C-arm computerized tomography system

摘要

A system and method for generating CT-type three dimensional imaging information from a conventional C-arm fluoroscope system. This enables the adaptation of widely used C-arm installations to provide CT-type information. The system uses a three dimensional target disposing in a fixed position relative to the subject, and obtains a sequence of video images of a region of interest of a subject while the C-arm is moved manually or by a scanning motor. Images from the video sequence are analyzed to determine the pose of the C-arm relative to the subject by analysis of the image patterns of the target. Images are selected from the video sequence according to predetermined criteria. A set of two-dimensional image data with associated positional data is obtained, which is used to reconstruct a three dimensional volumetric set of imaging data of the region of interest of the subject.

主权项

1. A method of using a C-arm X-ray fluoroscopic two dimensional imaging system for generating a volumetric set of imaging data, comprising the steps of:
providing an X-ray fluoroscopic two dimensional imaging system having a source and a camera connected by a C-arm, said system imaging a region of interest of a subject disposed between said source and said camera; disposing a target having a series of X-ray opaque markers disposed in a three dimensional pattern, in a fixed position relative to the subject, and where at least part of the target will be imaged by said X-ray imaging system; manually applying a motion path to said C-arm; obtaining from said camera a sequence of video images of said region of interest of the subject while said C-arm performs said motion path; determining a pose of said C-arm relative to the subject for at least some of said sequence of video images by analyzing image patterns of said target; selecting a number of video images from said sequence of video images; and using said selected video images and their determined poses to reconstruct a three-dimensional volumetric set of imaging data of said region of interest of the subject.