background: to determine whether islamic fasting would change cerebral blood flow during ramadan. methods: the study group comprised 20 subjects (16 males and 4 females) on a regimen of 1 month food and water intake restriction, according to islamic fasting ritual. subjects were evaluated for cerebral bolo flow through a middle cerebral artery (mca) by means of transcranial doppler (tcd), the d...

conclusions the aspirates from the hypovascular and hypervascular sites of solid nodules are complementary and should be performed consecutively. results when only hypervascular site was used, adequate sampling was limited to 65% of the cases. when both sites were evaluated together, overall adequate sampling was 91%. adding a sample from the hypervascular site to hypovascular aspirate increase...

background endothelial injury is a well-known complication in chronic kidney disease (ckd) and hemodialysis. one of the sites in which early vascular changes may be detected is the retina. of course, these flow changes may not be detected in ophthalmologic exams, but it seems that color doppler sonography of retinal arteries may be helpful in these cases. objectives in previous studies on ckd p...

OBJECTIVE To establish reference range for uterine artery (UtA) Doppler pulsatility index (PI) using transvaginal ultrasound at 20-24w6d of gestation in a Brazilian population. MATERIAL AND METHODS A retrospective cross-sectional study in 847 low-risk pregnant women undergoing routine second trimester ultrasound examination was conducted from February 2012 through March 2015. The mean UtA PI ...

Combined two-dimensional and Doppler echocardiography has a high sensitivity and specificity for detection of isolated perimembranous ventricular septal defects. However, muscular or multiple ventricular septal defects may be difficult to diagnose with noninvasive methods, particularly in older children, necessitating angiography for accurate diagnosis. Detection of single and multiple ventricu...

In this contribution, the Doppler spectral properties are simulated and analyzed based on 3GPP Spatial Channel Model extension (SCME). SCME standard channel model is applied to the system evaluation and optimization in LTE and other future communication networks. Since future mobile communication systems demand for high moving speed, the simulation and analysis of Doppler characteristics become...

Objective- To create three-dimensional model of the dog's liver vessels by using threedimensionalcolor Doppler ultrasonography which can be used for surgery planning,tumor detecting, transplantation, and other diagnostic or treatment project.Design- Descriptive studyAnimals- 6 mixed breed dog, 1.6-1.7 years old, 18-20 kg weightProcedures- The liver was found by two-dimensional scan initially th...