Published in Magn Reson Med on December 01, 2003
Assessment of glycosaminoglycan concentration in vivo by chemical exchange-dependent saturation transfer (gagCEST). Proc Natl Acad Sci U S A (2008) 4.43
Chemical exchange saturation transfer (CEST): what is in a name and what isn't? Magn Reson Med (2011) 4.08
MRI detection of glycogen in vivo by using chemical exchange saturation transfer imaging (glycoCEST). Proc Natl Acad Sci U S A (2007) 3.97
Differentiation between glioma and radiation necrosis using molecular magnetic resonance imaging of endogenous proteins and peptides. Nat Med (2010) 3.62
Water saturation shift referencing (WASSR) for chemical exchange saturation transfer (CEST) experiments. Magn Reson Med (2009) 3.57
In vivo imaging of glucose uptake and metabolism in tumors. Nat Med (2013) 3.01
Practical data acquisition method for human brain tumor amide proton transfer (APT) imaging. Magn Reson Med (2008) 2.93
Quantitative description of the asymmetry in magnetization transfer effects around the water resonance in the human brain. Magn Reson Med (2007) 2.76
MRI thermometry based on PARACEST agents. J Am Chem Soc (2005) 2.47
Alternatives to gadolinium-based metal chelates for magnetic resonance imaging. Chem Rev (2010) 2.25
A concentration-independent method to measure exchange rates in PARACEST agents. Magn Reson Med (2010) 2.17
Nuts and bolts of chemical exchange saturation transfer MRI. NMR Biomed (2013) 1.88
Natural D-glucose as a biodegradable MRI contrast agent for detecting cancer. Magn Reson Med (2012) 1.84
In vivo three-dimensional whole-brain pulsed steady-state chemical exchange saturation transfer at 7 T. Magn Reson Med (2011) 1.78
MR imaging of high-grade brain tumors using endogenous protein and peptide-based contrast. Neuroimage (2010) 1.74
Amide proton transfer imaging of 9L gliosarcoma and human glioblastoma xenografts. NMR Biomed (2008) 1.70
Imaging pH and metastasis. NMR Biomed (2011) 1.67
CEST: from basic principles to applications, challenges and opportunities. J Magn Reson (2012) 1.59
High-throughput screening of chemical exchange saturation transfer MR contrast agents. Contrast Media Mol Imaging (2010) 1.59
Nuclear Overhauser enhancement (NOE) imaging in the human brain at 7T. Neuroimage (2013) 1.58
Fast 3D chemical exchange saturation transfer (CEST) imaging of the human brain. Magn Reson Med (2010) 1.52
CEST-FISP: a novel technique for rapid chemical exchange saturation transfer MRI at 7 T. Magn Reson Med (2010) 1.50
In vivo chemical exchange saturation transfer imaging allows early detection of a therapeutic response in glioblastoma. Proc Natl Acad Sci U S A (2014) 1.44
Saturation power dependence of amide proton transfer image contrasts in human brain tumors and strokes at 3 T. Magn Reson Med (2011) 1.43
Amide proton transfer imaging with improved robustness to magnetic field inhomogeneity and magnetization transfer asymmetry using saturation with frequency alternating RF irradiation. Magn Reson Med (2011) 1.43
Three-dimensional amide proton transfer MR imaging of gliomas: Initial experience and comparison with gadolinium enhancement. J Magn Reson Imaging (2013) 1.43
Imaging the extracellular pH of tumors by MRI after injection of a single cocktail of T1 and T2 contrast agents. NMR Biomed (2011) 1.40
Amide proton transfer imaging of the breast at 3 T: establishing reproducibility and possible feasibility assessing chemotherapy response. Magn Reson Med (2012) 1.35
Simultaneous determination of labile proton concentration and exchange rate utilizing optimal RF power: Radio frequency power (RFP) dependence of chemical exchange saturation transfer (CEST) MRI. J Magn Reson (2009) 1.34
Imaging in vivo extracellular pH with a single paramagnetic chemical exchange saturation transfer magnetic resonance imaging contrast agent. Mol Imaging (2012) 1.34
Method for high-resolution imaging of creatine in vivo using chemical exchange saturation transfer. Magn Reson Med (2013) 1.31
Amide proton transfer imaging of adult diffuse gliomas: correlation with histopathological grades. Neuro Oncol (2013) 1.29
