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Payette K. Stripping away the mysteries of the brain's insulation: might T1-FFLAIR improve our understanding of prenatal myelination? Eur Radiol 2024; 34:4570-4572. [PMID: 38032402 DOI: 10.1007/s00330-023-10450-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/23/2023] [Accepted: 10/28/2023] [Indexed: 12/01/2023]
Affiliation(s)
- Kelly Payette
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 1St Floor South Wing, London, SE1 7EH, UK.
- Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 1St Floor South Wing, London, SE1 7EH, UK.
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2
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Yamashita S, Fujimori D, Igari S, Yamamoto Y, Mizuuchi T, Mori H, Hayashi H, Tahara K, Sawada T. Unique presentation of acute neuro-Behçet's disease involving a cytotoxic edema core surrounded by vasogenic edema. Mod Rheumatol Case Rep 2024:rxae032. [PMID: 38874595 DOI: 10.1093/mrcr/rxae032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 04/15/2024] [Accepted: 06/13/2024] [Indexed: 06/15/2024]
Abstract
A 53-year-old woman with recurrent stomatitis, genital ulcers, and folliculitis was admitted to our hospital after experiencing visual disturbances for the past two weeks, and a non-throbbing headache for the past three days. She had also developed numbness in her left extremities. An ophthalmological examination revealed inflammatory changes in the eye. Cerebrospinal fluid analysis showed increased cell counts, protein, and interleukin-6 levels. Brain magnetic resonance imaging revealed multiple high signal intensities on T2-weighted (T2W)/fluid-attenuated inversion recovery (FLAIR) images of the pons and occipital and parietal lobes. The T2W/FLAIR high-signal-intensity lesion in the pons was hyperintense on diffusion-weighted imaging (DWI) and hypointense on apparent diffusion coefficient mapping (ADC), suggesting cytotoxic edema. Another high-signal-intensity lesion on T2W/FLAIR was isointense to hyperintense on DWI and hyperintense on ADC, indicating vasogenic edema. The vasogenic edema in the left occipital lobe contained a small core that was hyperintense on DWI and hypointense on ADC, suggesting cytotoxic edema. The patient was diagnosed with acute neuro-Behçet's disease (neuro-BD) and responded well to high-dose glucocorticoid and colchicine treatment. The present report emphasizes that patients with acute neuro-BD may present with cytotoxic edema in the pons and cerebral spheres. Further reports of similar cases would contribute to a better understanding of the role of cytotoxic edema in the pathophysiology of neuro-BD and help elucidate the mechanisms underlying a unique presentation characterized by a central cytotoxic edema core within vasogenic edema. (233 words).
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Affiliation(s)
- Shohei Yamashita
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Daiki Fujimori
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Shigemoto Igari
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Yusuke Yamamoto
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Takahiro Mizuuchi
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Hiroaki Mori
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Haeru Hayashi
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Koichiro Tahara
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
| | - Tetsuji Sawada
- Department of Rheumatology, Tokyo Medical University Hospital, Shinjuku, Tokyo, Japan
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3
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Yang L, Qin Y, Chen K, Xu C, Peng M, Tan S, Liu T, Yao D. The role of basal ganglia network in neural plasticity in neuromyelitis optica spectrum disorder with myelitis. Mult Scler Relat Disord 2022; 68:104170. [PMID: 36113277 DOI: 10.1016/j.msard.2022.104170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/02/2022] [Accepted: 09/08/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To explore the alternation of the brain baseline activity in neuromyelitis optica spectrum disorder (NMOSD) patients after myelitis, and characterize the representation of the neural plasticity process. METHODS Clinical evaluation and resting-state fMRI were obtained from 20 NMOSD patients with myelitis and 20 healthy controls, matched in gender and age. Resting-state networks (RSNs) were identified through independent component analysis (ICA), and functional connectivity (FC) intra-RSNs and between region-of-interest (ROI) seed to whole-brain voxels were analyzed. Between-group comparisons and correlations with motor performance were also assessed. RESULTS A total of 14 main functional RSNs were identified. Group comparison of intra-network FCs revealed that FC strengths increased in basal ganglia network (BGN) and left frontoparietal network, decreased in sensorimotor network and default mode network in NMOSD. Better motor performance was found closely correlated with higher FC of BGN. Additionally, remarkably increased FC between caudate in BGN with cerebellum, frontal lobe and parietal lobe was discovered in further ROI-based whole-brain voxels FC analysis. CONCLUSIONS NMOSD patients presented wide brain resting-state functional connectivity alterations after myelitis, and BGN might be highly active in the process of neural plasticity in chronic stage of NMOSD. Besides, understanding neural plasticity representation, especially that in NMOSD patients after myelitis, might have important applications in monitoring and designing rehabilitative approaches.
