Focus collimator press for a collimator for gamma ray cameras
A focus collimator press for collimators for gamma ray cameras is described comprising a pivot arm of fixed length mounted on a travelling pivot which is movable in the plane of a spaced apart work table surface in a direction toward and away from the work table. A press plate is carried at the opposite end of the fixed length pivot arm, and is maintained in registration with the same portion of the work table for pressing engagement with each undulating radiation opaque strip as it is added to the top of a collimator stack in process by movement of the travelling pivot inward toward the work table. This enables the press plate to maintain its relative position above the collimator stack and at the same time the angle of the press plate changes, becoming less acute in relation to the work table as the travelling pivot motes inwardly toward the work table. The fixed length of the pivot arm is substantially equal to the focal point of the converging apertures formed by each pair of undulating strips stacked together. Thus, the focal point of each aperture row falls substantially on the axis of the travelling pivot, and since it moves in the plane of the work table surface the focal point of each aperture row is directed to lie in the same common plane. When one of two collimator stacks made in this way is rotated 180 degrees and the two bonded together along their respective first strips, all focal points of every aperture row lie on the central axis of the completed collimator.
- Assignee:
- Precise Corp.
- Patent Number(s):
- US 4056427
- OSTI ID:
- 6702022
- Resource Relation:
- Patent File Date: Filed date 14 Jul 1976
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
62 RADIOLOGY AND NUCLEAR MEDICINE
COLLIMATORS
FABRICATION
GAMMA CAMERAS
PRESSES
DESIGN
COLD PRESSING
FOILS
LEAD
CAMERAS
ELEMENTS
MATERIALS WORKING
METALS
PRESSING
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
550601 - Medicine- Unsealed Radionuclides in Diagnostics