نتایج جستجو برای: spectral doppler indices

تعداد نتایج: 286104  

Journal: :acta medica iranica 0
h. mazaher h. sharifian s. sharifkashany g. hanafi

vertebrobasilar insufficiency is the cause of cerebrovascular accidents in 20% of cases. there are few reports regarding spectral doppler indices (sdis) of vertebral arteries (vas) normal blood flow. the objective of this study was to provide basic reference data about sdis of vas normal blood flow separately and in comparison with internal carotid arteries (icas) and common carotid arteries (c...

Journal: :middle east journal of cancer 0
rahul gandhi department of oral medicine and radiology, saraswati-dhanwantari dental college and hospital and post-graduate research institute, parbhani, maharashtra, india abhishek singh nayyar department of oral medicine and radiology, saraswati-dhanwantari dental college and hospital and post-graduate research institute, parbhani, maharashtra, india rahul bhowate department of oral medicine and radiology, sharad pawar dental college and hospital, wardha, maharashtra, india sweta gandhi department of public health dentistry, lata mangeshkar dental college and hospital, nagpur, maharashtra, india girish dongerwar department of oral medicine and radiology, saraswati-dhanwantari dental college and hospital and post-graduate research institute, parbhani, maharashtra, india

background: although color doppler ultrasonography (cdus) is useful in the diagnosis of various diseases of the head and neck, flow signals in oral malignant masses are less studied; hence the present study assesses the usefulness of color doppler ultrasonography in quantifying oral squamous cell carcinoma (oscc) vascularization. in addition, we determine the hemodynamic parameters by spectral ...

2005
Hong Zhang

Most of the important clinical indices of blood flow are estimated from the spectrograms of Doppler ultrasound (US) signals. Any noise may degrade the readability of the spectrogram and the precision of the clinical indices, so the spectral enhancement plays an important role in Doppler US signal processing. A new Doppler US spectral enhancement method is proposed in this paper and implemented ...

Journal: :Journal of biomedical optics 2008
Bin Rao Lingfeng Yu Huihua Kenny Chiang Leandro C Zacharias Ronald M Kurtz Baruch D Kuppermann Zhongping Chen

A functional Fourier domain optical coherence tomography instrument offering spectral Doppler imaging of in vivo pulsatile human retinal blood flow was constructed. An improved phase-resolved algorithm was developed to correct bulk motion artifacts. Spectral Doppler imaging provides complementary temporal flow information to the spatially distributed flow information of the color Doppler image ...

BACKGROUND: Determining the clinical significance of cardiac murmurs is widely considered in equine practice. Pulmonary murmurs are commonly detected in athletic horses. Echocardiography plays a leading role in assessment of these murmurs. OBJECTIVES: Echocardiographic evaluation of horses with pulmonary regurgitation and determining the importance of pulmonary valve murmurs. METHODS: A total n...

Journal: :تحقیقات مهندسی کشاورزی 0
محمدعلی رستمی استادیار بخش تحقیقات فنی و مهندسی کشاورزی مرکز تحقیقات کشاورزی و منابع طبیعی استان کرمان محمدحسین رئوفت استاد گروه مکانیک ماشین های کشاورزی دانشگاه شیراز

satellite imagery was used as a rapid and spatially explicit method to delineate crop residue cover and to estimate the use and intensity of conservation tillage. the potential of multispectral high-spatial resolution of worldview-2 local data was evaluated using 11 satellite spectral indices and linear spectral unmixing analysis (lsua). experimental plots were examined; residue cover was measu...

Journal: :iranian journal of veterinary medicine 2015
abdolrazagh rostami majid masoudifard alireza vajhi mohammad reza mokhber dezfouli ali rezakhani

background: determining the clinical significance of cardiac murmurs is widely considered in equine practice. pulmonary murmurs are commonly detected in athletic horses. echocardiography plays a leading role in assessment of these murmurs. objectives: echocardiographic evaluation of horses with pulmonary regurgitation and determining the importance of pulmonary valve murmurs. methods: a total n...

Objective- This survey was accomplished to describe the hepatic artery and portal vein indices in healthy domestic cats by color Doppler ultrasonography technique. Design- Retrospective experimental study. Animals- Twenty domestic short hair (DSH) cats (10 males and 10 females). Procedures- Doppler indices of ...

Journal: :Journal of obstetrics and gynaecology of India 2013
Dharita Shah Sandip Shah Jay Parikh C J Bhatt Kavita Vaishnav D V Bala

AIMS The aim of the present study was to prove the efficiency of Color Doppler and Spectral Doppler in evaluation and characterization of the ovarian neoplasm. MATERIALS AND METHODS In total, 104 patients with adnexal masses were examined sonographically to evaluate for morphologic characteristics, as well as pulsatility indices (PI), and resistance indices (RI) over a period of 2 years, of w...

Journal: :Journal of biomedical optics 2010
Lingfeng Yu Elaine Nguyen Gangjun Liu Bernard Choi Zhongping Chen

We report the use of spectral Doppler optical coherence tomography imaging (SDOCTI) for quantitative evaluation of dynamic blood circulation before and after a localized ischemic stroke in a mouse model. Rose Bengal photodynamic therapy (PDT) is used as a noninvasive means for inducing localized ischemia in cortical microvasculature of the mouse. Fast, repeated Doppler optical coherence tomogra...

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