IMRT-application with an add-on MMLC.
In order to provide automatic IMRT dose delivery with an add-on MMLC a technical integration of a MMLC system with a linear accelerator was realized. The principle of this integration and the changes and enhancements of the existing hard- and software are briefly described. The system was tested by the automatic delivery of an IMRT plan designed for a head and neck phantom. A verification of dose delivery was performed with film dosimetry. The plan consisting of 78 "step and shoot" segments could be delivered within 17 minutes. A high spatial accuracy of the fluence pattern at the isocentre was reached by a resolution of 2.75x2.75 mm(2). The measured dose profiles were within 3% of the maximum dose of the calculated profiles.
Tücking
Thomas
T
Department of Medical Physics, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany. t.tuecking@dkfz.de
Nill
Simeon
S
Oelfke
Uwe
U
D006801:Humans; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods; D011881:Radiotherapy, Computer-Assisted / Q000295:instrumentation / Q000379:methods / Q000639:trends; D020266:Radiotherapy, Conformal / Q000295:instrumentation* / Q000379:methods / Q000639:trends*; D012984:Software / Q000639:trends