Share Email Print
cover

Proceedings Paper

Hadamard multiplexing radiography based on carbon nanotube field emission multi-pixel x-ray technology
Author(s): J. Zhang; G. Yang; S. Chang; J. P. Lu; O. Zhou
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Currently all CT scanners collect the projection images sequentially, one at a time. The serial approach demands high x-ray power which in turn limits the scanning speed of the CT scanners. To overcome the limitations of the current CT scanners, the concept of stationary CT canners has been proposed to completely eliminate the need for gantry rotation. In such multi-pixel x-ray system, multiple x-ray sources and detectors are distributed around the scanning tunnel. Based on the multi-pixel x-ray system, we have recently demonstrated the feasibility of multiplexing radiography that enables simultaneous collection of multiple projection images through multiplexing. A drastic increase of the speed and reduction of the x-ray peak power can be potentially achieved without compromising the imaging quality. In this paper we demonstrated novel Hadamard multiplexing radiography based on Hadamard transform technique using a carbon nanotube based multi-pixel x-ray source. The combination of the multi-pixel x-ray and multiplexing technologies has the potential to lead to a new generation of stationary CT scanners that have drastically increased throughput at reduced cost.

Paper Details

Date Published: 25 March 2008
PDF: 8 pages
Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69131T (25 March 2008); doi: 10.1117/12.770860
Show Author Affiliations
J. Zhang, Univ. of North Carolina, Chapel Hill (United States)
G. Yang, Univ. of North Carolina, Chapel Hill (United States)
S. Chang, Univ. of North Carolina, Chapel Hill (United States)
J. P. Lu, Univ. of North Carolina, Chapel Hill (United States)
O. Zhou, Univ. of North Carolina, Chapel Hill (United States)


Published in SPIE Proceedings Vol. 6913:
Medical Imaging 2008: Physics of Medical Imaging
Jiang Hsieh; Ehsan Samei, Editor(s)

© SPIE. Terms of Use
Back to Top