Fig. 3From: Unenhanced multidetector computed tomography findings in acute central pulmonary embolismThis patient was seen in the emergency department due to hemoptysis, and was diagnosed with an acute pulmonary embolism by CTPA. a A wedged-shaped opacification was seen in the left lower lobe (arrow). b Post-contrast image showed a centrally located embolism surrounded by contrast material (polo mint sign, arrow)Back to article page