During the past several years，MCE（magnet controlled endoscopy）has made great process in detecting lesions of gastric as well as screening. Compared with conventional endoscopy, magnetically controlled capsule endoscopy can be further optimized in gastric examination. So we make an AI for operators to help improve the quality of MCE and record the mucosa visibilty of gastirc.

We developed a new artificial intelligence for quality improving during the operation of magnet controlled endoscopy. The AI can help operators screen every part of gastric and then evaluate the visibilty of gastic. Also, It can be record time of the opration. Other than that ,we compared the performancce of AI with experts.

Inclusion Criteria:

• patients between 18 and75
• patients who can sign informed consent

Exclusion Criteria:

• patients who are unsuitable to accept the check

The patients who acccept the magnet controlled capsule endoscopy with the help of "AI-box"will be enrolled.