Lim, J H Sonography of the stomach: an in vitro study to determine the anatomic cause of inner hyperechoic and hypoechoic layers of the gastric wall. [electronic resource] - AJR. American journal of roentgenology Feb 1994 - 335-8 p. digital Publication Type: Journal Article ISSN: 0361-803X Standard No.: 10.2214/ajr.162.2.8310921 doi Subjects--Topical Terms: Carcinoma--diagnostic imagingGastric Mucosa--diagnostic imagingHumansPolyps--diagnostic imagingStomach--diagnostic imagingStomach Neoplasms--diagnostic imagingStomach Ulcer--diagnostic imagingUltrasonography