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ultrasonic imagine

Tailin Xu, Wei Gao, Li-Ping Xu, Xueji Zhang, Shutao Wang
Inspired by the swimming of natural microorganisms, synthetic micro-/nanomachines, which convert energy into movement, are able to mimic the function of these amazing natural systems and help humanity by completing environmental and biological tasks. While offering autonomous propulsion, conventional micro-/nanomachines usually rely on the decomposition of external chemical fuels (e.g., H2 O2 ), which greatly hinders their applications in biologically relevant media. Recent developments have resulted in various micro-/nanomotors that can be powered by biocompatible fuels...
December 27, 2016: Advanced Materials
Chunlong Fei, Chi Tat Chiu, Xiaoyang Chen, Zeyu Chen, Jianguo Ma, Benpeng Zhu, K Kirk Shung, Qifa Zhou
High resolution ultrasonic imaging requires high frequency wide band ultrasonic transducers, which produce short pulses and highly focused beam. However, currently the frequency of ultrasonic transducers is limited to below 100 MHz, mainly because of the challenge in precise control of fabrication parameters. This paper reports the design, fabrication, and characterization of sensitive broadband lithium niobate (LiNbO3) single element ultrasonic transducers in the range of 100-300 MHz, as well as their applications in high resolution imaging...
2016: Scientific Reports
Shu Tian, Xu-Cheng Yin, Zhi-Bin Wang, Fang Zhou, Hong-Wei Hao
The phacoemulsification surgery is one of the most advanced surgeries to treat cataract. However, the conventional surgeries are always with low automatic level of operation and over reliance on the ability of surgeons. Alternatively, one imaginative scene is to use video processing and pattern recognition technologies to automatically detect the cataract grade and intelligently control the release of the ultrasonic energy while operating. Unlike cataract grading in the diagnosis system with static images, complicated background, unexpected noise, and varied information are always introduced in dynamic videos of the surgery...
2015: Computational and Mathematical Methods in Medicine
R Weller
No abstract text is available yet for this article.
November 2012: Equine Veterinary Journal
Stuart Ibsen, Michael Benchimol, Sadik Esener
Rapid development in the field of ultrasound triggered drug delivery has made it essential to study the real-time interaction between the membranes of live cells and the membranes of echogenic delivery vehicles under exposure to focused ultrasound. The objective of this work was to design an analysis system that combined fluorescent imagining, high speed videography, and definable pulse sequences of focused ultrasound to allow for real time observations of both cell and vehicle membranes. Documenting the behavior of the membranes themselves has not previously been possible due to limitations with existing optical systems used to understand the basic physics of microbubble/ultrasound interaction and the basic interaction between microbubbles and cells...
January 2013: Ultrasonics
Ling Li, Qiang Wei, Hong-Bo Li, Song Wen, Gao-Jun Teng
BACKGROUND: Microbubbles (MBs) can serve as an ultrasound contrast agent, and has the potential for magnetic resonance imaging (MRI). Due to the relatively low effect of MBs on MRI, it is necessary to develop new MBs that are more suitable for MRI. In this study, we evaluate the properties of SonoVue® and custom-made Fe(3)O(4)-nanoparticle-embedded microbubbles (Fe(3)O(4)-MBs) in terms of contrast agents for ultrsonography (US) and MRI. METHODOLOGY/PRINCIPAL FINDINGS: A total of 20 HepG2 subcutaneous-tumor-bearing nude mice were randomly assigned to 2 groups (i...
2012: PloS One
Tsipy Ivry
This article examines a local version of medical public discourse about fetal images produced through ultrasonography in Israel, where this technology has gained huge popularity. Nevertheless, I argue, ultrasound in Israel has not become engaged in the discursive production of "fetal subjects" central to the Euro-American life politics. Fetal images in Israel have become entangled in a "politics of threatened life": where "life" stands typically for the pregnant woman and "threat" for the fetus, while the prospect of a reproductive misfortune is the fabric through which pregnancies, regardless of their medical categorization as "low risk" or "high risk," are navigated and negotiated by doctors and women...
