Accelerator-based energy spectrum computed tomography (CT) implementation method and device and radiotherapy equipment

Abstract

The invention discloses an accelerator-based energy spectrum computed tomography (CT) implementation method and device and radiotherapy equipment. The energy spectrum CT implementation method comprises the following steps: S1, CT scanning parameter information of a patient is received, and an accelerator rotating rack and a treatment bed are moved to preset initial positions; S2, the rack is enabled to start to rotate, the treatment bed cooperates to correspondingly move a patient, meanwhile, an energy spectrum CT control unit enables an MV-level imaging system and a kV-level imaging system to carry out portal imaging and records rack angle information and treatment bed position information at the moment, and all dual-energy projection images and corresponding angle information of the patient are obtained; S3, image registration is performed on the dual-energy projection image; S4, a two-dimensional projection image of the material coefficient of the patient is solved; S5, a three-dimensional image of the material coefficient of the patient is reconstructed; and S6, various functional images are calculated and displayed. According to the invention, by adding the energy spectrum CT control unit and the corresponding control method, the purpose of realizing the energy spectrum CT is achieved.

Description

technical field [0001] The invention belongs to the technical field of accelerator radiation therapy, and in particular relates to an accelerator-based energy spectrum CT realization method, device and radiation therapy equipment. Background technique [0002] Spectral CT is a relatively high-end CT imaging method in recent years. It is an inspection method that uses substances to produce different absorptions of different energy X-rays. Carrying out CT scanning, using the difference of the X-ray attenuation value produced by the scanned material under different X-ray energy conditions, positioning and imaging the scanned material in the two-dimensional energy space, can more accurately solve the problem of the scanned material The distribution of electron density and equivalent atomic number, the qualitative and quantitative analysis of substances, and the identification and resolution of substances based on the obtained results can provide more information than conventiona...

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Problems solved by technology

[0004]Although medical linear accelerators are equipped with CT imaging devices using kV-level and MV-level x-rays with different energies, these two sets of CT imaging devices are independent of each other Two sets of imaging systems, each of which uses a single ray source for conventional cone-beam CT imaging. The image data obtain

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