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MR angiography of the central nervous system. Basic flow phenomena
1Magnetic Resonance Imaging Center, Long Beach Memorial Medical Center, California, USA.
Magnetic Resonance Imaging Clinics of North America
|August 1, 1995
Summary
Understanding magnetic resonance (MR) flow physics is essential for interpreting MR angiography and its artifacts. This knowledge aids in comprehending flow-related enhancement and even echo rephasing phenomena in MR imaging.
Area of Science:
- Physics of Magnetic Resonance Imaging (MRI)
- Medical Imaging Techniques
- Fluid Dynamics in Biological Systems
Background:
- Magnetic Resonance (MR) angiography is a vital non-invasive imaging modality.
- Artifacts in MR angiography can complicate interpretation.
- A fundamental understanding of MR flow physics is often lacking.
Purpose of the Study:
- To provide a foundational understanding of the physics of MR flow.
- To explain key concepts like flow-related enhancement and even echo rephasing.
- To elucidate the physical basis of MR angiography techniques.
Main Methods:
- Review of fundamental MR physics principles related to fluid flow.
- Explanation of concepts like time-of-flight (TOF) MR angiography.
- Discussion of phase contrast MR angiography principles, including even echo rephasing.
Main Results:
- Detailed explanation of flow-related enhancement in TOF MR angiography.
- Elucidation of even echo rephasing principles in phase contrast MR angiography.
- Correlation of physical principles with observed flow phenomena in routine MR images.
Conclusions:
- A strong grasp of MR flow physics is critical for accurate MR angiography interpretation.
- Understanding these principles helps in identifying and mitigating artifacts.
- This knowledge enhances the diagnostic utility of MR angiography for flow dynamics.