Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Mar 2006
Improved temporal clustering analysis method for detecting multiple response peaks in fMRI.
To develop an improved temporal clustering analysis (TCA) method for detecting multiple active peaks by running the method once. ⋯ The new method is effective in detecting multiple activations even when the timing and location of the brain activation are completely unknown.
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J Magn Reson Imaging · Mar 2006
Elimination of residual blood flow-related signal in 3D volume-selective TSE arterial wall imaging using velocity-sensitive phase reconstruction.
To improve 3D volume-selective turbo spin-echo (TSE) arterial wall imaging by introducing velocity phase sensitivity to the sequence. ⋯ Introducing velocity sensitivity reduces unwanted, potentially misleading residual blood in 3D volume-selective vessel wall imaging.
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J Magn Reson Imaging · Mar 2006
Magnetic resonance brain perfusion imaging with voxel-specific arterial input functions.
To propose an automatic method for estimating voxel-specific arterial input functions (AIFs) in dynamic contrast brain perfusion imaging. ⋯ Initial results suggest that the proposed method can replace the tedious and difficult task of manually selecting an AIF, while simultaneously providing better differentiation between time-dependent hemodynamic parameters.
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J Magn Reson Imaging · Mar 2006
Swallowing, arterial pulsation, and breathing induce motion artifacts in carotid artery MRI.
To identify and quantify the potential sources of motion in carotid artery imaging. ⋯ Pulsation, breathing, and swallowing are sources of significant motion in the carotid artery wall. Such motion should be considered in the future to improve carotid artery image quality.
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To explore subjects' attitudes and expectations concerning the detection and management of incidental findings in neuroimaging research. ⋯ Clarity about procedures for handling incidental findings when obtaining written and verbal informed consent is essential to ensure that the subjects' expectations are consistent with the purpose and scope of the research.