Decreasing the amount of contrast medium during aortic CT angiography

Decreasing the amount of contrast medium during aortic CT angiography - Aortic CTA by double ROI timing bolus method

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000030497

Enrollment

Registered

2017-12-21

Start date

2018-02-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Aortic aneurysm, aortic dissection

Interventions

Perform CT angiography of the aorta with 40 ml of contrast medium. From Jul 25, 2018, the amount of contrast medium will be adjusted by the time density curve and the tube voltage.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients suspected of aortic aneurysm or dissection.

Exclusion criteria

Exclusion criteria: 1. Severe renal dysfunction 2. Allergy to contrast medium 3. Unable to place a 20-gauge catheter 4. Peak enhancement <100 HU during test scan or peak not detectable (From Jul 25, 2018, the amount of contrast medium would be increased when the peak enhancement is low.)

Design outcomes

Primary

Measure	Time frame
To test whether the attenuation of the aorta would improve in spite of reducing the amount of contrast medium.	—

Secondary

Measure	Time frame
Subjective analysis of the aorta and its branches.	—

Countries

Japan

Contacts

Public ContactNobuo Tomizawa

New Tokyo Hospital Department of Radiology

tomizawa-tky@umin.ac.jp+81-477118700

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026