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Title: Pseudolocal tomography

Local tomographic data is used to determine the location and value of a discontinuity between a first internal density of an object and a second density of a region within the object. A beam of radiation is directed in a predetermined pattern through the region of the object containing the discontinuity. Relative attenuation data of the beam is determined within the predetermined pattern having a first data component that includes attenuation data through the region. The relative attenuation data is input to a pseudo-local tomography function, where the difference between the internal density and the pseudo-local tomography function is computed across the discontinuity. The pseudo-local tomography function outputs the location of the discontinuity and the difference in density between the first density and the second density. 7 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
264569
Assignee:
Univ. of California, Office of Technology Transfer, Alameda, CA (United States) PTO; SCA: 420500; PA: EDB-96:121971; SN: 96001625902
Patent Number(s):
US 5,539,800/A/
Application Number:
PAN: 8-410,620
Contract Number:
W-7405-ENG-36
Resource Relation:
Other Information: PBD: 23 Jul 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; TOMOGRAPHY; IMAGE PROCESSING; DEFECTS; NONDESTRUCTIVE TESTING; MATERIALS; EQUIPMENT