MCE-new for Detection of Gastric Lesions

Inclusion Criteria: * underwent gastric examination; * At least 18 years old； * Be able to provide informed consent. Exclusion Criteria: * With swallowing obstruction or disorders; * With known or suspected gastrointestinal obstruction, stenosis and fistula; * Have no conditions for surgery or refuse to undergo any abdominal surgery; * Be allergic to or have other known contraindication or intolerance to the drug used in the study; * With pacemakers or other electronic devices such as electronic cochlear implants, implanted magnetic metal drug infusion pumps, neurostimulators, and magnetic metal foreign bodies; * Women during pregnancy; * Currently enrolled in another clinical trial of a drug or device; * Other conditions determined by the investigator to be inappropriate for enrollment.