Patent ID: 8666476

Claim:
A surgery assistance system comprising: a surgical instrument having a marker part and a front end configured for insertion into a patient; a three-dimensional surface shape scanner that measures three-dimensional surface shape of a patient and acquires three-dimensional surface shape data, wherein the three-dimensional surface shape data includes a three-dimensional position of the marker part, and a computing device that processes the data from the three-dimensional surface shape scanner, wherein three-dimensional internal shape data of the patient that is acquired in advance by measurement using a three-dimensional tomography scanner is stored in the computing device, and the computing device includes a unit that extracts data of a portion where a distance between a skeleton and a skin surface is small and includes a portion of a face excluding a nasal portion and an ocular portion from the three-dimensional internal shape data, a unit that calculates a coordinate conversion factor by detecting three-dimensional surface shape data corresponding to the extracted three-dimensional internal shape data by matching from three-dimensional surface shape data acquired by the three-dimensional surface shape scanner, and a unit that aligns the three-dimensional internal shape data and the three-dimensional surface shape data with each other by using the calculated coordinate conversion factor; wherein the computing device provides a real-time position of the surgical instrument front end in the patient even when the patient position and patient surface shape changes during a surgery.