Image reconstructing method and X-ray CT apparatus

Details Image reconstructing method and X-ray CT apparatus Image reconstructing method and X-ray CT apparatus

2006-10-06

2009-12-29

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

07639772

ABSTRACT:
The slice thickness of tomograms of an X-ray CT apparatus is to be kept as constant as practicable within an xy plane. In projected data before three-dimensional back-projection, after convolving row-directional filter of an X-ray detector whose filter coefficient is adjusted channel by channel, three-dimensional back-projection is performed to achieve image reconstruction thereby to control the slice thickness of tomograms according to the distance from the center of the xy plane. The slice thickness is controlled to keep it as constant as practicable independent of the distance from that center to regulate the picture quality of tomograms. Further, the relative density of distances on the reconstruction plane of X-ray detector data or projection data projected on the reconstruction plane is controlled by creating virtual projection data thereby to improve the picture quality of tomograms.

REFERENCES:
patent: 4734988 (1988-04-01), Steele et al.
patent: 5377250 (1994-12-01), Hu
patent: 5654820 (1997-08-01), Lu et al.
patent: 5864598 (1999-01-01), Hsieh et al.
patent: 6061419 (2000-05-01), Hsieh et al.
patent: 6173033 (2001-01-01), Klingenbeck-Regn et al.
patent: 6256365 (2001-07-01), Lai
patent: 6272200 (2001-08-01), Pan et al.
patent: 6343108 (2002-01-01), Heuscher
patent: 6404844 (2002-06-01), Horiuchi et al.
patent: 6647084 (2003-11-01), Hsieh
patent: 6845144 (2005-01-01), Nishide et al.
patent: 6865247 (2005-03-01), Hagiwara
patent: 6873679 (2005-03-01), Hagiwara
patent: 6977984 (2005-12-01), Hsieh et al.
patent: 2002/0122529 (2002-09-01), Heuscher
patent: 2002/0131549 (2002-09-01), Oikawa
patent: 2003/0016781 (2003-01-01), Huang
patent: 2003/0097063 (2003-05-01), Wang et al.
patent: 2003/0185345 (2003-10-01), Hsieh
patent: 2004/0047449 (2004-03-01), Hagiwara
patent: 2004/0081273 (2004-04-01), Ning
patent: 2004/0086075 (2004-05-01), Hein et al.
patent: 2005/0201511 (2005-09-01), Hagiwara et al.
patent: 2005/0226365 (2005-10-01), Taguchi
patent: 2006/0093083 (2006-05-01), Nishide et al.
patent: 09-238935 (1997-09-01), None
patent: 2002-320609 (2002-11-01), None
patent: 2003-159244 (2003-06-01), None
patent: 2003-334188 (2003-11-01), None
patent: 2004-041674 (2004-02-01), None
patent: 2004-041675 (2004-02-01), None
patent: 2004-073360 (2004-03-01), None
Kak, A.C. and Slaney, M., “Principles of Computerized Tomographic Imaging,” IEEE Press, New York, (electronic copy, 1999) (93 pages).

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