نتایج جستجو برای: functional mri
تعداد نتایج: 676428 فیلتر نتایج به سال:
introduction: recently, magnetic resonance spectroscopic imaging (mrsi), as a functional imaging method, has been used for clinical target volume definition. in this study, we used this method to define the target volume in prostate radiotherapy. material and method: in this study, we used images of 20 prostate cancer cases. mrsi and mri images were fused with ct images. then, treatment plannin...
Functional MRI is an imaging technique that provides high resolution information about brain blood ow and oxygenation. This information is used to deduce which regions of the brain are activated by various stimuli. Analysis of functional MRI data is complicated by the low signal-to-noise ratios typically encountered. Two diierent wavelet-based noise removal algorithms are investigated for poten...
Functional brain imaging studies in chronic neuropathic pain patients have lagged far behind equivalent studies in acute pain. In the past few years, this trend has begun to shift. This article discusses the novel approach of studying brain activity for spontaneous pain and its modulation by pharmacologic manipulation. We argue that the approach provides a solid methodology for studying clinica...
Although pregnancy-induced hormonal changes have been shown to alter the brain at the neuronal level, the exact effects of pregnancy on brain at the tissue level remain unclear. In this study, diffusion tensor imaging (DTI) and resting-state functional MRI (rsfMRI) were employed to investigate and document the effects of pregnancy on the structure and function of the brain tissues. Fifteen Spra...
♦ Data Issues: Artifacts and Quality In all scientific fields, the primary data are subject to contamination which can severely bias the conclusions. In FMRI, the primary data are time series of 3D images, which can be grossly or subtly damaged by scanner and subject artifacts. Scanner artifacts should be minimized by carrying out daily quality checks with FMRI-like phantom scans, to make sure ...
Magnetic resonance imaging (MRI) is increasingly being used in the diagnostic work-up of patients with multiple myeloma. Since 2014, MRI findings are included in the new diagnostic criteria proposed by the International Myeloma Working Group. Patients with smouldering myeloma presenting with more than one unequivocal focal lesion in the bone marrow on MRI are considered having symptomatic myelo...
In vivo imaging techniques can be integrated with classical histochemistry to create an actual histochemistry of water. In particular, Magnetic Resonance Imaging (MRI), an imaging technique primarily used as diagnostic tool in clinical/preclinical research, has excellent anatomical resolution, unlimited penetration depth and intrinsic soft tissue contrast. Thanks to the technological developmen...
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