September 2009: Medical Anthropology Quarterly
A Omerbasić
It is impossible, nowadays, to imagine modern medical diagnostic without devices that work on the basis of "Dopplers Effect". Within medicine (in medical diagnostic as well as in medical therapy" "Dopplers Effect" is mainly used indirectly, in other words, using the devices based on "Dopplers Effect", due the the gathering of some useful results, but their physics background or direct usage and understanding of this scientific theory are usually left outside. The physical nature of "Dopplers Effect", biographical facts on J...
1999: Medicinski Arhiv
V Giambanco, L Giambanco, D Alaimo
In pregnancies, the incidence of ectopic pregnancy varies from 1.2% to 1.4%. Diagnostic management of ectopic pregnancy is made by biochemical and ultrasonographic analysis. The evaluation of symptoms and anamnesis improves both comprehension and evaluation of technical data. This review analyzed the risk factors most commonly reported in women with ectopic pregnancy. According to the literature, the improvement of biochemical knowledge has determined the study of many substances: beta hCG, specific glycoproteins beta 1, creatine kinase, renine, progesterone...
January 1999: Minerva Ginecologica
B J Schildger, H Tenhu, M Kramer, M Casares, M Gerwing, B Geyer, A Rübel, E Isenbügel
Ultrasonography in reptiles is a safe, noninvasive repeatable diagnostic imagine method. Size, volume and inner structure of organs can easily be determined. Based on 460 ultrasonographic examinations in 8 species of terrapins, 12 species of snakes and 22 species of lizard normal appearance of heart, gonads, fat bodies, kidneys, bladder and gastrointestinal tract are described. Pathological findings are explained in details using examples.
April 1996: Berliner und Münchener Tierärztliche Wochenschrift
Y Huang, S Gao, Y Huang, S Li
Ninety-six patients with transient ischemia attacks were examined by transcranial Doppler (TCD), carotid color-coded ultrasonic imagine, brain computed tomographic scan (CT), compared with digital subtract angiography (DSA), MRI and MRA were done in some cases. The abnormality of CT and MRI was 30.2% and 74.1%, respectively. The most common findings were lacunar infarction or cerebral atrophy. Sixty-two cases fulfilled the TCD criteria of definitive arterial stenosis (64.5%) and three cases of arteriovenous malformation, among whom 27 patients (43...
August 1995: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
R G Sasser, C A Ruder
Tests for the detection of pregnancy early after insemination have not yet reached their full potential. Currently, the milk progesterone assay provides the earliest possible test, at an interval of one oestrous cycle after insemination, i.e. 17, 21 and 21 days in sheep, goats and cows respectively. This assay is pregnancy non-specific and rate of detection of pregnant animals is acceptable but less than desirable. Detection of activity of early pregnancy factor may develop into an excellent early test for many species, but the rosette inhibition test which is currently required has limited development and use...
1987: Journal of Reproduction and Fertility. Supplement
J S Barthel
The developing areas of video endoscopy, endoscopic ultrasonography, and small-bowel endoscopy are discussed in this article, and new endoscopic approaches to strictures and bleeding lesions of the gastrointestinal tract are presented. The potential applications of these techniques in veterinary medicine are left to the imagination of the reader.
September 1990: Veterinary Clinics of North America. Small Animal Practice
K Stellamor
1. Ultrasound techniques as a new diagnostical method are included in the work and administration of an already existing institution of a central hospital, i.e. the X-ray department. Avoiding a special organizational unit in the hospital or an organization depending on a department which e.g. a gynecology could not be asked to undertake (considering the amount of work and qualification needed) means an advantage from the economic point of view. 2. The radiologist is able to learn the interpretation of the B-Scan of the ultrasound method very quickly because the visual imagination necessary to handle both methods is the same...
November 1976: Röntgen-Blätter; Zeitschrift Für Röntgen-Technik und Medizinisch-wissenschaftliche Photographie
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