2017 Poster Presentations

Dosimetric Comparisions between Pinnacle Auto-Plan and Manual VMAT for Lung Cancer
K. Agbayani, A. Estrada, R. Gongora, Y. Ngo, D. Nguyen, D. Ng
University of Texas MD Anderson School of Health Professions – Houston, Texas
Poster Summary: Dosimetric comparisons between Pinnacle Auto-Plan and manual VMAT plans for lung cancer treatment.


ClearView Radiation Shielding
J. Bakshi
Radium
Poster Summary: This poster presents development, validation, attenuation testing results, and applications of ClearView Radiation Shielding; a high energy, non-toxic, neutron-gamma transparent and liquid radiation shield.


Direct Optimization of Volumetric Modulated Arc Therapy Fields From Initial Dynamic Conformal Arcs
C. Amaloo, K. Vickrey, H. Liu, D. Wiant
Cone Health Cancer Center, Greensboro, North Carolina
Poster Summary: Examination of Varian’s new V15 optimizer that allows for direct optimization of VMAT arcs from initial DCA fields shows reduced modulation without significant dosimetric degradation.


Optimising Breast Planning for Large Separation Patients
D. Church, S. Smith
Beatson West of Scotland Cancer Centre (BWoSCC), Glasgow
Poster Summary: A retrospective study of breast cancer patients previously treated using 16MV photons were planned using 10MV flattened and 10MV flattening filter free IMRT techniques.


Construction and Evaluation of RapidPlanTMmodels for Radical Lung Planning
Y. Flanagan, P. Kelso, S. Smith
Beatson West of Scotland Cancer Centre (BWoSCC), Glasgow
Poster Summary: A retrospective planning study of 20 lung patients prescribed 55Gy in 20 fractions comparing 3 RapidPlanTM models and manually optimised plans.


Evaluation of VMAT and FFF-VMAT Treatment Plans for Left-Sided DIBH Patients
M. Koduvathra, D. Stanley, D. Cohen, Z. Shi, A. Kuchta, D. Baacke, N. Kirby, S. Stathakis
University of Texas Health Science Center at San Antonio, San Antonio, TX
Poster Summary: Evaluation of VMAT and FFF-VMAT Treatment Plans for Left-sided DIBH Patients.


Real Time Online Matching in High Dose per Fraction Treatments: Do Radiation Therapists Perform as Well as Physicians?
G. Grinfeld, Y. Lipsky, S. Zalmanov, Y. Tova, V. Greenberg, R. Pfeffer, D. Levin,
Dept. of Radiotherapy, Assuta Medical Centers
Poster Summary: Well-trained RTTs can perform patient positioning matches from on-board imaging as well as physicians.  This could allow physicians to verify matches offline, improving treatment flow.


Dynamic Conformal Arc-Hybrid Technique for Standard Fractionation used for Multiple Treatment Sites
H. Parks, M. Xu, R. Foster, S. Schmidt
Northwestern Medicine Cancer Centers, Warrenville, IL and Geneva, IL
Poster Summary: Unique approach using Dynamic Conformal Arc (DCA)-Hybrid technique to improve dose conformality for target volume while sparing local OARs to achieve clinically acceptable results.


Comparison of Optimization Methods for Stereotactic BodyRadiation Therapy (SBRT) of Early Stage Non-Small-Cell Lung Cancer
L. Williams, D. Wiant, B. Sintay, H. Liu
Cone Health Cancer Center, Greensboro, North Carolina
Poster Summary: Comparison of the new Eclipse V15 Photon Optimization algorithm (PO) with its predecessor, progressive resolution optimizer (PRO) for lung SBRT.


Fully Automated Volumetric Modulated Arc Therapy versus Manually Generated Volumetric Modulated Arc Therapy for Prostate Cancer Patients
C. Evans, Y. Dorsainvil, R. Kumar, M. Khan, M. Chatarpal, P. Castillo, J. Nuanjing
University of Texas at MD Anderson School of Health Professions
Poster Summary: The results imply that auto-planning is solely able to provide an optimal starting point over manual planning for dosimetrists by optimizing dose to critical structures.


Dosimetric Analysis of Left Breast DIBH VMAT Plans Comparing Sequential and SIB Techniques
D. Trongaard, D. Cohen, D. Stanley, A. Kuchta, Z. Shi, D. Baacke, N. Kirby
University of Texas Health Science Center at San Antonio, San Antonio, TX
Poster Summary: Dosimetric analysis of left breast DIBH VMAT plans comparing sequential and SIB techniques.


