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Title: Apparatus and method for variable angle slant hole collimator

A variable angle slant hole (VASH) collimator for providing collimation of high energy photons such as gamma rays during radiological imaging of humans. The VASH collimator includes a stack of multiple collimator leaves and a means of quickly aligning each leaf to provide various projection angles. Rather than rotate the detector around the subject, the VASH collimator enables the detector to remain stationary while the projection angle of the collimator is varied for tomographic acquisition. High collimator efficiency is achieved by maintaining the leaves in accurate alignment through the various projection angles. Individual leaves include unique angled cuts to maintain a precise target collimation angle. Matching wedge blocks driven by two actuators with twin-lead screws accurately position each leaf in the stack resulting in the precise target collimation angle. A computer interface with the actuators enables precise control of the projection angle of the collimator.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1371844
Assignee:
JEFFERSON SCIENCE ASSOCIATES, LLC ORO
Patent Number(s):
9,711,251
Application Number:
14/818,839
Contract Number:
AC05-06OR23177
Resource Relation:
Patent File Date: 2015 Aug 05
Research Org:
Oak Ridge Office, Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Other works cited in this record:

Variable angle slant hole collimator
patent, December 1983

Adjustable collimator
patent, July 1995

Slant-hole collimator, dual mode sterotactic localization method
patent, July 2002

Multi-leaf collimator
patent, September 2009

Composite Segment Collimators for SPECT Without Dead Zones
patent-application, December 2012

Multi-Segment Slant Hole Collimator System And Method For Tumor Analysis In Radiotracer-Guided Biopsy
patent-application, June 2013

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