Apical segment of the CPD (white) and the ED (red) in patient 4. Images in the upper row are side views, while those in the lower row are views from the base. The ED was displayed simultaneously with the CPD (a, c, e, g) and alone (b, d, f, h). (c, d, g, h) The density profiles of ED are shown in yellow, white and blue according to density ratios between ED and CPD of >1, 1 and <1, respectively. Scale bars = 1 mm.