineu, Jim Galvin, Robert Drzymala, Robert Timmerman, Jason Sheehan, Michael T. Gillin, Geoffrey S. Ibbott, and David S. Followill
 
Requirements for performing a retrospective patient chart review at the RPC for clinical trials
Ashley Hollan, Jessica Lowenstein, Franklin Hall, Irene Harris, Joye Roll, and David Followill
 
The effect of shoulder variation on IMRT and SmartArc for head and neck cancer
EMILY NEUBAUER, LEI DONG, PH.D., DAVID FOLLOWILL, PH.D., ADAM S. GARDEN, M.D., LAURENCE COURT, PH.D., R. ALLEN WHITE, PH.D., AND STEPHEN F. KRY, PH.D.
 
Development of an anthropomorphic head phantom for the assessment of proton therapy treatment procedures
Paige Summers, David Followill, Narayan Sahoo, Falk Pönisch, Susan Tucker, Michael Gillin, Beverly Riley, & Geoffrey Ibbott
 
Evaluation of the OSLD system for remote dosimetry audits implemented by the RPC
P. Alvarez, J.F. Aguirre, D. Followill
 
Proton Linearity and Energy Dependence of Optically Stimulated Luminescent Detectors for Remote Audits of Proton Beam Calibration by the Radiologial Physics Center
Jongmin Cho, Paola Alvarez, Geoffrey Ibbott, Michael Gillin, and David Followill
 
Evaluation of Lung Treatment Deliveries Using the Radiological Physics Center’s (RPC) Thorax Phantom: Monte Carlo vs. All Other Modern Heterogeneity Correction Algorithms.
D. Followill, P. Alvarez, M. Gillin and G. Ibbott
 
Cervix Brachytherapy Dosimetry: Inconsistencies in Defining Bladder and Rectal Points
Jessica R. Lowenstein, Joye Roll, Irene Harris, Franklin Hall, Ashley Hollan and David Followill
 
Clinical Impact of the Couch Top and Rails on IMRT and Arc Therapy
Kiley Pulliam, Rebecca Howell PhD, David Followill PhD, Dershan Lou PhD, R. Allen White PhD, Stephen Kry, PhD
 
Results from 1069 IMRT irradiations of an anthropomorphic head and neck phantom
Andrea Molineu, Nadia Hernandez, Paola Alvarez, Geoffrey Ibbott, Jim Galvin and David Followill
 
 
 

2010

AAPM Presentations
 
MO-A-BRA-1
Credentialing for Clinical Trials
Geoffrey S. Ibbott, Ph.D.
 
WE-D-204C-1
Opportunities and Considerations for Multi-institutional Clinical Trials Research
Geoffrey S. Ibbott, Ph.D.
 
SU-GG-T-476
Effect of Film Orientation On Proton Beam Dosimetry
Ryan Grant, Geoffrey S. Ibbott, Beverly Riley, Narayan Sahoo, Susan Tucker, X. Ronald Zhu, David Followill
 
SU-GG-T-552
Commissioning An Anthropomorphic Spine and Lung Phantom for Remote Quality Assurance of Spinal Radiosurgery
Douglas Caruthers, M.S.; Geoffrey Ibbott, Ph.D.; David Followill, Ph.D.; Eric Chang, M.D.; Almon Shiu, Ph.D.; Allen White, Ph.D.
 
Validation of the Commissioning of an OSLD System for Remote Dosimetry
F. Aguirre, P. Alvarez, C. Amador, A. Tailor, D. Followill, G. Ibbott
 
Initial Results from Multiple Irradiations of an Anthropomorphic Spine Phantom
Andrea Molineu, Nadia Hernandez, Paola Alvarez, David Followill, Geoffrey Ibbott
 
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AAPM Posters:  
 
Volumetric Modulated Arc Therapy dose delivery evaluation using the Radiological Physics Center head and neck phantom
K Kisling, D Yaldo, D Followill, S Kry, S Scarboro, S Frank, and R Howell
 
A custom-developed method for accurate dose recalculation of patient plans entered into clinical trials
S Davidson, S Kry, J Cui, J Deasy, G Ibbott, M Vicic, A White, D Followill
 
Evaluation of the Sensitivity of the Anisotropic Analytical Algorithm (AAA) to the Commissioning Dataset
D Yaldo, R Tailor, S Scarboro, N Sahoo, S Kry, K Kisling, D Followill, and R Howell
 
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Other Meetings:
 
Safety in Radiation Therapy – A Call to Action
Geoffrey Ibbott. Ph.D.
 
