Method for real-time error correction of neurosurgery navigation puncture path based on near infrared spectrum

Abstract

The invention discloses a method for real-time error correction of a neurosurgery navigation puncture path based on a near infrared spectrum, which belongs to a precision correction method of a surgical navigation system. The method comprises the following steps: firstly, extracting guidance information of a target path based on body data of a three-dimensional reconstruction body; secondly, coning the target path and extracting N pieces of guidance information for verifying puncture tracks on the conical surface; and thirdly, obtaining the target path and N optical curves for verifying the tracks according to optical parameters and a mathematical correlation model of image data, in virtue of a curvilinear trend matching algorithm of Hausdorff distance and curvature, obtaining a puncture track curve having the same variation tendency as a real-time near infrared optical signal in a tolerance range, determining a direction offsetting from the target path, calculating coordinate offset, performing real-time path correction, and guiding an operation. The method can be implemented simply at a quick speed, can be performed in real time, is convenient for clinical application and can be integrated in the surgical navigation system, thus the precision of the navigation system is greatly improved.

Description

technical field [0001] The invention belongs to the fields of medical image processing, biomedical photonics and applications, and relates to a precision correction method for a surgical navigation system, specifically to a real-time error correction method for neurosurgery navigation puncture paths based on near-infrared spectrum Background technique [0002] In the neurosurgery navigation system, the inability to correct the brain tissue displacement caused by the release of cerebrospinal fluid, brain tissue traction, and body position changes is an important factor affecting the accuracy of the neurosurgery navigation system. How to correct the deviation between the actual puncture path and the planned surgical path caused by brain tissue displacement in real time during the operation is a long-standing and challenging clinical medical problem for the neurosurgery navigation system. At present, the most ideal way to solve brain tissue displacement is to use low-field de...

AI Technical Summary

Problems solved by technology

Microelectrodes record cell discharge characteristics, which can achieve anatomical and functional dual positioning, and effectively avoid damage to important structures such as the internal capsule and optic tract around the target. The disadvantage is that clinicians rely on experience to determine signal characteristics, and there is no quantitative identification parameter. The judgment made by the screen and sound lacks absolute trust. In addition, this method has many needles and will cause other complications.

Ultrasound can correct intraoperative displacement and reduce the error of the navigation system, but it is difficult to identify nuclei below 1 cm in ultrasound images, and it is also difficult to distinguish white matter and gray matter with a small difference in acoustic impedance

Images