DocumentCode :
374834
Title :
Partial scan weighting algorithms with applications to arbitrary pitch selection in multislice CT and cardiac CT sector reconstruction
Author :
Besson, Guy M. ; Ma, Pei-hsun
Author_Institution :
Lab. of Appl. Sci., Gen. Electr. Med. Syst., Milwaukee, WI, USA
Volume :
2
fYear :
2000
fDate :
2000
Abstract :
Partial scan weighting algorithm provides a simple mathematical artifice that transforms the half-scan (HS1)/segment weights into helical weights and vice versa. It allows reconstruction from any set of projection larger or equal to the minimum required for half-scan reconstruction, up to a full rotation. Two major applications are described in this paper. In considering patient dose and image noise, the partial scan algorithm will be useful in cardiac imaging with constraints of continuous range of patient cardiac motion and the fixed number of scanner rotation speeds. Secondly, partial scan weighting allows fan-beam helical reconstruction for any pitch between HQ2 and HS modes without wasting patient dose or distorting the slice sensitivity profile
Keywords :
cardiology; computerised tomography; dosimetry; image reconstruction; medical image processing; arbitrary pitch selection; cardiac CT sector reconstruction; cardiac imaging; fan-beam helical reconstruction; fixed number; full rotation; half-scan reconstruction; half-scan segment weights; helical weights; image noise; multislice CT; partial scan weighting algorithms; patient cardiac motion; patient dose; projection; reconstruction; scanner rotation speeds; simple mathematical artifice; slice sensitivity profile; Algorithm design and analysis; Biomedical imaging; Computed tomography; Data mining; Detectors; Geometry; Image reconstruction; Image segmentation; Laboratories; Reconstruction algorithms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
ISSN :
1082-3654
Print_ISBN :
0-7803-6503-8
Type :
conf
DOI :
10.1109/NSSMIC.2000.950063
Filename :
950063
Link To Document :
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