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SU‐FF‐T‐281: In Vivo Dosimtery for IMRT Treatments Generated by Pinnacle Treatment Planning System
Author(s) -
Alaei P,
Higgins P,
Gerbi B
Publication year - 2006
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2241199
Subject(s) - pinnacle , radiation treatment planning , imaging phantom , dosimetry , eclipse , nuclear medicine , radiation therapy , medicine , medical physics , surgery , physics , astronomy
Dose verification using diodes has recently been proposed for IMRT treatments and has been evaluated for IMRT deliveries planned using the Eclipse treatment planning system. The Pinnacle treatment planning system generates plans that are delivered in a different fashion than Eclipse. Whereas the Eclipse‐generated plans are delivered by scanning the treatment area from one side to the other, Pinnacle‐generated plans are delivered in a seemingly random fashion, treating multiple small areas within the field. This makes diode measurements at a point potentially more uncertain since the diode may be exposed fully or partially to multiple small fields during one single field's treatment as opposed to being exposed to very few segments scanning the point during an Eclipse‐generated delivery. We have evaluated in vivo dosimtery for Pinnacle‐generated IMRT plans, characterized diode response to IMRT deliveries involving various beamlets and evaluated its response due to full or partial exposure to radiation. We will also present the results of diode measurements performed for 150 IMRT fields on patient and phantom.