Measuring the long diameter of the esophageal hiatus using axial CT images

According to the American Foregut Society, the antireflux barrier consists of three main components: the crural diaphragm, the lower esophageal sphincter (LES), and the gastroesophageal flap valve. The intraabdominal esophageal length and an acute angle of His are both integral to an intact flap valve [1]. Correspondingly, antireflux surgery aims to restore this barrier through three principal procedures: (1) hiatal hernia repair to reestablish the intraabdominal esophageal length; (2) crural cl…

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