Unformatted text preview: Imaging Anatomy of the CNS Basic Imaging Types
Basic Imaging Types Xray
CT (Computed Tomography)
MRI (Magnetic Resonance Imaging)
Xray Limited Use
Evaluation of: – Bones, fractures
– Calcification Xray
Xray Computed Tomography
Computed Tomography What is CT?
What is CT? X ray study, therefore has risks.
Beams of Xray are shot through object, and received on the other side.
This is done in a 360o manner.
Computer reconstructions of each 360o turn gives us each image “slice”.
Based on tissue density.
Sections only in axial plane. Magnetic Resonance Imaging
Magnetic Resonance Imaging What is MR?
What is MR? Not an Xray, electromagnetic (similar to microwave)
Electromagnetic field aligns all the protons in the brain.
Radiofrequency pulses cause the protons to spin.
Amount of energy emitted from the spin is proportional to number of protons in the tissue.
No ferromagnetic objects. Angiography
Angiography Real time Xray study
Catheter placed through femoral artery is directed up aorta into the cerebral...
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- Fall '08
- Magnetic resonance imaging, Corpus callosum, Basal cisterns