نتایج جستجو برای: mri نمای dw
تعداد نتایج: 113134 فیلتر نتایج به سال:
BACKGROUND Advanced diagnostic and therapeutic developments may yield novel prognostic factors in patients with glioblastoma multiforme (GBM). PURPOSE To validate the predictive values of pretreatment quantitative diffusion-weighted (DW) magnetic resonance imaging (MRI) and MRI performed within 72 h after surgery in patients with GBM. MATERIAL AND METHODS Between January 2000 and September ...
The purpose of the study was to develop and evaluate technique for volumetric tumor segmentation based on diffusion-weighted magnetic resonance imaging (DW-MRI) in predicting assessing response chemotherapy patients with bladder cancer (BC). Material Methods . We examined 26 morphologically verified transitional cell carcinoma bladder. group characterized by presence one or several tumors a siz...
The purpose of this study was to determine the value of different imaging modalities, that is, magnetic resonance imaging/spectroscopy (MRI/MRS) and positron emission tomography (PET), to assess early tumor response to sorafenib with or without radiotherapy. Diffusion-weighted (DW)-MRI, choline (1)H MRS at 11.7 T, and (18)F-FLT PET imaging were used to image fibrosarcoma (FSaII) tumor-bearing m...
We build on previous work to show how serial diffusion-weighted MRI (DW-MRI) data can be used to estimate proliferation rates in a rat model of brain cancer. Thirteen rats were inoculated intracranially with 9L tumor cells; eight rats were treated with the chemotherapeutic drug 1,3-bis(2-chloroethyl)-1-nitrosourea and five rats were untreated controls. All animals underwent DW-MRI immediately b...
The effectiveness of the radiosensitizer gemcitabine (GEM) was evaluated in a mouse glioma along with the imaging biomarker diffusion-weighted magnetic resonance imaging (DW-MRI) for early detection of treatment effects. A genetically engineered murine GBM model [Ink4a-Arf(-/-) Pten(loxP/loxP)/Ntv-a RCAS/PDGF(+)/Cre(+)] was treated with gemcitabine (GEM), temozolomide (TMZ) +/- ionizing radiati...
In recent years diffusion-weighted MRI (DW-MRI) gained increasing importance in applications outside the brain. The main applications of this noninvasive technique in the body focus on tissue characterization, functional evaluation and predicting and monitoring treatment response in a broad spectrum of lesions and organs (1). The kidney is a particularly interesting organ to analyze by DW-MRI b...
Diffusion-Weighted MRI (DW-MRI) is subject to random noise yielding measures that are different from their real values, and thus biasing the subsequently estimated tensors. The Non-Local Means (NLMeans) filter has recently been proposed to denoise MRI with high signal-to-noise ratio (SNR). This filter has been shown to allow the best restoration of image intensities for the estimation of diffus...
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