Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Mar 2006
Quantitative myocardial infarction on delayed enhancement MRI. Part I: Animal validation of an automated feature analysis and combined thresholding infarct sizing algorithm.
To develop a computer algorithm to measure myocardial infarct size in gadolinium-enhanced magnetic resonance (MR) imaging and to validate this method using a canine histopathological reference. ⋯ The FACT algorithm accurately measured MI size on delayed enhancement MR imaging in vivo and ex vivo. The FACT algorithm was also more accurate than human manual contouring and simple intensity thresholding approaches.
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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
Comparative StudyPulsed arterial spin labeling parameter optimization for an elderly population.
To optimize pulsed arterial spin labeling (PASL) parameters for the elderly to take into account possible perfusion changes that occur in the brain with age. ⋯ For acquiring perfusion-weighted images with minimal intravascular signal and adequate tissue signal for PASL studies of cerebral perfusion in the elderly, a longer inversion time is advantageous.
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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
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.