Toward the Design of MR Agents for Imaging β-Cell Function. Curr Med Chem Immunol Endocr Metab Agents (2004) 1.28
Multi-angle ratiometric approach to measure chemical exchange in amide proton transfer imaging. Magn Reson Med (2011) 1.28
Development of chemical exchange saturation transfer at 7 T. Magn Reson Med (2011) 1.26
APT-weighted and NOE-weighted image contrasts in glioma with different RF saturation powers based on magnetization transfer ratio asymmetry analyses. Magn Reson Med (2013) 1.18
Quantitative tissue pH measurement during cerebral ischemia using amine and amide concentration-independent detection (AACID) with MRI. J Cereb Blood Flow Metab (2014) 1.15
On B1 inhomogeneity correction of in vivo human brain glutamate chemical exchange saturation transfer contrast at 7T. Magn Reson Med (2012) 1.15
Transforming thymidine into a magnetic resonance imaging probe for monitoring gene expression. J Am Chem Soc (2013) 1.15
On the origins of chemical exchange saturation transfer (CEST) contrast in tumors at 9.4 T. NMR Biomed (2014) 1.14
Defining an Acidosis-Based Ischemic Penumbra from pH-Weighted MRI. Transl Stroke Res (2011) 1.11
A new method for detecting exchanging amide protons using chemical exchange rotation transfer. Magn Reson Med (2012) 1.09
Magnetic resonance in the era of molecular imaging of cancer. Magn Reson Imaging (2011) 1.08
Simulation and optimization of pulsed radio frequency irradiation scheme for chemical exchange saturation transfer (CEST) MRI-demonstration of pH-weighted pulsed-amide proton CEST MRI in an animal model of acute cerebral ischemia. Magn Reson Med (2011) 1.08
Chemical Exchange Saturation Transfer (CEST) Imaging: Description of Technique and Potential Clinical Applications. Curr Radiol Rep (2013) 1.08
A simple model for understanding the origin of the amide proton transfer MRI signal in tissue. Appl Magn Reson (2012) 1.07
CEST phase mapping using a length and offset varied saturation (LOVARS) scheme. Magn Reson Med (2012) 1.07
CEST signal at 2ppm (CEST@2ppm) from Z-spectral fitting correlates with creatine distribution in brain tumor. NMR Biomed (2014) 1.06
Paramagnetic and fluorescent liposomes for target-specific imaging and therapy of tumor angiogenesis. Angiogenesis (2010) 1.05
Quantitative assessment of amide proton transfer (APT) and nuclear overhauser enhancement (NOE) imaging with extrapolated semi-solid magnetization transfer reference (EMR) signals: Application to a rat glioma model at 4.7 tesla. Magn Reson Med (2015) 1.03
Size-induced enhancement of chemical exchange saturation transfer (CEST) contrast in liposomes. J Am Chem Soc (2008) 1.03
Ultrafast scanning of exchangeable sites by NMR spectroscopy. Angew Chem Int Ed Engl (2013) 1.02
Quantitative characterization of nuclear overhauser enhancement and amide proton transfer effects in the human brain at 7 tesla. Magn Reson Med (2012) 1.02
Variable delay multi-pulse train for fast chemical exchange saturation transfer and relayed-nuclear overhauser enhancement MRI. Magn Reson Med (2013) 1.01
Correlating tissue outcome with quantitative multiparametric MRI of acute cerebral ischemia in rats. J Cereb Blood Flow Metab (2009) 1.00
Contributors to contrast between glioma and brain tissue in chemical exchange saturation transfer sensitive imaging at 3 Tesla. Neuroimage (2014) 0.98
Establishing the Lysine-rich Protein CEST Reporter Gene as a CEST MR Imaging Detector for Oncolytic Virotherapy. Radiology (2015) 0.97
Tuning phenols with Intra-Molecular bond Shifted HYdrogens (IM-SHY) as diaCEST MRI contrast agents. Chemistry (2014) 0.97
Detection of rapidly exchanging compounds using on-resonance frequency-labeled exchange (FLEX) transfer. Magn Reson Med (2012) 0.96
Three-dimensional turbo-spin-echo amide proton transfer MR imaging at 3-Tesla and its application to high-grade human brain tumors. Mol Imaging Biol (2013) 0.95
Towards extracellular Ca2+ sensing by MRI: synthesis and calcium-dependent 1H and 17O relaxation studies of two novel bismacrocyclic Gd3+ complexes. J Biol Inorg Chem (2007) 0.95
