BWH Manual (PDF) - INTRuST Neuroimaging Leadership Core

8.1 Localizer• This scan is a quick acquisition in 3 orthogonal planes and is used for anatomicalorientation. One slice acquired in the middle of each plane (axial, sagittal, andcoronal). The head should be centered laterally along the inter-hemispheric fissureand centered on the thalamus for the anterior/posterior and superior/inferior planes.• Please use the images below as reference when determining if the subject ispositioned properly.• It is important to use padding around the subject’s head in order to prevent motion(use straps if available).• Proper placement in the head coil is crucial because scans are acquired straight, notin an oblique orientation.• If the subject is not positioned properly please adjust the subject in the head coiland run the localizer again.• Continue repositioning and scouting until the subject is correctly centered in the headcoil.Make sure the subject is aligned correctly in the head coil and is not rotated. Their head shouldbe as straight as possible in the coil. Please adjust the subject if necessary.Note: Pre-scan AdjustmentsMost modern MRI scanners provide automated adjustment procedures for RF coil tuning andfrequency adjustments after the subject is positioned in the magnet. Follow the adjustmentprocedures provided by the manufacturers.8.2 DTI Scan8.2.1 Orientation for DTI Scan• Images should be acquired axially.