Figure 9.

Dual-energy computed tomography in a patient with chronic thromboembolic pulmonary hypertension. (a) Pouch sign on the right upper pulmonary artery on a pulmonary angiogram and corresponding defect on the dual-energy computed tomography image. (b) Fused-perfused blood volume images generated by fusion of the anatomic and perfused blood volume datasets. This allows correlating anatomic and functional information. The pouch defect is again seen with corresponding wedge-shaped perfusion defect