Ventilation-Perfusion Scan and Angiography

Figure 1a. Ventilation-Perfusion Scintigraphy--High Probability for Acute Pulmonary Embolism

Posterior ventilation image shows homogeneous tracer distribution.

defect1defect2

Figure 1b. Ventilation-Perfusion Scintigraphy--High Probability for Acute Pulmonary Embolism

Posterior perfusion image shows wedge-shaped, peripheral areas of decreased perfusion (especially well seen in the right lung), consistent with pulmonary embolism.

Find 2 regions of decreased perfusion in the right lung.

embolus1embolus2

Figure 2. Angiogram of PE

Angiography shows intraluminal filling defects within the segmental vasculature of the lower lobe.

Find 2 filling defects.

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Perfusion defect

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Filling defect representing embolus

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