Title :
Speedup OS-EM image reconstruction by PC graphics card technologies for quantitative SPECT with varying focal-length fan-beam collimation
Author :
Wang, Zigang ; Han, Guoping ; Li, Tianfang ; Liang, Zhengrong
Author_Institution :
Dept. of Radiol., State Univ. of New York, Stony Brook, NY, USA
Abstract :
In this paper, we present a new hardware acceleration method to speedup the ordered-subsets expectation-maximization (OS-EM) algorithm for quantitative single photon emission computed tomography (SPECT) image reconstruction with varying focal-length fan-beam (VFF) collimation. By utilizing the geometrical symmetry of VFF point-spread function (PSF), compensation for object-specific attenuation and system-specific PSF are accelerated using currently available PC video/graphics card technologies. A tenfold acceleration of quantitative SPECT reconstruction is achieved.
Keywords :
image reconstruction; medical image processing; optical transfer function; single photon emission computed tomography; SPECT reconstruction; focal-length fan-beam collimation; geometrical symmetry; graphics card technologies; hardware acceleration method; image reconstruction; object-specific attenuation; ordered-subsets expectation-maximization algorithm; point-spread function; quantitative single photon emission computed tomography; Acceleration; Attenuation; Computed tomography; Computer graphics; Geometry; Hardware; Image reconstruction; Optical collimators; Radiology; Single photon emission computed tomography; Ordered-subsets expectation-maximization (OS-EM) reconstruction; PC hardware-based acceleration; single photon emission computed tomography (SPECT); varying focal-length fan-beam collimation;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2005.858231
