Sampled data CT system including analog filter and compensating

Details Sampled data CT system including analog filter and compensating Sampled data CT system including analog filter and compensating

1982-09-30

1985-11-19

Smith, Jerry

Boots, shoes, and leggings

364572, 364724, 364825, 378901, G06F 1542, G01T 117

Patent

active

045546339

ABSTRACT:
A CT scanner in which the amount of x-ray information acquired per unit time is substantially increased by using a continuous-on x-ray source and a sampled data system with the detector. An analog filter is used in the sampling system for band limiting the detector signal below the highest frequency of interest, but is a practically realizable filter and is therefore non-ideal. A digital filter is applied to the detector data after digitization to compensate for the characteristics of the analog filter, and to provide an overall filter characteristic more nearly like the ideal.

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Oppenheim, A. V. et al Digital Signal Processing, Prentice-Hall Inc: Englewood Cliffs, NJ, 1975, 132-133.
Soliman, A. M. et al., "Phase Correction in Two-Integrator Loop Filters Using a Single Compensating Resistor", Electronics Letters, vol. 14, No. 12, Jun. 1978, 375-376.

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