Yissum Research Development Company of the Hebrew University of Jerusalem Ltd
发明人:
Leo JOSKOWICZ,Guy MEDAN
申请号：
US16545811
公开号：
US20200054295A1
申请日:
2019.08.20
申请国别(地区):
US
年份:
2020
代理人:
摘要：
There is provided a method of locating a tip of a metallic instrument inserted in a body, utilizing a baseline sinogram comprising projections in N exposure directions and derived from a prior computerized tomography (CT) scanning of the body, the method comprising: performing three-dimensional Radon space registration of a sparse repeat sinogram to the baseline sinogram, the repeat CT scanning having the metallic instrument inserted into the body, the metallic instrument having an attached marker located at a known distance from the instrument tip； subtracting the baseline sinogram from the repeat sinogram in accordance with the registration parameters to obtain projection difference images； and using the projection difference images and the known distance of the attached marker from the metallic instrument tip to determine a three-dimensional location of the metallic instrument tip.
