Back to Search
Start Over
Dosimetric validation of Monaco treatment planning system on an Elekta VersaHD linear accelerator
- Source :
- Journal of Applied Clinical Medical Physics
- Publication Year :
- 2017
-
Abstract
- 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 study. The dosimetric output of the new Agility head combined with the FFF photon modes warranted this investigation into the dosimetric accuracy prior to clinical usage. A model of the VersaHD linac was created in Monaco TPS by Elekta using commissioned beam data including percent depth dose curves, beam profiles, and output factors. A variety of 3D conformal fields were created in Monaco TPS on a combined Plastic water/Styrofoam phantom and validated against measurements with a calibrated ion chamber. Some of the parameters varied including source to surface distance, field size, wedges, gantry angle, and depth for all photon and electron energies. In addition, a series of step and shoot IMRT, VMAT test plans, and patient plans on various anatomical sites were verified against measurements on a Delta4 diode array. The agreement in point dose measurements was within 2% for all photon and electron energies in the homogeneous phantom and within 3% for photon energies in the heterogeneous phantom. The mean ± SD gamma passing rates of IMRT test fields yielded 93.8 ± 4.7% based on 2% dose difference and 2 mm distance‐to‐agreement criteria. Eight previously treated IMRT patient plans were replanned in Monaco TPS and five measurements on each yielded an average gamma passing rate of 95% with 6.7% confidence limit based on 3%, 3 mm gamma criteria. This investigation on dosimetric validation ensures accuracy of modeling VersaHD linac in Monaco TPS thereby improving patient safety.
- Subjects :
- Photon
Monte Carlo method
Dose profile
Imaging phantom
Linear particle accelerator
030218 nuclear medicine & medical imaging
Percentage depth dose curve
dosimetric validation
03 medical and health sciences
0302 clinical medicine
Optics
Neoplasms
Humans
Radiation Oncology Physics
Radiology, Nuclear Medicine and imaging
87.10.Rt
VersaHD
Radiation treatment planning
Radiometry
Instrumentation
Monte Carlo
Physics
Radiation
business.industry
Phantoms, Imaging
Radiotherapy Planning, Computer-Assisted
87.55.k
Monaco
Radiotherapy Dosage
030220 oncology & carcinogenesis
Ionization chamber
Radiotherapy, Intensity-Modulated
Particle Accelerators
treatment planning system
business
Nuclear medicine
Monte Carlo Method
Algorithms
Subjects
Details
- ISSN :
- 15269914
- Volume :
- 18
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Journal of applied clinical medical physics
- Accession number :
- edsair.doi.dedup.....96e8d00d34ff7a5f6b7b23ee0a923218