Cone-beam mammo-computed tomography from data along two tilting arcs.
Over the past several years there has been an increasing interest in cone-beam computed tomography (CT) for breast imaging. In this article, we propose a new scheme for theoretically exact cone-beam mammo-CT and develop a corresponding Katsevich-type reconstruction algorithm. In our scheme, cone-beam scans are performed along two tilting arcs to collect a sufficient amount of information for exact reconstruction. In our algorithm, cone-beam data are filtered in a shift-invariant fashion and then weighted backprojected into the three-dimensional space for the final reconstruction. Our approach has several desirable features, including tolerance of axial data truncation, efficiency in sequential/parallel implementation, and accuracy for quantitative analysis. We also demonstrate the system performance and clinical utility of the proposed technique in numerical simulations.
Zeng
Kai
K
CT/Micro-CT Laboratory, Department of Radiology, University of Iowa, Iowa City, Iowa 52242, USA. kai-zeng@uiowa.edu
Yu
Hengyong
H
Fajardo
Laurie L
LL
Wang
Ge
G
D000465:Algorithms; D001940:Breast / Q000473:pathology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008327:Mammography / Q000379:methods*; D015233:Models, Statistical; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D011381:Programming Languages; D011857:Radiographic Image Interpretation, Computer-Assisted; D012984:Software; D036542:Tomography, Spiral Computed / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*