Sparsity-constrained three-dimensional image reconstruction for C-arm angiography.
X-ray C-arm is an important imaging tool in interventional radiology, road-mapping and radiation therapy because it provides accurate descriptions of vascular anatomy and therapeutic end point. In common interventional radiology, the C-arm scanner produces a set of two-dimensional (2D) X-ray projection data obtained with a detector by rotating the scanner gantry around the patient. Unlike conventional fluoroscopic imaging, three-dimensional (3D) C-arm computed tomography (CT) provides more accurate cross-sectional images, which are helpful for therapy planning, guidance and evaluation in interventional radiology. However, 3D vascular imaging using the conventional C-arm fluoroscopy encounters some geometry challenges. Inspired by the theory of compressed sensing, we developed an image reconstruction algorithm for conventional angiography C-arm scanners. The main challenge in this image reconstruction problem is the projection data limitations. We consider a small number of views acquired from a short rotation orbit with offset scan geometry. The proposed method, called sparsity-constrained angiography (SCAN), is developed using the alternating direction method of multipliers, and the results obtained from simulated and real data are encouraging. SCAN algorithm provides a framework to generate 3D vascular images using the conventional C-arm scanners in lower cost than conventional 3D imaging scanners.
Image Science Laboratory, Department of Mathematics, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt. Electronic address: erashed@science.suez.edu.eg.
Essam A
EA
Rashed
Department of Radiology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt.
Mohammad
M
al-Shatouri
Division of Information Engineering, Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba 305-8573, Japan; JST, ERATO, Quantum-Beam Phase Imaging Project, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
Hiroyuki
H
Kudo
D000792:Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007680:Kidney Neoplasms / Q000098:blood supply* / Q000000981:diagnostic imaging*; D008297:Male; D014057:Tomography, X-Ray Computed / Q000379:methods*
ADMM; C-arm angiography; Computed tomography; Image reconstruction; Sparsity