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Validation of fluence-based 3D IMRT dose reconstruction on a heterogeneous anthropomorphic phantom using Monte Carlo simulation
- Source :
- Journal of Applied Clinical Medical Physics
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- In this study, we evaluated the performance of a three‐dimensional (3D) dose verification system, COMPASS version 3, which has a dedicated beam models and dose calculation engine. It was possible to reconstruct the 3D dose distributions in patient anatomy based on the measured fluence using the MatriXX 2D array. The COMPASS system was compared with Monte Carlo simulation (MC), glass rod dosimeter (GRD), and 3DVH, using an anthropomorphic phantom for intensity‐modulated radiation therapy (IMRT) dose verification in clinical neck cases. The GRD measurements agreed with the MC within 5% at most measurement points. In addition, most points for COMPASS and 3DVH also agreed with the MC within 5%. The COMPASS system showed better results than 3DVH for dose profiles due to individual adjustments, such as beam modeling for each linac. Regarding the dose‐volume histograms, there were no large differences between MC, analytical anisotropic algorithm (AAA) in Eclipse treatment planning system (TPS), 3DVH, and the COMPASS system. However, AAA underestimated the dose to the clinical target volume and Rt‐Parotid slightly. This is because AAA has some problems with dose calculation accuracy. Our results indicated that the COMPASS system offers highly accurate 3D dose calculation for clinical IMRT quality assurance. Also, the COMPASS system will be useful as a commissioning tool in routine clinical practice for TPS. PACS number: 87.55.Qr, 87.56.Fc, 87.61.Bj
- Subjects :
- Computer science
Monte Carlo method
quality assurance
Fluence
Linear particle accelerator
Imaging, Three-Dimensional
Neoplasms
Compass
Image Processing, Computer-Assisted
Radiation Oncology Physics
Humans
Radiology, Nuclear Medicine and imaging
IMRT
Radiometry
Radiation treatment planning
Instrumentation
Simulation
Radiation
Dosimeter
Phantoms, Imaging
business.industry
Radiotherapy Planning, Computer-Assisted
Radiotherapy Dosage
three‐dimensional measurement
Anthropomorphic phantom
Radiotherapy, Intensity-Modulated
Particle Accelerators
verification
Nuclear medicine
business
Monte Carlo Method
Quality assurance
Software
three‐dimensional reconstruction
Subjects
Details
- ISSN :
- 15269914
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Clinical Medical Physics
- Accession number :
- edsair.doi.dedup.....58a3828ceb296ec0bc5012aaf8a60047