Eccentric source collimator assembly for rotating source ct scanner

Patent · Mon Dec 07 23:00:00 EST 1981

OSTI ID:5504055

Braden, A B; Covic, J; Kuwik, J J; Richey, J B; Taylor, S K

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.

• Assignee: Technicare Corp
• Patent Number(s): US 4304999
• OSTI ID: 5504055
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ALIGNMENT
BEAM OPTICS
CAT SCANNING
COLLIMATORS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DOSE LIMITS
IMAGE PROCESSING
MEASURING INSTRUMENTS
MOTION
POSITIONING
PROCESSING
RADIATION DETECTORS
ROTATION
SAFETY STANDARDS
STANDARDS
TOMOGRAPHY
VANES