Final answer:
In suspected small bowel obstruction cases, an Abdominal X-ray is commonly performed first, but a CT scan provides more detailed information and can confirm the diagnosis and evaluate the severity.
Step-by-step explanation:
In the case of a suspected small bowel obstruction, an Abdominal X-ray is often the initial imaging study performed. This X-ray can reveal signs of obstruction, such as dilated loops of small bowel, air-fluid levels, and the absence of gas in the colon. However, a Computed tomography (CT) scan provides more detailed information and can better evaluate the location and cause of the obstruction. A CT scan constructs detailed cross-sectional X-ray images of the abdominal organs, which is especially useful for identifying the severity of an obstruction, any complications like strangulation, and other alternative diagnoses that could mimic bowel obstruction symptoms. Sometimes, a contrast agent like barium sulfate may be used to improve visualization of the gastrointestinal tract. This contrast is either swallowed (termed a barium swallow) or introduced via an enema (barium enema), and can enhance the X-ray or CT images obtained.