Computed tomography simulation with superquadrics.
Accurate and efficient simulation of an x-ray transform for representative structures plays an important role in research and development of x-ray CT, for the evaluation and improvement of CT image reconstruction algorithms, in particular. Superquadrics are a family of three-dimensional objects, which can be used to model a variety of anatomical structures. In this paper, we propose an algorithm for the computation of x-ray transforms for superellipsoids and tori with a monochromatic x-ray. Their usefulness is demonstrated by projection and reconstruction of a superquadric-based thorax phantom. Our work indicates that superquadric modeling provides a more realistic visualization than quadratic modeling, and a faster computation than spline methods.
Zhu
Jiehua
J
Department of Mathematical Sciences, Georgia Southern University, Statesboro, Georgia 30460, USA. jzhu@GeorgiaSouthern.edu
Zhao
Shiying
S
Ye
Yangbo
Y
Wang
Ge
G
D000465:Algorithms; D003198:Computer Simulation; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008954:Models, Biological; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*