Title :
CT image reconstruction on Intel Larrabee using half precision floating-point values
Author :
Maass, Clemens ; Baer, Matthias ; Kachelriess, Marc
Author_Institution :
Inst. of Med. Phys. (IMP), Univ. of Erlangen-Nurnberg, Erlangen, Germany
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
Computed tomography is a highly quantitative modality where the data values processed are of a high dynamic range and therefore computing CT images requires high accuracy and high precision during all processing steps. Nevertheless, memory bandwidth is one of the major bottlenecks in today´s reconstruction algorithms and it would speed up the reconstruction process to represent a datum with only 16 bit instead of 32 bit. Intel´s new Larrabee x86 architecture offers a promising processing of the half precision floating-point value that has the potential to be useful for CT image reconstruction. This study evaluates the image quality of CT image reconstruction based on such half values and compares the results to the standard case of using float values. Our findings are that it is possible to apply half precision data for rawdata and reconstructed volume if some conditions hold.
Keywords :
computerised tomography; image reconstruction; medical image processing; CT; Intel Larrabee; computed tomography; half precision floating-point values; image reconstruction; Bandwidth; Computed tomography; Computer architecture; Convolution; Dynamic range; Hardware; Image quality; Image reconstruction; Nuclear and plasma sciences; Reconstruction algorithms; CT Reconstruction; Fast Reconstruction; Image Quality; Larrabee;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5402423