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8 Cards in this Set
- Front
- Back
CT/CAT
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CT = Computed Tomography
CAT= Computerized axial tomopgrahy pt moves slowly through doughnut shaped CT machine, xray tube rotates around body. translates images to corss sectional pictures of each body region scanned |
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Xenon CT
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brain scan enhanced with xenon gas.
inhaled xenon travels through bloodstreams > tissues. no xenon trace in brain indicated stroke is occurring |
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DSR
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DSR = Dynamic Spatial Reconstruction
ultrafast CT scanners, 3D images of body organs from any angle; visualize heart beating and blood flowing through blood vessels, can determine heart defects, constricted or blocked BVs, status of coronary bypass grafts |
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DSA
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DSA = DIGITAL SUBTRACTION ANGIOGRAPHY
(angiography = vessel pics) unobstructed view of small arteries; often used to ID bloackges in arteries |
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PET
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PET = positron emission tomography
observes metabolic processes; pt given injection of radioisotopes that attach to biological molecules. radioisotopes absorbed by most active brain cells > high gamma rays emmitted > computer produces live action picture > vivid colors mark brain activity most effetive use for pt with mental illnes, stroke, epilepsy |
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Sonography/Ultrasound
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sound waves
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MRI
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MRI=magnetic resonance imaging
useful when xrays and CT scans are weak; primarily maps body content of H+; subjects body to magnetic field > H+ radio waves enhanced > energy released from waves creates image MRI distinguishes body tissues based on h2o content. |
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MRS
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MRS=magnetic resonance spectroscopy
maps distribution of elements other htan H_ to reveal more about how disease changes body chemistry |