X-ray or gamma ray systems or devices – Specific application – Tomography
Patent
1981-08-20
1984-04-10
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Tomography
378 25, 378 20G, G03B 4116
Patent
active
044425333
ABSTRACT:
An indicator for visibly defining the image plane located at the movable fulcrum of a tomography X-ray machine. The indicator includes a laser beam light source mounted for vertical movement along a rack and pinion assembly. As the fulcrum of the X-ray machine is raised or lowered with respect to the patient to take X-ray images along different horizontal planes, a pulse generator generates a signal responsive to the movement. The signal operates a servo-drive mechanism that moves the light source a corresponding vertical distance along the rack and pinion assembly.
REFERENCES:
patent: 4117337 (1978-09-01), Saats
patent: 4315156 (1982-02-01), Sell
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