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CT-Guided Aspiration or Biopsy with Intravenous Contrast

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

A CT-guided procedure to obtain tissue or fluid for examination; intravenous contrast may be used to identify the target and guide needle placement.

Quick summary

["This CT-guided procedure collects tissue or fluid so a suspicious area can be examined for a diagnosis."]

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

Key facts at a glance

LOINC
25041-5
Short code
CT Guided Asp or Bx--W contr IV
Synonyms
CT Guided Asp or Bx--W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
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 minimally invasive procedure in which a needle is directed into the body using CT scans. A sample of tissue or fluid is taken for laboratory evaluation, and intravenous contrast may be used to help show the target area and guide the needle.

Why might I need this test?

A CT-guided aspiration or biopsy may be recommended when imaging shows an unexplained lump, lesion, fluid collection, or area of abnormal tissue. The sample can help doctors investigate possible infection, inflammation, cysts, or cancer.

How is the test performed?

You will usually lie in the CT scanner while the clinician identifies the correct location. After the skin is numbed, a thin needle is inserted under CT guidance to collect fluid or remove a small piece of tissue. The samples are then sent to a laboratory for examination.

How do I prepare for the test?

Follow the preparation instructions provided by the imaging facility. Tell the care team about contrast allergies, kidney disease, pregnancy, bleeding problems, and medicines such as blood thinners or diabetes medications; do not stop or change any medicine unless instructed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT-guided aspiration/biopsy

Frequently asked questions

Is this considered surgery?
Usually not. The procedure generally uses a small needle rather than an incision, although complications such as bleeding or infection can occur.
Why is intravenous contrast used?
Contrast can improve the visibility of blood vessels and nearby structures on CT images, helping the clinician guide the needle safely and accurately.
What should I watch for after the procedure?
Some soreness, bruising, or minor bleeding at the needle site is common. Contact your care team for fever, worsening pain, significant bleeding, or other concerning symptoms.
  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 16, 2026. · Read our editorial policy