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CT Neck and Mediastinum with Intravenous Contrast — Supine

Published: August 9, 2026Updated: August 17, 2026

A CT scan uses multiple X-ray images to examine the neck and chest, including nearby lymph nodes, tissues, blood vessels, and airways.

Quick summary

["This CT scan provides detailed images of the neck and mediastinum to help evaluate masses, lymph nodes, infection, and other structural abnormalities."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
83295-6
Short code
CT Neck+Mediastinum.sup W contr IV
Synonyms
CT Neck+Mediastinum.sup W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 10000 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
CPT
84484
SNOMED
302774002
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?

This is a computed tomography (CT) scan of the neck and mediastinum, the area between the lungs. Intravenous contrast may be used to improve the visibility of blood vessels and certain tissues.

Why might I need this test?

A clinician may order this scan to investigate lumps, enlarged lymph nodes, persistent neck or chest symptoms, infection, airway narrowing, or the extent of a tumor or other abnormal tissue. It may also be used in the evaluation of trauma.

How is the test performed?

You will lie on your back in the CT scanner while the machine takes multiple X-ray images. If intravenous contrast is used, it is usually given through a vein in your arm, and the scan may be repeated after a short delay.

How do I prepare for the test?

Follow the instructions provided by the imaging facility, especially if contrast will be used. Tell the care team about any prior contrast reaction, kidney disease, pregnancy, or possible pregnancy before the scan.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT Neck and Mediastinum with IV Contrast

Frequently asked questions

Is this the same as a routine chest CT?
Not exactly. This exam specifically includes the neck as well as the mediastinum, and intravenous contrast may be administered to improve image detail.
Does the scan use radiation?
Yes. CT imaging uses X-ray radiation, but the scan is generally brief and performed with settings selected to obtain the needed images while limiting unnecessary exposure.
Will I know the results immediately?
A radiologist will interpret the images and send the report to your ordering clinician. Your clinician should explain the findings and discuss any recommended follow-up.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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 17, 2026. · Read our editorial policy