Bold Oxygen Level Dependant (BOLD) Quantitative Susceptibility Mapping (QSM) at Different Head Orientations
M Ethan MacDonald 1,2 , Avery Berman 2,3 , Rebecca J Williams 1,2 , Erin L Mazerolle 1,2 , and G Bruce Pike 1,2
Radiology and Clinical Neurosciences,
University of Calgary, Calgary, Alberta, Canada,
Brain Institute, Foothills Medical Centre, Alberta
Health Services, Calgary, Alberta, Canada,
Engineering, McGill University, Montreal, Quebec, Canada
In this work, we use a quantitative susceptibility
technique calculated from the phase data from BOLD-fMRI.
Measurements of the susceptibility time course
(BOLD-QSM) are compared to BOLD-fMRI in visual and motor
regions. Subjects heads are moved and imaging is
repeated. Contrast to noise ratio is calculated in the
signals from both techniques and found to be comparable.
Five of eight measured signals showed higher CNR with
the BOLD-QSM method. A good level of correlation is
obtained between the two methods.
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