mri most clearly has advantages where ct is degraded by bone hardening and streak artefacts ( spine , skull base , posterior and temporal fossa , sella and parasellar regions ) and in diseases in which the x-ray attenuation of the suspected lesion differs little from normal parenchyma ( paediatric brain disorders , demyelination and dysmyelination , early oedema associated with infarction , infection or low-grade infiltrating neoplasm , subacute and chronic haemorrhage and lesions in the spinal subarachnoid space and cord ) .
C0012634
diseases
C0027651
neoplasm