Medical system providing dynamic registration of a model of an anatomical structure for image-guided surgery

摘要

A medical system provides navigation assistance to a surgeon so that the surgeon may navigate a flexible medical device through linked passages of an anatomical structure to a target in or adjacent to the anatomical structure. As the medical device moves through the linked passages, images are captured by an image capturing element at its distal end and pose and shape information for the medical device are received from sensors disposed in the medical device. A 4-D computer model of the anatomical structure is registered to the medical device using one or both of 4-D shape registration and virtual camera registration so that the captured image and a virtual image generated from the perspective of a virtual camera are registered to each other and displayed while providing an indication of a navigational path to the target.

主权项

1. A medical system comprising:
a memory storing information of a four-dimensional computer model of an anatomical structure of a patient, wherein the four-dimensional computer model includes information of a plurality of three-dimensional computer models of the anatomical structure of the patient, wherein each of the plurality of three-dimensional computer models is for a different point in time than others of the plurality of three-dimensional computer models so that the fourth dimension is time, wherein the plurality of three-dimensional computer models indicate movement of the anatomical structure, wherein each of the plurality of three-dimensional computer models defines a plurality of passages, and wherein each of the plurality of passages has a shape; a medical device having a flexible body and a plurality of sensors distributed along the length of the flexible body; and a processor programmed to determine the pose and shape of the flexible body while disposed in a passage of the anatomical structure using information provided by the plurality of sensors at the same point in time and register the medical device to the four-dimensional computer model of the anatomical structure by matching at least the determined shape of the flexible body to a best fitting one of the shapes of one or more potential passages in the four-dimensional computer model of the anatomical structure.