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SU‐GG‐T‐389: Clinical Implementation of Varian OBI and CBCT Using IMPAC Mosaiq R&V System
Author(s) -
Cardarelli G,
Hiatt J,
Corrao A,
GarciaCobian J,
Zheng Z,
Jang S,
Curran B,
Sternick E,
DiPetrillo T,
Wazer D
Publication year - 2008
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 - 10.1118/1.2962139
Subject(s) - linear particle accelerator , computer science , quality assurance , medical physics , nuclear medicine , computer hardware , medicine , beam (structure) , physics , optics , external quality assessment , pathology
Purpose: This report lists the necessary steps to install, commission, and implement on‐board imaging (OBI), and cone beam CT (CBCT) in a department with a LINAC and a competing‐vendor information system. Method and Materials: The Varian Trilogy is a multi‐use LINAC. This work will concentrate on the new treatment control module (4DTC). The 4DCT sequences the treatment fields, control of the MLC and the interface to both the OBI computer and the CBCT reconstructor. The record and verify system currently employed is the IMPAC MOSAIQ 4DT sequencer module. This unit receives the treatment parameters in DICOMRT format from the treatment planning system (TPS) and exports the information to the LINAC's 4DTC. The sequencer module then waits for the treatment to be completed and receives the final treatment data including images taken by the OBI. Results: The commissioning and implementation of the LINAC was performed in stages. The first stage was to collect all the necessary data to allow our 3 TPSs to properly calculate dose and send the correct parameters to the LINAC for treatment. The second stage included confirming that the OBI performed diagnostic quality x‐rays and that remote couch movements were accurately employed. The third and final stage was to verify the CBCT images could be transferred from the TPSs, registered, and prepared by MOSAIQ. After imaging, couch shifts are made to align the patient to their simulation CT and a screen capture is used to document the shifts. Since the CBCT data resides on the 4DTC, there is currently no mechanism to export it back into the MOSAIQ system. Conclusion: The Varian Trilogy LINAC with OBI and CBCT was successfully implemented using IMPAC MOSAIQ information system in a semi‐chart‐less and filmless department.