Inclusion Criteria:  Adult patients aged ≥18. Scheduled to undergo a capsule endoscopy for both stomach and small bowel. Signed the informed consents before joining this study.  Exclusion Criteria:  Dysphagia or symptoms of gastric outlet obstruction Known or suspected GI obstruction, stenosis, or fistula History of upper gastrointestinal surgery or abdominal surgery altering gastrointestinal anatomy Implanted pacemaker, except the pacemaker is compatible with MRI Other implanted electromedical devices or magnetic metal foreign bodies Pregnancy or suspected pregnancy