Contrast phases

Last revised by Andrew Murphy on 23 Mar 2023

Citation, DOI, disclosures and article data

Citation:

Murphy A, Er A, Contrast phases. Reference article, Radiopaedia.org (Accessed on 18 Apr 2024) https://doi.org/10.53347/rID-94732

DOI:

https://doi.org/10.53347/rID-94732

Permalink:

https://radiopaedia.org/articles/94732

rID:

94732

Article created:

13 Nov 2021, Andrew Murphy ◉

Disclosures:

At the time the article was created Andrew Murphy had no recorded disclosures.

View Andrew Murphy's current disclosures

Last revised:

23 Mar 2023, Andrew Murphy ◉

Disclosures:

At the time the article was last revised Andrew Murphy had no financial relationships to ineligible companies to disclose.

View Andrew Murphy's current disclosures

Revisions:

5 times, by 2 contributors - see full revision history and disclosures

Sections:

Radiography

Synonyms:

contrast timing

Contrast phases are terms used to describe different stages of contrast enhancement to blood vessels, following the introduction of a pressure injected intravenous (IV) contrast agent such as iodine in CT.

Typical phases (time from injection) include:

early arterial phase
- 15-25 seconds post-injection
- immediately post bolus tracking
late arterial phase
- 30-40 seconds post-injection
- 15-20 seconds post bolus tracking
portal venous phase
- 70-90 seconds post-injection
- 50-70 seconds post bolus tracking
nephrogenic phase
- 85-120 seconds post-injection
- 80 seconds post bolus tracking
excretory phase
- 5-10 minutes post-injection