Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Sep 2007
A new EPI-based dynamic field mapping method: application to retrospective geometrical distortion corrections.
To retrospectively correct for geometrical distortions, a new dynamic field mapping method suitable for dynamic single-shot gradient-echo type echo-planar imaging (GRE-EPI) is proposed. ⋯ Given the minor increase in the acquisition time, this method is well suited for functional magnetic resonance imaging; prospective direction.
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J Magn Reson Imaging · Sep 2007
Three dimensional myoarchitecture of the human tongue determined in vivo by diffusion tensor imaging with tractography.
To study the anatomical relationships involving the intrinsic and extrinsic myofiber populations of the human tongue employing diffusion tensor imaging (DTI) with tractography. ⋯ The current results display for the first time the use of DTI tractography in vivo to visualize the complete structural anatomy of the human tongue and allow us to consider fundamental structure-function relationships.
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J Magn Reson Imaging · Sep 2007
Comparative StudyWhole-body MR imaging vs. FDG-PET: comparison of accuracy of M-stage diagnosis for lung cancer patients.
To conduct a prospective comparison of the accuracy of whole-body MR imaging and positron emission tomography (PET) with fluorine-18 deoxyglucose (FDG) (FDG-PET) to assess the M-stage in lung cancer patients. ⋯ Whole-body MR imaging is an accurate diagnostic technique and may be considered at least as effective as FDG-PET for assessment of the M-stage of lung cancer patients.
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To demonstrate that the use of nonquantitative methods in oxygen-enhanced (OE) lung imaging can be problematic and to present a new approach for quantitative OE lung imaging, which fulfills the requirements for easy application in clinical practice. ⋯ For the purpose of intersubject comparison, OE lung imaging should be performed quantitatively. The proposed hybrid technique produced reliable quantitative results in a short amount of time and, therefore, is suited for clinical use.
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J Magn Reson Imaging · Sep 2007
Non-model-based correction of respiratory motion using beat-to-beat 3D spiral fat-selective imaging.
To demonstrate the feasibility of retrospective beat-to-beat correction of respiratory motion, without the need for a respiratory motion model. ⋯ Non-model-based correction of respiratory motion using 3D spiral fat-selective imaging is feasible, and in this small group of volunteers produced better-quality images than a subject-specific retrospective 3D translation motion model.