Potential Use of Pulse Oximetry for the Diagnosis of Testicular Torsion Scrotal Doppler ultrasonography (scrotal US) has been commonly used for evaluating patients with suspected testicular torsion (TT).1,2However, scrotalUS isnot available in allmedical facilities. Comparatively, pulse oximetry is easily available at all institutions; it is used for monitoring pulse oximeter saturation (SpO2) ...

ferential pericardial effusion with features consistent with tamponade. Color Doppler-flow examination revealed flow within the anterior portion of the pericardial effusion directed toward the right ventricle in systole and toward the right atrium in diastole. No communication with the right atrium or right ventricle was seen [1]. The intrapericardial flow pattern could also be demonstrated by ...

With the growth of genetic engineering, mice have become increasingly common as models of human diseases, and this has stimulated the development of techniques to assess the murine cardiovascular system. Our group has developed nonimaging and dedicated Doppler techniques for measuring blood velocity in the large and small peripheral arteries of anesthetized mice. We translated technology origin...

I investigated the scaling of echolocation call parameters (frequency, duration and repetition rate) in bats in a functional context. Low-duty-cycle bats operate with search phase cycles of usually less than 20 %. They process echoes in the time domain and are therefore intolerant of pulse-echo overlap. High-duty-cycle (>30 %) species use Doppler shift compensation, and they separate pulse and ...

Synthetic impulse and aperture radar (SIAR) is a multi-input multi-output orthogonal multicarrier frequency radar, kind of diverse array (FDA). This has omnidirectional emission in the transmitter each receiver or receiving can form beam. The 4D matched filter this radar’s circular arrays reveal range, elevation angle, azimuth Doppler. existence high sidelobe range-Doppler one significant chall...

Background Ultrasound is the first line modality in evaluation of pelvic masses in female patients. It is helpful in detection of masses and also in determining origin of them. Tissue characterization is possible with gray scale but Doppler study is quite necessary and considers as complimentary method. Most of the time, it should be performed in vaginal US exam. Existence of vascularity and al...

Background Diabetes mellitus type I (DMTI) is one of the most common endocrine and metabolic conditions in childhood. We aimed to assess the tissue Doppler imagining changes in children with DMTI compared to healthy children. Materials and Methods This case-control study was performed on 96 DMTI and 96 healthy children. The d...

The usefulness of two-dimensional color-Doppler flow-imaging (2D Doppler) in the detection, localization, and quantitation of bioprosthetic mitral valve regurgitation is uncertain. Mitral bioprostheses, before and after the creation of transvalvular (n = 33), paravalvular (n = 17), or combined (n = 23) defects, were mounted in a pulsed duplication system (flow rates, 2.5-6.5 1/min; pulse rate, ...

An airborne pulse Doppler radar depends on a combination of range selectivity and velocity selectivity to detect targets in ground cluttsr. In principle clutter sensitivity can be reduced by employing higher bandwidths for greater range resolution. However at a sufficiently high bandwidth the phenomenon of range bin migration occurs which precludes the use of conventional Doppler processing. He...