Fig. 1

Presents the LA phantom shapes and the corresponding acquisition strategies that were utilized for the assessment of the CS-cineCMR sequence and reconstruction methods. The mitral valve is represented by the fading gray shape on the right. The large and small volumes of shapes a and b correspond to systolic and diastolic phases, respectively. Shape c represents a LA with oblique connection to the LV, which is occasionally found in patients with a hypertrophied LV and/or obesity. Phantom shape e (=curved) mimics impression of an enlarged LA by the aortic root. To complete the spectrum of LA shapes a spherical phantom (d) was also analyzed. a) Oval Big (= LA at end-systole), b) Oval small (=LA at end-diastole), c) Oval oblique, d) Spherical and e) Curved (=LA compression by aortic root). Row 1 corresponds to long-axis acquisitions aligned with the long-axis of the atrium (and with short-axis planes perpendicular to acquisition long-axis). Row 2 corresponds to long-axis acquisitions aligned with the long-axis of the atrium, but with short-axis planes non-perpendicular to the atrium long-axis. Row 3 corresponds to long-axis acquisitions not-aligned with the long-axis of the atrium and with short-axis planes perpendicular to the acquired long-axis