نتایج جستجو برای: a laser imaging system was assembled for capturing backscattering images

تعداد نتایج: 16551663  

2012
Ramona Cernat Taran S. Tatla Jingyin Pang Paul J. Tadrous Adrian Bradu George Dobre Grigory Gelikonov Valentin Gelikonov Adrian Gh. Podoleanu

A dual instrument is assembled to investigate the usefulness of optical coherence tomography (OCT) imaging in an ear, nose and throat (ENT) department. Instrument 1 is dedicated to in vivo laryngeal investigation, based on an endoscope probe head assembled by compounding a miniature transversal flying spot scanning probe with a commercial fiber bundle endoscope. This dual probe head is used to ...

1998
José M. B. Dias Tiago A. M. Silva José M. N. Leitão

The paper proposes a restoration method for speckled images generated by coherent imaging systems (e.g., synthetic aperture radar, synthetic aperture sonar, ultrasound imaging, and laser imaging). These systems are invariably affected by speckle noise and therefore restoration/filtering of the mean backsattered signal (backsacttering coefficient) is often necessary. The approach is Bayesian: th...

  Background: This study has aimed to measure the patient dose in entire spine radiography by EOS system in comparison with the digital radiography. Methods: EOS stereo-radiography was used for frontal and lateral view spine imaging in 41 patients in a prospective analytical study. A calibrated dose area product (DAP) meter was used for calibration of the DAP in EOS system. The accuracy and pr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1391

we have two part in this thesis, at first: the interaction of native calf thymus dna (ct-dna) with two anthraquinones including quinizarin (1,4- dihydroxy anthraquinone) and danthron (1,8- dihydroxy anthraquinone) in a mixture of 0.04 m brittone-robinson buffer and 50% of ethanol were studied at physiological ph by uv-vis absorption, florescence, circular dichroism spectroscopic methods, viscos...

Journal: :iranian journal of radiation research 0
s. farzanefar department of nuclear medicine , vali-asr hospital, tehran university of medical sciences, tehran, iran a. mirzabeigi research institute for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran m. abbasi department of nuclear medicine , vali-asr hospital, tehran university of medical sciences, tehran, iran

a discrete mibi avid lung lesion was found in cinematic views of myocardial perfusion imaging (mpi) of a 59 year-old woman. interestingly, the abnormal uptake in the lung was detectable only in the rest phase images and not in the images acquired in the stress phase. mpi was performed for pre-operation cardiac risk assessment before correction surgery for spinal canal stenosis.  she had no past...

Journal: :Cardiology journal 2017
Juan Luis Gutiérrez-Chico Milosz Jaguszewski Miguel Comesaña-Hermo Miguel Ángel Correa-Duarte Luis Mariñas-Pardo Manuel Hermida-Prieto

BACKGROUND The ability of optical coherence tomography (OCT) to visualise macrophages in vivo in coronary arteries is still controversial. We hypothesise that imaging of macrophages in OCT could be enhanced by means of superparamagnetic nanoparticles. METHODS We compared the optical backscattering and attenuation of cell pellets containing RAW 264.7 macrophages with those of macrophagic cell ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1390

in one pole of the continuum of language learning, theoreticians and practitioners traditionally consider english as english as a second language or english as a foreign language. however, in the other pole of this continuum where english is thought of as the most effective tool for international communication, it is referred to as a lingua franca. those who favor an approach to english growing...

Weerakaset Suanpaga

The purpose of this study is to build the binary logit model of an airport pavement that could monitor the pavement condition in near real time using microwave remote sensing satellite, then the relationship between the international roughness index (IRI) of an airport and backscattering values from PALSAR images of the ALOS satellite was determined. Total 390 data were used in analysis. This m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید مدنی آذربایجان - دانشکده ادبیات و علوم انسانی 1392

ii abstract the legend of human being’s refulgence was distorted completely in the age of modernity. this new age, had some drastic negative effects, besides its positive qualities. one significant negative effect of it was the emergence of neurosis in human beings. aldous huxley’s brave new world was one of the novels of the 02 th century that contained the prophecy of criticizing ...

Abbas Shirdel Hosnoddin Nabiev Kamran Aryana Mehdi Momennezhad, Mohammad Mahdi Koushyar Ramin Sadeghi, Seyed Rasoul Zakavi, Toktam Mohammadi Rana Vahid Reza Dabbagh kakhki

Introduction: Despite widespread use of 67Gallium for lymphoma evaluation, timing of imaging after injection is a matter of controversy and to the extent of our knowledge no direct comparison has been made between early and delayed gallium images. We aimed to compare 24 and 48 hours post injection planar gallium imaging for evaluation of lymphoma recurrence. Methods: 255 pa...

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