 
 

2009

AAPM Abstracts:
 
Sunday
3:00PM-4:30PM  SU-FF-T-302
Response of OneDoseTM and TLD100 Dosimeters Over 6MV to Pd-103 Equivalent Energies
Z Yu, R Tailor, G Ibbott, N Wells, K Prado
 
3:00PM-4:30PM SU-FF-T-320
The Radiological Physics Center’s Annual TLD Machine Calibration Audit and Its Impact On Clinical Trials
D Followill, J Lowenstein, L Palmer, G Ibbott
 
3:00PM-4:30PM  SU-FF-T-306
Optically Stimulated Light Dosimetry: Commissioning of An Optically Stimulated Luminescence (OSL) System for Remote Dosimetry Audits, the Radiological Physics Center Experience
J Aguirre, P Alvarez, D Followill, G Ibbott, C Amador, A Tailor
 
3:00PM-4:30PM  SU-FF-T-25
Cervix Brachytherapy Dosimetry: Observed Improvement in Data Submitted to Clinical Trials
J Lowenstein, J Roll, G Ibbott
 
3:00PM-4:30PM  SU-FF-T-263
Evaluation of a PAGAT Gel for Use in An Anthropomorphic Phantom
M Heard, G Ibbott, D Followill, E Jackson, M Salehpour, A White
 
3:00PM-4:30PM  SU-FF-T-444
Validation and Benchmark of a Source Model for a Varian 6 MV Photon Beam Using Monte Carlo Calculations
S Davidson, J Cui, S Kry, M Vicic, J Deasy, R White, G Ibbott, D Followill
 
3:00PM-4:30PM  SU-FF-T-370
Evaluation of An Anthropomorphic Pelvis Phantom for Proton Therapy
R Grant, G Ibbott, N Sahoo, S Tucker, X Zhu, D Followill
 
 
3:00PM-4:30PM SU-FF-T-269
Comparison of Out-Of-Field Doses in Pediatric Patients From Craniospinal Irradiations Using Photon, Electron and Proton Spinal Fields
G Georgiev, D Followill, G Ibbott, S Kry, J Fontenot, A White, A Mahajan
 
Monday
7:30AM-8:25AM  MO-A-BRC-1
Credentialing for Clinical Trials: The Role of the RPC (Abstract) (Presentation)
G Ibbott
 
Tuesday
10:00AM-12:00PM  TU-C-BRB-9
Estimate of the Uncertainty in Relative Secondary Cancer Risk Calculations Following Proton Therapy and Intensity Modulated X-Ray Therapy
J Fontenot, C Bloch, D Followill, U Titt, M Zhang, W Newhauser
 
10:00AM-12:00PM  TU-C-303A-1
Evaluating the Accuracy of Four-Dimensional Photon Dose Calculations with Phantom Measurements
Y Vinogradskiy, P Balter, D Followill, P Alvarez, A White, G Starkschall
 
4:00PM-5:30PM TU-E-BRB-3
Performance-Based QA for Radiotherapy: TG-135 - QA for Robotic Radiosurgery
S Dieterich, C Cavedon, C Chuang, A Cohen, J Garrett, C Lee, J Lowenstein, M D'Souza, D Taylor, X Wu, C Yu
 
Wednesday
10:00AM-12:00PM   WE-C-211A-1
Requirements and Opportunities for Maintenance of Certification
G Ibbott, G Frey, R Morin, S Thomas
 
1:30PM-3:20PM   WE-D-BRB-1
Eye Plaque Dosimetry: Report of the AAPM Therapy Physics Committee Task Group No. 129
F Mourtada, S Chiu-Tsao, M Astrahan, P Finger, D Followill, A Meigooni, C Melhus, M Napolitano, R Thomson, M Rivard, M Parish, D Rogers, R Nath
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Posters:  
 
The Radiological Physics Center’s Annual TLD Machine Calibration Audit and Its Impact on Clinical Trials
D. Followill, J. Lowenstein, L. Palmer, G. Ibbott
 