Delivery Verification of HDR using a Multi-Channel Vaginal Cylinder Utilizing Rectal Sparing
E. Bowers, N. Bassiri, J. McCulloch, D. Baacke, N. Papanikolaou, N. Kirby, D. Saenz, K. Rasmussen
UT Health San Antonio – MD Anderson Cancer Center; San Antonio, TX
Poster Summary: This is a study to verify the dose delivered during HDR using a multi-channel vaginal cylinder utilizing rectal sparing compared to a traditional vaginal cylinder.


A Method of Creating Bolus for Superficial Tumors using Non-Ionizing Imaging and 3D Printing
R. Nazaroff, N. Bassiri, N. R. Astorga,T. Eng, D. Baacke, T. Kyenzeh, N. Kirby, S. Stathakis, D. Saenz, N . Papanikolaou, K. Rasmussen
UT Health San Antonio –MD Anderson Cancer Center; San Antonio, TX
Poster Summary: Custom bolus using a non-ionizing radiation infrared scanner and 3D printer, is an accurate, efficient, and cost effective method for treatment of surface and subdermal tumors.


Reducing the Hot Spot in Whole Brain Radiation Therapy
K. McKenna, M. Podgorsak
Roswell Park Cancer Institute, Buffalo, New York
Poster Summary: To study alternative treatment techniques to reduce the global dose maximum in Whole Brain Radiation Therapy.


Evaluation of Two and Three Arc VMAT Treatment Plans for Left Sided DIBH Breast Patients
K. Greco, D. Stanley, D. Cohen, A. Kuchta, D. Baacke, Z. Shi, N. Kirby
University of Texas Health Science Center at San Antonio, San Antonio, TX
Poster Summary: This study evaluates the clinical practicality and dosimetric differences between treating patients with left-sided breast cancer using VMAT-DIBH with two vs three arcs.


Evaluation of Range Dependent Tumor to PTV Margins for NSCLC using SBRT
J. M. Keim, A.Patel-Yadav, M. Greene, D. Mohatt,  J. Gomez, H. K. Malhotra
Roswell Park Cancer Institute, Buffalo, NY
Poster Summary: A study whether different ITV to PTV margins may yield similar PTV as that derived from 10-phase breathing cycle in management of NSCLC using SBRT.


Evaluate Robustness of dose inhomogeneity in Hypo-Fractionated Planned Breast using RayStation’s Perturbed Dose Function
J. Metzger
Eastern Maine Medical System, Bangor ME
Poster Summary: Evaluate specific dose volumes and global maximum for hypo-fractionated breast plans in systematically perturbed states compared to the initial simulated state.


Dosimetric Evaluation of GTV to PTV Tumor Margins for Stereotactic Lung Radiotherapy Using Non-Traditional Segmentation Techniques
M. C. Greene, A. Patel-Yadav, J. M. Keim, D. J. Mohatt, J. Gomez,H. K. Malhotra
Roswell Park Cancer Institute, Buffalo, New York
Poster Summary: To study the dosimetric implications of PTV’s generated using alternative methods incorporating lung tumor motion against 10 phase PTV’s for NSCLC SBRT treatments.


Pelvic Motion: A Retrospective Dosimetric Study of Five Gynaecological Patients Treated with Adaptive Radiotherapy
B. Hunter, S. Smith, C. Hannah
Beatson West of Scotland Cancer Centre (BWoSCC), Glasgow
Poster Summary: A retrospective study utilising new technologies and assessing their impact in adaptive treatment planning for gynaecological cancers, when and how should we adapt?


A Randomised Phase II Trial of Standard -vs- Dose Escalated Radiotherapy for the Treatment of Malignant Pleural Mesothelioma
R. Valentine, S. Smith, M. Ashton
Beatson West of Scotland Cancer Centre (BWoSCC), Glasgow,
Poster Summary: SYSTEMS-2 is a randomised clinical trial comparing dose escalated, hypofractionated radiotherapy with standard radiotherapy for malignant pleural mesothelioma (MPM).


MRI Planning for LDR Prostate Brachytherapy
T. L. Bruno,  P. Berner, M. Cunningham, R. Kudchadker, P. Blanchard, T. Bathala,
A. Venkatesan, S. Frank
University of Texas MD Anderson School of Health Professions – Houston, Texas
Poster Summary: This poster describes our MRI-based program for diagnosis, simulation, pre-treatment planning, and post treatment dosimetry evaluation for prostate brachytherapy, an effective prostate cancer treatment.


Hippocampal Sparing Whole Brain: Rapid Plan Model Following the NRG-CC001 Protocol
V. Magliari, A. Magliari, R. Foster
St Anthony's Medical Center
Poster Summary: Knowledge based planning: RapidPlan Hippocampal sparing model utilizing a recursive method of model training with defined plan quality metrics. Results demonstrate a KBP solution that produces high quality plans efficiently and with very consistent result.


