Mr. Sang's Seven-Figure Logarithms
نویسندگان
چکیده
منابع مشابه
Validation of Noise Figure Measurements by Means of MR Imaging
Introduction In order to maximize the signal-to-noise-ratio (SNR) performance of an MR receiver coil the preamplifier used should add as little noise as possible. The amount of added noise is characterized by its noise figure (NF). Standard NF measurement of a preamplifier requires a tuner to present reference noise at varying complex impedance to the input of the device. Such tuners are not co...
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Circular loops are the most common MR detectors. Loop arrays offer improved signal-to-noise ratios (SNRs) and spatial resolution, and enable parallel imaging. As loop size decreases, loop noise increases relative to sample noise, ultimately dominating the SNR. Here, relative noise contributions from the sample and the coil are quantified by a coil noise figure (NF), NF(coil), which adds to the ...
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BACKGROUND AND PURPOSE Cervicofacial actinomycosis is uncommon, but without proper treatment it causes extensive tissue destruction. Early diagnosis is critical but usually difficult with cultures or imaging. Our aim was to identify characteristic imaging features that facilitated diagnosis in seven patients with cervicofacial actinomycosis. METHODS We retrospectively reviewed the CT and MR f...
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ژورنال
عنوان ژورنال: Journal of the Institute of Actuaries and Assurance Magazine
سال: 1873
ISSN: 2046-1674
DOI: 10.1017/s2046167400044219