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Affiliation(s)
- Lili Yang
- Department of Neurology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, 32 West Second Section of First Ring Road, Chengdu 611731, China
| | - Yun Qin
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., West Hi-Tech Zone, Chengdu, Sichuan 611731, China
| | - Kai Chen
- Department of Neurology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, 32 West Second Section of First Ring Road, Chengdu 611731, China
| | - Congyu Xu
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., West Hi-Tech Zone, Chengdu, Sichuan 611731, China
| | - Maoqing Peng
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., West Hi-Tech Zone, Chengdu, Sichuan 611731, China
| | - Song Tan
- Department of Neurology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, 32 West Second Section of First Ring Road, Chengdu 611731, China.
| | - Tiejun Liu
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., West Hi-Tech Zone, Chengdu, Sichuan 611731, China.
| | - Dezhong Yao
- Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., West Hi-Tech Zone, Chengdu, Sichuan 611731, China.
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4
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Kim M, Choi KS, Hyun RC, Hwang I, Yun TJ, Kim SM, Kim JH. Free-water diffusion tensor imaging detects occult periependymal abnormality in the AQP4-IgG-seropositive neuromyelitis optica spectrum disorder. Sci Rep 2022; 12:512. [PMID: 35017589 PMCID: PMC8752776 DOI: 10.1038/s41598-021-04490-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 12/22/2021] [Indexed: 11/23/2022] Open
Abstract
To compare free-water corrected diffusion tensor imaging (DTI) measures in the normal-appearing periependymal area between AQP4-IgG-seropositive NMOSD and multiple sclerosis (MS) to investigate occult pathophysiology.
This prospective study included 44 patients (mean age, 39.52 ± 11.90 years; 14 men) with AQP4-IgG-seropositive NMOSD (n = 20) and MS (n = 24) who underwent DTI between April 2014 and April 2020. Based on free-water corrected DTI measures obtained from normal-appearing periependymal voxels of (1) lateral ventricles and (2) the 3rd and 4th ventricles as dependent variables, MANCOVA was conducted to compare the two groups, using clinical variables as covariates. A significant difference was found between AQP4-IgG-seropositive NMOSD and MS in the 3rd and 4th periependymal voxels (λ = 0.462, P = 0.001). Fractional anisotropy, axial diffusivity was significantly decreased and radial diffusivity was increased in AQP4-IgG-seropositive NMOSD in post-hoc analysis, compared with MS (F = 27.616, P < 0.001, F = 7.336, P = 0.011, and F = 5.800, P = 0.022, respectively). Free-water corrected DTI measures differ in the periependymal area surrounding the diencephalon and brain stem/cerebellum between MS and NMOSD, which may suggest occult white matter injury in areas with distribution of AQP-4 in NMOSD.
