Optimization of Thoracic Aortic MRI Acquisition Sequences for the Quantification of Diagnostic-assisting Biomarkers

Study Overview
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Brief Summary
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The main objective is to optimize MRI acquisition and image post-processing protocols in order to define the best compromise between short scan time and image quality (contrast between different tissues, spatial and temporal resolutions) high enough to accurately measure morphologic, hemodynamic and structural aortic biomarkers.

Detailed Description
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This Magnetic Resonance imaging study of the thoracic aorta aims to: 1- enhance patient comfort during the examination, shorten appointment waiting times and overall reduce MRI cost, and 2- provide a reliable diagnosis and risk assessment of aorta-related diseases occurring in hypertension, obesity or diabetes but also throughout normal aging. The impact of MRI acquisition innovations on the measurement of biomarkers that are extracted from image post-processing software and therein on disease characterization (normal values, severity thresholds, etc.) must be systematically reevaluated. More specifically, the investigators design image acquisition and automated image processing methods to reduce operator variability. This study will optimize thoracic aortic MRI acquisition sequences for the quantification of diagnostic-assisting biomarkers in a healthy population.

Official Title
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Optimization of Thoracic Aortic MRI Acquisition Sequences for the Quantification of Diagnostic-assisting Biomarkers (SEQUOIA)

Conditions
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Healthy Volunteers

Intervention / Treatment
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* Other: MRI calibration


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subject aged between 20 and 35 or between 50 and 70 (limits included) BMI < 30 kg/m² Asymptomatic subject Having given informed, free and written consent Affiliated to a French social security scheme or entitled Exclusion Criteria: Contraindication to MRI (claustrophobia, presence of a metallic foreign body) Pregnant or breastfeeding woman Known cardiac pathology Personal cardiovascular history Person deprived of liberty by court decision or benefiting from legal protection (under guardianship or curatorship) Abuse of alcohol or narcotics Subject under AME Participation in another interventional research involving the human person or being in the exclusion period at the end of a previous research involving the human person

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: healthy volunteers<br> | Other: MRI calibration<br>* Non-injected thoracic aorta MRI calibration<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Parametric measurement of thoracic aorta values of normal subjects | Thoracic aorta values measured by MRI | 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Quantitative fibrosis within the aortic wall (%) |  | 24 months | 
| Quantitative fat within the aortic wall (%) |  | 24 months | 
| Quantitative periaortic fat (g and g/m², when indexed to BSA) |  | 24 months | 
| ROC metrics will be used to compare the various sequences (%) |  | 24 months | 
| Quantitative flow values within the different aortic segments and the main branches (mL) |  | 24 months | 
| Correlation coefficients will be estimated to assess the associations between novel and conventional biomarkers |  | 24 months | 
| Intra and inter-reproductibility of aortic measures will be assessed (intra-class correlation coefficients) |  | 24 months | 
| Intra and inter-reproductibility of aortic measures will be assessed (Bland and Altman metrics) |  | 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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MRI, thoracic aorta, acquisition calibration, biomarkers