X-ray detector gain calibration depending on the fraction of...

Details X-ray detector gain calibration depending on the fraction of... X-ray detector gain calibration depending on the fraction of...

2011-04-05

2011-04-05

Ho, Allen C. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S207000, C250S252100

Reexamination Certificate

active

07920672

ABSTRACT:
It is described a gain calibration for a two-dimensional X-ray detector (315), in which the gain coefficients for scattered radiation (307b) and direct radiation (307a) are measured or estimated separately. A weighed average may be applied on the appropriate scatter fraction. The scatter fraction depending gain calibration method produces less ring artifacts in X-ray images as compared to known gain calibration methods, which do not take into account the fraction of scattered radiation reaching the X-ray detector (315).

REFERENCES:
patent: 4891829 (1990-01-01), Deckman et al.
patent: 6157700 (2000-12-01), Sako
patent: 6396074 (2002-05-01), Tsujii
patent: 6789943 (2004-09-01), Zapalac
patent: 6819786 (2004-11-01), Hirai
patent: 6868137 (2005-03-01), Inoue
patent: 7075061 (2006-07-01), Spahn
patent: 7119327 (2006-10-01), Spahn et al.
patent: 7142705 (2006-11-01), Inoue et al.
patent: 7221735 (2007-05-01), Inoue
patent: 7734009 (2010-06-01), Brunner et al.
patent: 2003/0072409 (2003-04-01), Kaufhold et al.
patent: 2005/0078787 (2005-04-01), Dinten et al.
patent: 2005/0092909 (2005-05-01), Spahn
patent: 2005/0243963 (2005-11-01), Ghelmansarai et al.
patent: 2006/0002505 (2006-01-01), Saito
patent: 1553407 (2005-07-01), None
patent: 2005006257 (2005-01-01), None
Zellerhoff M. et al.: “Low contrast 3D-reconstruction from C-arm data” Proceedings of SPIE, Medical Imaging 2005: Physics of Medical Imaging, vol. 5745, Apr. 2005, pp. 646-655, XP002459510.

Affiliated with

Also associated with

Rating

X-ray detector gain calibration depending on the fraction of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with X-ray detector gain calibration depending on the fraction of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray detector gain calibration depending on the fraction of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2684104