Premium
Accuracy and reproducibility of image derived relaxation times on a clinical 1.5 T magnetic resonance scanner
Author(s) -
Masterson M. E.,
McGary R.,
Schmitt K.,
Koutcher J. A.
Publication year - 1989
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 - 10.1118/1.596373
Subject(s) - reproducibility , scanner , magnetic resonance imaging , nuclear magnetic resonance , medical imaging , nuclear medicine , relaxation (psychology) , medical physics , physics , medicine , optics , radiology , mathematics , statistics
A methodology for evaluating the accuracy and reproducibility of calculated T 1 's and T 2 's has been developed and applied to a General Electric 1.5 T Signa System. Specifically studied were absolute accuracy and temporal stability of image derived T 1 's and T 2 's as well as the dependence of calculated relaxation times on position in the scan plane, position along the axis of the magnet bore, the scan plane orientation (axial, sagittal, coronal), and the center frequency. The results of this study of the accuracy and reproducibility of image relaxation times have direct bearing on the design of clinical investigations assessing the diagnostic usefulness of these values.