A phased array echoplanar imaging system for fMRI |
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| Institution: | 1. McLean Hospital, Brain Imaging Center, Belmont, MA, USA;2. Consolidated Department of Psychiatry, Harvard Medical School, Boston, MA, USA;3. Harvard-MIT Division of Health Sciences and Technology, Boston and Cambridge, MA, USA |
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| Abstract: | A fully parallel, simultaneous sampling phased array receiver system for a clinical echoplanar imaging system is described and evaluated for BOLD activation and relative cerebral blood volume (rCBV) experiments. A 4-coil array curved around the occipital lobe improved SNR by factors of 1.5 in the visual cortex and 3.1 in the visual association cortex relative to a 13-cm diameter surface coil, improving the statistical significance and coverage of visual activation maps. A 4-coil bilateral array increased SNR throughout the head relative to a quadrature head coil by up to a factor of 5 in much of the cortex, with proportional improvement in the SNR of rCBV maps. |
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