نتایج جستجو برای: ultrasound imaging

تعداد نتایج: 544100  

2015
Richard Amini Ashish R. Panchal David Bahner Srikar Adhikari

This report describes a patient with sub-massive pulmonary embolism (PE) who was successfully treated with half-dose thrombolytics guided by the use of point-of-care (POC) ultrasound. In this case, POC ultrasound was the only possible imaging since computed tomography was contraindicated. POC ultrasound demonstrated a deep vein thrombosis and evidence of cardiac strain. In situations or locatio...

Journal: :IEICE Transactions 2012
Kenshi Saho Tomoki Kimura Shouhei Kidera Hirofumi Taki Takuya Sakamoto Toru Sato

Many researchers have proposed ultrasound imaging techniques for product inspection; however, most of these techniques are aimed at detecting the existence of flaws in products. The acquisition of an accurate three-dimensional image using ultrasound has the potential to be a useful product inspection tool. In this paper we apply the Envelope algorithm, which was originally proposed for accurate...

2016
Nathalie J. Bureau Daniela Ziegler

PURPOSE OF REVIEW Healthcare costs have exploded in the past 30 years and they are a major concern for governments worldwide. Care management of musculoskeletal disorders and advanced imaging account for a large part of this socioeconomic burden. RECENT FINDINGS Musculoskeletal ultrasound is now performed primarily by nonradiologists. Both musculoskeletal ultrasound and MRI total utilization ...

Journal: :Circulation 1990
S E Nissen C L Grines J C Gurley K Sublett D Haynie C Diaz D C Booth A N DeMaria

Tomographic imaging techniques such as ultrasound can provide important information in the evaluation of vascular anatomy. Recent technical advances have permitted fabrication of a small (1.83 mm), phased-array, intravascular ultrasonic imaging catheter capable of continuous real-time, cross-sectional imaging of blood vessels. We used this imaging catheter to compare intraluminal ultrasound wit...

Journal: :Cancer research 2005
Lauren A Wirtzfeld Guojun Wu Michael Bygrave Yasuto Yamasaki Hideki Sakai Madeleine Moussa Jonathan I Izawa Dónal B Downey Norman M Greenberg Aaron Fenster Jim W Xuan James C Lacefield

Prostate cancer is the most common cancer in adult men in North America. Preclinical studies of prostate cancer employ genetically engineered mouse models, because prostate cancer does not occur naturally in rodents. Widespread application of these models has been limited because autopsy was the only reliable method to evaluate treatment efficacy in longitudinal studies. This article reports th...

Journal: :Optics letters 2007
Xiao Xu Huiliang Zhang Philip Hemmer De-kui Qing Chulhong Kim Lihong V Wang

Ultrasound-modulated optical tomography is a developing hybrid imaging modality that combines high optical contrast and good ultrasonic resolution for imaging soft biological tissue. We developed a photorefractive-crystal-based, time-resolved detection scheme with the use of a millisecond long ultrasound burst to image both the optical and the mechanical properties of biological tissues, with i...

Journal: :The bone & joint journal 2016
G S Matharu R Mansour O Dada S Ostlere H G Pandit D W Murray

AIMS The aims of this study were to compare the diagnostic test characteristics of ultrasound alone, metal artefact reduction sequence MRI (MARS-MRI) alone, and ultrasound combined with MARS-MRI for identifying intra-operative pseudotumours in metal-on-metal hip resurfacing (MoMHR) patients undergoing revision surgery. METHODS This retrospective diagnostic accuracy study involved 39 patients ...

2015
Yiming Fang Zhixiong Lu Lujun Lin Hailin Feng Junjie Chang

Air-coupled ultrasound has shown excellent sensitivity and specificity for the nondestructive imaging of wood-based material. However, it is timeconsuming, due to the high scanning density limited by the Nyquist law. This study investigated the feasibility of applying compressed sensing techniques to air-coupled ultrasound imaging, aiming to reduce the number of scanning lines and then accelera...

2013
Sunitha V. Bachawal Kristin C. Jensen Amelie M. Lutz Sanjiv S. Gambhir Francois Tranquart urgen K. Willmann

While there is an increasing role of ultrasound for breast cancer screening in patients with dense breast, conventional anatomical ultrasound lacks sensitivity and specificity for early breast cancer detection. In this study, we assessed the potential of ultrasound molecular imaging using clinically translatable vascular endothelial growth factor receptor type 2 (VEGFR2)-targeted microbubbles (...

Journal: :Entropy 2018
Jui Fang Ning-Fang Chang Po-Hsiang Tsui

Ultrasound B-mode imaging based on log-compressed envelope data has been widely applied to examine hepatic steatosis. Modeling raw backscattered signals returned from the liver parenchyma by using statistical distributions can provide additional information to assist in hepatic steatosis diagnosis. Since raw data are not always available in modern ultrasound systems, information entropy, which ...

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