<prompt> False about Diffusion-weighted MRI :High apparent Diffusion CoefficientBased on brownian motionDetects cytotoxic edema before a vasogenic edema developsHigh cellularity tumours can be detected  <response>: Diffusion-weighted imaging DWI Based on Brownian motion of water molecules within a voxel of tissue. When there is Diffusion Restriction-MRI gives a bright signal on DWI images and has low apparent Diffusion CoefficientADC value. DW-MRI detects Cytotoxic edema before a Vasogenic edema develops. Lesions showing Diffusion Restriction InfarctAcute Infarct- IOC Abscess Medulloblastoma Other High Cellularity Tumours . Epidermoid Cyst 