Uniform magnetization transfer in chemical exchange saturation transfer magnetic resonance imaging. Sci Rep (2013) 0.94
Amide proton transfer imaging of the human breast at 7T: development and reproducibility. NMR Biomed (2013) 0.94
Magnetization transfer (MT) asymmetry around the water resonance in human cervical spinal cord. J Magn Reson Imaging (2009) 0.94
Imaging amide proton transfer and nuclear overhauser enhancement using chemical exchange rotation transfer (CERT). Magn Reson Med (2013) 0.94
Translational molecular imaging for cancer. Cancer Imaging (2005) 0.93
Assessment of MRI parameters as imaging biomarkers for radiation necrosis in the rat brain. Int J Radiat Oncol Biol Phys (2012) 0.93
Quantitative multiparametric MRI assessment of glioma response to radiotherapy in a rat model. Neuro Oncol (2013) 0.93
Characterization of lung cancer by amide proton transfer (APT) imaging: an in-vivo study in an orthotopic mouse model. PLoS One (2013) 0.92
Simultaneous detection and separation of hyperacute intracerebral hemorrhage and cerebral ischemia using amide proton transfer MRI. Magn Reson Med (2015) 0.91
Mapping glutamate in subcortical brain structures using high-resolution GluCEST MRI. NMR Biomed (2013) 0.89
Chemical exchange saturation transfer (CEST) imaging with fast variably-accelerated sensitivity encoding (vSENSE). Magn Reson Med (2016) 0.89
Highly accelerated chemical exchange saturation transfer (CEST) measurements with linear algebraic modeling. Magn Reson Med (2015) 0.89
MR chemical exchange imaging with spin-lock technique (CESL): a theoretical analysis of the Z-spectrum using a two-pool R(1ρ) relaxation model beyond the fast-exchange limit. Phys Med Biol (2012) 0.89
Quantitative magnetization transfer imaging of rodent glioma using selective inversion recovery. NMR Biomed (2013) 0.89
Investigation of chemical exchange at intermediate exchange rates using a combination of chemical exchange saturation transfer (CEST) and spin-locking methods (CESTrho). Magn Reson Med (2011) 0.89
Molecular MRI differentiation between primary central nervous system lymphomas and high-grade gliomas using endogenous protein-based amide proton transfer MR imaging at 3 Tesla. Eur Radiol (2015) 0.88
In vivo chemical exchange saturation transfer imaging of creatine (CrCEST) in skeletal muscle at 3T. J Magn Reson Imaging (2013) 0.88
Anthranilic acid analogs as diamagnetic CEST MRI contrast agents that feature an intramolecular-bond shifted hydrogen. Contrast Media Mol Imaging (2014) 0.88
Advantages of chemical exchange-sensitive spin-lock (CESL) over chemical exchange saturation transfer (CEST) for hydroxyl- and amine-water proton exchange studies. NMR Biomed (2014) 0.87
Current and emerging quantitative magnetic resonance imaging methods for assessing and predicting the response of breast cancer to neoadjuvant therapy. Breast Cancer (Dove Med Press) (2012) 0.87
Evaluating the use of a continuous approximation for model-based quantification of pulsed chemical exchange saturation transfer (CEST). J Magn Reson (2012) 0.87
Application of chemical exchange saturation transfer (CEST) MRI for endogenous contrast at 7 Tesla. J Neuroimaging (2013) 0.86
Assessing Amide Proton Transfer (APT) MRI Contrast Origins in 9 L Gliosarcoma in the Rat Brain Using Proteomic Analysis. Mol Imaging Biol (2015) 0.86
NOrmalized MAgnetization Ratio (NOMAR) filtering for creation of tissue selective contrast maps. Magn Reson Med (2012) 0.86
Observation of true and pseudo NOE signals using CEST-MRI and CEST-MRS sequences with and without lipid suppression. Magn Reson Med (2014) 0.86
Nuclear overhauser enhancement mediated chemical exchange saturation transfer imaging at 7 Tesla in glioblastoma patients. PLoS One (2014) 0.86
Alternate ascending/descending directional navigation approach for imaging magnetization transfer asymmetry. Magn Reson Med (2010) 0.86
UCEPR: Ultrafast localized CEST-spectroscopy with PRESS in phantoms and in vivo. Magn Reson Med (2015) 0.85
