Repeatability and reproducibility of brain quantitative susceptibility mapping.
Kofi Deh 1 , Sarah Eskreis-Winkler 2 , Pascal Spincemaille 2 , Thanh Nguyen 2 , and Yi Wang 1,3
Weill Cornell Medical College, New York, NY,
Cornell Medical College, New York, United States,
of Biomedical Engineering, Cornell University, NY,
The amount of variation between quantitative
susceptibility maps (QSM) of the same subject acquired
with different MRI systems has remained an open
question. We investigated this problem by comparing QSM
images acquired at two different sites, one with a
Siemens 3T and the other with a GE 3T scanner. We
obtained high correlation coefficients for QSM images
from the two sites (0.99 for phantoms, 0.97 for humans).
Taken together with our Bland-Altman plots of the data,
which indicated no bias, we conclude that scanner
systems we studied may be used interchangeably.
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