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Abstract #2277

Combined T2*-Weighted Acquisitions of the Human Brain and the Cervical Spinal Cord with a Dynamic Update of the Linear Shims

Jrgen Finsterbusch1, 2, Christian Sprenger1, 2, Christian Bchel1, 2

1Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; 2Neuroimage Nord, Hamburg-Kiel-Lbeck, Germany

Important basic functions of the central nervous system like sensory processing, motor execution or reflexes involve the spinal cord. To investigate the functional relationship between the brain and the spinal cord directly, fMRI acquisitions covering both regions in the same experiment are required. But the demands differ considerably between the two regions, in particular regarding the shim adjustment. With different fields-of-view, in-plane resolutions, and slice thicknesses and using a dynamic coil selection and update of the linear shim terms, combined T2*-weighted acquisitions of the brain and the cervical spinal cord are feasible as is demonstrated in healthy volunteers at 3T.

Keywords

acceleration acquisition acquisitions additional adjusting adjustment affects aliasing applied artifacts avoid axes background basic beck blue body bracket brain central cervical challenging channel chosen coil coils combined connectivity contribute cord counteracting cover covered covering dashed dedicated degrades direct dynamic dynamically effectively either element elements example excessive execution experiment feasible field fields functional functions furthermore geometric geometries gradient hamburg hard head healthy help homogeneity human identical improve improved improvement influence informed instead intensities intensity interaction investigated investigation involve latter linear motor must neck nervous noise offsets optimized optimum pain parallel particular planar prior processing pulse quality realize reasonable receive reduced reflect required requirements resolution resolutions respectively restores reveal sampling saturation scaling selected selecting selection sensitivities sensitivity sensory setup shim shimming shims simultaneously slice slices spacings spatial spinal stack stacks static structures sufficient summers system systems targeting terms thicknesses timings trio typically update updated upper versa vice view volunteer volunteers whole yielding yields