Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Apr 2008
Two-dimensional 1H MR spectroscopy of the brain in human immunodeficiency virus (HIV)-infected children.
To measure cerebral metabolites in brains of human immunodeficiency virus (HIV)-infected patients using two-dimensional (2D) proton ((1)H) magnetic resonance spectroscopy (MRS), which enables more sensitive detection of metabolites at lower concentrations and delineation of the components of the different choline (Ch) groups in the frequency domain when compared to one dimensional (1D) (1)H-MRS. ⋯ We have demonstrated for the first time the feasibility of 2D-MRS in HIV-infected children and adolescents to assess cerebral metabolites and found elevated mI and elevated GABA, in the left frontal brain of clinically stable HIV-infected patients. A larger study population is needed to confirm these pilot GABA findings.
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J Magn Reson Imaging · Apr 2008
A single-point Dixon technique for fat-suppressed fast 3D gradient-echo imaging with a flexible echo time.
To develop a single-point Dixon (SPD) technique that requires only data of a single echo with a flexible echo time, and to demonstrate its use for fat-suppressed, T1-weighted contrast agent enhancement studies. ⋯ The SPD technique compares favorably in scan time efficiency and FS uniformity and can be useful for fast T1-weighted and fat-suppressed imaging with contrast agent administration.
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J Magn Reson Imaging · Apr 2008
Comparative StudyComparison between 2D and 3D high-resolution black-blood techniques for carotid artery wall imaging in clinically significant atherosclerosis.
To compare two- (2D) and three-dimensional (3D) black-blood imaging methods for morphological measurements of the carotid artery wall and atherosclerotic plaque. ⋯ 2D and 3D protocols provided comparable morphometric measurements of the carotid artery. The major advantage of 3D imaging is improved small plaque component visualization, while the 2D technique provides higher reliability for image quality.
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J Magn Reson Imaging · Apr 2008
Comparative StudyA fast navigator-gated 3D sequence for delayed enhancement MRI of the myocardium: comparison with breathhold 2D imaging.
To develop a rapid navigator-gated three-dimensional (3DNAV) delayed-enhancement MRI (DE-MRI) sequence for myocardial viability assessment, and to evaluate its performance with breathhold two-dimensional (2DBH) DE-MRI sequence as the reference standard. ⋯ 3DNAV DE-MRI provides improved image quality and similar infarct detection in less scan time compared to the standard 2DBH DE-MRI.
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J Magn Reson Imaging · Apr 2008
Evaluating local hepatocellular carcinoma recurrence post-transcatheter arterial chemoembolization: is diffusion-weighted MRI reliable as an indicator?
To evaluate the detectability of local hepatocellular carcinoma (HCC) recurrence after transcatheter arterial chemoembolization (TACE) by diffusion-weighted MR imaging in correlation with those of gadolinium-enhanced MR imaging. ⋯ Diffusion-weighted MR imaging was not found to be a reliable predictor of local HCC recurrence after TACE as compared with gadolinium-enhanced MR imaging.