نتایج جستجو برای: echo g

تعداد نتایج: 470649  

Journal: :Ultrasound in medicine & biology 2014
Swetha Subramanian Steven M Rudich Amel Alqadah Chandra Priya Karunakaran Marepalli B Rao T Douglas Mast

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...

Journal: :Stroke 2013
Shuo Wang Min Lou Tian Liu Deqi Cui Xiaomei Chen Yi Wang

BACKGROUND AND PURPOSE A novel quantitative susceptibility mapping (QSM) processing technology has been developed to map tissue susceptibility property without blooming artifacts. We hypothesize that hematoma volume measurement on QSM is independent of imaging parameters, eliminating its echo time dependence on gradient echo MRI. METHODS Gradient echo MRI of 16 patients with intracerebral hem...

Journal: :the journal of tehran university heart center 0
ali reza moaref faghihi hospital, shiraz university of medical sciences, shiraz, iran. yadallah mahmoody faghihi hospital, shiraz university of medical sciences, shiraz, iran. khallil zarrabie faghihi hospital, shiraz university of medical sciences, shiraz, iran.

infective endocarditis is a serious complication of intravenous (iv) drug abuse, with a reported mortality of 5 to 10%. a 21-year-old man, who was an intravenous drug abuser, presented with fever and dyspnea. transthoracic echocardiography showed a highly mobile, large vegetation on the anterior leaflet of the tricuspid valve. despite antibiotic therapy for ten days, the patient remained febril...

Journal: :The Journal of experimental biology 2006
Marc W Holderied Otto von Helversen

Echolocating bats emit ultrasonic calls through their mouth or their nostrils and receive echoes from objects with both their ears. Information conveyed in the echoes is the basis for their three-dimensional acoustic perception of the surroundings. The direction of an object is encoded in binaural echo differences, i.e. on the one hand in the different arrival times of its echo at the two ears,...

Journal: :NeuroImage 2012

Journal: :Teksty Drugie 2016

Journal: :Physical Review A 2020

Journal: :Physical Review Letters 2003

Journal: :AJNR. American journal of neuroradiology 1997
E J Escott V M Rao W D Ko J E Guitierrez

PURPOSE To investigate the utility of dynamic contrast-enhanced gradient-echo MR imaging of head and neck lesions and to compare this technique with the commonly used spin-echo contrast-enhanced fat-saturation technique. METHODS Twenty-two patients with a total of 23 head and neck neoplasms underwent dynamic gradient-echo and spin-echo MR imaging studies. The spin-echo and dynamic gradient-ec...

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