Interventional planning navigation system based on CT-MRI fusion and navigation method thereof

Abstract

The invention discloses an interventional planning navigation system based on CT- MRI fusion and a navigation method thereof. The system comprises: a preoperative planning module that segments a prostate region and an urethra from a MRI image, marks a suspicious lesion region, and then constructs a three-dimensional structure, and finally plans an optimal puncture path; a spatial positioning module that is used to complete spatial registration of a CT image and the MRI image of a patient and obtains a transformation matrix from magnetic locator space and a CT image space; a puncture guiding module that is used to obtain a position and a posture of a puncture needle, so as to guide travel of the puncture needle. The interventional planning navigation system of the invention facilitates to locate a suspicious lesion without changing CT guidance by combining imaging advantages of the CT and the MRI, thereby specifying a target area of diagnosis and treatment, and improving accuracy of prostate interventional surgery; and fully combines multimodal medical image information, a spatial positioning technology and a three-dimensional visualization technology to make guidance to operation more intuitive and to improve convenience of prostate interventional surgery.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a CT-MRI fusion-based intervention planning navigation system and a navigation method thereof. Background technique [0002] Prostate cancer is one of the most common malignant tumors of the male genitourinary system. With the changes in people's living habits and eating habits, the incidence of prostate cancer in my country has increased rapidly in recent years. The effect of curative treatment on early prostate cancer is better, so early diagnosis and early treatment of prostate cancer are very important. [0003] Interventional surgery has played an important role in the diagnosis and treatment of prostate cancer, such as biopsy, seed implantation and cryoablation. Compared with ultrasound guidance, CT guidance is more objective, but CT has limited resolution of soft tissue organs, resulting in blurred borders between the prostate and surrounding tissues. More importantly, ...

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Problems solved by technology

Compared with ultrasound guidance, CT guidance is more objective, but CT has limited resolution of soft tissue organs, resulting in blurred borders between the prostate and surrounding tissues. More importantly, except for calcification in the prostate, other types of lesions are not easy to detect on CT. Appears in the middle, causing difficulties for precise prostate interventional surgery

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