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| Concerning CT pulmonary |
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| angiography: (T of F) |
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| 1. | Single detector
helical scanners perform |
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| as well as
multislice scanners. |
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| 2. | Emboli are
detected as filling defects |
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| within the
pulmonary arteries. |
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| 3. | It can be
performed without intravenous |
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| contrast in
patients with renal failure. |
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| 4. | Isolated
subsegmental emboli are |
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| commonly seen. |
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