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Affiliation(s)
- Minchul Kim
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyu Sung Choi
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ryoo Chang Hyun
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Inpyeong Hwang
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Jin Yun
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sung Min Kim
- Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Ji-Hoon Kim
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
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5
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Martin P, Hagberg GE, Schultz T, Harzer K, Klose U, Bender B, Nägele T, Scheffler K, Krägeloh-Mann I, Groeschel S. T2-Pseudonormalization and Microstructural Characterization in Advanced Stages of Late-infantile Metachromatic Leukodystrophy. Clin Neuroradiol 2021; 31:969-980. [PMID: 33226437 PMCID: PMC8648649 DOI: 10.1007/s00062-020-00975-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/27/2020] [Indexed: 11/24/2022]
Abstract
PURPOSE T2-weighted signal hyperintensities in white matter (WM) are a diagnostic finding in brain magnetic resonance imaging (MRI) of patients with metachromatic leukodystrophy (MLD). In our systematic investigation of the evolution of T2-hyperintensities in patients with the late-infantile form, we describe and characterize T2-pseudonormalization in the advanced stage of the natural disease course. METHODS The volume of T2-hyperintensities was quantified in 34 MRIs of 27 children with late-infantile MLD (median age 2.25 years, range 0.5-5.2 years). In three children with the most advanced clinical course (age >4 years) and for whom the T2-pseudonormalization was the most pronounced, WM microstructure was investigated using a multimodal MRI protocol, including diffusion-weighted imaging, MR spectroscopy (MRS), myelin water fraction (MWF), magnetization transfer ratio (MTR), T1-mapping and quantitative susceptibility mapping. RESULTS T2-hyperintensities in cerebral WM returned to normal in large areas of 3 patients in the advanced disease stage. Multimodal assessment of WM microstructure in areas with T2-pseudonormalization revealed highly decreased values for NAA, neurite density, isotropic water, mean and radial kurtosis, MWF and MTR, as well as increased radial diffusivity. CONCLUSION In late-infantile MLD patients, we found T2-pseudonormalization in WM tissue with highly abnormal microstructure characterizing the most advanced disease stage. Pathological hallmarks might be a loss of myelin, but also neuronal loss as well as increased tissue density due to gliosis and accumulated storage material. These results suggest that a multimodal MRI protocol using more specific microstructural parameters than T2-weighted sequences should be used when evaluating the effect of treatment trials in MLD.
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Affiliation(s)
- Pascal Martin
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
| | - Gisela E Hagberg
- High Field Magnetic Resonance, Max-Planck Institute for Biological Cybernetics, Tübingen, Germany
- Biomedical Magnetic Resonance, University Hospital, Tübingen, Germany
| | - Thomas Schultz
- B-IT and Institute of Computer Science, University of Bonn, Bonn, Germany
| | - Klaus Harzer
- Department of Neuropediatrics, University Children's Hospital, Tübingen, Germany
| | - Uwe Klose
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Tübingen, Tübingen, Germany
| | - Benjamin Bender
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Tübingen, Tübingen, Germany
| | - Thomas Nägele
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Tübingen, Tübingen, Germany
| | - Klaus Scheffler
- High Field Magnetic Resonance, Max-Planck Institute for Biological Cybernetics, Tübingen, Germany
- Biomedical Magnetic Resonance, University Hospital, Tübingen, Germany
| | | | - Samuel Groeschel
- Department of Neuropediatrics, University Children's Hospital, Tübingen, Germany
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Clinical applications of diffusion-weighted sequence in brain imaging: beyond stroke. Neuroradiology 2021; 64:15-30. [PMID: 34596716 PMCID: PMC8484843 DOI: 10.1007/s00234-021-02819-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/10/2021] [Indexed: 11/20/2022]
Abstract
Diffusion-weighted imaging (DWI) is a well-established MRI sequence for diagnosing early stroke and provides therapeutic implications. However, DWI yields pertinent information in various other brain pathologies and helps establish a specific diagnosis and management of other central nervous system disorders. Some of these conditions can present with acute changes in neurological status and mimic stroke. This review will focus briefly on diffusion imaging techniques, followed by a more comprehensive description of the utility of DWI in common neurological entities beyond stroke.
