CT Scan of the Abdomen and Pelvis: What to Expect

What areas are examined and why

A CT scan of the abdomen and pelvis produces cross-sectional images of structures between the lower chest and pelvis, depending on the protocol. It can show organs such as the liver, gallbladder, pancreas, spleen, kidneys, bowel and bladder, as well as lymph nodes, bones and blood vessels. The exact coverage depends on the clinical question and the instructions provided by your doctor.

An abdomen and pelvis CT may be considered for selected causes of persistent or unexplained pain, suspected kidney stones, some bowel or urinary problems, inflammation, injury, masses or follow-up of a known condition. It can also support planning before or after some operations. The scan is not a universal test for every abdominal symptom; examination, blood tests, ultrasound or other investigations may be more appropriate in some cases.

Stomach CT, abdomen CT and pelvis CT: are they different?

People often say “stomach CT” when they mean a scan of the abdomen, but the stomach is only one organ within the abdomen. A request for an abdomen and pelvis CT may include a broader region than a scan focused on one specific question. The protocol determines which areas are covered and whether contrast is required.

That distinction matters because the scan should match the clinical question. A patient with a suspected kidney stone may need a different protocol from someone being investigated for bowel inflammation or a known tumour. If you have been told you need a CT, ask your doctor or provider to confirm the exact examination and whether it includes the abdomen, pelvis or both.

Why contrast may be used

Contrast can help the radiologist distinguish organs, blood vessels and areas of inflammation or abnormal tissue. It may be injected into a vein, swallowed as a drink, or used in another way depending on the protocol. Some CT examinations are performed without contrast, so it should not be assumed that every patient needs an injection.

Tell the team about kidney problems, diabetes, medicines, a previous reaction to contrast and any other relevant medical history. The provider may need to review kidney function or other factors before deciding whether contrast is suitable. If you are pregnant or might be pregnant, tell the team before the scan. Follow the specific preparation instructions you receive.

Preparation and what happens in the scanner

Preparation depends on the protocol. You may be asked to avoid food for a specified period, drink a contrast solution or arrive early for checks. Do not fast or stop medication unless your provider instructs you to do so. If you have diabetes or take medicines that need food, clarify the plan in advance. Bring any requested referral details and previous imaging reports.

During the examination, you lie on a table that moves through a wide, ring-shaped scanner. It is not a long tunnel like a traditional MRI. The radiographer may ask you to hold your breath for a few seconds to reduce movement. The scan itself is usually brief, although preparation and contrast checks can make the overall appointment longer.

Radiation, safety and alternatives

CT uses ionising radiation. The amount varies with the area and protocol, and the decision to perform the scan should weigh the expected benefit against the potential risk. If you have had recent imaging of the same region, mention it. If pregnancy is possible, tell your doctor before the appointment so they can assess the safest suitable investigation.

Depending on the question, alternatives may include ultrasound, MRI, an X-ray or clinical monitoring. Ultrasound can be useful for some gallbladder, pelvic or urinary questions; MRI may be useful for selected soft-tissue concerns; CT may be preferred when a fast, broad view of internal structures is needed. No alternative is best for every situation, so the choice should be based on symptoms and clinical assessment.

Understanding the report and next steps

The radiologist reviews the images and writes a report that describes the findings. The report may identify a likely explanation for symptoms, show no significant abnormality, or note an unexpected finding that needs follow-up. Sometimes the scan cannot fully answer the question and another test is suggested. A report should be interpreted alongside symptoms, examination and any blood tests or earlier imaging.

PrivateScans includes the consultant radiologist's report, digital access to the images and report, pre- and post-scan GP consultations, referral where clinically appropriate and Patient Care Team support in the scan price. The initial £25 consultation is deducted from the total scan cost if you proceed. Results are returned within 3 days of the scan. Severe or rapidly worsening abdominal pain, collapse or significant bleeding needs urgent medical assessment rather than a routine booking.

Examples of questions an abdomen and pelvis CT may investigate

Depending on the clinical context, an abdomen and pelvis CT may be used to assess suspected kidney stones, selected causes of severe or persistent abdominal pain, inflammation, bowel-related problems, some injuries, masses or known conditions that need staging or follow-up. It can also show bones and some blood-vessel structures in the area. The scan does not identify every cause of pain and may be normal even when symptoms are genuine.

The report may describe organs that appear normal as well as findings relevant to the original question. Sometimes an unexpected finding is noted in an area that was not the main reason for the scan. The radiologist may recommend comparison with previous imaging or further tests if the appearance cannot be fully characterised on CT alone.

An abdominal CT should be chosen for a clear reason because it uses ionising radiation and may involve contrast. If symptoms are mild or the likely cause is better assessed by another test, Our doctor may recommend a different approach. If pain is severe, rapidly worsening or associated with collapse, significant bleeding or other alarming symptoms, seek urgent medical care rather than arranging a routine scan.