Zobrazeno 1 - 10
of 24
pro vyhledávání: '"D Defoor"'
Autor:
Sotirios Stathakis, C Kabat, A Alexandrian, D Defoor, Ganesh Narayanasamy, Renil B. George, Kristen A. McConnell, Neil Kirby, Nikos Papanikolaou, Panayiotis Mavroidis
Publikováno v:
Journal of Applied Clinical Medical Physics
Purpose Dose–volume histogram (DVH) measurements have been integrated into commercially available quality assurance systems to provide a metric for evaluating accuracy of delivery in addition to gamma analysis. We hypothesize that tumor control pro
Publikováno v:
Journal of Applied Clinical Medical Physics
In this project, we investigated the use of an electronic portal imaging device (EPID), together with the treatment planning system (TPS) and MLC log files, to determine the delivered doses to the patient and evaluate the agreement between the treatm
Publikováno v:
Journal of Applied Clinical Medical Physics
The purpose of this study is to perform dosimetric validation of Monaco treatment planning system version 5.1. The Elekta VersaHD linear accelerator with high dose rate flattening filter‐free photon modes and electron energies was used in this stud
Autor:
Sotirios Stathakis, Yuting Li, Niko Papanikolaou, Chul S. Ha, William E. Jones, D Defoor, A Licon, Panayiotis Mavroidis, T Eng, John R. Ford, Richard L. Crownover
Publikováno v:
Medical Physics. 43:3557-3558
Purpose: To create an IMRT treatment plan quantitative score using QUANTEC dose/volume parameters to assess plan quality. Methods: 132 IMRT patient plans of various treatment sites were evaluated. The optimized plan's dose volume histogram (DVH) was
Publikováno v:
Medical Physics. 43:3687-3688
Purpose: To investigate inter-fraction differences of dose delivery by analyzing portal images acquired during treatment and implement an automated system to generate a report for each fraction. Large differences in images between fractions can alert
Publikováno v:
Medical Physics. 43:3515-3516
Purpose: As modern linacs have become more technologically advanced with the implementation of IGRT and IMRT with HDMLCs, a requirement for more elaborate tracking techniques to monitor components’ integrity is paramount. ElektaLog files are genera
Autor:
Niko Papanikolaou, Panayiotis Mavroidis, D Defoor, L Vazquez Quino, S Stathakis, Alonso N. Gutierrez
Publikováno v:
International Journal of Cancer Therapy and Oncology, Vol 2, Iss 2 (2014)
Purpose: This research, investigates the viability of using the Electronic portal imaging device (EPID) coupled with the treatment planning system (TPS), to calculate the doses delivered and verify agreement with the treatment plan. The results of QA
Publikováno v:
Medical Physics. 42:3517-3518
Purpose: To verify daily intensity modulated radiation therapy (IMRT) treatments using multi-leaf collimator (MLC) log files. Methods: The MLC log files from a NovalisTX Varian linear accelerator were used in this study. The MLC files were recorded d
Publikováno v:
Medical Physics. 42:3460-3461
Purpose: To study the frequency of Multi-Leaf Collimator (MLC) leaf failures, investigate methods to predict them and reduce linac downtime. Methods: A Varian HD120 MLC was used in our study. The hyperterminal MLC errors logged from 06/2012 to 12/201
Publikováno v:
Physica Medica. 32:196
Purpose To investigate the viability of patient specific IMRT QA method which uses MLC log files to recreate a delivered fluence and compare to the planned fluence. Materials and methods A Varian Novalis Tx equipped with a HD120 MLC was used in this