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Microstructural white matter alterations in Alzheimer's disease and amnestic mild cognitive impairment and its diagnostic value based on diffusion kurtosis imaging: a tract-based spatial statistics study. Brain Imaging Behav 2021; 16:31-42. [PMID: 33895943 DOI: 10.1007/s11682-021-00474-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2021] [Indexed: 10/21/2022]
Abstract
This prospective study aimed to explore the white matter microstructural alterations in Alzheimer's disease (AD) and amnestic mild cognitive impairment (aMCI) using the Tract-based Spatial Statistics (TBSS) method of diffusion kurtosis imaging (DKI).Diffusion images were collected from 45 AD patients, 42 aMCI patients, and 35 healthy controls (HC). The differences of DKI-derived parameters, including kurtosis fractional anisotropy (KFA), mean kurtosis (MK), fractional anisotropy (FA), and mean diffusivity (MD), were compared across the three groups using the TBSS method. Correlation between the altered DKI-derived parameters and the Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) scores were analyzed. A receiver operating characteristic curve (ROC) was used to evaluate the diagnostic performance of different white matter parameters with the strongest correlations. As a result, compared with the HC group, KFA values decreased significantly in the aMCI group. Compared with both the HC and aMCI groups, the FA, KFA, and MK values decreased significantly and the MD value increased significantly in the AD group. FA, MD, KFA, and MK values of many white matter fiber tracts were significantly correlated with MMSE and MoCA scores. The area under the ROC curve (AUC) for the splenium of corpus callosum KFA values were highest for the diagnosis of aMCI and AD patients. In conclusion, the compactness and complexity of white matter microstructures were reduced in AD and aMCI patients. DKI can provide information about the severity of AD progression, and KFA might be more sensitive for the detection of white matter microstructural alterations.
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8
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Damen FC, Scotti A, Damen FW, Saran N, Valyi-Nagy T, Vukelich M, Cai K. Multimodal apparent diffusion (MAD) weighted magnetic resonance imaging. Magn Reson Imaging 2020; 77:213-233. [PMID: 33309925 DOI: 10.1016/j.mri.2020.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 11/17/2020] [Accepted: 12/08/2020] [Indexed: 10/22/2022]
Affiliation(s)
- Frederick C Damen
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.
| | - Alessandro Scotti
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.
| | - Frederick W Damen
- Department of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.
| | - Nitu Saran
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.
| | - Tibor Valyi-Nagy
- Department of Pathology, University of Illinois at Chicago, Chicago, IL, USA.
| | - Mirko Vukelich
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.
| | - Kejia Cai
- Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA.
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Zacharzewska-Gondek A, Pokryszko-Dragan A, Budrewicz S, Sąsiadek M, Trybek G, Bladowska J. The role of ADC values within the normal-appearing brain in the prognosis of multiple sclerosis activity during interferon-β therapy in the 3-year follow-up: a preliminary report. Sci Rep 2020; 10:12828. [PMID: 32732968 PMCID: PMC7393067 DOI: 10.1038/s41598-020-69383-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 07/03/2020] [Indexed: 11/17/2022] Open
Abstract
Predictors of multiple sclerosis (MS) activity during disease-modifying treatment are being extensively investigated. The aim of this study was to assess the prognosis of NEDA (no evidence of disease activity) status during IFN-β (interferon-β) treatment, using apparent diffusion coefficient (ADC) measurements obtained at initial MRI (magnetic resonance imaging). In 87 MS patients treated with IFN-β, ADC values were calculated for 13 regions of normal-appearing white and grey matter (NAWM, NAGM) based on MRI performed with a 1.5 T magnet before (MS0, n = 45) or after one year of therapy (MS1, n = 42). Associations were evaluated between ADC, conventional MRI findings, demographic and clinical factors and NEDA status within the following 3 years using logistic, Cox and multinomial logistic regression models. NEDA rates in the MS0 group were 64.4%, 46.5% and 33.3% after the 1st, 2nd and 3rd year of treatment, respectively and in MS1 patients 71.4% and 48.7% for the periods 1st–2nd and 1st–3rd years of treatment, respectively. ADC values in the NAWM regions contributed to loss of NEDA and its clinical and radiological components, with a 1–3% increase in the risk of NEDA loss (p = 0.0001–0.0489) in both groups. ADC measurements may have an additional prognostic value with regard to NEDA status.
