Sickle cell disease. Assess for vascular stenosis or moyamoya. The examination is limited by motion. Several sequences were repeated. A diagnostic perfusion sequence was not obtained because of motion.BRAIN MRI:There is no abnormal brain diffusion restriction or susceptibility artifact. There is no space-occupying or contrast-enhancing brain lesion. There is no midline shift or brain herniation. The ventricles and the other CSF-containing spaces are normal in size.There is minimal anterior ethmoid mucosal thickening, which is nonspecific. There is no destructive skull lesion. There is no significant diploic thickening.CRANIAL MRA:Apparent focal attenuation of signal involving the left internal carotid artery as it enters the skull is related to motion. The intracranial internal carotid arteries show preserved flow-related signal and caliber, and are symmetric. Similarly, the paired anterior and middle cerebral arteries and their major branches are preserved.The intracranial vertebral arteries are preserved, accounting for the right being slightly smaller than the left. The basilar artery and the posterior cerebral arteries are also preserved.
1.Examination is mildly limited by patient motion. There is no brain abnormality.2.Unremarkable MR angiography.