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Automatic in-plane rotation for doubly-oblique cardiac imaging
Peter Kellman1, J Andrew Derbyshire, Elliot R McVeigh
1Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA. kellman@nih.gov
Journal of Magnetic Resonance Imaging : JMRI
|October 28, 2003
Summary
This study presents an automatic method for in-plane rotation in doubly-oblique imaging to reduce artifacts. The technique is effective for cardiac imaging, especially with accelerated imaging methods like SENSE.
Area of Science:
- Medical Imaging
- Image Processing
- Cardiovascular Imaging
Background:
- Doubly-oblique imaging geometry is crucial for cardiac applications.
- Minimizing wrap artifacts is essential for accurate image interpretation.
- Accelerated imaging techniques like SENSE benefit from optimized slice geometry.
Purpose of the Study:
- To develop and validate an automated method for calculating in-plane rotation.
- To minimize wrap artifacts in doubly-oblique imaging for a defined field of view (FOV).
Main Methods:
- Formulated equations for in-plane rotation in doubly-oblique imaging of elliptical cylindrical bodies.
- Implemented and tested an automatic in-plane rotation algorithm on a commercial scanner.
- Utilized nominal ellipticity values for body cross-sections.
Main Results:
- Acquired short-axis, doubly oblique cardiac images with and without in-plane rotation.
- Demonstrated that in-plane rotation is largely insensitive to body ellipticity.
- Confirmed the feasibility of an automatic solution using a nominal value.
Conclusions:
- In-plane rotation is beneficial for doubly-oblique imaging, particularly in cardiac applications.
- The developed method provides an effective approximate solution for automatic in-plane rotation.
- This technique is especially valuable for reduced-FOV accelerated imaging like SENSE.