Aortic stenosis: Aortic valve area (AVA) sizing by CT. Using 3-multiplanar reformations (MPR), from left sagittal oblique (left) and left coronal oblique (right) views, a cross-sectional view of the aortic valve is generated (lower mid image). The white line indicates the plane of the cross-sectional axial oblique view in the low midimage inlay, which allows quantification of the inner aortic valve orifice area (AVA) (pink arrows). This area is traced by a digital caliper and reflects a marker for the severity of aortic stenosis (<1 cm2: severe critical). Valve morphology was bicuspid (fused raphe).
