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Fig. 2 —76-year-old man with dyspnea (New York Heart Association class 3) and chronic thromboembolic pulmonary hypertension. Contrast-enhanced thin-slab maximum-intensity-projection CT image oriented in long axis of right pulmonary artery shows diffuse thickening along pulmonary arterial wall. Proximal thickening (endarterectomy plane) is clearly visible downstream from origin of right interlobar artery. Starting point of endarterectomy plane is origin of right interlobar artery (arrow), which is surgically accessible. Mural thickening varies from 8 mm (interlobar level) to 2.5 mm (lobar level). Endovascular thrombotic material is visible as dark gray mural thickening (arrowheads) responsible for multiple segmental obstructions (asterisk). Excellent endarterectomy plane was found at surgery.