Title :
Cone-beam reconstruction for a C-arm CT system
Author :
Liu, Xuan ; Defrise, Michel ; Desbat, Larent ; Fleute, Matkus
Author_Institution :
Nuc. Med. Div., AZ-VUB, Laarbeeklaan, Belgium
Abstract :
Discusses reconstruction issues for a C-arm cone-beam CT system, intended for a medical integrated system for interventional procedures. Due to the speed requirement, data truncation and unstable orbit, we select a Feldkamp algorithm to reconstruct the cone beam projections. The aim of this study is to optimize the acquisition and to evaluate practical reconstruction algorithms. The studies are based on data generated by forward-projecting a set of fine-sampled volumetric CT data. We concentrate on evaluating: (1) artifacts caused by short-scan acquisition; (2) artifacts caused by the presence of metal objects, such as surgical screws and tools; (3) artifacts caused by data truncation in the transaxial direction; (4) possible image degradation caused by an unstable orbit.
Keywords :
computerised tomography; image reconstruction; medical image processing; surgery; C-arm CT system; Feldkamp algorithm; acquisition; artifacts; cone beam projections; cone-beam reconstruction; data truncation; fine-sampled volumetric CT data; forward-projection; image degradation; image-guided procedures; interventional procedures; medical integrated system; metal objects; reconstruction algorithms; short-scan acquisition; speed requirement; surgical acts; surgical screws; tools; transaxial direction; unstable orbit; Biomedical imaging; Bones; Computed tomography; Detectors; Image reconstruction; Infrared sensors; Optical imaging; Orthopedic surgery; Reconstruction algorithms; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1008620
