The paper focuses on the distortions introduced by low frequency magnetic field meters in the measurement of pulsed or periodic quasi-rectangular waveforms, such as those experienced near welding devices or Magnetic Resonance Imaging (MRI) machines. Starting from the meter frequency response, evaluated by generating reference sinusoidal magnetic fields up to a hundred of hertz, a circuital mode...

The number of complications between guidewires and inferior vena cava filters is unknown and most likely underreported. Since 1993, at least 17 cases of central venous catheter guidewires entangled in inferior vena cava filters have been reported. The placement of both devices in the intensive care setting has increased the number of incidents in which a guidewire from a central venous catheter...

introduction: the accuracy of analyzing functional mri (fmri) data is usually decreases in the presence of noise and artifact sources. a common solution in for analyzing fmri data having high noise is to use suitable preprocessing methods with the aim of data denoising. some effects of preprocessing methods on the parametric methods such as general linear model (glm) have previously been evalua...

here, we propose an add-drop and a channel drop filter based on two-dimensional photonic crystal all circular ring resonators. these structures are made of a square lattice of silicon rods with the refractive index n1=3.464 surrounded by air (with refractive index n2=1). the broadest photonic band gap occurs at the filling ratio of r/a = 0.17. two linear defect w1 waveguides couple to the ring....

OBJECTIVES For treatment and prevention of deep vein thrombosis(DVT) and pulmonary embolism(PE), retrievable inferior vena cava(IVC) filters have commonly been used as an effective bridge to anticoagulation. However, we experienced unexpected difficulty in endovascular retrieval of some IVC filters. Most problems were due to endovascular treatment devices issues, filter intimal migration, filte...

acute fulminant myocarditis is a life-threatening inflammatory disease of the myocardium characterized by the rapid deterioration of the hemodynamic status of the affected individual. with prompt recognition and appropriate management, complete recovery of ventricular function is likely within a few weeks. we introduce a 28-year-old man with acute fulminant myocarditis, who experienced circulat...

Finite impulse response (FIR) filtering is a ubiquitous operation in digital signal processing systems and is generally implemented in full custom circuits due to high-speed and low-power design requirements. The complexity of an FIR filter is dominated by the multiplication of a large number of filter coefficients by the filter input or its time-shifted versions. Over the years, many high-leve...

background : iud is one of the safest and most widely used reversible methods of contraception. the purpose of this study was to determine iud survival and reasons for early discontinuation in bandar abbas, south of iran. methods: probability of iud continuation rate and factors associated with discontinuation were assessed in a historical cohort study of 400 women records from march 2002 to fe...

OBJECTIVES The aim of this study was to evaluate the feasibility and safety of carotid artery stenting (CAS) with a filter protection system. BACKGROUND Neurologic events linked to the embolization of particulate matter to the cerebral circulation may complicate CAS. Strategies designed to capture embolic particles during carotid intervention are being evaluated for their efficacy in reducing...