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Stabilization of echo amplitudes in FSE sequences
Magnetic Resonance in Medicine
|August 1, 1993
Summary
This study presents an algorithm to generate constant signal magnitude echoes in fast spin echo (FSE) imaging by adjusting refocusing pulse angles. This technique improves signal consistency for enhanced FSE imaging applications.
Area of Science:
- Magnetic Resonance Imaging
- Pulse Sequence Design
Background:
- Classical CPMG and fast spin echo (FSE) sequences exhibit signal magnitude variations.
- These variations occur in early echoes when refocusing pulses deviate from 180 degrees.
Purpose of the Study:
- To develop an algorithm for generating constant signal magnitude echoes.
- To design selective pulses for FSE imaging using this algorithm.
Main Methods:
- An algorithm was developed to calculate sequences of nutation angles for refocusing pulses.
- The algorithm aims to maintain constant signal magnitudes across a series of echoes.
Main Results:
- The algorithm successfully generates sequences of nutation angles.
- These sequences yield series of echoes with constant signal magnitudes.
- The results enable the design of selective pulses for FSE imaging.
Conclusions:
- The proposed algorithm effectively addresses signal magnitude variations in FSE imaging.
- This method allows for the creation of more robust and reliable FSE pulse sequences.
- Improved FSE pulse sequences can enhance imaging quality and diagnostic accuracy.