Evaluation of An Anthropomorphic Pelvis Phantom for Proton Therapy
Ryan Grant, Geoffrey S. Ibbott, Beverly Riley, Narayan Sahoo, Susan Tucker, X. Ronald Zhu, David Followill
 
Evaluation of a PAGAT Gel for Use in an Anthropomorphic Phantom
Malcolm Heard, Geoffrey Ibbott, David Followill, Edward Jackson, Mohammad Salehpour, Allen White
 
Cervix Brachytherapy Dosimetry: Observed improvement in data submitted to clinical trials
Jessica R. Lowenstein, Joye Roll and Geoffrey S. Ibbott
 
Comparison of Out-Of-Field Doses in pediatric patients from Craniospinal Irradiations using photon, proton and electron spinal fields
Georgi N. Georgiev, David S. Followill, Ph.D., Jonas D. Fontenot, Ph.D., Anita Mahajan, M.D., Stephen F. Kry Ph.D., Geoffrey S. Ibbott, PhD. R. Allen White, Ph.D., Beverly A. Riley, CMD
 
Verification and Benchmark of a Source Model for a Varian 6 MV Photon Beam Using Monte Carlo Calculations
S Davidson, J Cui , S Kry, M Vicic, J Deasy , A. White, G Ibbott , D Followill
 
Commissioning of an Optically-Stimulated Luminescence (OSL) system for remote dosimetry audits
J.F. Aguirre, P. Alvarez, C. Amador, A. Tailor, D. Followill, G. Ibbott
 
Commissioning a new anthropomorphic spine and lung phantom for the remote validation of treatment plans for institutions participating in RTOG 0631
Douglas Caruthers, Dr. Geoffrey Ibbott, Dr. David Followill
 
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AAPM Summer School:
 
QA for Clinical Dosimetry with Emphasis on Clinical Trials
Geoffrey S. Ibbott, Ph.D.
 
Clinical Implementation of the TG-51 Protocol
David Followill, Ph.D.
 
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Other Meetings:
 
Developing a QA Program in Support of Cooperative Group Clinical Trials
Geoffrey Ibbott. Ph.D.
 
RADIATION THERAPY DATA SUBMISSION
Joye Roll, CMD; Jessica Lowenstein, MS; Geoffrey Ibbott. Ph.D.
 
 

2008

Presentations:
 
Sunday
4:00-6:00  SU-HH-AUD C-10
The Imaging and Dosimetric Capabilities of a Novel CT/MR-Suitable, Anatomically Adaptive, Shielded HDR/PDR Intracavitary Brachytherapy Applicator for the Treatment of Cervical Cancer
M Price, P Eifel, K Gifford, M Zhang, D Followill, M Gillin, F Mourtada
 
Monday
7:30-8:25  MO-A-350-1
Out-Of-Field Dosimetry for Secondary Cancer Studies: Past Experience and Future Needs
X G Xu, D Followill
 
Tuesday
8:30-9:25 TU-B-350-1
The RPC's Evaluation of Advanced Technology Radiation Therapy
G Ibbott
 
10:00-12:00  TU-C-AUD B-3
A Comparison of Heterogeneity Correction Algorithms
P Alvarez, A Molineu, N Hernandez, F Hall, D Followill, G Ibbott
 
10:00-12:00 TU-C-AUD B-8
Identification of a 3D Dosimeter Best-Suited for Use by the RPC
M Heard, D Followill, R White, E Jackson, M Salehpour, G Ibbott
 
Wednesday
1:30-3:20   WE-D-350-1
MOC: The ABR Perspective
G Frey, S Thomas, R Morin, G Ibbott, M Yester
 
Thursday
7:30-9:25  TH-SAM-AUD B-3
Requirements for Addressing Respiratory Motion in Cooperative Group Clinical Trials (SAM Session)
G Ibbott
 
12:30-2:20  TH-D-352-5
Optically Stimulated Luminescence (OSL) Dosimeters Can Be Used for Remote Dosimetry Services
J Homnick, G Ibbott, A Springer, J Aguirre
 
