Water flush technique: a noninvasive method of optimizing visualization of the distal esophagus in patients with primary achalasia.
Hansford BG, Mitchell MT, Gasparaitis A. Water flush technique: a noninvasive method of optimizing visualization of the distal esophagus in patients with primary achalasia. AJR Am J Roentgenol. 2013 Apr; 200(4):818-21.