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RAPID--a new method for fast imaging using a single slice of Z-magnetization
W M Brooks1, I M Brereton, D M Doddrell
1Department of Radiology, University of Queensland, St. Lucia.
Magnetic Resonance in Medicine
|August 1, 1987
Summary
High-speed MRI images are generated using a single slice of z-magnetization and sin-sinc pulses. This RAPID imaging method offers improved sensitivity and reduced T1/T2 dependence compared to existing fast imaging techniques.
Area of Science:
- Magnetic Resonance Imaging (MRI)
- Medical Imaging Physics
Background:
- Fast imaging techniques are crucial for reducing motion artifacts in MRI.
- Existing methods like FLASH require continual slice gradient reversal, limiting speed and efficiency.
Purpose of the Study:
- To introduce a novel fast MRI method, RAPID imaging.
- To demonstrate the elimination of slice gradient reversal for enhanced speed.
Main Methods:
- Utilizing a single slice of z-magnetization for image generation.
- Employing two sin-sinc pulses for slice selection.
- Implementing the RAPID imaging technique.
Main Results:
- Achieved high-speed image generation.
- Eliminated the need for continual slice gradient reversal.
- Demonstrated reduced T1 and/or T2 dependence compared to current fast methods.
- Showcased increased sensitivity of the RAPID method.
Conclusions:
- The RAPID imaging method provides a faster and more sensitive alternative for MRI.
- This technique overcomes limitations of existing fast imaging protocols like FLASH.