12:30-2:20  TH-D-AUD A-2
Measurement of Neutron Spectrum and Ambient Dose Equivalent Around a Mini-Phantom at a Proton Therapy Facility
Z Wang, S Kry, E Burgett, R Howell, R Tailor, J Oliver, D Followill, A Smith, M Salehpour
 
12:30-2:20  TH-D-AUD A-7
Risk of Secondary Fatal Malignancies From Cyberknife Radiosurgery
M Bellon, D Followill, G Ibbott, R White, M Salehpour, A Mahajan, S Kry, C Ding
 
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Posters:  
 
SU-GG-T-135
Evaluation of PRESAGE/optical-CT 3D Dosimetry for Commissioning a Linac for IMRT
M Oldham, D Sterling, H Sakhalkar, A Molineu, J Adamovics, G Ibbott
 
SU-GG-T-143
Comparisons of a Monte Carlo IMRT Plan Recalculation Results with the Pinnacle Treatment Planning System
J Cui, S Davidson, V Willcut, I El Naqa, D Followill, J Deasy
 
SU-GG-T-159
Has IMRT Delivery Improved in the Last 5 Years?
A Molineu, J Lowenstein, N Hernandez, P Alvarez, D Followill, G Ibbott
 
SU-GG-T-213
Quality Audits of the Calibration for TG-51 Non-Compliant Beams by the Radiological Physics Center
D Followill, A Molineu, J Lowenstein, P Alvarez, J Aguirre, G Ibbott
 
SU-GG-T-287
Deformable Lung Phantom for Verification of 4D Dose Calculations
Y Vinogradskiy, G Starkschall, P Balter, D Followill
 
SU-GG-T-308
Polymer Cross-Linking and Sensitivity Enhancement in Normoxic Polymer Gels Used for Three-Dimensional Dosimetry
R Martin, J BenComo, M Heard, M Martin, K Kaluarachchi, N Wells, R Sadagopan
 
SU-GG-T-345
Verification of a Monte Carlo-Based Source Model for a Varian 10 MV Photon Beam
S Davidson, J Cui, J Deasy, G Ibbott, D Followill
 
TU-FF-A4-2
Evaluation of the Performance of the Fast Scanning Platform of An OCT System
M Heard, G Ibbott
 
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Other Meetings:
 
Radiation Oncology Physics—Acceptance Testing and
Quality Assurance of Treatment Planning Systems
Jake Van Dyk and Geoffrey S. Ibbott
 
Radiation Oncology Physics—Intensity-modulated Radiation Therapy: Patient Safety and Error Reduction
Marcus Randall, Peter Dunscombe and Geoffrey S. Ibbott
 
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2007

Presentations:
 
The Radiological Physics Center's QA Activities
Geoffrey S. Ibbott
 
A Comprehensive Study on the Heterogeneity Dose Calculation Accuracy in IMRT Using an Anthropomorphic Thorax Phantom
S. Davidson, R. Popple, G. Ibbott, D. Followill
 
A Comparison of Heterogeneity Correction Algorithms Within a Lung PTV
P. Alvarez, A. Molineu, N. Hernandez, D. Followill, G. Ibbott
 
Developing Medical Physics Technical Standards Through the AAPM and ANSI
Geoffrey S. Ibbott
 
Respiratory Motion in Cooperative Group Trials
Geoffrey S. Ibbott, Paige Nitsch, Nadia Hernandez, Paola Alvarez
 
Risk of Secondary Fatal Malignancies from Hi-Art Tomotherapy IMRT
S. Lazar, D. Followill, J. Gibbons, A. Mahajan, M. Salehpour, M. Stovall, R. White
 
A Comparison of DPM and VMC++ Monte Carlo Codes Applied to Heterogeneous Media
J. Cui, S. Davidson, P. Lindsay, D. Followill, I. El Naqa, J. Deasy
 
Characterisation, Commissioning and Evaluation of DELTA4 IMRT QA System.
R. Sadagopan, J. BenComo, R.Martin, P. Balter, S. Vedam, G. Nilsson
 
RPC's IMRT Phantoms
Andrea Molineu
 
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Posters:  
 
Dosimetry in an IMRT Phantom Designed for a Remote Auditing Program.
Y. Han, E. Shin, M. Yoon, S. Lee, S. Ju, C. Lim, S. Park, S. Kang, J. Lah, S. Cho, G. Ibbott, Y. Ahn
 
