Evaluation of internal MRI coils using ultimate intrinsic SNR
نویسندگان
چکیده
منابع مشابه
Evaluation of internal MRI coils using ultimate intrinsic SNR.
The upper bounds of the signal-to-noise ratio (also known as the "ultimate intrinsic signal-to-noise ratio" (UISNR)) for internal and external coils were calculated. In the calculation, the body was modeled as a dielectric cylinder with a small coaxial cylindrical cavity in which internal coils could be placed. The calculated UISNR values can be used as reference solutions to evaluate the perfo...
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Introduction Internal coils are widely used in MRI applications for both diagnostic and interventional studies [1]. Their high SNR characteristics make them more preferable in certain applications when compared to conventil external coils. Although many studies exist for the optimization of external coils to obtain increased SNR, an optimization study for internal MRI coils can also be made. In...
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Introduction: Myocardial strain assessment based on Displacement ENcoding with Stimulated Echoes (DENSE) MRI is a powerful tool to study myocardial function. Unfortunately, low SNR caused by T1 relaxation and excitation puts a limit on the number of cardiac phases that can be resolved. Several techniques to improve the SNR have been previously presented, with associated trade-offs. The regional...
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A method to calculate the ultimate intrinsic signal-to-noise ratio (SNR) in a magnetic resonance experiment for a point inside an arbitrarily shaped object is presented. The ultimate intrinsic SNR is determined by body noise. A solution is obtained by optimizing the electromagnetic field to minimize total power deposition while maintaining a constant right-hand circularly polarized component of...
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The ultimate intrinsic signal-to-noise ratio is the highest possible signal-to-noise ratio, and the ultimate intrinsic specific absorption rate provides the lowest limit of the specific absorption rate for a given flip angle distribution. Analytic expressions for ultimate intrinsic signal-to-noise ratio and ultimate intrinsic specific absorption rate are obtained for arbitrary sample geometries...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2004
ISSN: 0740-3194
DOI: 10.1002/mrm.20200