Abdominal plain film is a photograph of the abdomen taken without introducing any contrast. When a certain organ is calcified due to disease or has X-ray foreign bodies, stones, or free gas in the abdominal cavity, the gas and liquid in the intestinal cavity increase. When the intestines are dilated, the difference in density will appear and appear on the photo.

Basic Information

Specialist classification: Digestive examination classification: X-ray

Applicable gender: whether men and women apply fasting: fasting

Tips: Pregnant women are not suitable for this check. Normal value

Abdominal photos have no unusual shadows.

Clinical significance

Abnormal results:

(1) Digestive tract perforation caused by digestive tract tumors, inflammation, and trauma.

(2) intestinal obstruction, and can be identified as mechanical intestinal obstruction or paralytic or strangulated intestinal obstruction.

(3) Peritonitis.

(4) abdominal abscess.

(5) abdominal mass.

(6) Stones that are not transparent to the X-ray of the digestive tract.

(7) Abnormal calcification of the abdomen, such as calcification of abdominal lymphatic calcification and hepatic hydatidosis. The spleen, kidney, adrenal gland, pancreas and other organs can be calcified when there are tumors, tuberculosis, parasites and inflammation, and the diagnosis can be made according to the morphology and location of calcification.

(8) The contour, position and size of the intra-abdominal organs (liver, kidney, spleen, etc.) can be observed. For example, liver tumors, hydatidosis, cysts and the like can change the contour of the liver and its volume can be increased. Renal hydronephrosis, polycystic kidney disease, and renal tumors can increase renal shadow. Renal dysplasia and renal artery stenosis can reduce renal shadow.

(9) According to whether the lumbar muscle image is swollen, fuzzy, lumbar vertebrae with or without lateral curvature, vertebral bone destruction or not to diagnose lumbar tuberculosis, perirenal abscess.

(10) Abdominal plain film also has great significance for the diagnosis of neonatal gastrointestinal malformations. If the esophagus is locked, there may be no gas in the gastrointestinal tract. When the pylorus is narrow, the stomach expands and the gas is inflated, and there is little or no gas in the intestine. In the congenital small intestine stenosis, the intestines above the occlusion are inflated and have a fluid level, while there is no gas in the intestines. Both anal atresia and fecal peritonitis can be seen on plain abdominal films.

(11) The plain film can observe the position, shape, size and number of the fetus.

(12) Observe whether the metal contraceptive ring exists, its position and shape, and so on.

People who need to be examined often have abnormal pain in the abdomen, and middle-aged and elderly people.


Contraindications before the examination: 3 days before the filming, it is not advisable to use X-ray developed drugs, such as iron, iodine, barium calcium and other preparations, as well as drugs that are not easily dissolved. The activated carbon tablets were taken 2 days before the test to absorb the gas in the intestines. Take a laxative the night before the test to help with bowel movements. Check the morning fast and try to empty the stool. There are ureteral stones, which may not be obvious due to the influence of stool, so the cleansing enema is given before the flat film is taken.

Requirements for inspection: Relax and listen to the doctor's instructions.

Inspection process

The abdominal plain film was photographed at one time in the anteroposterior position, the erect lateral position, the supine anteroposterior position, the lateral horizontal position and the supine horizontal lateral position.

Not suitable for the crowd

Taboo people: pregnant women.

Adverse reactions and risks