Noninvasive imaging of infection after treatment with tumor-homing bacteria using Chemical Exchange Saturation Transfer (CEST) MRI. Magn Reson Med (2013) 0.84
Quantitative assessment of the effects of water proton concentration and water T1 changes on amide proton transfer (APT) and nuclear overhauser enhancement (NOE) MRI: The origin of the APT imaging signal in brain tumor. Magn Reson Med (2016) 0.83
pCEST: Positive contrast using Chemical Exchange Saturation Transfer. J Magn Reson (2011) 0.83
Amide proton transfer imaging of the human brain. Methods Mol Biol (2011) 0.83
Amide proton transfer-weighted imaging of the head and neck at 3 T: a feasibility study on healthy human subjects and patients with head and neck cancer. NMR Biomed (2014) 0.83
Applying amide proton transfer-weighted MRI to distinguish pseudoprogression from true progression in malignant gliomas. J Magn Reson Imaging (2016) 0.82
Magnetization transfer contrast-suppressed imaging of amide proton transfer and relayed nuclear overhauser enhancement chemical exchange saturation transfer effects in the human brain at 7T. Magn Reson Med (2015) 0.82
Novel contrast mechanisms at 3 Tesla and 7 Tesla. Semin Musculoskelet Radiol (2008) 0.82
Chemical exchange saturation transfer by intermolecular double-quantum coherence. J Magn Reson (2008) 0.82
Tumor-specific expression and detection of a CEST reporter gene. Magn Reson Med (2015) 0.82
Fiber tract-based atlas of human white matter anatomy. Radiology (2003) 10.18
Fiber tracking: principles and strategies - a technical review. NMR Biomed (2002) 8.52
DtiStudio: resource program for diffusion tensor computation and fiber bundle tracking. Comput Methods Programs Biomed (2006) 7.65
Treatment of medulloblastoma with hedgehog pathway inhibitor GDC-0449. N Engl J Med (2009) 7.23
Using the amide proton signals of intracellular proteins and peptides to detect pH effects in MRI. Nat Med (2003) 6.57
Tract probability maps in stereotaxic spaces: analyses of white matter anatomy and tract-specific quantification. Neuroimage (2007) 5.23
Determining the longitudinal relaxation time (T1) of blood at 3.0 Tesla. Magn Reson Med (2004) 4.25
Artificial reporter gene providing MRI contrast based on proton exchange. Nat Biotechnol (2007) 3.87
Atlas-based whole brain white matter analysis using large deformation diffeomorphic metric mapping: application to normal elderly and Alzheimer's disease participants. Neuroimage (2009) 3.74
Imaging cortical association tracts in the human brain using diffusion-tensor-based axonal tracking. Magn Reson Med (2002) 3.67
Differentiation between glioma and radiation necrosis using molecular magnetic resonance imaging of endogenous proteins and peptides. Nat Med (2010) 3.62
Water saturation shift referencing (WASSR) for chemical exchange saturation transfer (CEST) experiments. Magn Reson Med (2009) 3.57
Multi-parametric neuroimaging reproducibility: a 3-T resource study. Neuroimage (2010) 3.32
Pediatric diffusion tensor imaging: normal database and observation of the white matter maturation in early childhood. Neuroimage (2005) 3.11
Assessing the economic challenges posed by orphan drugs. Int J Technol Assess Health Care (2007) 3.09
Practical data acquisition method for human brain tumor amide proton transfer (APT) imaging. Magn Reson Med (2008) 2.93
Amide proton transfer imaging of human brain tumors at 3T. Magn Reson Med (2006) 2.87
Human brain white matter atlas: identification and assignment of common anatomical structures in superficial white matter. Neuroimage (2008) 2.86
Quantitative description of proton exchange processes between water and endogenous and exogenous agents for WEX, CEST, and APT experiments. Magn Reson Med (2004) 2.80
Detection of the ischemic penumbra using pH-weighted MRI. J Cereb Blood Flow Metab (2006) 2.77
Quantitative description of the asymmetry in magnetization transfer effects around the water resonance in the human brain. Magn Reson Med (2007) 2.76
