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43 Cards in this Set
- Front
- Back
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Who used the first X-rays?
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Wilhelm Roentgen
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When was the first diagnostic use of X-rays?
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1896
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In x-rays, from what are electrons emitted?
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Cathode
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In x-rays, electrons are directed at what?
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Anode
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The greater the density, the greater the absorption or scatter of x-rays, true or false?
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True
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Unexposed film appears bright or dark?
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Bright
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High attenuation corresponds to bright or dark xrays?
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Bright
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Exposed film appears bright or dark?
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Dark
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Low attenuation corresponds to bright or dark xrays?
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Dark
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Gas appears what on an x-ray?
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Dark
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Fat appears what on an x-ray?
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Gray
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Water appears what on an x-ray?
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Light
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Bone appears what on an x-ray?
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White
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Does blood appear brighter or darker than fat on x-ray?
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Brighter
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Differences in overlapping tissues can be determined by what sign?
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Silhouette sign
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An underexposed object will appear what on xray?
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Bright white
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An overexposed object will appear what on xray?
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Dark
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Objects closer to film appear smaller or larger?
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Smaller
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Blurry and indistinct borders indicate the object is closer to or farther away from the film?
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Farther away
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A PA xray results in what organ being minimally magnified?
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Heart
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An AP xray results in what organ being magnified?
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Heart/mediastinum
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Which xray shows more distinct borders of the heart, PA or AP?
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PA
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Lateral xrays are named by what?
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The side closest to the film
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Which side is most commonly xrayed on a lateral xray?
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Left (magnifies heart more)
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Which xray involves the patient standing and arching their back to elevate the clavicles above the apices?
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Lordotic
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What diseases are lordotic xrays done to detect?
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TB
Pancoast tumor |
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Oblique xrays are done to detect what?
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Rib fractures
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What do lateral decubitus xrays detect?
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Fluid in pleural space - pleural effusion
Ascites in abdomen |
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Which plane cuts the body into left and right halves?
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Sagittal
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Which plane cuts the body into anterior & posterior halves?
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Coronal
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What is the name for "motion picture" xrays which are viewed on a special monitor?
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Fluoroscopy
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What field of radiology involves injecting contrast in order to visualize the arteries, veins, and disc spaces?
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Interventional radiology
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What field of radiology involves the administration of a radioisotope that emits gamma rays?
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Nuclear medicine
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What do abnormal results show on a bone scan?
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Increased uptake/metabolism, increased mineral turnover
"hot spots" |
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What test utilizes a high-energy sound wave?
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Ultrasound
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Which study blurs structures above and below an area to allow it to be better visualized?
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Tomography
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What test involves a number of cross sectional slides without superimposed images?
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CT
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CT cannot discriminate among subtle density differences, true or false?
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False
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What test involves radiowaves that are used to produce a pulse emission from the patient's tissues?
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MRI
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What are contraindications for MRI?
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Ferrous or mechanical devices
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What is the name for a contrast media study of synovial joint and related soft tissue?
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Arthrogram
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What is the name for a contrast study of spinal cord, nerve root, and dura mater?
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Myelography
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Where is contrast media injected in a myelography?
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Subarachnoid space
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