X-ray CT apparatus

Details X-ray CT apparatus X-ray CT apparatus

2007-06-04

2009-12-29

Ho, Allen C. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S004000, C378S109000

Reexamination Certificate

active

07639776

ABSTRACT:
The present invention aims to obtain a tomographic image similar in image quality to a tomographic image obtained by executing a scan at X-ray tube current value set by an X-ray automatic exposure function even when the X-ray tube current value set by the X-ray automatic exposure function are not within a standard range of the X-ray tube current values settable at the X-ray tube (21). X-ray tube current value supplied to the X-ray tube (21) are set by the X-ray automatic exposure function. Thereafter, when the X-ray tube current value set by the X-ray automatic exposure function is not within in the standard range of the X-ray tube current value settable at the X-ray tube, the X-ray tube current value at a portion not within the standard range are changed so as to be within the standard range, and the set value of helical pitch is changed so as to correspond to the ratio between the pre-changed x-ray tube current value and the post-changed X-ray tube current value.

REFERENCES:
patent: 5301108 (1994-04-01), Hsieh
patent: 5379333 (1995-01-01), Toth
patent: 5400378 (1995-03-01), Toth
patent: 5450462 (1995-09-01), Toth et al.
patent: 5568530 (1996-10-01), Saito et al.
patent: 5696807 (1997-12-01), Hsieh
patent: 6198789 (2001-03-01), Dafni
patent: 6285741 (2001-09-01), Ackelsberg et al.
patent: 6404844 (2002-06-01), Horiuchi et al.
patent: 6459756 (2002-10-01), Tam et al.
patent: 6507639 (2003-01-01), Popescu
patent: 6529575 (2003-03-01), Hsieh
patent: 6529576 (2003-03-01), Hsieh et al.
patent: 6639965 (2003-10-01), Hsieh et al.
patent: 6744846 (2004-06-01), Popescu et al.
patent: 6836535 (2004-12-01), Toth et al.
patent: 6901129 (2005-05-01), Tachizaki et al.
patent: 6904127 (2005-06-01), Toth et al.
patent: 7050532 (2006-05-01), Gohno
patent: 7054407 (2006-05-01), Li et al.
patent: 2003/0123603 (2003-07-01), Suzuki
patent: 2004/0202277 (2004-10-01), Okumura et al.
patent: 2004/0202283 (2004-10-01), Okumura et al.
patent: 2004/0264628 (2004-12-01), Besson
patent: 2005/0053190 (2005-03-01), Gohno
patent: 2005/0249329 (2005-11-01), Kazama et al.
patent: 2006/0109954 (2006-05-01), Gohno
patent: 2007/0071160 (2007-03-01), Nishide et al.
patent: 1172069 (2002-01-01), None
patent: 2001-178713 (2001-07-01), None
patent: 2003010168 (2003-01-01), None
patent: 2003116836 (2003-04-01), None
patent: 2004000585 (2004-01-01), None
patent: 2004132859 (2004-04-01), None
patent: 2006110183 (2006-04-01), None
patent: 0211068 (2002-02-01), None
patent: 2004071301 (2004-08-01), None
patent: 2004080309 (2004-09-01), None
patent: 2006006090 (2006-01-01), None
Hiroyuki Kudo et al., Exact and approximate algorithms for helical cone-beam CT, Physics in Medicine and Biology, Jul. 7, 2004, pp. 2913-2931, London, GB.

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