Continuous wave fan beam tomography system having a best-estimat

Details Continuous wave fan beam tomography system having a best-estimat Continuous wave fan beam tomography system having a best-estimat

1984-04-05

1985-10-15

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, G03B 4116

Patent

active

045478937

ABSTRACT:
A continuous wave fan beam tomographic system having continuous x-ray absorption values sampled at a sampling rate and means to provide a best-estimate of the x-ray absorption values at discrete points in time. The means to provide a best-estimate includes a continuous filter having a frequency range defined by the geometry of the mechanical system. Errors due to the statistical variation in photon emissions of the x-ray source are thereby minimized and the effective signal-to-noise ratio of signals is enhanced, which in turn allows a significant reduction in radiation dosage.

REFERENCES:
patent: 4034223 (1977-07-01), Kowalski

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