Emission computed tomography having radial position control of r

Details Emission computed tomography having radial position control of r Emission computed tomography having radial position control of r

1981-05-19

1984-04-24

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

G01T 120

Patent

active

044450354

ABSTRACT:
An emission computed tomography wherein a radiation detector is rotated around a subject to detect radiation emitted from radioisotopes distributed in the subject and a distributing image of the radioisotopes in any section of the subject is reconstructed on the basis of the detected data, the emission computed tomography including detector-driving apparatus for moving the detector to or from the subject as the detector is rotated around the subject, at least one distance-measuring device, such as an ultrasonic transducer, for measuring the distance between the detector and subject at every rotative position of the detector, and apparatus responsive to the measured distance for controlling the detector-driving apparatus in order to adjust the distance between the detector and subject within a predetermined range.

REFERENCES:
patent: 3432660 (1969-03-01), Anger
patent: 3970853 (1976-07-01), Kuhl et al.
patent: 4057726 (1977-11-01), Jaszczak
patent: 4204123 (1980-05-01), Stoddart
patent: 4368389 (1983-01-01), Blum

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