Term
| Why is heart larger in AP projection rather than PA projection? |
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Definition
| Because heart's anterior position puts it farther from the imaging surface, making it more magnified |
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Term
| What is the snow ball sign |
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Definition
| Ball before impact means mass is in the lung; ball after impact means mass is not in the lung (could be in pleura, chest wall, or mediastinum) |
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Term
| Signs of lung collapse, and how to distinguish from effusion or mass |
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Definition
| Mediastinum shifts to the side of collapse and opacification of that lung occurs. In effusion or a mass, the mediastinum would remain in center or shift in opposite direction |
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Term
| Unique characteristic of upper lobe collapse |
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Definition
| has pancake like opacity from lateral view |
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Term
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Definition
| collapse of a lung due to air in the pleural space. It can be spontaneous or traumatic. to find it, look for a lung edge. |
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Term
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Definition
| When air enters pleural space during inspiration but cannot leave during expiration. The mediastinum and trachea shift away from the collapsed lung, and the ipsilateral hemidiaphragm is depressed. Also, the black lung is usually very large |
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Term
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Definition
| when the heart is enlarger |
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Term
| Previous asbestos exposure |
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Definition
| Causes bilateral pleural plaques |
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Term
| Diffuse pulmonary metastasis |
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Definition
| CT shows innumerable small nodules in both lungs |
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Term
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Definition
| causes "silhouette sign", where the normal margin of lung is obscured due to an area of increased density |
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Term
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Definition
| shows black spaces on CT instead of dark gray. Frontal x-ray shows flattening of the diaphragm and hyperinflation of the lungs. |
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Term
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Definition
| Fluid in the lungs. Blunts the costophrenic angle, causing hemidiaphragm to be smooth all the way across. |
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Term
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Definition
| protrusion of the chest wall |
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Term
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Definition
| "caved-in" appearance of the anterior chest wall |
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Term
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Definition
| when a person's organs are reversed from their normal positions |
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