Dosimetric Efficiency of a Single-Isocenter vs Traditional Two-Isocenter Technique for Spine Stereotactic Radiosurgery of Two Vertebral Lesions Separated by One Vertebral Body
M. Rambaud, T. Ford, J. Payne, H. Syed, J. Sutton
University of Texas MD Anderson School of Health Professions – Houston, Texas
Poster Summary: The purpose of this study was to determine the dosimetric efficiency for the use of a single isocenter versus the traditional two isocenter technique for spine stereotactic radiosurgery (SSRS) of two vertebral lesions separated by one vertebral body.


VMAT planning dependence on MLC width is MLC width important for VMAT treatment planning?
L. Brady, D. Mihailidis
The Hospital of the University of Pennsylvania
Poster Summary: To investigate whether micro-MLC’s result in superior plans for VMAT.


A Dosimetric Comparison on the Efficiency of Philips Pinnacle’s 9.10v Auto-Plan Algorithm: Comparison of VMAT Manual Plan vs. VMAT Auto-Plan in the Treatment of Glioblastomas.
I. D. Valdez, S. H. Vo, A. Martinez Jr, B. L. Barker, M. F. Gomez, S. J. Kuruvila
University of Texas MD Anderson School of Health Professions – Houston, Texas
Poster Summary: The purpose of this study was to dosimetrically compare Philips Pinnacle’s 9.10v auto-plan algorithm versus conventional planning methods in the treatment of GBM via VMAT


Use of a Novel Multi-criteria Optimization Algorithm in a Commercially Available Treatment Planning System to Evaluate Organ at Risk Sparing
D. DiCostanzo, D. Christ, A. S. Ayan, J. Woollard, N. Gupta
Ohio State University, Arthur G. James Cancer Hospital & Richard J. Solove Research Institute, Columbus, OH
Poster Summary: Utilizing the Eclipse MCO after DVH based optimization shows reduction in OAR dose and increased target homogeneity to clinically acceptable head and neck treatment plans


Utility of Adding Non-coplanar Arcs in the Treatment of Paranasal Sinus and Nasal Cavity Cancers
D. M. Gintz, J. J. Caudell
H. Lee Moffitt Cancer Center, Tampa, Florida
Poster Summary: Adding non-coplanar arcs to the treatment plans of paranasal sinus/nasal cavity cancer cases may aid in further reduction  of dose to critical visual structures.


Treatment Planning for Patients with Metal Implants Using Proton Pencil Beam Scanning
C. Gann, W. Ichter, S. Tang, C. Chang
Texas Center for Proton Therapy-Irving, TX
Poster Summary: A treatment planning technique that minimizes the dosimetric uncertainty by selectively placing proton pencil beam spots to avoid metal implants in the patient.


Dosimetry Effects from Variable Rectal Gas Volume during Prostate Radiation Treatment Course
D. Bourgeois, B. K. Lee, J. Moayyad, J. Zhang, J. J. Cho-Lim, W. S. Inouye, S. P. Lee
Poster Summary:  In this retrospective case study of a patient found to have frequent occurrences of rectal gas distention, dose coverage for the prostate was analyzed with sequential CBCT studies in order to determine if clinical intervention to mitigate rectal distention was necessary.


Comparison of 3DRT and VMAT Treatment Techniques on Vaginal Doses in Female Anal
Cancer Patients With and Without the Use of Vaginal Cylinders

K. E. Shaner; D. S. Tatro, CMD, RT(T); S. Green, M.S., CMD, RT(T)
Poster Summary: A Comparison of 3DRT and VMAT Treatment Techniques on Vaginal Doses in Female Anal Cancer Patients With and Without the Use of Vaginal Cylinders.


A Dosimetric Study on the Optimal Beam Arrangement of the Gastroesophageal Junc@on:
A Comparison of Coplanar and Non-coplanar VMAT Techniques

M. E. Doyle, B.S
Grand Valley State University
Poster Summary:  A Dosimetric Study on the Optimal Beam Arrangement of the Gastroesophageal Junction: A Comparison of Coplanar and Non-coplanar Volumetric Modulated Arc Radiotherapy Techniques


Dosimetric Impact of Radiotherapy Plans with the Use of a Metal Artifact Reduction
Algorithm Applied during CT Simulation

E. Manduzzi, B.S.
Grand Valley State University
Poster Summary: This research study evaluates the dosimetric impact of GE Healthcare’s projection-based Smart Metal Artifact Reduction (MAR) algorithm for radiation therapy plans.