نتایج جستجو برای: mri index

تعداد نتایج: 498003  

Journal: :Arquivos de neuro-psiquiatria 1999
M M Vasconcelos C R Guedes R C Domingues R N Vianna M Sotero M M Vieira

The purpose of this study is to describe two infants that were diagnosed with Walker-Warburg syndrome (WWS), a rare form of congenital muscular dystrophy (CMD). They were studied in their clinical, laboratory, and neuroradiologic features. The index case had a brain magnetic resonance imaging (MRI) and the second patient had a head computerized tomography (CT). In addition, a literature review ...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده مهندسی 1392
پریسا ندیرخانلو, سعید فضلی,

رشد نامحدود و غیرقابل کنترل سلول¬ها باعث پیداش تومور در مغز می¬شود. اگر تومورهای مغزی به سرعت شناسایی و بطور مناسب درمان نشوند، می¬توانند باعث آسیب مغزی دائم و یا حتی مرگ بیمار شوند. در سال¬های اخیر تصویربرداری تشدید مغناطیسی (mri) نسبت به سایر روش¬های تصویربرداری پزشکی، برای معاینه و تشخیص کمکی تومورهای مغزی بطور گسترده مورد استفاده قرار گرفته است که علاوه بر داشتن کنتراست بالا برای بافت¬های ن...

2009
C-M. Shih C-Y. Lin C-Y. Chen T-W. Chou S-S. Lin C-H. Chou Y-Y. Shih J-H. Chen C. Chang

Introduction Angiogenesis, the formation and development of new vascular network, is essential to tumor growth. Vascular network surrounding tumor tissues, however, exhibits abnormal functional and structural properties distinct from normal blood vessel. Functional abnormalities include higher permeability and altered blood flow, etc. Tumor vascular permeability can be assessed in vivo by using...

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Journal: :International journal of radiation oncology, biology, physics 2016
Elise M Pogson Geoff P Delaney Verity Ahern Miriam M Boxer Christine Chan Steven David Marion Dimigen Jennifer A Harvey Eng-Siew Koh Karen Lim George Papadatos Mei Ling Yap Vikneswary Batumalai Elizabeth Lazarus Kylie Dundas Jesmin Shafiq Gary Liney Catherine Moran Peter Metcalfe Lois Holloway

PURPOSE To determine whether T2-weighted MRI improves seroma cavity (SC) and whole breast (WB) interobserver conformity for radiation therapy purposes, compared with the gold standard of CT, both in the prone and supine positions. METHODS AND MATERIALS Eleven observers (2 radiologists and 9 radiation oncologists) delineated SC and WB clinical target volumes (CTVs) on T2-weighted MRI and CT su...

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Journal: :Journal of the National Cancer Institute 1998
W F Lawrence W Liang J S Mandelblatt K F Gold M Freedman S M Ascher B J Trock P Chang

BACKGROUND Magnetic resonance imaging (MRI) of the breast has been proposed as a noninvasive diagnostic test for evaluation of suspicious ("index") lesions noted on mammography and/or clinical breast examination (CBE). However, women may have incidental ("serendipitous") lesions detected by MRI that are not found on mammography or CBE. To understand better whether or not biopsy procedures shoul...

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2015
Jan Philipp Radtke Dogu Teber Markus Hohenfellner Boris A. Hadaschik

PURPOSE Accurate detection of clinically significant prostate cancer (PC) and correct risk attribution are essential to individually counsel men with PC. Multiparametric MRI (mpMRI) facilitates correct localization of index lesions within the prostate and MRI-targeted prostate biopsy (TPB) helps to avoid the shortcomings of conventional biopsy such as false-negative results or underdiagnosis of...

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Journal: :Vision Research 2001
L. F Garner G Smith S Yao R. C Augusteyn

The gradient refractive index of the crystalline lens in the Black Oreo Dory (Allocyttus Niger) was determined using two methods; an optimisation program based on finite ray-tracing and the path of laser beams through the lens, and magnetic resonance imaging (MRI) and the linear relationship between refractive index and nuclear transverse relaxation rates. The methods showed good agreement in t...

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2018
K Sasaoka K Nakamura T Osuga T Morita N Yokoyama K Morishita N Sasaki H Ohta M Takiguchi

BACKGROUND Transcranial Doppler ultrasound examination (TCD) is a rapid, noninvasive technique used to evaluate cerebral blood flow and is useful for the detection of intracranial hypertension in humans. However, the clinical usefulness of TCD in diagnosing intracranial hypertension has not been demonstrated for intracranial diseases in dogs. OBJECTIVES To determine the association between th...

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2016
Po-Chun Chu Wen-Yen Chai Chih-Hung Tsai Shih-Tsung Kang Chih-Kuang Yeh Hao-Li Liu

Focused ultrasound (FUS) with microbubbles can temporally open the blood-brain barrier (BBB), and the cavitation activities of microbubbles play a key role in the BBB-opening process. Previous attempts used contrast-enhanced magnetic resonance imaging (CE-MRI) to correlate the mechanical index (MI) with the scale of BBB-opening, but MI only partially gauged acoustic activities, and CE-MRI did n...

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2016
Richard Ho Mohummad M Siddiqui Arvin K George Thomas Frye Amichai Kilchevsky Michele Fascelli Nabeel A Shakir Raju Chelluri Steven F Abboud Annerleim Walton-Diaz Sandeep Sankineni Maria J Merino Baris Turkbey Peter L Choyke Bradford J Wood Peter A Pinto

OBJECTIVES To evaluate the utility of preoperative multiparametric magnetic resonance imaging (MP-MRI) in predicting biochemical recurrence (BCR) following radical prostatectomy (RP). MATERIALS/METHODS From March 2007 to January 2015, 421 consecutive patients with prostate cancer (PCa) underwent preoperative MP-MRI and RP. BCR-free survival rates were estimated using the Kaplan-Meier method. ...

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