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dc.contributor.authorKirby, Mike C
dc.contributor.authorKane, B
dc.contributor.authorWilliams, Peter C
dc.date.accessioned2010-05-14T09:56:57Z
dc.date.available2010-05-14T09:56:57Z
dc.date.issued1995
dc.identifier.citationClinical applications of composite and realtime megavoltage imaging. 1995, 7 (5):308-16 Clin Oncolen
dc.identifier.issn0936-6555
dc.identifier.pmid8580057
dc.identifier.doi10.1016/S0936-6555(05)80539-4
dc.identifier.urihttp://hdl.handle.net/10541/98836
dc.description.abstractThe versatility of electronic portal imaging devices (EPIDs) is best demonstrated by their ability to perform novel megavoltage imaging protocols, which are still pertinent to good radiotherapy practice. This paper examines two such techniques: composite and realtime imaging. Our EPID can be programmed to acquire and manipulate images very easily, allowing images from segmented treatment protocols to be mixed and displayed, giving a composite image of the effective treatment result. Its use for verifying the efficacy of spinal shielding using a segmented, offset collimator technique is described. By acquiring images very quickly, realtime imaging sequences can be obtained and used to analyse anatomical movement within a single treatment field. The technique is employed here to investigate movement in radical lung, breast, abdomen, pelvis and thyroid treatments. Our results show that the protocol is vital for treatment sites involving the lungs; changes up to 5 mm have been observed in the maximum lung depth for breast treatments, and displacements up to 16 mm for radical lung treatments. It is also useful in other anatomical sites for ensuring that no movement occurs.
dc.language.isoenen
dc.subject.meshFluoroscopy
dc.subject.meshHumans
dc.subject.meshImage Processing, Computer-Assisted
dc.subject.meshRadiotherapy, Computer-Assisted
dc.subject.meshRadiotherapy, High-Energy
dc.subject.meshSpine
dc.titleClinical applications of composite and realtime megavoltage imaging.en
dc.typeArticleen
dc.contributor.departmentNorth Western Medical Physics Department, Christie Hospital, Manchester, UK.en
dc.identifier.journalClinical Oncologyen
html.description.abstractThe versatility of electronic portal imaging devices (EPIDs) is best demonstrated by their ability to perform novel megavoltage imaging protocols, which are still pertinent to good radiotherapy practice. This paper examines two such techniques: composite and realtime imaging. Our EPID can be programmed to acquire and manipulate images very easily, allowing images from segmented treatment protocols to be mixed and displayed, giving a composite image of the effective treatment result. Its use for verifying the efficacy of spinal shielding using a segmented, offset collimator technique is described. By acquiring images very quickly, realtime imaging sequences can be obtained and used to analyse anatomical movement within a single treatment field. The technique is employed here to investigate movement in radical lung, breast, abdomen, pelvis and thyroid treatments. Our results show that the protocol is vital for treatment sites involving the lungs; changes up to 5 mm have been observed in the maximum lung depth for breast treatments, and displacements up to 16 mm for radical lung treatments. It is also useful in other anatomical sites for ensuring that no movement occurs.


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