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Affiliation(s)
- Anna Zacharzewska-Gondek
- Department of General and Interventional Radiology and Neuroradiology, Wroclaw Medical University, 213 Borowska Street, 50-556, Wroclaw, Poland.
| | - Anna Pokryszko-Dragan
- Department and Clinic of Neurology, Wroclaw Medical University, 213 Borowska Street, 50-556, Wroclaw, Poland
| | - Sławomir Budrewicz
- Department and Clinic of Neurology, Wroclaw Medical University, 213 Borowska Street, 50-556, Wroclaw, Poland
| | - Marek Sąsiadek
- Department of General and Interventional Radiology and Neuroradiology, Wroclaw Medical University, 213 Borowska Street, 50-556, Wroclaw, Poland
| | - Grzegorz Trybek
- Department of Oral Surgery, Pomeranian Medical University, 72 Powstańców Wielkopolskich Street, 70-111, Szczecin, Poland
| | - Joanna Bladowska
- Department of General and Interventional Radiology and Neuroradiology, Wroclaw Medical University, 213 Borowska Street, 50-556, Wroclaw, Poland
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Mallon D, Dixon L, Campion T, Dawe G, Bhatia K, Kachramanoglou C, Kirmi O. Beyond the brain: Extra-axial pathology on diffusion weighted imaging in neuroimaging. J Neurol Sci 2020; 415:116900. [PMID: 32464349 DOI: 10.1016/j.jns.2020.116900] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/30/2020] [Accepted: 05/09/2020] [Indexed: 01/10/2023]
Abstract
Diffusion-weighted imaging (DWI) has a central role in the assessment of the brain parenchyma, particularly in the context of acute stroke. However, the applications of DWI extend far beyond the brain parenchyma and include the assessment of the extra-axial structures of the head and neck that are included in routine brain imaging. In this pictorial review, the added-value of DWI over other conventional sequences is illustrated through discussion of a broad range of disorders affecting the vasculature, skull, orbits, nasal cavity and salivary glands. This article highlights the requirement for all structures, both intra- and extra-axial, to be carefully reviewed on DWI.
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Affiliation(s)
- Dermot Mallon
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK.
| | - Luke Dixon
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
| | - Tom Campion
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
| | - Gemma Dawe
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
| | - Kunwar Bhatia
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
| | - Carolina Kachramanoglou
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
| | - Olga Kirmi
- Imperial College Healthcare NHS Trust, Department of Imaging, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
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11
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Liu Y, Xiong H, Li X, Zhang D, Yang C, Yu J, Liao R, Zhou B, Huang X, Tang Z. Abnormal Baseline Brain Activity in Neuromyelitis Optica Patients Without Brain Lesion Detected by Resting-State Functional Magnetic Resonance Imaging. Neuropsychiatr Dis Treat 2020; 16:71-79. [PMID: 32021200 PMCID: PMC6955618 DOI: 10.2147/ndt.s232924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/23/2019] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE To investigate the baseline brain activity in neuromyelitis optica patients without brain lesion using the regional amplitude of low-frequency fluctuation (ALFF) and fractional amplitude of low-frequency fluctuation (fALFF) as indexes. MATERIALS AND METHODS Forty-two patients of NMO with normal performance in conventional MRI and 42 healthy controls, matched in gender and age, were enrolled in this study. Resting-state functional magnetic resonance imaging (rs-fMRI) data acquired using the rs-fMRI Data Analysis Toolkit. The relationships between expanded disability states scale (EDSS) scores, abnormal baseline brain activity and disease duration were explored. RESULTS The left inferior temporal, left cerebellum_4_5, bilateral superior temporal pole, left caudate, right superior temporal, left middle frontal and left superior occipital showed significantly increased ALFF in the NMO. Regions of abnormal fALFF were similar to those of ALFF except that increased fALFF were also indicated in the right cerebellum crus2, right hippocampus, left parahippocampal gyrus and left supplementary motor area. Furthermore, a significant correlation between EDSS scores and ALFF/fALFF was noted in the left inferior temporal gyrus. CONCLUSION Results confirmed the disturbances in NMO-related neural networks, which probably be related to spinal cord damage.
