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Extraction of information from CT scans at different energies
Author(s) -
Millner Michael R.,
McDavid William D.,
Waggener Robert G.,
Dennis Michael J.,
Payne William H.,
Sank Victor J.
Publication year - 1979
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594555
Subject(s) - imaging phantom , attenuation , effective atomic number , atomic number , medical imaging , tomography , physics , hounsfield scale , nuclear medicine , computed tomography , medical physics , computational physics , materials science , computer science , optics , artificial intelligence , radiology , atomic physics , medicine
The image displayed in computed tomography is a scaled representation of attenuation coefficients within the patient's body. A number of authors have presented methods by which additional information (such as electron density, effective atomic number, and extrapolated attenuation coefficients for therapy applications) can be extracted from CT scans carried out at different energies. In the present paper, the dual‐energy method described by Rutherford has been used to produce complete images of effective atomic number and electron density of a known phantom (the AAPM phantom) in order to investigate the usefulness of applying this method to current commercial scanners.