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Fundamentals of Image Interpretation Joseph Castillo B.Sc, M.Sc (MRI) Five levels Normal anatomy as seen on MR Abnormal anatomy Accurate and complete patient history – In our unit this is not an option. Pathology – Read MRI reports Accurate clinical interpretation Clinical Imaging Three basic orthogonal planes used in MRI – axial, sagittal and coronal Unlike CT, radiographers have the ability to image biological functions not just electron density. We manipulate parameters to get T1W, T2W and PDW. The appearance of the organ is changed. Spine Imaging feature T1W PDW T2W Spinal Cord intermediate intermediate Intermediate CSF dark Intermediate Bright vertebrae intermediate intermediate Intermediate disc intermediate Light gray Bright fat bright Light gray intermediate Cortex dark dark dark Spine Spine Which one is T2w? A B ?Pathology ?Pathology ?disk Urgent MRI? ?fracture What is this high signal? metal Musculoskeketal Structure T1W PDW T2W Fat bright bright intermediate Muscle intermediate intermediate Dark Bone marrow Intermediate/bright intermediate Intermediate Cortical bone dark dark dark Cartilage bright bright Intermediate Ligament/tendon dark dark Dark Fibrous tissue dark dark Dark Oedema dark bright Bright Solid organs variable variable variable Knee MRI What is wrong with this knee? ?? Meniscus STIR and T1W