Spatial normalization of diffusion tensor fields. Magn Reson Med (2003) 2.70
White and gray matter development in human fetal, newborn and pediatric brains. Neuroimage (2006) 2.55
New "multicolor" polypeptide diamagnetic chemical exchange saturation transfer (DIACEST) contrast agents for MRI. Magn Reson Med (2008) 2.48
Effects of signal-to-noise ratio on the accuracy and reproducibility of diffusion tensor imaging-derived fractional anisotropy, mean diffusivity, and principal eigenvector measurements at 1.5 T. J Magn Reson Imaging (2007) 2.44
Multi-contrast human neonatal brain atlas: application to normal neonate development analysis. Neuroimage (2011) 2.41
Analysis of noise effects on DTI-based tractography using the brute-force and multi-ROI approach. Magn Reson Med (2004) 2.35
Scatter factor/hepatocyte growth factor in brain tumor growth and angiogenesis. Neuro Oncol (2005) 2.24
Oxygenation and hematocrit dependence of transverse relaxation rates of blood at 3T. Magn Reson Med (2007) 2.22
Atlas-guided tract reconstruction for automated and comprehensive examination of the white matter anatomy. Neuroimage (2010) 2.21
Dual-modality monitoring of targeted intraarterial delivery of mesenchymal stem cells after transient ischemia. Stroke (2008) 2.18
DTI tractography based parcellation of white matter: application to the mid-sagittal morphology of corpus callosum. Neuroimage (2005) 2.13
Optimization of the irradiation power in chemical exchange dependent saturation transfer experiments. J Magn Reson (2005) 2.11
Multi-contrast large deformation diffeomorphic metric mapping for diffusion tensor imaging. Neuroimage (2009) 2.01
Routine clinical brain MRI sequences for use at 3.0 Tesla. J Magn Reson Imaging (2005) 1.94
Theoretical and experimental investigation of the VASO contrast mechanism. Magn Reson Med (2006) 1.94
Gliadel (BCNU) wafer plus concomitant temozolomide therapy after primary resection of glioblastoma multiforme. J Neurosurg (2009) 1.91
Atlas-based analysis of neurodevelopment from infancy to adulthood using diffusion tensor imaging and applications for automated abnormality detection. Neuroimage (2010) 1.89
A framework for callosal fiber distribution analysis. Neuroimage (2002) 1.87
Natural D-glucose as a biodegradable MRI contrast agent for detecting cancer. Magn Reson Med (2012) 1.84
Tumor-specific imaging through progression elevated gene-3 promoter-driven gene expression. Nat Med (2010) 1.81
Three-dimensional anatomical characterization of the developing mouse brain by diffusion tensor microimaging. Neuroimage (2003) 1.80
In vivo three-dimensional whole-brain pulsed steady-state chemical exchange saturation transfer at 7 T. Magn Reson Med (2011) 1.78
c-Met signaling induces a reprogramming network and supports the glioblastoma stem-like phenotype. Proc Natl Acad Sci U S A (2011) 1.75
Vascular gene expression in nonneoplastic and malignant brain. Am J Pathol (2004) 1.71
Developing MR reporter genes: promises and pitfalls. NMR Biomed (2007) 1.70
Amide proton transfer imaging of 9L gliosarcoma and human glioblastoma xenografts. NMR Biomed (2008) 1.70
Sensitive CEST agents based on nucleic acid imino proton exchange: detection of poly(rU) and of a dendrimer-poly(rU) model for nucleic acid delivery and pharmacology. Magn Reson Med (2003) 1.68
Multiparametric magnetic resonance imaging analysis of the corticospinal tract in multiple sclerosis. Neuroimage (2007) 1.62
High-throughput screening of chemical exchange saturation transfer MR contrast agents. Contrast Media Mol Imaging (2010) 1.59
The humanistic burden of hereditary angioedema: Impact on health-related quality of life, productivity, and depression. Allergy Asthma Proc (2010) 1.58
Nuclear Overhauser enhancement (NOE) imaging in the human brain at 7T. Neuroimage (2013) 1.58
Cancer stem cells: distinct entities or dynamically regulated phenotypes? Cancer Res (2012) 1.58
Experimental measurement of extravascular parenchymal BOLD effects and tissue oxygen extraction fractions using multi-echo VASO fMRI at 1.5 and 3.0 T. Magn Reson Med (2005) 1.56
