X-ray micro-CT with a displaced detector array: application to helical cone-beam reconstruction.
In x-ray micro-CT applications, it is useful to increase the field of view by offsetting a two-dimensional (2D) detector array. In this technical note, we briefly review the methods for image reconstruction with an asymmetric 2D detector array, elaborate on the use of an associated weighting scheme in the case of helical/spiral cone-beam scanning, and perform a series of numerical tests to demonstrate helical cone-beam image reconstruction with such an arrangement.
CT/Micro-CT Lab, Department of Radiology, University of Iowa, Iowa City, Iowa 52242, USA.
Vinson
V
Liu
Nicholas R
NR
Lariviere
Ge
G
Wang
D000465:Algorithms; D003198:Computer Simulation; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods*; D014965:X-Rays