MRI Pathology
| Front | Mortons Neuroma |
| Back | - enlargement of nerves between third and fourth metatarsals- thickening of tissue around nerve bc of compression- pain, stinging and numbness- activity, meds, footwear, surgeryMR APPEAR: T1 hypo, T2/STIR intermediate to increased signalBest seen on Axial |
| Front | Ischemic Stroke |
| Back | - reduction in bood flow to brain, BE FAST-atherosclerosis - 3 hour golden windowMR APPEAR:Acute: vascular enhancemrnt within 2 hoursSubacute:parenchymal enhancement hyper on T2Chronic: T1 hypo, T2 hyperBEST SEQ: DWI |
| Front | Arnold-Chiari Malformation |
| Back | - downward elongation of brainstem cerebellum and fourth ventricle into cervial region- Type I: cerebellar tonsil herniation 5-6mm, syrinx- Type II: herniation of tonsil, 4th ventricle, cerebellum and medulla. Hydrocephalus, myelomeningocele(spina bifida) and agenesis of corpus- Type III: like type 2 with meninges and brainstem in encephalocelesMODALITY: MRIBEST SEQ: Sag T2 |