A Monte Carlo Study of the Out-Of-Field Dose from IMRT
S.Kry, M. Salehpour, U. Titt, M. Stovall, R. White, D. Followill
 
Linear Energy Transfer (LET) Dependence of Bang® Polymer Gel Dosimeters in Proton Beams
W. Bivens, G. Ibbott, M. Maryanski, M. Heard, D. Followill, X. Zhu
 
Neutron Dose Equivalent at Depth in a Phantom
S. Kry, D. Followill, M. Salehpour
 
Benchmarking a Flexible Monte Carlo (MC) Tool Based on the Dose Planning Method (DPM) for Use in Evaluating IMRT Treatment Planning Systems
S. Davidson, J. Cui, D. Followill, G. Ibbott, J. Deasy
 
An Open-Source Software Tool to Support Film-Based IMRT Quality Assurance
D. Khullar, A. Molineu, D. Followill, W. Bosch, V. Willcut, T. Simpson, T. Ju, J. Deasy
 
Development of a Modified 3D Radiochromic Dosimeter for Clinical Proton Beams
M. Heard, J. Adamovics, G. Ibbott
 
Dosimetric Characterization of Model CS-1 131Cs Source by Thermoluminescense Dosimetry in Liquid Water.
R. Tailor, G. Ibbott, S. Lampe, W. Bivens, N. Tolani
 
Design of a Jig for Thermoluminescense Dosimetry of Brachytherapy Sources in Liquid Water and the Determination of a Correction Factor for Water-Equivalent Plastics
R. Tailor, G. Ibbott, N. Tolani
 
A Method for Extracting the Relevant MRI Information from Normoxic Polymer Gels Exposed to Low Doses.
R. Martin, J. BenComo, M. Martin, J. Bankson, M. Heard, K. Kaluarachchi, D. Webb, N. Wells, G. Ibbott
 
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Others:  
 
Challenges in Credentialing Institutions and Participants in Advanced Technology Clinical Trials
Geoffrey S. Ibbott
 
Evaluation of Lung Heterogeneity Corrections for Clinical Trials Using the RPC Lung Phantom
David S. Followill
 
Errors in Radiation Oncology
Geoffrey S. Ibbott
 
The Radiological Physics Center's Experience with IMRT
Geoffrey S. Ibbott
 
Brachytherapy in group trials
Geoffrey S. Ibbott
 
Toxicity and Cosmesis from RTOG 95-17: A Phase I/II Trial to Evaluate Brachytherapy as the Sole Method of Radiation Therapy for Stage I and II Breast Carcinoma
Rachel Rabinovitch, Kathryn Winter, Marie Taylor, Robert Kuske, John Bolton, Doug Arthur, Julia White, William Hanson, Ray Wilenzick, and Beryl McCormick
 
Minicourse: Radiation Oncology Physics - Intensity-Modulated Radiation Therapy: Patient Safety and Error Reduction (Course RC222). Part 2
Geoffrey S. Ibbott
 
Minicourse: Radiation Oncology Physics - Intensity-Modulated Radiation Therapy: Patient Safety and Error Reduction (Course RC222). Part 3
Peter Dunscombe
 
Minicourse: Radiation Oncology Physics - Acceptance Testing and QA of Treatment Planning Systems (Course RC422)
J. Van Dyk and G. Ibbott.
 
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2006

     The Radiological Physics Center's Experience with IMRT
Geoffrey S. Ibbott

     Brachytherapy In cooperative Group Clinical Trials
Geoffrey S. Ibbott and RPC Staff

     The State of Radiotherapy Physics Through the Eyes of a Quality Auditor
David Followill

     Adequacy of IMRT QA Procedures as Determined by Irradiations of a Head and Neck IMRT Anthropomorphic Phantom
Andrea Molineu, Paola Alvarez, Nadia Hernandez, David S. Followill, Geoffrey S. Ibbott

     The Credentialing Process for the NSABP B-39 / RTOG 0413 Partial Breast Irradiation Trial
Jessica R. Lowenstein, Cynthia Davis, Joye Roll, Irene Harris, Franklin Hall, David S. Followill, and Geoffrey S. Ibbott

     The Value of Credentialing
Jessica R. Lowenstein, Joye Roll, David S. Followill, and Geoffrey S. Ibbott

        Characterization of EBT versus MD55 Gafchromic ®films for relative dosimetry measurements
Paola Alvarez, Nadia Hernandez, David Followill, Ramesh Tailor and Geoffrey Ibbott

        Dose calculation accuracy in the presence of high-z materials using megavoltage CT for treatment planning.
Hecox R, Gibbons J, Followill D, Ibbott G.