In vivo targeting of SF/HGF and c-met expression via U1snRNA/ribozymes inhibits glioma growth and angiogenesis and promotes apoptosis. FASEB J (2001) 1.55
Systemic anti-hepatocyte growth factor monoclonal antibody therapy induces the regression of intracranial glioma xenografts. Clin Cancer Res (2006) 1.54
MRI-detectable pH nanosensors incorporated into hydrogels for in vivo sensing of transplanted-cell viability. Nat Mater (2013) 1.53
PTEN has tumor-promoting properties in the setting of gain-of-function p53 mutations. Cancer Res (2008) 1.52
Fast 3D chemical exchange saturation transfer (CEST) imaging of the human brain. Magn Reson Med (2010) 1.52
On the relationship between seed-based and ICA-based measures of functional connectivity. Magn Reson Med (2011) 1.51
Abnormal DNA methylation of CD133 in colorectal and glioblastoma tumors. Cancer Res (2008) 1.51
Predictors of neurocognitive decline after carotid endarterectomy. Neurosurgery (2006) 1.49
Correction of B0 susceptibility induced distortion in diffusion-weighted images using large-deformation diffeomorphic metric mapping. Magn Reson Imaging (2008) 1.48
Brain white matter anatomy of tumor patients evaluated with diffusion tensor imaging. Ann Neurol (2002) 1.46
MR tracking of transplanted cells with "positive contrast" using manganese oxide nanoparticles. Magn Reson Med (2008) 1.46
ABCG2/BCRP expression modulates D-Luciferin based bioluminescence imaging. Cancer Res (2007) 1.45
Three-dimensional amide proton transfer MR imaging of gliomas: Initial experience and comparison with gadolinium enhancement. J Magn Reson Imaging (2013) 1.43
Targeting the c-Met pathway potentiates glioblastoma responses to gamma-radiation. Clin Cancer Res (2005) 1.42
Natural history of intracranial atherosclerosis: a critical review. Neurosurgery (2006) 1.42
An account of the discrepancy between MRI and PET cerebral blood flow measures. A high-field MRI investigation. NMR Biomed (2006) 1.42
Improvement in the standard treatment for experimental glioma by fusing antibody Fc domain to endostatin. J Neurosurg (2011) 1.42
Flow territory mapping of the cerebral arteries with regional perfusion MRI. Stroke (2004) 1.41
Monitoring enzyme activity using a diamagnetic chemical exchange saturation transfer magnetic resonance imaging contrast agent. J Am Chem Soc (2011) 1.41
Novel approach to the measurement of absolute cerebral blood volume using vascular-space-occupancy magnetic resonance imaging. Magn Reson Med (2005) 1.41
Transcription-dependent epidermal growth factor receptor activation by hepatocyte growth factor. Mol Cancer Res (2008) 1.37
The scatter factor/hepatocyte growth factor: c-met pathway in human embryonal central nervous system tumor malignancy. Cancer Res (2005) 1.35
Pulsed magnetization transfer imaging with body coil transmission at 3 Tesla: feasibility and application. Magn Reson Med (2006) 1.34
Three-dimensional diffusion tensor magnetic resonance microimaging of adult mouse brain and hippocampus. Neuroimage (2002) 1.33
Glycolytic glioma cells with active glycogen synthase are sensitive to PTEN and inhibitors of PI3K and gluconeogenesis. Lab Invest (2005) 1.27
Sickle cell disease: continuous arterial spin-labeling perfusion MR imaging in children. Radiology (2003) 1.26
Diffusion tensor MR imaging of the brain and white matter tractography. AJR Am J Roentgenol (2002) 1.24
Quantitative analysis of brain pathology based on MRI and brain atlases--applications for cerebral palsy. Neuroimage (2010) 1.24
A phase II study evaluating the efficacy and safety of AMG 102 (rilotumumab) in patients with recurrent glioblastoma. Neuro Oncol (2011) 1.23
Optimization of SABRE for polarization of the tuberculosis drugs pyrazinamide and isoniazid. J Magn Reson (2013) 1.23
Detrimental effects of BOLD signal in arterial spin labeling fMRI at high field strength. Magn Reson Med (2006) 1.21
Proton MR spectroscopic and diffusion tensor brain MR imaging in X-linked adrenoleukodystrophy: initial experience. Radiology (2002) 1.21