Abstract
Introduction In a new radiotherapy center, with multi-modality linear accelerator, the quality control (QC) procedure becomes more complicated and more time consuming. Pylinac is a free software provides TG-142 QC tools. Purpose Is to evaluate the safe use of the software and accuracy in analyzing the QC tests. Materials and methods Pylinac (//github.com/jrkerns/pylinac) contains 8 high-level modules for automatically analyzing images and data generated by linear accelerator. we have tested 4 modules which are star-shot, VMAT, picket fence and CBCT module. It use either scanned film images, EPID or CBCT DICOM images. The software process the images and performs all measurements required by the QC protocol, then the results were compared with results from the standard analysis method Results Current QC procedure is based on visual observation of certain features in acquired images and be able to detect any deviation, such as MLC position or isocenter position. This approach is also a subjective task as it depends on the person who is performing the analysis. Using Pylinac software gives a superior result compared with the routine analysis way as it gives the result in sub millimeter for the star-shot and the picket-fence tests. In the VMAT test the software has the ability to analyze the whole image, rather than performing the test on specific positions on the image. Conclusion The software was able to perform all the tests and detect any deviation with the same accuracy as manual method, also it performs the analysis in a significantly shorter time. Disclosure We have nothing to disclose in relation to the presented work. In a new radiotherapy center, with multi-modality linear accelerator, the quality control (QC) procedure becomes more complicated and more time consuming. Pylinac is a free software provides TG-142 QC tools. Is to evaluate the safe use of the software and accuracy in analyzing the QC tests. Pylinac (//github.com/jrkerns/pylinac) contains 8 high-level modules for automatically analyzing images and data generated by linear accelerator. we have tested 4 modules which are star-shot, VMAT, picket fence and CBCT module. It use either scanned film images, EPID or CBCT DICOM images. The software process the images and performs all measurements required by the QC protocol, then the results were compared with results from the standard analysis method Current QC procedure is based on visual observation of certain features in acquired images and be able to detect any deviation, such as MLC position or isocenter position. This approach is also a subjective task as it depends on the person who is performing the analysis. Using Pylinac software gives a superior result compared with the routine analysis way as it gives the result in sub millimeter for the star-shot and the picket-fence tests. In the VMAT test the software has the ability to analyze the whole image, rather than performing the test on specific positions on the image. The software was able to perform all the tests and detect any deviation with the same accuracy as manual method, also it performs the analysis in a significantly shorter time.
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