IMRT verification with a camera-based electronic portal imaging system

An evaluation of the capabilities of a commercially available camera-based electronic portal imaging system for intensity-modulated radiotherapy verification is presented. Two modifications to the system are demonstrated which use a novel method to tag each image acquired with the delivered dose mea...

Full description

Saved in:
Bibliographic Details
Published in:Physics in medicine & biology 2000-12, Vol.45 (12), p.N183-N196
Main Authors: Partridge, Mike, Symonds-Tayler, J Richard N, Evans, Philip M
Format: Article
Language:English
Subjects:
Biological and medical sciences
Breast Neoplasms - radiotherapy
Calibration
Humans
Image Processing, Computer-Assisted - instrumentation
Image Processing, Computer-Assisted - methods
Medical sciences
Models, Statistical
Radiometry
Radiotherapy, Conformal - instrumentation
Radiotherapy, Conformal - methods
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Reproducibility of Results
Technology. Biomaterials. Equipments. Material. Instrumentation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An evaluation of the capabilities of a commercially available camera-based electronic portal imaging system for intensity-modulated radiotherapy verification is presented. Two modifications to the system are demonstrated which use a novel method to tag each image acquired with the delivered dose measured by the linac monitor chamber and reduce optical cross-talk in the imager. A detailed performance assessment is presented, including measurements of the optical decay characteristics of the system. The overall geometric accuracy of the system is determined to be +/-2.0 mm, with a dosimetric accuracy of +/-1.25 MU. Finally a clinical breast IMRT treatment, delivered by dynamic multileaf collimation, is successfully verified both by tracking the position of each leaf during beam delivery and recording the integrated intensity observed over the entire beam.
ISSN:0031-9155
1361-6560
DOI:10.1088/0031-9155/45/12/402