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26 Cards in this Set
- Front
- Back
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Which one of these two does not use X-Rays:
MRI Computed Tomography |
MRI
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X-rays work by being [...] by some tissues more than others
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Absorbed
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In X-ray negative images, air will appear
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black
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From White to Black, order the way these would appear in an x-ray: Bone, Muscle, Fat, Air, Metal. (Assuming x-ray negative)
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Air, Fat, Muscle, Bone, Metal
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When looking at an X-ray, their left is on your [...]
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Right.
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Radiodense refers to
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the inability of radiation to pass through a particular material.
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Which one is more radiodense, metal or air?
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Metal
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Something is radiolucent if
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it permits the passage of x-rays
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Severe bilateral pneumonia can be identified in an x-ray because
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it is spread within the substance of the lungs. All of the lungs take on the same look (sort of gray-ish)
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Wedge shaped pneumonia can be identified in an x-ray because
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Fluid is produced only in a small space.
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What is pneumothorax?
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Pneumothorax is an abnormal collection of air or gas in the pleural space separating the lung from the chest wall
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How can pneumothorax be identified in an x-ray?
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Lung will be collapsed and look white, the rest of the space on the same side will look black - air.
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What is the defining characteristic of Tension Pneumothorax?
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It allows air to move into pleural space but NOT to back out. Very dangerous.
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how can hemothorax be identified in an x-ray?
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Hemothorax is blood in pleural space. The x-ray shows a uniform white where the blood is (blood - soft tissue coloring)
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How can emphysema be identified in x-ray?
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Diaphragm sits very, very low (air gets trapped in the lung - the trouble is with exhaling)
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How can situs inversus be identified in an x-ray?
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Normal rotation of organs is reversed. You could see heart and stomach on right side.
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In an x-ray positive image, dense is
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black
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Radiopaque contrast media that helps see GI track?
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Barum
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Radiopaque contrast media that helps see circulation
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Iodinated contrast
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In a CT scan, the patient's feet are [...] you and the patients left is to your [...]
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forward
right |
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In a CT scan metal and bone appear [...]
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white. Muscle and Fat are gray-ish, air is black.
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Bullous disease can be identified because
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there are big empty spaces in the Lung Windows (CT scan)
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What is MRI good for?
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Soft tissue contrast - used for viewing CNS, ortho injuries, cardiac, breast, body
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Would you get an MRI to look at the thorax?
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No. Only for ligaments, nervous system, tendons, etc.
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T1-weighted image (MRI)
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Myelin is bright, fluid is dark
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T2-weighted image (MRI)
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Myelin is dark, fluid is bright
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