MEDRADSC 3DA3 Lecture Notes - Lecture 8: Frontal Lobe, Pulmonary Circulation, White Matter

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3DA3
• Professor: Dwight Mountford

Document Summary

Ischemic stroke: 80% of strokes, can be thrombotic or embolic (clot forms in the brain or breaks off from a different part, goes to brain, blockage, hemorrhagic stroke, rupture of a blood vessel. In stroke patients, may have an area of infarcted tissue, surrounded by penumbra: penumbra is the target!- what we can save, blue: infarcted, red ring around is the penumbra, penumbra: blurring around the edge of the object. If using single slice, we have to be precise: the perfusion maps can be generated in a short time at a workstation equipped with the appropriate software. Perfusion studies: co(cid:374)(cid:448)e(cid:374)tio(cid:374)al ct is the pri(cid:373)ar(cid:455) i(cid:373)agi(cid:374)g (cid:373)odalit(cid:455) i(cid:374) the e(cid:448)aluatio(cid:374) of stroke to e(cid:454)(cid:272)lude hemorrhage. Intracranial hemorrhage: existing infarcts, valuable time can be gained by measuring cerebral perfusion during the initial ct. Technique radiation burns: unenhanced ct of the whole brain is first step, scan location of perfusion images identified on c- scan.