نتایج جستجو برای: dwi

تعداد نتایج: 3434  

Journal: :Stroke 2004
Kerstin Winbeck Kathrin Bruckmaier Thorleif Etgen Helga Gräfin von Einsiedel M Röttinger Dirk Sander

BACKGROUND Diffusion-weighted imaging (DWI) has been established to diagnose acute cerebral ischemia. Signal intensity changes occur not only in patients with definite stroke but also in up to 67% of transient ischemic attack (TIA) patients. We investigated the predictive value of DWI signal intensity changes to distinguish between TIA and stroke. METHODS Clinical data, conventional magnetic ...

Journal: :Lecture Notes in Computer Science 2021

VERDICT maps have shown promising results in clinical settings discriminating normal from malignant tissue and identifying specific Gleason grades non-invasively. However, the quantitative estimation of requires a diffusion-weighed imaging (DWI) acquisition. In this study we investigate feasibility synthesizing standard DWI data multi-parametric (mp)-MRI by employing conditional generative adve...

2016
Yanchun Wang Zhen Li Xiaoyan Meng Xuemei Hu Yaqi Shen John Morelli Hui Lin Zhongping Zhang Daoyu Hu

This study compared the imaging quality, diagnostic accuracy, and apparent diffusion coefficient (ADC) values of reduced field-of-view (rFOV) diffusion-weighted imaging (DWI) and full field-of-view (fFOV) single-shot echo-planar imaging with regard to patients with nonmuscle-invasive or muscle-invasive bladder cancer.Thirty-nine patients with 60 bladder tumors underwent rFOV and fFOV DWI in thi...

Journal: :Stroke 2012
Greg Zaharchuk Ibraheem S El Mogy Nancy J Fischbein Gregory W Albers

BACKGROUND AND PURPOSE The perfusion-weighted imaging (PWI)-diffusion-weighted imaging (DWI) mismatch paradigm is widely used in stroke imaging studies. Arterial spin labeling (ASL) is an alternative perfusion method that does not require contrast. This study compares the agreement of ASL-DWI and PWI-DWI mismatch classification in patients with stroke. METHODS This was a retrospective study d...

2016
Soo Yeon Hahn Eun Sook Ko Boo-Kyung Han Yaeji Lim Seonhye Gu Eun Young Ko

To determine the factors influencing the degree of detectability of lesions and diffusion background signals on magnetic resonance diffusion-weighted imaging (DWI) in invasive breast cancer.Institutional review board approval was obtained and patient consent was waived. Patients with newly diagnosed invasive ductal carcinoma, who underwent preoperative breast magnetic resonance imaging with DWI...

2014
Anwar Padhani Dow-Mu Koh

Whole-body diffusion-weighted imaging (WB-DWI) can be used to assess malignancy throughout the body for tumour staging and is being applied for the assessment of treatment response. One of the current unmet needs in oncology is the assessment of metastatic bone disease and diffuse bone marrow involvement, for which WB-DWI appears highly promising. For WB-DWI to be deployed successfully, meticul...

Journal: :Seminars in musculoskeletal radiology 2009
Olaf Dietrich Andreas Biffar Maximilian F Reiser Andrea Baur-Melnyk

In diffusion-weighted magnetic resonance imaging (DWI-MRI), the observed MRI signal intensity is attenuated by the self-diffusion of water molecules. DWI can provide information about the microscopic structure and organization of biological tissue and thus can depict various pathological changes of organs or tissues. DWI has been successfully used for the characterization of bone marrow alterat...

Journal: :AJNR. American journal of neuroradiology 2009
T-H Cho N Nighoghossian F Tahon C Némoz M Hermier F Salkine L Derex P Trouillas J-C Froment F Turjman

BACKGROUND AND PURPOSE The benefit of recanalization in basilar artery occlusion (BAO) has been established. The baseline extent of brain stem damage may also influence the outcome. We investigated whether a baseline diffusion-weighted imaging (DWI) score may provide additional prognostic value in BAO. MATERIALS AND METHODS We analyzed baseline clinical and DWI parameters in consecutive patie...

2015
Lian Zuo Yue Zhang Xiahong Xu Ying Li Huan Bao Junjie Hao Xin Wang Gang Li

We aimed to investigate the clinicoradiologic determinants of negative diffusion-weighted image (DWI) results in patients with acute cerebral infarction (ACI). The medical records were reviewed of ACI patients. Patients were divided to the DWI positive and negative group. Positive DWI was used as independent variable and patients' clinicoradiologic factors were used as co-variables for multivar...

Journal: :Diagnostic and interventional radiology 2014
Lars Kamper Alexander Sascha Brandt Hendrik Ekamp Nadine Abanador-Kamper Werner Piroth Stephan Roth Patrick Haage

PURPOSE We aimed to evaluate diffusion-weighted imaging (DWI) findings in patients with treated and untreated retroperitoneal fibrosis (RPF). METHODS We analyzed magnetic resonance imaging examinations of 44 RPF patients (36 male, 8 female), of which 15 were untreated and 29 were under therapy. Qualitative DWI and T1 postcontrast signal intensities and the largest perivascular extent of RPF w...

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