Automatic sketching method and device for lumbosacral nerve roots and storage medium

Abstract

The invention discloses an automatic sketching method and device for lumbosacral nerve roots and a storage medium, and relates to the stereotactic body radiotherapy technology, and the method comprises the steps: obtaining a plurality of belly and pelvic CT images, obtained in a CT examination mode, of target radiotherapy patients from a database, and taking the belly and pelvic CT images as first images; images with clear lumbosacral nerve root deformation of the multiple target radiotherapy patients obtained in other examination modes are obtained from the database and serve as second images; correcting the first image by using the second image to obtain a CT image with clear lumbosacral nerve root deformation, and taking the CT image as a third image; an abdominal and pelvic CT image, obtained in a CT examination mode, of the patient to be subjected to radiotherapy is obtained and serves as a fourth image; and processing the fourth image of the patient to be subjected to radiotherapy by using an automatic sketching model obtained by training the first image and the third image to obtain a sketched lumbosacral nerve root deformation CT image of the patient to be subjected to radiotherapy. According to the method, the defects that the consistency is poor and learning is difficult when the lumbosacral nerve root deformation is artificially sketched on the CT plain scanning image can be overcome, the nerve root deformation is clearer compared with that of CT imaging, and the price and the requirement are lower compared with that of MRI imaging.

Description

technical field [0001] The invention relates to stereotactic body radiation therapy (SBRT), in particular to an automatic delineation method, equipment and storage medium for lumbosacral nerve roots. Background technique [0002] SBRT is a high-precision radiotherapy technique that is widely used in clinical practice. With the continuous promotion of stereotactic ablative radiotherapy (SABR) technology, high-dose irradiation of tumors close to the lumbar plexus (eg, kidney cancer) and sciatic nerve (eg, lower extremity metastases) is widely used in clinical practice. also become more frequent. Lack of accurate delineation of the lumbosacral nerves before treatment may easily lead to different degrees of nerve damage after radiotherapy, such as radiation-induced lumbosacral plexopathy (RILSP), which is mainly manifested in different degrees of neurological deficits. Lower limb pain, numbness, weakness, and even paralysis in severe cases. In the vast majority of RILSP cases...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an automatic delineation method, equipment and storage medium for lumbosacral nerve roots, aiming to solve the problem of poor consistency and difficult learning in the manual delineation method based on CT imaging results in traditional abdominal and pelvic stereotactic radiotherapy. However, stereotactic radiotherapy under MR guidance is expensive, has many contraindications, and requires relatively high requirements for venues and patients' physical fitness.

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