| Abstract: | Helical Tomotherapy combines a form of intensity-modulated radiation therapy (IMRT) with the accuracy of computed tomography (CT) scanning technology in one machine. HT is one of the most advanced radiotherapy equipments at present. Considering the difference from the quality assurance of conventional linear accelerators, this guideline was proposed by National Cancer Center/National Cancer Quality Control Center, and multiple medical institutions participated in the formulation of this guideline. The guideline includes the acceptance items, operating rules and emergency plans, etc. The test methods, tolerances and frequencies of HT quality assurance are clarified. According to the actual situation of domestic medical institutions, the guideline provides recommended testing items, mainly including mechanical accuracy, dosimetric parameters, laser system, couch motion accuracy, MVCT imaging system quality control testing and clinical treatment plan verification, etc., making the guideline highly operable. This guideline can provide clinical phycicians with technical guidance on quality assurance, make quality assurance work rule-based, and improve the accuracy and precision of radiotherapy. It has instructive implications for medical institutions to establish standardized HT quality assurance system. |
