Comparison of different techniques and different scanner types for visualization and quantification of aortic blood flow by cardiovascular magnetic resonance

ISRCTN ISRCTN37755721
DOI https://doi.org/10.1186/ISRCTN37755721
Secondary identifying numbers 4D Comparison (internal study code)
Submission date
08/02/2018
Registration date
15/03/2018
Last edited
17/06/2025
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Other
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
Two-dimensional flow imaging in cardiac (heart) MRI is a standard technique and well established. However, it only measures blood flow volumes in one cross-sectional plane of the aorta, so it cannot give information about wall shear stress or maximum velocity. A newly developed sequence for cardiovascular MRI can be used to measure blood flow and its impact on surrounding tissue in three dimensions and over time (i.e. over one cardiac cycle) - the common name for the sequence is therefore 4D-Flow. Blood flow pattern, volume and velocity can all be measured. The wall-shear stress of the aorta (the largest artery) can be examined, showing where the aorta is affected and altered by cardiac pathology (heart disease). Different types of this sequence have been developed, and it can be used at MRI scanners of different field strengths. It is important to know whether there are differences in the results when using different sequences or MRI scanners. The aim of this study is to compare three different sequences and three different field strengths in healthy volunteers, and to compare all 4D-Flow exams to the reference of two-dimensional flow measurement.

Who can participate?
Healthy volunteers, aged over 18

What does the study involve?
Three different sequences and three different field strengths are compared in healthy volunteers. All 4D Flow scans are assessed to measure blood flow in the thoracic aorta, wall shear stress and peak velocity, and are compared with two-dimensional flow measurement.

What are the possible benefits and risks of participating?
Cardiac MRI is considered the gold standard for measuring heart function. Participants may benefit from a thorough, high-level examination of the heart. Results can - upon request - be made available to the participant. Any incidental pathological findings are communicated with the participant as well. Future patients may benefit from a useful diagnostic tool in clinical routine. 4D Flow has been proven to provide additional information in certain pathologies and can help with guiding treatment. Standardization of the technique is crucial for its use in clinical routine. The risk of an MRI exam are generally small (seldom temporary dizziness and light flashes, ending with leaving the MRI scanner). The biggest risk centers around the fact that a magnetic field is induced to gather the images. Therefore, metallic (magnetic) objects are of risk, including objects within the body such as implants. This is a general limitation for the use of MRI and is therefore also applied in this study. People with any kind of implant or metal within or on the body cannot participate.

Where is the study run from?
Charité University Medicine Berlin (Germany)

When is the study starting and how long is it expected to run for?
June 2016 to March 2018

Who is funding the study?
Charité University Medicine Berlin (Germany)

Who is the main contact?
Prof. Jeanette Schulz-Menger

Contact information

Prof Jeanette Schulz-Menger
Scientific

Charité University Medicine Berlin Campus Buch
Working Group Kardiale MRT Lindenberger Weg 80
Berlin
1325
Germany

ORCiD logoORCID ID 0000-0003-3100-1092

Study information

Study designObservational feasibility study
Primary study designObservational
Secondary study designFeasibility study
Study setting(s)Hospital
Study typeDiagnostic
Participant information sheet Not available in web format, please use the contact details to request a patient information sheet
Scientific titleImpact of field strength (1.5, 3.0 and 7.0 Tesla) and sequence on quantification of aortic flow volumes, peak velocity and wall shear stress using 4D flow MRI
Study objectivesApplication of different techniques for measurement of haemodynamics in the Aorta ascendens does not have a significant influence on quantitative parameters.
Ethics approval(s)The ethics board of the Charité University Medicine Berlin Campus Mitte:
1. 1.5 Tesla and 3.0 Tesla: 09/11/2012, ref: EA 1/258/12
2. First amendment: 30/05/2014
3. 7.0 Tesla: 25/08/2009, ref: EA 1/054/09
Health condition(s) or problem(s) studiedHealthy volunteers without any known cardiac disease
InterventionThis is an observational study comparing three different techniques of visualization of blood flow in the aorta ascendens at three different cardiac MRI scanners with different field strengths (1.5 Tesla, 3.0 Tesla, 7.0 Tesla) in healthy volunteers. It serves at the same time as a feasibility study of this particular technique at 7.0 Tesla cardiac MRI.

Three different sequences and three different field strengths (1.5 Tesla, 3.0 Tesla and 7.0 Tesla) are compared in 10 healthy volunteers. All 4D-Flow exams are also compared to the reference of two-dimensional flow measurement. All 4D Flow scans are assessed as follows: blood flow in the thoracic aorta is visualized, forward-, backward- and net- flow is quantified. Wall shear stress and peak velocity are visualized and quantified. In the reference two-dimensional flow measurement forward-, backward- and net-flow is quantified.
Intervention typeOther
Primary outcome measureBlood flow volume in the thoracic aorta in each tested MR sequence over one cardiac cycle measured by three-dimensional cardiac magnetic resonance
Secondary outcome measuresVelocity of the blood flow and wall shear stress in the ascending aorta in each tested MR sequence over one cardiac cycle measured by three-dimensional cardiac magnetic resonance
Overall study start date01/06/2016
Completion date31/03/2018

Eligibility

Participant type(s)Healthy volunteer
Age groupAdult
Lower age limit18 Years
SexBoth
Target number of participants10
Key inclusion criteria1. Age > 18 years
2. Written consent
Key exclusion criteria1. Any known cardiac disease
2. Contraindication to CMR
Date of first enrolment01/11/2016
Date of final enrolment31/05/2017

Locations

Countries of recruitment

  • Germany

Study participating centre

Working Group on Cardiovascular Magnetic Resonance, Experimental and Clinical Research Center a joint cooperation between the Charité University Medicine Berlin and the Max-Delbrueck Center for Molecular Medicine, and HELIOS Klinikum Berlin Buch, Department of Cardiology and Nephrology, Berlin, Germany
Lindenberger Weg 80
Berlin
13125
Germany

Sponsor information

Charité University Medicine Berlin
University/education

Working Group Kardiale MRT Lindenberger Weg 80
Berlin
13125
Germany

Website http://www.cmr-berlin.org
ROR logo "ROR" https://ror.org/001w7jn25

Funders

Funder type

University/education

Charité – Universitätsmedizin Berlin
Private sector organisation / For-profit companies (industry)
Alternative name(s)
Medical School - Charité - University Medicine Berlin
Location
Germany

Results and Publications

Intention to publish date12/02/2019
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot expected to be made available
Publication and dissemination planPlanned publication in a high-impact peer-reviewed journal, probably within the next year.
IPD sharing planThe datasets generated during and/or analysed during the current study are not expected to be made available due to data protection laws in Germany. However, upon request methodology and dataset structure can be shared.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Other publications Retrospective analysis using study data to compare the results of two different commercially available software packages and their impact on different hemodynamic parameters 27/09/2024 17/06/2025 Yes No
Results article 04/08/2020 17/06/2025 Yes No

Editorial Notes

17/06/2025: Publication reference added.