X-ray or gamma ray systems or devices – Electronic circuit – X-ray source power supply
Patent
1997-04-01
1998-10-13
Wong, Don
X-ray or gamma ray systems or devices
Electronic circuit
X-ray source power supply
378 16, 378145, H05G 120
Patent
active
058223932
ABSTRACT:
In a method for adaptively modulating the power level of an x-ray tube of a computer tomography (CT) system for reducing an x-ray dose of an x-ray beam radiating through a patient and reaching detector means of said CT system during the acquisition of projections of body slices of the patient, the value of the maximum attenuation level per projection is established out of the patient projection data acquired for the respective projection and stored in a memory. The value of the maximum attenuation level for the next projection is predicted based on at least one of the stored values of the maximum attenuation levels and the respective power level of the x-ray tube for the next projection is established. Finally the respective power level of the x-ray tube for the next projection is accordingly adjusted.
REFERENCES:
patent: 5379333 (1995-01-01), Toth
patent: 5400378 (1995-03-01), Toth
Siemens Aktiengesellschaft
Wong Don
LandOfFree
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