The abdominal X-ray findings vary depending on the type of intestinal obstruction. In simple small bowel obstruction, the small intestine appears distended with gas, typically aligned parallel and close together in the upper and middle abdomen, showing multiple step-like air-fluid levels of varying lengths. In adhesive intestinal obstruction, an upright X-ray reveals distended intestinal loops and air-fluid levels. For strangulated intestinal obstruction, an upright X-ray shows fixed, isolated intestinal loops that may resemble a coffee bean, pseudotumor, or petal-like shape, with widened intestinal spaces; additionally, long fluid levels and a sign of jejunoileal transposition may be observed. The X-ray characteristics of paralytic ileus include gas distension in the stomach, small intestine, and large intestine, with more pronounced gas accumulation in the colon.