Fig. 9From: Detector-based spectral CT with a novel dual-layer technology: principles and applicationsPerfusion imaging with iodine maps. Sagittal iodine overlay image in a patient with acute chest pain shows a wedge-shaped perfusion defect in the right lower lobe (arrow), which is consistent with an acute pulmonary embolism. CTA in this patient (not shown here) did not show the clot clearlyBack to article page