What is the difference between gastrography and gastroscopy?

Gastroscopy is a method of

direct observation of the gastrointestinal tract through the esophagus, stomach and duodenum using a thin tube. It can remove suspected lesions and perform pathological biopsy and cytological examination to confirm the diagnosis of diseases. Clinically, it is suitable for people with upper gastrointestinal bleeding whose lesions cannot be determined by barium radiography

.