Analysis Of Intracranial Artery Lesions Using 2-D/3D Phase Contrast MR

Study Overview
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Brief Summary
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Using phase contrast MR Angiography with NOVA® Software, this study intends to identify,evaluate and map intracranial aneurysm development as well as develope a predicator for future morphological changes of aneurysms and possible risk of future rupture.

Detailed Description
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Hemodynamic stress toward the wall of intracranial artery with associated genuine defects of wall remodeling capacity is one of many hypotheses of subarachnoid aneurysm development. In addition, hemodynamic stress toward an aneurysm wall may play a very significant role for the rupture of an aneurysm creating acute Subarachnoid hemorrhage. We think the Wall Shear Stress (WSS) measurement toward an intracranial arterial wall and intracranial aneurysmal wall may provide valuable information for understanding of intracranial aneurysm development as well as predicting future morphological changes of aneurysm and possibly risk of future rupture. This study is significant especially in the management of unruptured subarachnoid arterial aneurysm patients and identifying patients who have higher rupture risks for active treatments such as surgical clipping or coiling to prevent unnecessary but potentially risky procedures. Gadolinium MR Angiography with NOVA® Software will be used to measure the arterial wall shear stress (WSS) for patients with an intracranial arterial aneurysm. The aneurysm will be identified, blood flow, velocity, volume, vascular diameter and the direction of blood measurements will be taken using NOVA® Software at each point of interest. A WSS map of target intracranial artery and/or aneurysm sac will be created and matched with morphological features providing a clue to understand the the relationships between hemodynamic parameters, especially WSS and morphological changes.

Official Title
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Hemodynamic Analysis Of Intracranial Artery And Associated Lesions Using 2-D/3D Phase Contrast MR Angiography Focused On Wall Shear Stress Measurement

Conditions
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Intracranial Arterial Aneurysm

Intervention / Treatment
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* Radiation: Additional scan time on standard MR angiography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Unruptured and ruptured adult (>18 years) intracranial arterial aneurysm patients Exclusion Criteria: Less than 18 years old Chronic renal failure patients Incompetent patient who cannot give consent for routine phase contrast MR Angiography and his/her surrogate decision maker is not available Any patients with a contraindication to having a standard MRI examination, such as phase maker, orbital metallic foreign body, etc.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: 2D/3D Phase contrast MR<br> | Radiation: Additional scan time on standard MR angiography<br>* Procedure/Surgery: Additional 5 minutes scan time to standard MR angiography Using the Nova® Software, an additional 5 minutes scan time will be required in order to identify aneurysm, select target artery, and complete measurements Arms:<br>* Other names: 3D MR;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Identify, measure and map the Wall Shear Stress (WSS) measurements and affects in subarachnoid aneurysm developement. |  | Duration of the MRA test | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Develope predictor to identify risk factors of possible future aneurysm rupture and SAH |  | Duration of MRA test | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Intracranial Aneurysm, Subarachnoid arterial aneurysm, Aneurysm, Brain Aneurysm, Cerebral Aneurysm, Wall Shear Stress(WSS), Hemodynamic Stress, Subarachnoid Hemorrhage(SAH)