        Evaluation of heterogeneity correction algorithms through the irradiation of a lung phantom
P. Alvarez, A. Molineu, N. Hernandez, D. Followill, G. Ibbott

     IMRT Heterogeneity dose calculation algorithm accuracy using anthropomorphic thorax phantom
S. Davidson, K. Prado, G. Ibbott, D. Followill

     A Physicist's Guide to the International Electrotechnical Commission
Geoffrey S. Ibbott, Ph.D. Chair, Subcommittee 62C Member, WG-1 Chair, US TAG to WG-1

     Quality Assurance and New Technologies in Radiation Medicine (QANTRM)
Geoffrey S. Ibbott, David S. Followill, Andrea Molineu, Paola Alvarez, Nadia Hernandez.

2005

         Evaluation Of Doses Delivered By SBRT To The Lung Of An Anthropomorphic Thorax Phantom
Paola Alvarez,
Andrea Molineu, Nadia Hernandez, David S. Followill, and Geoffrey S. Ibbott

         Analysis of Errors Made During 163 IMRT Irradiations of an Anthropomorphic Phantom

Andrea Molineu, Paola Alvarez, Nadia Hernandez, David S. Followill, Geoffrey S. Ibbott

         Reference Electron Beam Dosimetry Data Set: A Preliminary Analysis

José A. Bencomo, Rita Weathers, Marilyn Stovall, and Geoffrey S. Ibbott

         Verification Of Dose Point Kernels For 192Ir Brachytherapy

José A. Bencomo, Daniel J. Macey, and Ann Lawyer

         Heterogeneity Dose Calculation Algorithm Accuracy In IMRT Using Anthropomorphic Thorax Phantom

S. Davidson, D. Followill, K. Prado, G. Ibbott

         Common Dosimetry Errors in Cervix Patients treated with Brachytherapy on Clinical Trials

Jessica R. Lowenstein, Joye Roll and Geoffrey S. Ibbott

         Credentialing Requirements for NSABP B-39 / RTOG 0413

Jessica R. Lowenstein, Joye Roll, Cynthia Davis, Paul Holguin, Huy Duong, David S. Followill, and Geoffrey S. Ibbott

         IMRT Head and Neck Phantom Irradiations: Correlation of Results with Institution Size

Andrea Molineu, Nadia Hernandez, Paola Alvarez, David S. Followill, and Geoffrey S. Ibbott

         The Radiological Physics Center’s Anthropomorphic Quality Assurance Phantom Family:New Developments

David S. Followill, and Geoffrey S. Ibbott

         The Radiological Physics Center A QA Resource in Radiation Therapy

Geoffrey S. Ibbott

         Development of an Independent Audit Device for Remote Verification of 4D Radiotherapy

Jason Shoales, David S. Followill, and Geoffrey S. Ibbott

         Clinical Reference Dosimetry of a “Hi-Art II Helical Tomotherapy Machine

David S. Followill, Andrea Molineu, John McGary, and Geoffrey S. Ibbott

         Evaluation of the TomoTherapy Planning Station Heterogeneity Correction Algorithm Using an Anthropomorphic Phantom

David S. Followill, Andrea Molineu, John McGary, and Geoffrey S. Ibbott

         Monte Carlo Assisted Study of the microSelectron 192Ir Brachytherapy Source

Hilary Vass, Firas Mourtada, John Horton, Sang Cho, Anuja Jhingran, R. Allen White, and Geoffrey S. Ibbott

 

2004

         Evaluation of IMRT for Institutions Participating in NCI Sponsored Clinical Trials
Andrea Molineu, Paola Alvarez, Nadia Hernandez, David S. Followill, and Geoffrey S. Ibbott

