Figure 4.

Assessment of the pulmonary volume. Transversal SSFP CMR was undertaken covering the entire lung field with the patient in functional end-expiratory state. The pulmonary volume was measured by planimetry in each slice, typically 50–60 slices. The figure illustrates a single representative transverse slice through the thorax. The red region of interest illustrates the region included in the pulmonary volume in this slice. The delineated area includes the functional residual capacity, the pulmonary parenchyma, and the pulmonary vessels within the lung parenchyma, but excluding the greater proximal pulmonary vessels and the aorta.