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Fig. 3 —Histogram shows distribution of clot burden measured with
pulmonary embolism (PE) index. All study patients with PE had low to moderate
clot burden (
50% clot burden). Patients with low clot burden were more
likely to have PE missed at simulated low-dose examination (p <
0.04). Open bars indicate all study patients with PE. Solid bars indicate
patients with PE who had false-negative findings on at least one examination
at any simulated dose level. Each bar represents number of patients.
