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Chest X-ray with Abdomen (Supine Position) – Abdominal Plain Radiograph (AP)

Published: August 9, 2026Updated: August 16, 2026

This test involves taking an X-ray image of your chest and abdomen while you lie on your back. It helps doctors examine your organs, bones, and tissues for any abnormalities.

Quick summary

["An abdominal X-ray can detect issues like blockages, infections, or structural problems in your digestive system and organs."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
43786-3
Short code
Deprecated Abd+Chest XR AP(supKUB+Upr)+P
Synonyms
Deprecated Abd+Chest XR AP(supKUB+Upr)+P
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

An abdominal X-ray captures images of your internal structures, including your intestines, kidneys, spine, and abdominal organs. It uses low-dose radiation to create detailed pictures that can show differences in tissue density. This helps identify potential problems such as blockages, foreign objects, or unusual growths.

Common Uses and Indications

Doctors may order this test to investigate symptoms like unexplained abdominal pain, signs of bowel obstruction, suspected kidney stones, or other gastrointestinal concerns. It’s also used before surgeries or procedures to assess your anatomy.

How the Test Is Performed

You’ll lie on an X-ray table while the technician positions your body to get clear images of your chest and abdomen. A special plate or film captures the images. You may need to hold your breath briefly during the exposure. No special preparation is usually required, but fasting may be advised if further testing (like a contrast study) is planned.

Preparation and Safety

No special preparation is typically needed, but you should inform your doctor about any allergies, pregnancy, or recent surgeries. If you’re pregnant, you’ll be asked to avoid this test unless absolutely necessary due to radiation exposure risks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

Why might this test be important?
This test provides a broad overview of your abdominal and thoracic anatomy. It can reveal issues like bowel obstructions, kidney stones, hernias, or signs of infections (e.g., appendicitis). While it’s not as detailed as other imaging tests, it’s a quick and cost-effective way to identify potential problems that may require further investigation.
How long will I need to wait for results?
Results from an abdominal X-ray are usually available within a few hours to a couple of days, depending on your healthcare provider’s workflow. If your doctor orders additional tests or reviews the images, the wait time may vary.
Can I eat or drink before this test?
Generally, no special dietary restrictions apply unless your doctor advises fasting for a contrast-enhanced version of this test. However, always follow your healthcare provider’s instructions for the best results.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy