Bearing failure is often attributed to be one of the major causes of breakdown in industrial rotating machines that operate at high and low speeds. This paper presents results of a comparative experimental study on the application of the ultrasound technique for condition monitoring of low speed rolling element bearings and conventional vibration measurements with seeded faults on inner-race de...

This work examines the use of a low-power Wireless Acoustic Sensor Network (WASN) for the observation of clinically relevant activities of daily living (ADL) (e.g. eating, personal hygiene, toilet usage, etc.) from elderly. The sensors used in the WASN are both audio and ultrasound receivers. To the best of our knowledge, the combination of audio and ultrasound as a basis for ADL monitoring has...

Previous work indicated that ultrasound echo decorrelation imaging can track and quantify changes in echo signals to predict thermal damage during in vitro radiofrequency ablation (RFA). In the in vivo studies reported here, the feasibility of using echo decorrelation imaging as a treatment monitoring tool was assessed. RFA was performed on normal swine liver (N = 5), and ultrasound ablation us...

Ultrasound Imaging is primary modality in the diagnosis of many diseases. Compared to other imaging techniques ultrasound imaging owes its great popularity to the fact that it is safe and noninvasive procedure for visualizing the heart, vasculature, abdomen, fetal monitoring etc. Ultrasound images are degraded by intrinsic artifacts called speckle which is result of constructive and destructive...

Methods All subjects were stable HIV positive patients receiving HAART. All have been attending a specialist clinic for monitoring HIV-related metabolic complications. Mesenteric, subcutaneous fat and IMT were measured by ultrasound operated by a specialist ultrasonographer. Fasting lipid was measured on the same day of ultrasound measurement. The relationships between variables were analyzed b...

Two cases of uterine perforation are described, occurring 11 days and 4 months, respectively, after the insertion of GyneFix, a frameless intra-uterine contraceptive device (IUD). In both the cases initial ultrasound scan showed the intra-uterine position of the device. Removal of the IUD, either by laparoscopy or laparotomy, had to be carried out. Awareness of this complication, insertion of G...

In this paper we have surveyed the recent developments in the area of in-body ultrasound imaging for cardiovascular interventions. With miniaturized ultrasound sensors integrated at the tip of the instruments (catheters, needles, endoscopes), the local anatomical sites can be imaged with high accuracy. We have covered the applications of TEE (Transesophageal echocardiography), ICE (intracardiac...

Introduction Recent surveys of clinical users of ultrasound conducted in Europe and North America show that users of ultrasound worldwide are poorly informed about the safety issues of diagnostic ultrasound technology. For instance, only 32% of American and European users reported being familiar with the term Thermal Index (TI), and only 18% of Americans and 22% of Europeans could correctly def...

Isolated rat pups respond to cold exposure physiologically by increasing metabolic heat production and behaviorally by emitting ultrasound. The relationship between these 2 responses was investigated by monitoring oxygen consumption, heat production by brown adipose tissue, respiratory rate, and ultrasound production during cold exposure in pups 10-12 days of age. All 3 physiological measures i...

BACKGROUND Traditionally, ultrasound has been used to evaluate musculoskeletal injuries in athletes; however, ultrasound applications extend well beyond musculoskeletal conditions, many of which are pertinent to athletes. EVIDENCE ACQUISITION Articles were identified in PubMed using the search terms ultrasound, echocardiogram, preparticipation physical examination, glycogen, focused assessmen...