In addition to colonoscopy, intestinal examination can also take laboratory tests and imaging tests, including CT, X-ray barium enema, blood test, stool test, etc. Different tests have different diagnostic value, and there is no such thing as which test is “clearer”, so you should choose the appropriate test under the guidance of a medical professional. 1.CT: It is the most important imaging technology for digestive system, spleen and peritoneal cavity diseases. Plain scanning can detect most of the lesions, but there are some limitations on the characterization of the disease; multi-phase enhancement examination can further improve the detection ability of the lesions. 2. X-ray barium meal contrast: the intestine is a cavity organ, and barium sulfate contrast is the most common imaging method, which can clearly outline the details of the intestinal lumen and inner wall structure, so as to achieve the purpose of disease detection and diagnosis. 3. General blood test: General blood test is a laboratory test for numerical determination and morphological description of some basic indexes of blood components. It can reflect the basic information of the patient’s physiological and pathological state, and is the first examination for clinical disease diagnosis, which can provide clues for further clinical examination. 4. Stool test: It is valuable for understanding whether there is any lesion in the digestive tract and organs leading to the intestines, such as liver, gallbladder and pancreas, and indirectly determining the functional status of the gastrointestinal, pancreatic, hepatic and gallbladder systems. If symptoms of intestinal discomfort occur, you should consult a doctor in time and choose a suitable test under the guidance of the doctor to make a clear diagnosis.