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Magnetic resonance imaging with ultrashort TE (UTE) PULSE sequences: technical considerations
Damian J Tyler1, Matthew D Robson, R Mark Henkelman
1Oxford University Centre for Clinical Magnetic Resonance Research, MRS Unit, John Radcliffe Hospital, Oxford, United Kingdom.
Journal of Magnetic Resonance Imaging : JMRI
|January 30, 2007
Summary
Ultrashort echo time (UTE) pulse sequences enable detection of signals from tissues with very short T2 relaxation times, like cortical bone. This review covers UTE sequence principles, system requirements, and clinical applications.
Area of Science:
- Magnetic Resonance Imaging (MRI)
- Biophysics
Background:
- Conventional MRI struggles with tissues exhibiting short T2 relaxation times.
- Ultrashort echo time (UTE) pulse sequences overcome limitations in detecting signals from tissues like cortical bone.
Purpose of the Study:
- To review the principles and applications of UTE pulse sequences for imaging short T2 tissues.
- To discuss MR system requirements crucial for implementing UTE sequences.
Main Methods:
- Review of existing literature on UTE pulse sequences.
- Analysis of MR system design considerations (gradient performance, RF switching, data processing).
- Categorization of tissues based on T2 relaxation time components.
Main Results:
- UTE sequences allow detection of signals from tissues with short T2 components, previously undetectable.
- Tissue properties influencing UTE signal acquisition are discussed.
- Clinical applications of UTE imaging are illustrated.
Conclusions:
- UTE pulse sequences are essential for imaging tissues with short T2 relaxation times.
- Specific MR system design features are critical for successful UTE sequence implementation.
- UTE MRI offers expanded diagnostic capabilities for various tissues.
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Computed Tomography (CT) scan:
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