BACKGROUND High-frequency B scan ultrasonography is a proven method for the assessment of anterior segment diseases. Only few studies have used sonography to examine the lacrimal drainage system. We examined the proximal lacrimal drainage system by high-resolution 20-MHz ultrasound to verify the possibility to identify intracanalicular lacrimal plugs. METHODS Eight patients who had received 1...

A method ofmeasuring femoral neck anteversion using a static B scanner has been described (Moulton and Upadhyay 1982). This study used dried femora in a waterbath and the results obtained were confirmed by direct measurement. Although the experimental scans were performed under direct vision it was assumed that the method would be accurate in vivo where similar images can only be obtained using...

Although new ultrasound signal processing can be designed from simulation data or recorded data, the development and prototyping of new medical ultrasound imaging tools is essentially based on processing the radio frequency (RF) data, which is the signal generated by the ultrasound probe. Unfortunately, the diversity and technological level of knowledge required for implementing a whole ultraso...

AIM To demonstrate feasibility of vessel wall imaging of the superficial palmar arch using high frequency micro-ultrasound, 7T and 3T magnetic resonance imaging (MRI). METHODS Four subjects (ages 22-50 years) were scanned on a micro-ultrasound system with a 45-MHz transducer (Vevo 2100, VisualSonics). Subjects' hands were then imaged on a 3T clinical MR scanner (Siemens Biograph MMR) using an...

Image processing plays a vital role in the development of medical industry especially ultrasound medical images. Image acquisition is carried out using ultrasound equipments like transducer, scanner, and CPU and display device. There are mainly four modes of ultrasound imaging A-mode, M-mode, B-mode and Doppler-mode. Ultrasound imaging plays crucial role in medical imaging due to its non-invasi...

Conclusion. Manual mode ultrasound procedure is more accurate in detection of focal liver parenchymal lesions because of reduced specificity in auto mode compared with higher specificity and small percentage of false positive results within manually adjusted scanner. We show the great value of best performance manual setting of the scanner in liver parenchymal focal lesions detecting. OPEN ACCE...

n the late 1970s when I was a radiology resident, there was an ultrasound machine in the emergency radiology suite but no computed tomographic (CT) scanner. There was only 1 CT scanner in our hospital (Massachusetts General Hospital, 1977–1980), and all of the CT scans ordered by the emergency room were for head trauma. Nowadays, not only is there a CT scanner in the emergency room, but it is w...

Background: Fibroblast cell lines have different application in biological research including nuclear transfer in cloning, feeder layer of embryonic stem cells, wound healing research and tissue engineering. The objective of the present study was to determine the proper pregnancy age for collecting and culturing guinea pig fetal fibroblast. Materials and Methods: Guinea pig fetuses were collect...