In vitrostudy of endogenous CEST agents at 3 T and 7 T
نویسندگان
چکیده
منابع مشابه
AT&T at TREC-7
This year AT&T participated in the ad-hoc task and the Filtering, SDR, and VLC tracks. Most of our eeort for TREC-7 was concentrated on SDR and VLC tracks. On the ltering track, we tested a preliminary version of a text classiication toolkit that we have been developing over the last year. In the ad-hoc task, we introduce a new tf-factor in our term weighting scheme and use a simpliied retrieva...
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Introduction: Recently, the principle feasibility of Electrical Properties Tomography (EPT) has been shown at different field strengths, 1.5 T [1], 3 T [1b], and 7 T [2]. Using the Helmholtz equation to investigate the effect of the local electrical properties on the B1 field (Eq.1 see also [2]) one can obverse that the effect of the local dielectric properties on the B1 field scales with the (...
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OBJECTIVE The aim of this study was to compare quantitative and semiquantitative parameters (signal-to-noise ratio [SNR], contrast-to-noise ratio [CNR], image quality, diagnostic confidence) from a standard brain magnetic resonance imaging examination encompassing common neurological disorders such as demyelinating disease, gliomas, cerebrovascular disease, and epilepsy, with comparable sequenc...
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Previous studies have shown that under some conditions, noise fluctuations in an fMRI time-course are dominated by physiological modulations of the image intensity with secondary contributions from thermal image noise and that these two sources scale differently with signal intensity, susceptibility weighting (TE) and field strength. The SNR of the fMRI time-course was found to be near its asym...
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High field MRI is beneficial for chemical exchange saturation transfer (CEST) in terms of high SNR, CNR, and chemical shift dispersion. These advantages may, however, be counter-balanced by the increased transmit field inhomogeneity normally associated with high field MRI. The relatively high sensitivity of the CEST contrast to B1 inhomogeneity necessitates the development of correction methods...
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ژورنال
عنوان ژورنال: Contrast Media & Molecular Imaging
سال: 2015
ISSN: 1555-4309
DOI: 10.1002/cmmi.1652