PHYSICS 102 Lecture Notes - Lecture 9: Diffusion Mri, Cerebral Angiography, Ct Scan
Document Summary
Neuroimaging/ methods of studying the nervous system: what methods are there to produce images of the brain, how do these methods differ, what is temporal resolution and spatial resolution, explain diagram in course manual. Injecting substance into body that absorbs x-rays less/more than surrounding tissue. Heightens the contrast contrary to normal x-ray scans. E. g. cerebral angiography: infusion of radio-opaque dye into cerebral artery to visualize cerebral circulatory system during x-ray. Computer assisted x-ray procedure to visualize brain and other internal structures. Cylinder with x-ray beam on one side and x-ray detector on other side. Whole thing rotates around head and produces many individual photographs. Information is combined to horizontal sections on a computer. High resolution images of brain in three dimensions. High spatial resolution: ability to detect and represent differences in spatial location. Measurement of waves which hydrogen atoms emit when they are activated by radio-frequency waves in a magnetic field.
