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Title: Apparatus and method for variable angle slant hole collimator

Abstract

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:
Research Org.:
Oak Ridge Office, Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1371844
Patent Number(s):
9,711,251
Application Number:
14/818,839
Assignee:
JEFFERSON SCIENCE ASSOCIATES, LLC
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Aug 05
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Lee, Seung Joon, Kross, Brian J., and McKisson, John E. Apparatus and method for variable angle slant hole collimator. United States: N. p., 2017. Web.
Lee, Seung Joon, Kross, Brian J., & McKisson, John E. Apparatus and method for variable angle slant hole collimator. United States.
Lee, Seung Joon, Kross, Brian J., and McKisson, John E. Tue . "Apparatus and method for variable angle slant hole collimator". United States. https://www.osti.gov/servlets/purl/1371844.
@article{osti_1371844,
title = {Apparatus and method for variable angle slant hole collimator},
author = {Lee, Seung Joon and Kross, Brian J. and McKisson, John E.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {7}
}

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