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dc.contributor.authorVahideh Nazari
dc.contributor.authorSeied R. Mahdavi
dc.contributor.authorAhmad Mostaar
dc.contributor.authorHassan Nedaei
dc.contributor.authorMohammad A.Mosleh Shirazi
dc.contributor.authorAlireza Nikoofar
dc.contributor.authorGolbarg Esmailie
dc.date.accessioned2017-09-18T11:00:33Z
dc.date.available2017-09-18T11:00:33Z
dc.date.issued2017-01-01
dc.identifier.issn22287477
dc.identifier.urihttp://dsp.sbmu.ac.ir/xmlui/handle/123456789/68598
dc.description.abstract© 2017 Journal of Medical Signals and Sensors. Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present study evaluates improvements of dosimetric properties of the low elbow camera-based EPID Theraview (Cablon Medical, Leusden, The Netherlands) equipped with a cooled charge coupled device (CCD) for portal dosimetry. The dose response, warm-up behavior, stability over long- A nd short-term scales (throughout a day) were studied. The field size dependency of the EPID response was also investigated and compared with ion chamber measurements under the same conditions. The EPID response without saturation for doses up to 2 Gy was linear for both beam qualities (6 and 15 MV). There was no evident warm-up characteristic. The detector sensitivity showed excellent stability in short term [standard deviation (SD) 0.38%]. In long-term stability (over a period of approximately 3 months), a negligible linear decline of 0.01% per day was observed. It was concluded that the cooled CCD camera-based EPID could be used for portal dosimetry, after accurate corrections for the field size dependency and sensitivity loss.
dc.sourceJournal of Medical Signals and Sensors
dc.subjectelbow
dc.subjectElectronic portal imaging devices
dc.subjectportal dosimetry
dc.subjectradiometry
dc.titleMulti-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry
dc.journal.volume7
dc.journal.issue1
dc.journal.pages21-25
dc.contributor.authorid57194495438
dc.contributor.authorid6603806138
dc.contributor.authorid35574302500
dc.contributor.authorid57191444594
dc.contributor.authorid48861696300
dc.contributor.authorid14120231200
dc.contributor.authorid57194502232
dc.contributor.citation57194495438|60024852|Vahideh Nazari
dc.contributor.citation6603806138|60024852|Seied R. Mahdavi
dc.contributor.citation35574302500|60018934|Ahmad Mostaar
dc.contributor.citation57191444594|60027708|Hassan Nedaei
dc.contributor.citation48861696300|60021948|Mohammad A.Mosleh Shirazi
dc.contributor.citation14120231200|60021948|Alireza Nikoofar
dc.contributor.citation57194502232|60024852|Golbarg Esmailie
dc.contributor.affiliationid60024852
dc.contributor.affiliationid60024852
dc.contributor.affiliationid60018934
dc.contributor.affiliationid60027708
dc.contributor.affiliationid60021948
dc.contributor.affiliationid60021948
dc.contributor.affiliationid60024852


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