Measurement possibilities using an electronic portal imaging device.

2.50
Hdl Handle:
http://hdl.handle.net/10541/99599
Title:
Measurement possibilities using an electronic portal imaging device.
Authors:
Kirby, Mike C; Williams, Peter C
Abstract:
A vital role in the quality control of radiotherapy is the use of portal imaging for verifying field size, shape, orientation and patient set-up. Coincidence of treated volume and target volume is imperative. Electronic portal imaging devices are effective at providing this verification. However, these devices are versatile enough to be used in other ways pertinent to the delivery of high quality, high precision radiotherapy. This paper examines two such ways: in assessing the reproducibility of a multileaf collimator system, and in determining exit doses in vivo. Configured as a dosimeter, the system shows a linear response with good dynamic range. Its high spatial resolution was used to show that leaf positioning was reproducible to within 0.5 mm for all tested gantry and collimator angles. Our preliminary results from this exit dosimetry technique demonstrate that, under specific conditions, doses can be determined to within 2.5% of that measured using silicon diodes or ion chambers.
Affiliation:
North Western Medical Physics Department, Christie Hospital, Manchester, UK.
Citation:
Measurement possibilities using an electronic portal imaging device. 1993, 29 (2):237-43 Radiother Oncol
Journal:
Radiotherapy and Oncology
Issue Date:
Nov-1993
URI:
http://hdl.handle.net/10541/99599
DOI:
10.1016/0167-8140(93)90253-5
PubMed ID:
8310151
Type:
Article
Language:
en
ISSN:
0167-8140
Appears in Collections:
All Christie Publications

Full metadata record

DC FieldValue Language
dc.contributor.authorKirby, Mike Cen
dc.contributor.authorWilliams, Peter Cen
dc.date.accessioned2010-05-21T14:30:33Z-
dc.date.available2010-05-21T14:30:33Z-
dc.date.issued1993-11-
dc.identifier.citationMeasurement possibilities using an electronic portal imaging device. 1993, 29 (2):237-43 Radiother Oncolen
dc.identifier.issn0167-8140-
dc.identifier.pmid8310151-
dc.identifier.doi10.1016/0167-8140(93)90253-5-
dc.identifier.urihttp://hdl.handle.net/10541/99599-
dc.description.abstractA vital role in the quality control of radiotherapy is the use of portal imaging for verifying field size, shape, orientation and patient set-up. Coincidence of treated volume and target volume is imperative. Electronic portal imaging devices are effective at providing this verification. However, these devices are versatile enough to be used in other ways pertinent to the delivery of high quality, high precision radiotherapy. This paper examines two such ways: in assessing the reproducibility of a multileaf collimator system, and in determining exit doses in vivo. Configured as a dosimeter, the system shows a linear response with good dynamic range. Its high spatial resolution was used to show that leaf positioning was reproducible to within 0.5 mm for all tested gantry and collimator angles. Our preliminary results from this exit dosimetry technique demonstrate that, under specific conditions, doses can be determined to within 2.5% of that measured using silicon diodes or ion chambers.en
dc.language.isoenen
dc.subject.meshHumans-
dc.subject.meshRadiotherapy, Computer-Assisted-
dc.titleMeasurement possibilities using an electronic portal imaging device.en
dc.typeArticleen
dc.contributor.departmentNorth Western Medical Physics Department, Christie Hospital, Manchester, UK.en
dc.identifier.journalRadiotherapy and Oncologyen

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