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Measurement of temporal resolution in dual source CT
Author(s) -
McCollough Cynthia H.,
Schmidt Bernhard,
Yu Lifeng,
Primak Andrew,
Ulzheimer Stefan,
Bruder Herbert,
Flohr Thomas G.
Publication year - 2008
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 - 10.1118/1.2826559
Subject(s) - imaging phantom , artifact (error) , temporal resolution , computer vision , image resolution , computer science , artificial intelligence , resolution (logic) , tomography , iterative reconstruction , physics , optics
This work assesses the temporal resolution of dual‐source computed tomography (CT) in a visually intuitive manner. Exploiting the principles of ring artifact creation, a phantom containing a highly attenuating delta function signal (a wire) was rotated at the same speed as the gantry, creating a partial ring artifact where the angular extent of the artifact provides a direct indication of the temporal resolution. A demonstration of the effect of the evaluated 165 and 83 ms nominal temporal resolutions on motion artifacts in cardiac CT is provided using patient data.