The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2012
Filed:
Sep. 29, 2009
Charles C. Watson, Knoxville, TN (US);
Larry Byars, Oak Ridge, TN (US);
Christian J. Michel, Lenoir City, TN (US);
Harold Rothfuss, Knoxville, TN (US);
Charles C. Watson, Knoxville, TN (US);
Larry Byars, Oak Ridge, TN (US);
Christian J. Michel, Lenoir City, TN (US);
Harold Rothfuss, Knoxville, TN (US);
Siemens Medical Solutions USA, Inc., Malvern, PA (US);
Abstract
In positron emission tomography (PET), a detector's response to scattered radiation may be different from its response to unscattered (true coincidence) photons. This difference should be accounted for during normalization and scatter correction. The disclosure shows that only a knowledge of the ratio of the scatter to trues efficiencies is necessary, however. A system and method are disclosed for measuring the scatter/trues detection efficiency ratio, as well as for applying this compensation during the scatter correction of PET emission data. PET detector efficiencies are measured in two steps, the first using a plane radiation source, and the second using a plane radiation source in combination with a scattering medium. A ratio of the scatter and trues detection efficiency is obtained from this data for each detector/crystal, and is applied as a correction factor to PET data obtained during medical imaging processes.