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A MRI bolus tagging method for observing helical flow in the descending aorta
A K Hoydu1, P D Bergey, J C Haselgrove
1Department of Radiology, Children's Hospital of Philadelphia, Pennsylvania 19104.
Magnetic Resonance in Medicine
|December 1, 1994
Summary
This study introduces a novel MRI technique to visualize helical blood flow in the aorta. The method successfully captures complex flow patterns, including twist and reversal, in healthy individuals.
Area of Science:
- Cardiovascular Imaging
- Biomedical Engineering
- Medical Physics
Background:
- Helical blood flow in the aorta is crucial for cardiovascular health.
- Understanding aortic flow dynamics aids in diagnosing vascular conditions.
- Current imaging methods have limitations in fully characterizing helical flow patterns.
Purpose of the Study:
- To develop and validate a magnetic resonance imaging (MRI) bolus tagging technique.
- To explore and visualize the helical nature of blood flow within the aorta.
- To assess the feasibility of this method in healthy adult and pediatric populations.
Main Methods:
- A novel MRI bolus tagging sequence was designed.
- Two distinct image series were acquired: one for longitudinal flow and one for rotational flow.
- The protocol was tested in healthy adult volunteers and children with normal vasculature.
Main Results:
- The MRI technique allowed for immediate visualization of individual helical flow patterns.
- The method successfully demonstrated variations in helical twist, including rapid twist, absence of twist, and reversal of twist.
- The protocol proved effective in both adult and pediatric subjects.
Conclusions:
- This MRI bolus tagging method provides a powerful tool for exploring aortic helical blood flow.
- The technique offers immediate and detailed insights into complex flow dynamics.
- It has potential applications in the assessment of various cardiovascular and vascular diseases.