CT Scan of the Shoulder, Low-Contrast Protocol
A low-contrast CT scan of the shoulder creates detailed cross-sectional images to evaluate the bones, joint, and surrounding tissues.
["This imaging test can help identify shoulder injuries and other structural abnormalities that may be causing pain or limited movement."]
Key facts at a glance
- LOINC
- 38828-0
- Short code
- CT Should-L W contr IS
- Synonyms
- CT Should-L W contr IS
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0
- Ref high
- 100
- Critical range
- 0.1 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- CPT
- 83721
- SNOMED
- 113079007
- 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 this test?
A shoulder CT scan uses X-rays and a computer to create detailed images of the shoulder joint, bones, and nearby soft tissues. The low-contrast protocol refers to the imaging technique requested by your clinician.
Why might I need this test?
A CT scan may be recommended to evaluate shoulder pain, swelling, or limited movement. It can help assess fractures, bone alignment, joint abnormalities, or certain soft-tissue problems, especially when other imaging tests have not provided enough information.
How is the test performed?
You will lie on a padded table while the CT scanner rotates around the affected shoulder. You should remain still during the scan. If the ordered protocol includes intravenous contrast, a contrast injection may be used; the technologist will explain the procedure before it begins.
How do I prepare for the test?
Follow the preparation instructions provided by the imaging center, particularly if intravenous contrast may be used. Remove jewelry and other metal objects from the shoulder area and tell the staff about allergies, kidney disease, or pregnancy if relevant.
Reference range
Optimal: <100 mg/dLN/A
Fasting for 12-14 hours preferred. Water is permitted. Avoid alcohol for 24 hours before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may include a fracture, altered bone alignment, joint degeneration, fluid collections, or a mass involving the shoulder. The radiologist will interpret the images together with your symptoms, examination, and other tests. A normal scan does not exclude every minor injury or cause of shoulder pain.
Short name
Shoulder CT Scan
Frequently asked questions
Does a low-contrast CT scan mean I will not receive contrast dye?
Is the CT scan painful?
Will I be able to drive home afterward?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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