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A demonstration of A3. Stasis of a barium meal over the platform of the medial fundus in air-fluid level appearance; the horizontal line of the platform (concave up shape) is approximately 4.8 cm in length of the medial fundus; the angle of the medial fundus axis and the body axis of the stomach is 53.4 °. The maximal radius of the proximal stomach (fundus) is 11 cm in length.
