Page 67 of Radiation Medicine QA Solutions 2008/2009 by PTW

radiation therapy quality control equipment verisoft® verification software multicheck linac qc software imrt plan verification software software program to check the consistent performance of linear accelerators by using ptw 2d ion chamber arrays features suitable for fast and easy daily constancy tests of photon and electron beams from linacs using ptw 2d arrays checks flatness symmetry dose deviation in the central axes wedge angle of dynamic virtual and fixed wedges as well as the congruency of light and radiation fields checks beam quality with bq-check phantom compares all parameters to a reference data record and displays deviations enables tracking parameters via a statistic function creates a comprehensive data analysis according to selectable dosimetry protocols and the protocols of the accelerator manufacturers provides snapshoot mode for fast checking of the beam multicheck is a windows based software for fast and easy-to-handle routine constancy tests of high-energy photon and electron beams from linear accelerators reference files for different accelerators and different beam parameters can be defined multicheck is based on two-dimensional dose measurements by the 2d flat panel arrays 2d-array seven29 and starcheck by evaluating the dose matrices the relevant linac quality parameters are compared to original reference values which are stored together with tolerance thresholds measuring results parameter variations and tolerance excesses are presented in either numeric or graphic format the progress of test results combined with statistical evaluations is shown profiles can be analyzed after different protocols with the bq-check phantom placed on the 2d-array seven29 or starcheck the beam quality can be checked without additional measurements the software offers air density correction of the ion chamber measuring values the data can be exported to excel sheets for further evaluation features verifies imrt treatment plans compares any two data records from planning systems 2d-array seven29 or film provides comprehensive data evaluation routines with gamma index analyses and traffic light function for fast checking enables overlaid isodose display contains list function for importing several fields the microsoft windows software verisoft 1 helps the medical physics expert to verify the imrt treatment plan by comparing data measured in an imrt verification phantom with data computed for the same phantom by a radiotherapy treatment planning system matrices of measured and calculated points of an imrt beam are read and displayed by verisoft isodoses profiles and numerical values can be compared verisoft features several display modes verisoft offers different ways to evaluate the deviation between treatment plan and measured beam including the gamma index method verisoft reads calculated dose matrices from all major radiation therapy planning systems dicom or own data formats as well as all customary image formats four fields acquired with the 2d-array seven29 can be merged to a complete field without any gaps using the software tool merge seven29 which is part of the verisoft software package to acquire 2d measuring matrices for the evaluation by the verisoft software a beam data acquisition system is required therapy beam analyzer 2d-array seven29 or film digitizer with tiff format 1 verisoft was designed in cooperation with tilo wiezorek from friedrich-schiller university jena germany ordering information s070011 multicheck software 2d-array seven29 page 65 starcheck page 64 bq-check page 66 ordering information s070009 verisoft software imrt verification phantoms pages 69 to 71 67

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