Correction coefficient calculating method for X-ray CT...

Details Correction coefficient calculating method for X-ray CT... Correction coefficient calculating method for X-ray CT...

2006-12-12

2006-12-12

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

07149277

ABSTRACT:
An object of the present invention is to calculate a more accurate beam-hardening correction coefficient. A phantom having an oblong section or a phantom having an annular (sector) section and a uniform thickness is positioned in an X-ray CT system, and scanned from plural directions in order to acquire a plurality of views. The results of the scan are used to calculate a correction coefficient that is used to correct projection information to be acquired from a subject.

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Computer translation of FR 2656697 A.
Mitchell M. Goodsitt, Beam Hardening errors in post-processing dual energy quantitative computed tomography, 1039 Med. Phys. 22 (7), Jul. 1995, Woodbury, NY, US.
Partial European Search Report, Docket 16CT148821, European Patent Application No. 04 251 879.5, 6 pgs.

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