A high-resolution rapid-scan antenna

بررسی حساسیت، ویژگی و صحت تشخیصی High Resolution CT Scan در آسیب‌های منیسک

زمینه و هدف: مفصل زانو به‌عنوان بزرگترین مفصل سینوویال بدن شامل رباط‌های جانبی، رباط‌های متقاطع و منیسک داخلی و خارجی می‌باشد. برای مدیریت مناسب، شناسایی آسیب به هریک از ساختارهای زانو ضروری است. در این مطالعه حساسیت، ویژگی و صحت تشخیصی High Resolution CT Scan در آسیب‌های منیسک بررسی گردید. روش بررسی: در این مطالعه ارزیابی صحت آزمون، 57 بیمار با شرح حال مثبت ضایعه منیسک مراجعه‌کننده به بیمارستا...

High-resolution Direction Finding Using a Switched Parasitic Antenna

Direction finding by exploiting the directional radiation patterns of an Switched Parasitic Antenna (SPA) is considered. By employing passive elements (parasites), which can be shorted to ground using pin diodes, directional radiation patterns can be obtained. The direction finding performance of the SPA is examined by calculating a lower bound on the direction finding accuracy, the Cramér-Rao ...

A Compact Modified Bow-Tie Antenna for High- Resolution GPR

High-Resolution Underwater Mapping Using Side-Scan Sonar.

The goal of this study is to generate high-resolution sea floor maps using a Side-Scan Sonar(SSS). This is achieved by explicitly taking into account the SSS operation as follows. First, the raw sensor data is corrected by means of a physics-based SSS model. Second, the data is projected to the sea-floor. The errors involved in this projection are thoroughfully analysed. Third, a probabilistic ...

Single-scan longitudinal relaxation measurements in high-resolution NMR spectroscopy.

Several single-scan experiments for the measurement of the longitudinal relaxation time (T1) are proposed. These experiments result in fast and accurate determinations of the relaxation rate, are relatively robust to pulse imperfections, and preserve information about the chemical shift. The method used in these experiments is to first encode the T1 values as a spatial variation of the magnetiz...