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  • spin-echo
  • Alternatively, real-time spin-echo single-voxel spectroscopy (SE SVS) has recently been introduced for spatially specific BOLD neurofeedback at 3 T and at 7 T. However, currently it is not known how neurofeedback based on real-time SE SVS compares to real-time GE EPI-based. (uzh.ch)
  • Diffusion-weighted MR imaging was done by using a single-shot spin-echo echo-planar sequence. (ajnr.org)
  • DWI uses a spin-echo echo-planar technique (EPI) that is more sensitive than spin-echo T2-weighted imaging to susceptibility effects. (ajnr.org)
  • In another study, which compared findings from an animal model with clinical examinations, intracerebral hematoma of less than 24 hours' duration was shown to have a characteristic hypointense rim surrounding variable, heterogeneous hyperintensity on T2-weighted spin-echo images (11) . (ajnr.org)
  • Pulses
  • The simultaneous SE refocusing of SIR imaging at 7 Tesla advantageously reduced SAR by using fewer RF refocusing pulses and by shifting fat signal out of the image plane so that fat suppression pulses were not required. (ox.ac.uk)
  • 2016
  • Vargas HA, Hotker AM, Goldman DA, Moskowitz CS, Gondo T, Matsumoto K et al (2016) Updated prostate imaging reporting and data system (PIRADS v2) recommendations for the detection of clinically significant prostate cancer using multiparametric MRI: critical evaluation using whole-mount pathology as standard of reference. (springer.com)
  • conventional
  • Two blinded radiologists independently reviewed two sets of randomized images: conventional spine MRI without ZOOM-EPI DTI, and conventional spine MRI with ZOOM-EPI DTI. (thejns.org)
  • We evaluated the anisotropy by using DTI and signal-intensity changes on conventional MR imaging in the CST to determine whether these findings are correlated with limb motor deficit in patients with MCA ischemic stroke. (ajnr.org)
  • 3 WD consists of the anterograde degeneration of axons and their myelin sheaths after proximal axonal or cell body injury from numerous causes, including stroke, and has been demonstrated through experiments, postmortem studies, transcranial magnetic stimulation, and conventional imaging. (ajnr.org)
  • moreover, the extent of WD is difficult to quantify on conventional MR imaging and is not consistent in all patients with motor deficit. (ajnr.org)
  • clinical
  • Dr. Semelka has authored over 300 peer-reviewed articles, 12 textbooks including the Wiley Abdominal-Pelvic MRI and Current Clinical Imaging series and is an internationally acclaimed authority in the field. (wiley.com)
  • This study highlights the utility of imaging follow-up at 30 days and the potential of DTI as a surrogate marker in clinical trials. (ajnr.org)
  • connectivity
  • Recent graph theoretical analyses of ICN and diffusion tensor imaging data suggest that children may move through distinct connectivity milestones en route to a mature adult pattern ( 29 - 31 ). (pnas.org)
  • Therefore, functional connectivity in such patients cannot be fully demonstrated with fcMR imaging. (ajnr.org)
  • In healthy subjects, functional connectivity MR (fcMR) imaging provides a means of mapping auditory, sensorimotor, and other regions of eloquent cortex. (ajnr.org)
  • positron
  • These results are consistent with prior studies that have used positron emission tomography imaging with 15O-labeled water as a blood flow tracer. (pnas.org)
  • These include planar Xenon ( 6 - 9 ), single photon emission tomography ( 8 , 10 - 14 ), positron-emission tomography ( 15 , 16 ), magnetoencephalography ( 17 , 18 ), and MRI ( 19 - 21 ). (pnas.org)
  • Fusion imaging includes positron emission tomography-computed tomographic (PET-CT) scanning, CT-magnetic resonance fusion imaging, and single photon emissions computed tomographic (SPECT) fusion imaging. (thefreedictionary.com)
  • Processing
  • In contrast to prior neuroimaging studies, we assessed not only cortical/subcortical response to emotion-evoking images, but also how engagement of these systems alters information processing in a discrete visuospatial task. (jneurosci.org)
  • tissue
  • The cut-off value of nEPID has not yet been determined, however, as fused thin-slice nEPID and computed tomography (nEPID-CT) color imaging cannot correctly distinguish cholesteatoma from other soft tissue. (ismrm.org)
  • A form of ultrasonography that incorporates both gray-scale imaging for the architecture of the tissue and a color Doppler signal for flow or movement within the tissue. (thefreedictionary.com)
  • correlative
  • A role for iron accumulation in the pathology of TBI has been suggested by a recent correlative MR imaging-histologic study 11 that examined the brains of mice after a controlled cortical impact injury. (ajnr.org)
  • Patients
  • Dual-echo and Diffusion -weighted scans were obtained from 35 patients with Relapsing/Remitting MS and 24 sex- and age-matched normal controls. (tripod.com)
  • Postcontrast T 1 -weighted images were also obtained from the patients. (tripod.com)
  • In general, unenhanced CT provides quick, easily accessible, and accurate assessment of various forms of intracranial hemorrhage, and has been used in numerous trial studies as the imaging method by which to select patients who may benefit from thrombolysis. (ajnr.org)
  • Although the effectiveness of fcMR imaging has been confirmed in healthy volunteers, its study in patients has been limited. (ajnr.org)
  • correction
  • To overcome the problem, this master thesis aimed to develop a routine for artefact correction and information extraction from images acquired in a research project at the Karolinska Institutet in Stockholm. (diva-portal.org)
  • vivo
  • His research interests include relaxation and exchange phenomena and in vivo nuclear magnetic resonance spectroscopy and imaging. (wiley.com)
  • nuclear magnetic
  • We'll now concentrate on this spinning characteristic in order to introduce the phenomenon of nuclear magnetic resonance ( NMR ), and we'll see later how images can be formed on this basis. (wikibooks.org)
  • Ultrasound
  • Zhao WP, Chen JY, Zhang L, Li Q, Qin J, Peng S, Li KQ, Wang ZB, Chen WZ (2013) Feasibility of ultrasound-guided high intensity focused ultrasound ablating uterine fibroids with hyperintense on T 2 -weighted MR imaging. (springer.com)
  • suppression
  • Applying diffusion-weighted MRI (DWI) or diffusion tensor imaging (DTI) to the spine poses challenges due to intrinsic spinal anatomy that exacerbates various image-related artifacts, such as signal dropouts or pileups, geometrical distortions, and incomplete fat suppression. (thejns.org)
  • signal
  • 6 , 7 ADC values are expected to vary according to the microstructures or pathophysiologic states of the tissues, and they can be calculated by measuring signal intensities in a series of diffusion-weighted MR images by using different b-values. (ajnr.org)
  • tumors
  • The purpose of this work was to evaluate whether diffusion-weighted MR imaging can be used in differentiating residual or recurrent head and neck tumors from postoperative or postradiation changes. (ajnr.org)
  • Diffusion-weighted MR imaging with ADC measurement has promising results for differentiating residual or recurrent head and neck tumors from postoperative or postradiation changes. (ajnr.org)
  • correlates
  • 4 - 8 Many studies have reported hyperintense signals regarded as WD along the affected CST on T2-weighted or diffusion-weighted imaging weeks or months after stroke, and this finding correlates well with persistent functional disability. (ajnr.org)
  • study
  • 7 , 13 , 14 The aim of this study was to evaluate the role of diffusion-weighted MR imaging in differentiating residual or recurrent head and neck tumor from postoperative or postradiation changes. (ajnr.org)