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Affiliation(s)
- Yi Liu
- Department of Radiology, Peking University First Hospital, Beijing 100034, People's Republic of China
| | - Hua Xiong
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Xiaojiao Li
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Dan Zhang
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Chao Yang
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Jiayi Yu
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Ruikun Liao
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Bi Zhou
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Xianlong Huang
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
| | - Zhuoyue Tang
- Department of Radiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China.,Molecular and Functional Imaging Laboratory, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400014, People's Republic of China
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12
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Abstract
MRI is a commonly used diagnostic tool in neurology, and all neurologists should possess a working knowledge of imaging fundamentals. An overview of current and impending MRI techniques is presented to help the referring clinician communicate better with the imaging department, understand the utility and limitations of current and emerging technology, improve specificity and appropriateness when ordering MRI studies, and recognize key findings.
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Affiliation(s)
- Nandor K Pinter
- Dent Neurologic Institute, 3980A Sheridan Drive, Suite 101, Amherst, NY 14226, USA; Department of Neurosurgery, State University of New York at Buffalo, Buffalo, NY, USA
| | - Joseph V Fritz
- Dent Neurologic Institute, 3980 Sheridan Drive, Suite 501, Amherst, NY 14226, USA; NeuroNetPro, Amherst, NY, USA.
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Holdsworth SJ, O'Halloran R, Setsompop K. The quest for high spatial resolution diffusion-weighted imaging of the human brain in vivo. NMR IN BIOMEDICINE 2019; 32:e4056. [PMID: 30730591 DOI: 10.1002/nbm.4056] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 09/11/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Diffusion-weighted imaging, a contrast unique to MRI, is used for assessment of tissue microstructure in vivo. However, this exquisite sensitivity to finer scales far above imaging resolution comes at the cost of vulnerability to errors caused by sources of motion other than diffusion motion. Addressing the issue of motion has traditionally limited diffusion-weighted imaging to a few acquisition techniques and, as a consequence, to poorer spatial resolution than other MRI applications. Advances in MRI imaging methodology have allowed diffusion-weighted MRI to push to ever higher spatial resolution. In this review we focus on the pulse sequences and associated techniques under development that have pushed the limits of image quality and spatial resolution in diffusion-weighted MRI.
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Affiliation(s)
- Samantha J Holdsworth
- Department of Anatomy Medical Imaging & Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | | | - Kawin Setsompop
- Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
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Zacharzewska-Gondek A, Pokryszko-Dragan A, Gondek TM, Kołtowska A, Gruszka E, Budrewicz S, Sąsiadek M, Bladowska J. Apparent diffusion coefficient measurements in normal appearing white matter may support the differential diagnosis between multiple sclerosis lesions and other white matter hyperintensities. J Neurol Sci 2019; 397:24-30. [DOI: 10.1016/j.jns.2018.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/30/2018] [Accepted: 12/13/2018] [Indexed: 10/27/2022]
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15
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Arashloo FT, Hanzaei FF, Sedighi B, Amjad G, Younesi L. Efficacy of diffusion-weighted imaging in symptomatic and asymptomatic multiple sclerotic plaques. J Family Med Prim Care 2019; 8:2409-2413. [PMID: 31463267 PMCID: PMC6691452 DOI: 10.4103/jfmpc.jfmpc_420_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Introduction: Magnetic resonance imaging (MRI) currently accompanies clinical findings in disease diagnosis, patients’ follow-up, assessment of drugs complications, and evaluation of treatment response. Although contrast-enhanced MRI (CE-MRI) is considered as the imaging modality of choice for multiple sclerosis (MS), due to disease chronicity, applying multiple doses of gadolinium-based contrast agents (GBCAs) increases the risk of nephrogenic syndrome in patients with acute (ARF) and chronic renal syndromes (CRF). Moreover, the effect of gadolinium on the fetus is not well-known in pregnant patients. Therefore, this study evaluates the possibility of replacing postcontrast images with physiologically based MRI sequences such as diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC). Method: We prospectively evaluated 26 patients with known multiple sclerosis. The patients with MS attacks and the asymptomatic patients who were referred for follow-up were enrolled. Conventional MRI including postcontrast T1W, DWI, and ADC were performed for all patients. The signal intensity (SI) of all enhancing and nonenhancing plaques of more than 10 × 10 mm size were investigated in all sequences and analyzed. Results: A total of 83 plaques were detected in T2-FLAIR sequences of which 51 plaques were enhanced (68%) after gadolinium administration. While 42 MS plaques had hypersignal intensity in DWI (56%), 32 plaques had iso- or hyposignal intensities in DWI (44%). No statistically significant values were obtained. Conclusion: Although DWI could not replace CE-MRI, using these two modalities together could increase detection of active MS plaques and alter patients’ therapy and prognosis.
