Intraoperative radiotherapy scanning path planning method and intraoperative radiotherapy system

Abstract

The invention relates to an intraoperative radiotherapy scanning path planning method and an intraoperative radiotherapy system. The intraoperative radiotherapy scanning path planning method comprises steps: multiple images of a to-be-scanned area are acquired through an auxiliary scanning assembly; based on the multiple images, a 3D model for the to-be-scanned area is built; based on the 3D model, an area for radiotherapy is determined; and a scanning path for the radiotherapy assembly is planned based on the area for radiotherapy. The intraoperative radiotherapy system comprises the auxiliary scanning assembly, an imaging assembly, the radiotherapy assembly, a mechanical arm and a control assembly, wherein the control assembly comprises a memory and a processor; and the processor is configured to operate a computer instruction stored in the memory so as to control the imaging assembly to scan the to-be-scanned area through the auxiliary scanning assembly to acquire multiple images, build the 3D model based on the multiple images, determine the area for radiotherapy based on the 3D model, plan the moving path for the radiotherapy assembly in view of the area for radiotherapy and control the mechanical arm and the area for radiotherapy assembly for radiotherapy processing.

Description

technical field [0001] The present application generally relates to the field of intraoperative radiotherapy, and more particularly, relates to a scanning path planning method for intraoperative radiotherapy and an intraoperative radiotherapy system. Background technique [0002] Intra-Operative Radiation Therapy (IORT) is a high-dose radiotherapy under direct vision for visible tumors, tumor bed areas or sites prone to recurrence and metastasis during surgery. The biggest advantage of this technique is that it can push some important organs close to the target area of ​​the patient (ie, the site to be irradiated) out of the radiation field under surgical conditions, thereby reducing their exposure dose. [0003] In the late 1990s, Hitesys S.P.A. of Italy and Intraop Medical Inc. of the United States successively launched a mobile intraoperative radiotherapy device named NOVAC7 (US Patent No. 5,635,721) and a movable electron linear accelerator named MOBETRON (US Patent No. ...

AI Technical Summary

Problems solved by technology

Although the device collects 3D images, it is determined by CT or MRI images before surgery, and the relationship between the surrounding normal tissues and important organs cannot be obtained when the tumor bed is exposed, and thus the optimal treatment plan cannot be determined.

[0005] The current treatment plan for IORT is decided by the radiologist based on experience within a short period of time after being on the operating table. Due to the lack of intraoperative 3D images and dose distribution information, it is impossible to evaluate the 3D dose of the irradiated tissue. The treatment parameters in the treatment plan (such as , treatment limits light tube size, angle, energy, etc.) Whether the correct choice depends largely on the doctor's experience level

This may lead to underdose of the target area or overdose of vital organs, affecting the effect of IORT

[0006] In addition, during clinical treatment, it takes a lot of work for a long time, such as manually placing the radiotherapy doctor, fixing the treatment light tube, and radiotherapy physicists manually controlling the handle to move the accelerator radiation head to align the central axis of the beam with the center axis of the light tube. After the IORT is started, it is difficult to guarantee the accuracy

At the same time, the radiotherapy implemented is a simple monoenergetic treatment with a fixed irradiation field. The electron beam with a single energy achieves a single-depth treatment, which cannot fully adapt to the shape of tumors with various depth distributions, resulting in the inability to better protect the normal tissues around the tumor.

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