Eccentric source collimator assembly for rotating source CT scan

Details Eccentric source collimator assembly for rotating source CT scan Eccentric source collimator assembly for rotating source CT scan

1979-01-02

1981-12-08

Smith, Alfred E.

Radiant energy

Inspection of solids or liquids by charged particles

Analyte supports

250505, A61B 600, G02B 500

Patent

active

043049990

ABSTRACT:
Disclosed is a collimator for a tomographic scanner which performs the collimator function of dividing a fan of radiation into a multiplicity of finger beams and the attenuator function of causing a generally bell-shaped radiation energy distribution across a scan circle. The collimator has larger effective apertures for forming radiation into finger beams to traverse the center of the scan circle than for forming finger beams to traverse the edges of the scan circle. The width of the collimator apertures are defined by radially oriented vanes arranged along a circular arc. By offsetting the radiation source from the geometric center of the circular arc, the vanes defining the width of some apertures are more skewed than others relative to the radiation paths.

REFERENCES:
patent: 4096389 (1978-06-01), Ashe et al.
patent: 4101768 (1978-07-01), Lill
patent: 4132895 (1979-01-01), Froggatt

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