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Chest X-ray with Pneumothorax Detection (Breast Marking)

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

This test involves a chest X-ray to check for air in the chest cavity (pneumothorax) and includes a marker to identify breast tissue for accurate imaging.

Quick summary

["A chest X-ray helps doctors detect hidden air in the chest and ensures breast coverage for clear imaging."]

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

Key facts at a glance

LOINC
39342-1
Short code
Deprecated Chest XR PA+Obl W nipple mark
Synonyms
Deprecated Chest XR PA+Obl W nipple mark
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
3.5
Ref high
5
Critical range
2.5 N/A – 6.5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
CPT
84132
SNOMED
110742001
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 Is a Chest X-Ray for Pneumothorax Detection?

A chest X-ray is a type of imaging test that uses low-dose radiation to create pictures of the chest, including the lungs, heart, and bones. This specific test includes a marker to help identify breast tissue, ensuring the X-ray captures the correct areas without overlap. It’s used to detect if there’s air in the chest cavity (pneumothorax), which can occur due to injuries, medical conditions, or complications from procedures.

Why Might You Need This Test?

You may need this test if you have symptoms like sudden chest pain, shortness of breath, or if a doctor suspects a pneumothorax after a procedure, injury, or other medical condition. It’s also used during certain surgeries or medical evaluations to monitor air leaks or ensure proper imaging alignment.

How Is the Test Performed?

You’ll lie on an X-ray table while a technician positions you and places a marker (often a small radiopaque line) to outline breast tissue. The technician will take X-ray images from different angles to capture the chest area clearly. You may need to hold your breath briefly during the exposure.

What Happens After the Test?

After the X-ray, you can usually return to your normal activities immediately. The images will be reviewed by a radiologist, who will look for signs of pneumothorax or other abnormalities. You’ll receive results from your healthcare provider, who will explain any findings or next steps.

Reference range

Adult: 3.5-5.0 mmol/LN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Detecting a pneumothorax early is critical because untreated air in the chest can cause serious complications, such as difficulty breathing or even collapse of the lung. This test helps doctors diagnose the condition quickly, allowing for prompt treatment, which may include draining the air or monitoring closely. Proper imaging also ensures accurate assessment of breast coverage for further medical decisions.

Frequently asked questions

Will I Feel Any Discomfort?
No, you shouldn’t feel any discomfort during the X-ray. The marker placement is quick and painless. If you’re anxious, let the technician know—they can help position you comfortably.
How Long Will It Take to Get Results?
Results are typically available within 24 to 48 hours, depending on your healthcare provider’s workflow. Your doctor will contact you directly with findings or schedule a follow-up if needed.
Can I Eat or Drink Before This Test?
No special preparation is needed for this test. You can eat, drink, and take medications as usual. However, if you’re scheduled for a procedure that requires fasting, follow your doctor’s instructions separately.
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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