Boots – shoes – and leggings
Patent
1984-10-29
1987-11-17
Smith, Jerry
Boots, shoes, and leggings
378901, 382 6, G06F 1542
Patent
active
047077867
ABSTRACT:
A computer tomography system has an X-ray source and a radiation receiver having an array of individual detectors each forming an electrical signal corresponding to the received radiation intensity, the X-ray source being rotated about a subject for transradiating a layer of the subject from different directions, and a measured value processing circuit to which the output signals of the individual detectors are supplied and which identifies therefrom attenuation values of predetermined points in the transradiated plane of the subject for generating a display image. The measure value processing circuit has a convolution computer, and further has an adaptive digital filter and a filter control unit to which the signals from the array are supplied before being operating on by the convolution computer. The filter control unit controls the transfer function of the filter as a function of the filter input signal so as to substantially reduce image artifacts due to quantum and electronics noise.
REFERENCES:
patent: 4135247 (1979-01-01), Gordon et al.
patent: 4189775 (1980-02-01), Inouye et al.
patent: 4386430 (1983-05-01), Treiber
patent: 4389540 (1983-06-01), Nakamura et al.
patent: 4494214 (1985-01-01), Bernard et al.
patent: 4524424 (1985-06-01), White
patent: 4535417 (1985-08-01), Peacock
patent: 4554633 (1985-11-01), Glover et al.
patent: 4562437 (1985-12-01), Sasaki et al.
patent: 4573135 (1986-02-01), Dieterich
Frank Zimmermann, "A State Variable Approach to Digital Image Processing", Oct. 1973.
"Suppression of Ring Artefacts in CT Fan-Beam Scanners", Kowalski, IEEE Transactions on Nuclear Science, vol. NS-25, No. 5, Oct. 1978, pp. 1111-1116.
"A modified convolution reconstruction technique for divergent beams", Webb, Phys. Med. Biol., 1982, vol. 27, No. 3, pp. 419-423.
Siemens Aktiengesellschaft
Smith Jerry
Tbui Kimthanh
LandOfFree
Computer tomography system and method for operating same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Computer tomography system and method for operating same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer tomography system and method for operating same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1454029