Surgical navigation simulation method based on electromagnetic positioning technology and intraoperative image guidance

Abstract

The invention relates to a surgical navigation simulation method based on an electromagnetic positioning technology and intraoperative image guidance. The surgical navigation simulation method comprises the steps that 1, a preoperatively shot CT image of a patient is obtained; 2, the preoperatively shot CT image of the patient is reconstructed into a three-dimensional CT model; 3, registration andvisualization of surgical instruments are achieved; 4, the electromagnetic positioning technology is utilized to achieve real-time tracing of the surgical instruments under an image coordinate system; 5, an ultrasonic probe is calibrated, an ultrasonic image is obtained during operation in real time, and preliminary fusion between the three-dimensional CT model and the ultrasonic image is achieved; 6, by utilizing grey information and characteristic information of the ultrasonic image and adopting a mutual information method and an automatic SIFT characteristic extraction method, real-time registering of the preoperative three-dimensional CT model and the intraoperative ultrasonic image in the surgical process is performed; 7, simulation control of surgical robot movements is achieved. Compared with the prior art, the surgical navigation simulation method has the advantages of high navigation precision, low calculation complexity, good stability and reliability, convenient achievement, low cost, good clinic applicability and the like.

Description

technical field [0001] The present invention relates to the simulation technology of virtual surgery, in particular to a surgical navigation simulation method based on electromagnetic positioning technology and intraoperative image guidance. Background technique [0002] Thoracotomy and laparotomy for resection of aortic aneurysm are the traditional methods for treating aortic aneurysm. However, due to the large surgical wound and complex visceral artery reconstruction, patients often suffer from excessive blood loss, shock, visceral injury, and cardiac arrest during the operation. This phenomenon greatly increases the risk of the operation, and is not conducive to the postoperative recovery of the patient, and may even lead to paraplegia due to the interruption of the blood supply of the spinal cord artery during the operation. Therefore, minimally invasive surgery represented by transcatheter cardiovascular stent-graft interventional surgery has gradually become the mainst...

AI Technical Summary

Problems solved by technology

Although this method can obtain real-time and relatively clear image information, patients and doctors need to be exposed to X-ray radiation for a long time, and patients need to be injected with a large amount of contrast agent that can damage the kidneys, which may have a negative impact on patients and doctors. It poses a huge hazard to health. At the same time, because X-ray imaging can only provide two-dimensional image information, it cannot visualize the three-dimensional information of the surgical target area, which directly affects the reliability of intraoperative guidance.

[0003] Therefore, how to improve the traditional intraoperative guidance method can not only retain the advantages of intraoperative guidance for minimally invasive surgery, but also eliminate the shortcomings of traditional X-ray guidance, such as insufficient information and large additional damage, and improve the success rate of cardiovascular interventional surgery. Significant research significance, at the same time the application of virtual surgery provides more and more help for the modernization of medical care

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