         Anthropomorphic Phantoms for Quality Assurance in Radiation Therapy
P. Alvarez, A. Molineu, N. Hernandez, D.S. Followill, P. Balter, W.F. Hanson and G.S. Ibbott

         Use of MOSFET detectors in an anthropomorphic breast phantom to verify dose and dose distribution  

Jose A. BenComo, Sang H. Cho, Tzouh-Liang Sun, Seungsoo Lee and Geoffrey S. Ibbott

         Gel Dosimetry Technique for Measurements in High Dose Gradients
Malcolm P. Heard and Geoffrey S. Ibbott

         On the Choice of Measured Depth Dose Data for the Monte Carlo
Modeling of the 18 MV Photon Beam: Shifted vs. Unshifted
Sang Hyun Cho, Oleg Vassiliev, Helen Liu, Geoffrey S. Ibbott, and Radhe Mohan

         High-Energy Photon Standard Dosimetry Data: A Quality Assurance Tool
David Followill, Ph.D., Jessica Lowenstein, M.S., Geoffrey Ibbott, Ph.D.

         The Accuracy of 3-D Inhomogeneity Photon Algorithms in Commercial Treatment Planning Systems using a Heterogeneous Lung Phantom
Gary Fisher, B.S., David Followill, Ph.D., Geoffrey Ibbott, Ph.D.

         Energy dependence of a TLD-100 system for characterizing low energy brachytherapy sources
J. Esteban, R.C. Tailor, S. Cho and G. S. Ibbott

         Evaluation of 94 IMRT irradiations of an anthropomorphic H&N phantom
Andrea Molineu, Paola Alvarez, Nadia Hernandez, David S. Followill and Geoffrey S. Ibbott

                   

2003

         Characterizing Dose Distributions of Brachytherapy Sources Using Normoxic Gel.
M.P. Heard, D.S. Followill and G.S. Ibbott

         Magic Gel for Head and Neck IMRT
M. Beach, G. Ibbott, D. Followill, W. Hanson, C. Bloch, E. Jackson, S. Tucker

         TLD measurements in liquid water of dosimetry characteristics of a new 125I seed.
R. C. Tailor, J. Esteban and G.S. Ibbott

         Quality-Assurance Check of Collimator and Phantom-Scatter Factors.
Ramesh C. Tailor, David S. Followill, Nadia Hernandez, Timothy S. Zhu and Geoffrey S. Ibbott

         Are photon and electron beam calibrations more consistent with TG-51 than with TG-21?
Ramesh C. Tailor, William F. Hanson, Nathan Wells and Geoffrey S. Ibbott

         To Plan or not to Plan: Multiple High Dose Rate (HDR) Brachytherapy Insertions.
Lowenstein, J.R., Roll, J., and Ibbott, G. S.

         Evaluation of dosimetry parameters of photons and electron beams using a linear ionization chamber array.
Jose A. Bencomo, Geoffrey Ibbott, Seungsoo Lee and Joao A. Borges

         A Gel Lung-Equivalent Material for 3D Dosimetry.
Jose A. Borges, M.S., Jose A. Bencomo, Ph.D., Geoffrey S. Ibbott, Ph.D. and Jingfei Ma, Ph.D.

         Energy dependence of a TLD system for characterizing low energy brachytherapy sources.
J. Esteban, G.S. Ibbott, W. Hanson, J. Horton and S.Cho

                   

2002

         Implementation of a Polymer Gel Dosimetry Insert for an Anthropomorphic Head Phantom Used to Evaluate Head and Neck Intensity-Modulated Radiation Therapy
Michael L. Beach, Geoffrey S. Ibbott and Marek Maryanski

         Reference Photon Dosimetry Data for the Siemens Primus Linear Accelerator:  Preliminary Results for Depth Dose and Output Factor
Sang Hyun Cho and Geoffrey S. Ibbott

         Verification of Plaque Simulator Dose Distributions Using Radiochromic Film
Amanda Krintz, William F. Hanson, Geoffrey S. Ibbott and David S. Followill

         Quality Assurance of Linear Accelerators Using Arrays of MOSFET Dosimeters:  A Feasibility Study
Jose A. Bencomo, and Geoffrey S. Ibbott

         Experience with an IMRT Head and Neck QA Phantom
Andrea Nelson, Peter Balter, William F. Hanson, Geoffrey S. Ibbott

         Radiotherapy Quality Assurance of Gynecologic Oncology Group (GOG) Protocol 165, A Cooperative Group Study of Carcinoma of the Cervix Lowenstein
J.R., Roll, J., Hanson, H.W., Davis, D.S., Lanciano R., Calkins, A., Petereit, D., Varia, M., Ibbott, G.S.

