Title :
A Simple Method to Calibrate Projection Matrix of C-Arm Cone-Beam CT
Author :
Jia, Fucang ; Li, Yuan ; Xu, Hongwei ; Zhang, Xiaodong ; Hu, Qingmao
Abstract :
Cone-Beam CT is a popular intra-operative 3D imaging in orthopaedic surgery. CBCT 3D imaging is based on precise isocenter movement of C-arm. Low-end C-arm X-ray machines generally do not satisfy this requirement. In this paper a simple method based on dedicated phantom and compute vision principle is given. The phantom is designed so that its projection onto images is unique and can be easily detected, the detected markers in image are then transformed to iso-center image. In this way, when patient body is scanned with this phantom, 3D image can be get by popular CBCT image reconstruction method. Experiments show that the precision is small enough for image guided surgery.
Keywords :
image reconstruction; matrix algebra; medical image processing; object detection; orthopaedics; C-arm cone-beam CT; CBCT 3D imaging; compute vision principle; image guided surgery; image reconstruction method; intra-operative 3D imaging; isocenter movement; low-end C-arm X-ray machines; marker detection; orthopaedic surgery; patient body; phantom principle; projection matrix calibration; Calibration; Cameras; Image reconstruction; Phantoms; Surgery; Transforms; X-ray imaging; CBCT; calibration; iso-center transform; phantom; project matrix;
Conference_Titel :
Biomedical Engineering and Biotechnology (iCBEB), 2012 International Conference on
Conference_Location :
Macau, Macao
Print_ISBN :
978-1-4577-1987-5
DOI :
10.1109/iCBEB.2012.41
