Isocentric analysis method, device, computer equipment and medium for radiotherapy equipment

Abstract

The embodiment of the invention discloses an isocentric analysis method, a device, computer equipment and a medium for radiotherapy equipment. The method comprises the steps: obtaining projection images of a detected die body in different beam outgoing states of radiotherapy equipment, and enabling the projection image in each beam outgoing state to be photographed at at least three rack angles ofthe radiotherapy equipment; determining a projection matrix corresponding to each rack angle in each beam outlet state according to preset characteristics of the detected die body and the projectionimage; and based on the mechanical isocenter point of the radiotherapy equipment, the projection matrix corresponding to each beam-out state and the radiation field center point of the projection image, determining the position offset range of the beam isocenter point and / or the beam isocenter point in each beam-out state, thereby determining the position offset difference between the beam isocenter points in different beam-out states. The problem that beam isocenter points of radiotherapy equipment in different beam outlet states cannot be ensured to be consistent in the prior art is solved.

Description

technical field [0001] Embodiments of the present invention relate to the field of medical equipment, and in particular, to an isocentric analysis method, device, computer equipment, and medium for radiotherapy equipment. Background technique [0002] In radiotherapy, the isocenter accuracy of radiotherapy equipment plays a crucial role in radiotherapy results, especially for stereotactic radiosurgery (SRS) and image-guided radiotherapy (Image Guided Radiation Therapy, referred to as IGRT). [0003] In order to improve the accuracy of radiotherapy, it is usually necessary to regularly check the accuracy of the beam isocenter of radiotherapy equipment. At present, the beam isocenter position of radiotherapy equipment in the treatment mode is generally only measured by film. Due to the poor imaging quality of the film and the offset range of the isocenter point can only be obtained on the two-dimensional plane, the measurement results are inaccurate, resulting in inaccurate m...

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Problems solved by technology

[0005] Embodiments of the present invention provide a radiotherapy equipment isocenter analysis method, device, computer equipment and media to solve the problem that the isocenter analysis method of radiotherapy equipment in the prior art cannot guarantee the beam isocenter of radiotherapy equipment in different beam output states. point is consistent

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