Method for determining correction coefficients for detector...

Details Method for determining correction coefficients for detector... Method for determining correction coefficients for detector...

2006-06-06

2006-06-06

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Accessory

Testing or calibration

C378S018000, C378S019000

Reexamination Certificate

active

07056018

ABSTRACT:
A method is for determining correction coefficients or parameters, in particular channel correction coefficients and/or spacing coefficients, for detector channels for a computed tomograph. In the method, a scan is carried out in order to obtain a sinogram of a phantom (11) which is formed with a smooth cross-sectional profile and is inserted into the computed tomograph in such a way that two or more different attenuation values are detected in a full scan of virtually all the detector channels (3). Attenuation profiles that are obtained from the sinogram are subjected to high-pass filtering for each projection of the scan, in order to obtain discrepancies of an ideal profile which is predetermined by the phantom (11). A model function is matched to the discrepancies that are obtained for each of the detector channels (3) as a function of the detected attenuation values, from which the coefficients or parameters are obtained. The method allows the channel correction coefficients to be determined easily, and the spacing coefficients also can be determined easily at the same time.

REFERENCES:
patent: 5095431 (1992-03-01), Feldman et al.
patent: 5214578 (1993-05-01), Cornuejols et al.
patent: 5225979 (1993-07-01), Feldman et al.

Affiliated with

Also associated with

Rating

Method for determining correction coefficients for detector... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for determining correction coefficients for detector..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining correction coefficients for detector... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3629711