                   

2001

         A Reanalysis of the Collaborative Ocular Melanoma Study Medium Tumor Trial Eye Plaque Dosimetry
Amanda Krintz, David S. Followill, Michelle Melia and Willaim F. Hanson

         Electron Calibrations:  Parallel Plate Chambers vs. Cylindrical Chambers
Peter Balter, J.R. Lowenstein and William F. Hanson

         Problems and Shortcomings of the RPC Remote Monitoring Program of Institutions Dosimetry Data
J.A. Bencomo, N. Hernandez and William F. Hanson

         Standard Wedge and Tray Transmission Values for Varian, Seimens, Elekta/Philips Accelerators;  A Quality Assurance Tool
David S. Followill, Nadia Hernandez and William F. Hanson

         Dose Specification and Quality Assurance of RTOG Protocol 95-17, A Cooperative Group Study of 192 IR Breast Implants as Sole Therapy
W.F. Hanson, B. Martin, R. Kuske, D. Arthur, R. Rabinovitch, J. White, R. Wilenzick, I. Harris, R.C. Tailor, D.S. Davis   Poster and Slides

         Calculated TG51 to TG21 Absorbed-Dose Ratios For Most Widely Used Cylindrical and Parallel-Plate Ion Chambers Over a Range of Photon and Electron Energies
R.C. Tailor and W.F. Hanson

         Design of an Anthropomorphic Intensity Modulated Radiation Therapy Quality Assurance Phantom
Dee-Ann Radford, David S. Followill and William F. Hanson

         

2000

         Comparison of On-Site and Off-Site Evalutations of Dosimetry Data
J.A. Bencomo, D.S. Followill, S.H. Cho, P.Balter, R.C. Tailor, J.R. Lowenstein, N. Hernandez, and W.F. Hanson;

         Standard Electron Cone Ratio Values for Varian, Siemens and Elekta (Philips) Accelerators
David S. Followill, Ramesh C. Tailor, Nadia Hernandez and William F. Hanso

         Implementation of TG-51: Practical Considerations
J.R. Lowenstein, P. Balter, D.S. Followill and W.F. Hanson;

         Design of a Heterogeneous Thorax Phantom for Remote Verification of Three-Dimensional Conformal Radiotherapy
Christopher P. Cherry, David S. Followill, William F. Hanson;

         Design of an Anthropomorphic Intensity Modulated Radiation Therapy Quality Assurance Phantom
Dee-Ann Radford, David S. Followill, Peter A. Balter, William F. Hanson;

         Practical Considerations for the Calibration of Low Energy/Low Activity Seeds
Peter A. Balter, J. Francisco Aguirre, and William F. Hanson;

         **Protocol Pre-Approval Processes for Radiotherapy Treatment on Clinical Trials; The RPC Experience.
Denise S. Davis, David S. Followill, Ramesh C. Tailor, Jessica R. Lowenstein, I. Harris, Joye Roll, and William F. Hanson (Oral Presentation)

** Poster not currently available.

 

1999

         RPC Experience with TLD for Output and Energy Monitoring of Radiation Therapy Beams
Ramesh C. Tailor, J. Francisco Aguirre, and William F. Hanson

         Analysis of Radiological Physics Center Remote Tools Program Data
Jose A. Bencomo, Jessica R. Lowenstein, Denise S. Davis, Cynthia M. Davis, and William F. Hanson  

         An Anthropomorphic Head Phantom for Remote Monitoring of Stereotactic Radiosurgery at Multiple Institutions
Peter Balter, Marilyn Stovall, Cathy Kasper, Susan Smith, and William F. Hanson  

         Comparison between TG-51 and TG-21: The results of TG-51 beta testing
Jessica R. Lowenstein, Sang H. Cho, Peter A. Balter, and William F. Hanson