نتایج جستجو برای: dwi

تعداد نتایج: 3434  

Journal: :Journal of computer assisted tomography 2005
Fang-Ying Chiu Jo-Chi Jao Chiao-Yun Chen Gin-Chung Liu Twei-Shiun Jaw Yen-Yu Chiou Feng-O Hsu Jui-Sheng Hsu

OBJECTIVE Diffusion-weighted imaging (DWI) is usually performed before administration of intravenous contrast agents. Repetition of DWI is occasionally necessary after contrast administration, but the effects of contrast material on DWI and apparent diffusion coefficient (ADC) values in the abdomen have not yet been fully examined. The purpose of this work is to assess whether administration of...

2017
Mo Liu Zhihong Wang Hongwei Zhou Minhang Zhou Yongjian Gu Yibing Yao Junzhong Sun

Objective: In view of the characteristics of Whole-Body Diffusion-Weighted MRI (WB-DWI) and the difficulties in the diagnosis of bone metastases from lung cancer, our study aimed to explore the possible application of WB-DWI in diagnosis of bone metastases from lung cancer. Methods: 70 patients with lung cancer were selected in our hospital from August 2012 to June 2014. All the patients were s...

2015
Marius E. Mayerhoefer Georgios Karanikas Kurt Kletter Helmut Prosch Barbara Kiesewetter Cathrin Skrabs Ulrich Jaeger Ingrid Simonitsch-Klupp Philipp Ubl Markus Raderer

Purpose: To determine the value of diffusion-weighted MRI (DWI-MRI) for treatment response assessment in 2-[18F]fluoro2-deoxy-D-glucose (FDG)–avid lymphoma. Experimental Design: Patients with FDG-avid Hodgkin (HL) or non-Hodgkin lymphoma (NHL) at pretherapeutic 18F-FDGPET/CT, who had also undergone pretherapeutic whole-body DWI-MRI, were included in this prospective study. Depending on the hist...

Journal: :Stroke 2013
Sarah Mah Gabrielle deVeber Xing-Chang Wei Natalia Liapounova Adam Kirton

BACKGROUND AND PURPOSE Crossed cerebellar atrophy is uncommon in childhood arterial ischemic stroke. Acute corticospinal tract diffusion-weighted imaging (CST-DWI) changes occur in stroke of all ages. Contralateral CST-DWI is unexplained but approximates corticopontocerebellar pathways. We hypothesized that cerebellar atrophy can be quantified on clinical neuroimaging in childhood arterial isch...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2003
U G R Schulz D Briley T Meagher A Molyneux P M Rothwell

OBJECTIVES Diffusion weighted brain imaging (DWI) is used in acute stroke, and also shows an acute ischaemic lesion in most transient ischamic attack (TIA) patients scanned acutely. However, it may also be useful in identifying subacute ischaemic lesions in patients with minor stroke or TIA who present several weeks after symptom onset. This study investigated the sensitivity and the observer r...

Journal: :Stroke 2001
O Wu W J Koroshetz L Ostergaard F S Buonanno W A Copen R G Gonzalez G Rordorf B R Rosen L H Schwamm R M Weisskoff A G Sorensen

BACKGROUND AND PURPOSE Tissue signatures from acute MR imaging of the brain may be able to categorize physiological status and thereby assist clinical decision making. We designed and analyzed statistical algorithms to evaluate the risk of infarction for each voxel of tissue using acute human functional MRI. METHODS Diffusion-weighted MR images (DWI) and perfusion-weighted MR images (PWI) fro...

2012
Elhousseiny I. Ibrahiem Tarek Mohsen Adel M. Nabeeh Yasser Osman Ihab A. Hekal Mohamed Abou El-Ghar

AIM To evaluate diffusion weighted image-MRI (DWI) as a single diagnostic noninvasive MRI technique for prostate cancer (PCa) diagnosis. MATERIAL AND METHODS A prospective study was conducted between July 2008 and July 2009. Candidates patients were equal or more than 40 years old, with suspicious digital rectal examination (more than clinical T2) or PSA >4 ng/mL. Informed consent was signed....

Journal: :Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism 2010
Mark W Parsons Soren Christensen Patrick McElduff Christopher R Levi Ken S Butcher Deidre A De Silva Martin Ebinger P Alan Barber Christopher Bladin Geoffrey A Donnan Stephen M Davis

We hypothesized that pretreatment magnetic resonance imaging (MRI) diffusion-weighted imaging (DWI) and perfusion-weighted imaging (PWI) lesion volumes may have influenced clinical response to thrombolysis in the Echoplanar Imaging Thrombolytic Evaluation Trial (EPITHET). In 98 patients randomized to intravenous (IV) tissue plasminogen activator (tPA) or placebo 3 to 6 h after stroke onset, we ...

Journal: :AJNR. American journal of neuroradiology 2009
P Lehmann G Saliou C Brochart C Page B Deschepper J N Vallée H Deramond

BACKGROUND AND PURPOSE MR diagnostic of postoperative recurrent cholesteatomas is difficult. Our purpose was to compare multishot fast spin-echo periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) diffusion-weighted MR imaging (DWI) with array spatial sensitivity encoding technique (ASSET) single-shot echo-planar DWI and late postgadolinium T1-weighted MR im...

2009
R. Bammer K. W. Yeom S. J. Holdsworth S. T. Skare

Introduction: Diffusion-weighted MRI (DWI) has demonstrated great value for the diagnostic workup of acute ischemic stroke and other abnormalities of the neurocranium, such as abscesses, CJD, etc. Similar diagnostic benefits could be anticipated from using DWI on orbital pathologies. High on the list of interesting pathologies are certainly periorbital dermoids/epidermois, fungal and pyogenic i...

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