نتایج جستجو برای: magnetic resonance imaging denoising

تعداد نتایج: 745036  

Journal: :iranian biomedical journal 0
داریوش شهبازی گهرویی daryoush shahbazi-gahrouei مریم روفه mariam roufeh محمد باقر توکلی mohammad bagher tavakoli

background: the monoclonal antibody, c595, against breast cancer cell line was conjugated with cyclic anhydride gadolinium-diethylenetriaminepenta-acetic acid (gd-cdtpaa) to produce gd-dtpa-c595 and used as specific breast cancer cell line (mcf-7) contrast agents in magnetic resonance imaging (mri).  methods: after incubation of breast cancer cell line (mcf-7), with different contrast agents (g...

Journal: :international journal of environmental research 2012
t.h. kim j.k. song g.w. jeong

the purpose of this study was to investigate the brain activation patterns in response to thehuman color preference by using a functional magnetic resonance imaging (fmri). a total of 31 healthyhumans without color blindness were participated in this study. the brain activation was induced by viewingof eight different colors: black, gray, blue, green, earthy yellow, red, yellow and white. the q...

Journal: :iranian journal of radiation research 0
gh. haeri ent of medical physics, faculty of medical sciences, tarbiat modares university, tehran, iran h. rajabi department of medical physics, faculty of medical sciences, tarbiat modares university, tehran, iran sh. akhlaghpoor department of radiology, sina hospital, tehran university of medical science, tehran, iran

background: finding a suitable method for rapid, accurate and reliable estimation of absorbed dose has high priority in management of the radiation exposed persons. shortly after radiation exposure, apoptosis is a major detriment in proliferative tissues such as the hematopoietic system. therefore, quantification of apoptosis in these tissues could be useful for rapid estimation of radiation ex...

Journal: :international journal of occupational and environment medicine 0
s yilmaz department of oral and maxillofacial radiology, faculty of dentistry, kirikkale university, kirikkale, turkey

[no abstract available]

Farkhonde Salehi, Farzad Moradi, Saleh Salehi Zahabi, Shahriar Asgari,

In recent years, the development of neuroimaging techniques such as high-resolution magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), positron emission tomography (PET), or single photon emission tomography (SPECT) has promoted the identification of structural and functional characteristics underlying mental disorders to a great extent. In anxiety disorders, recent...

2005
Aleksandra Pižurica Alle Meije Wink Ewout Vansteenkiste

There is a growing interest in using multiresolution noise filters in a variety of medical imaging applications. We review recent wavelet denoising techniques for medical ultrasound and for magnetic resonance images and discuss some of their potential applications in the clinical investigations of the brain. Our goal is to present and evaluate noise suppression methods based on both image proce...

Journal: :Signal, Image and Video Processing 2017
S. Faegheh Yeganli Hasan Demirel Runyi Yu

Despite the success of magnetic resonance imaging techniques in many applications, acquisition noise is still a limiting factor for the quality and hence the usefulness of the techniques. In this paper, a new algorithm for denoising magnetic resonance images based on higher order singular value decomposition is proposed. The proposed algorithm first forms a single tensor from the noisy data. Ne...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی برق 1387

روش تصویربرداری functional mri روشی غیر تهاجمی برای بررسی عملکرد تابعی مغز است. به بیان واضح تر برای بررس‍ی اینکه برای هر دسته از اعمال بدن انسان کدام قسمت از مغز فعال است، ازاین نوع تصویربرداری استفاده می شود. همانطور که واضح است در یک لحظه مشخص بیش از یک قسمت از مغز انسان فعال است. لذا برای شناسایی عملکرد بخش خاصی از مغز نیاز داریم تا با یک روش خاص مراکز مختلف فعالیت در مغز را از یکدیگر متمای...

2016
Jing Peng Jiliu Zhou Xi Wu

Denoising is a crucial preprocessing procedure for three dimensional magnetic resonance imaging (3D MRI). Existing denoising methods are predominantly implemented in a single domain, ignoring information in other domains. However, denoising methods are becoming increasingly complex, making analysis and implementation challenging. The present study aimed to develop a dual-domain image denoising ...

Journal: :Annual review of biomedical engineering 2000
A F Laine

We review some of the most recent advances in the area of wavelet applications in medical imaging. We first review key concepts in the processing of medical images with wavelet transforms and multiscale analysis, including time-frequency tiling, overcomplete representations, higher dimensional bases, symmetry, boundary effects, translational invariance, orientation selectivity, and best-basis s...

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