Device for computed tomography

Details Device for computed tomography Device for computed tomography

1979-04-10

1982-01-05

Church, Craig E.

Radiant energy

Inspection of solids or liquids by charged particles

Analyte supports

364414, G03B 4116

Patent

active

043096140

ABSTRACT:
In computed tomography apparatus the radiation intensity of the radiation source remains constant during a measuring operation. This means that in those positions in which the absorption of the radiation through the patient is particularly weak, the patient gets an unnecessarily large dose without any useful effect, as only a distinct number of X-ray quanta is required for a given measuring accuracy. It is an object of the invention to measure the radiation absorption distribution at a reduced dose but without the measuring accuracy being affected. The radiation intensity of the radiation source in a measuring position is made dependent on the mean measuring error of the adjacent measuring position; the mean measuring error does then indeed not remain constant but it fluctuates less than when a constant intensity of the radiation source is used.

REFERENCES:
patent: 4032784 (1977-06-01), Rich
patent: 4051377 (1977-09-01), Kemner

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