Pulmonary Embolism

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4 Terms

1
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What are the three main signs of pulmonary embolism on a CXR?

Wedge shaped opacity (coagulative necrosis)
Decreased vascularization at periphery causing darkened appearance (oligaemia)
Enlarged pulmonary artery

2
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Describe the findings

Filling defect seen in the right pulmonary artery
Dilated pulmonary trunk (pulmonary hypertension)
Saddle shaped embolism

3
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Describe the findings

Mosaic pattern from attenuation variations
Differences in segment vessel size

4
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How can chronic PE be differentiated from acute PE?

Filling defect forming an obtuse angle with vessel wall
Collateral vessels around descending aorta
Bronchial artery dilation