Magic sandwich echo relaxation mapping of anisotropic systems
Ravinder R Regatte1, Mark E Schweitzer, Alexej Jerschow
1Department of Radiology, Center for Biomedical Imaging, New York University School of Medicine, New York, NY 10016, USA. ravinder.regatte@med.nyu.edu
Magnetic Resonance Imaging
|March 21, 2007
Summary
Magic sandwich echo (MSE) imaging enhances signal-to-noise ratio and relaxation times in anisotropic tissues like bovine Achilles tendon. This advanced MRI technique shows potential for improved imaging of biological structures.
Area of Science:
- Magnetic Resonance Imaging
- Biophysics
- Tissue Characterization
Background:
- Anisotropic tissues exhibit complex magnetic interactions.
- Conventional spin-echo (SE) imaging has limitations in characterizing these interactions.
- Residual dipolar and quadrupolar interactions affect image quality and relaxation measurements.
Purpose of the Study:
- To evaluate Magic Sandwich Echo (MSE) imaging for refocusing interactions in anisotropic tissues.
- To compare MSE imaging with conventional spin-echo (SE) imaging.
- To quantify MSE relaxation and dispersion in bovine Achilles tendon and compare with T(1rho).
Main Methods:
- Application of Magic Sandwich Echo (MSE) imaging.
- Comparison with conventional spin-echo (SE) imaging.
- Quantification of relaxation and dispersion characteristics in bovine Achilles tendon.
Main Results:
- MSE imaging demonstrated a 75-100% higher signal-to-noise ratio compared to T(2)-weighted images.
- MSE relaxation times (13-19 ms) were significantly longer than T(2) relaxation times (4-10 ms).
- MSE provided approximately 100% enhancement in relaxation times compared to T(2).
Conclusions:
- MSE imaging effectively refocuses residual dipolar and quadrupolar interactions in anisotropic systems.
- MSE yields higher signal intensities than conventional SE and T(1rho)-encoded imaging.
- The MSE technique shows promise for advanced MRI of tissues like tendons and cartilage.
Related Concept Videos
01:20Imaging Studies for Cardiovascular System II:Types of Echocardiography
Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
01:17Imaging Studies for Cardiovascular System I:Echocardiography
Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...