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Affiliation(s)
| | - Farnaz Fahimi Hanzaei
- Clinical Research Unit, Afzalipour Hospital, Kerman University of Medical Sciences, Kerman, Iran
| | - Behnaz Sedighi
- Neurology Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Ghazaleh Amjad
- Shahid Akbar Abadi Clinical Research Development Unit, Iran University of Medical Sciences, Tehran, Iran
| | - Ladan Younesi
- Shahid Akbar Abadi Clinical Research Development Unit, Iran University of Medical Sciences, Tehran, Iran
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Carney O, Falzon A, MacKinnon A. Diffusion-weighted MRI in paediatric neuroimaging. Clin Radiol 2018; 73:999-1013. [DOI: 10.1016/j.crad.2018.07.101] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 07/10/2018] [Indexed: 12/11/2022]
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Cheng JX, Zhang HY, Peng ZK, Xu Y, Tang H, Wu JT, Xu J. Divergent topological networks in Alzheimer's disease: a diffusion kurtosis imaging analysis. Transl Neurodegener 2018; 7:10. [PMID: 29719719 PMCID: PMC5921324 DOI: 10.1186/s40035-018-0115-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/10/2018] [Indexed: 02/06/2023] Open
Abstract
Background Brain consists of plenty of complicated cytoarchitecture. Gaussian-model based diffusion tensor imaging (DTI) is far from satisfactory interpretation of the structural complexity. Diffusion kurtosis imaging (DKI) is a tool to determine brain non-Gaussian diffusion properties. We investigated the network properties of DKI parameters in the whole brain using graph theory and further detected the alterations of the DKI networks in Alzheimer’s disease (AD). Methods Magnetic resonance DKI scanning was performed on 21 AD patients and 19 controls. Brain networks were constructed by the correlation matrices of 90 regions and analyzed through graph theoretical approaches. Results We found small world characteristics of DKI networks not only in the normal subjects but also in the AD patients; Grey matter networks of AD patients tended to be a less optimized network. Moreover, the divergent small world network features were shown in the AD white matter networks, which demonstrated increased shortest paths and decreased global efficiency with fiber tractography but decreased shortest paths and increased global efficiency with other DKI metrics. In addition, AD patients showed reduced nodal centrality predominantly in the default mode network areas. Finally, the DKI networks were more closely associated with cognitive impairment than the DTI networks. Conclusions Our results suggest that DKI might be superior to DTI and could serve as a novel approach to understand the pathogenic mechanisms in neurodegenerative diseases.
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Affiliation(s)
- Jia-Xing Cheng
- Department of Neurology, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Hong-Ying Zhang
- Department of Radiology, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Zheng-Kun Peng
- Department of Radiology, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Yao Xu
- Department of Neurology, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Hui Tang
- Medical Experimental Center, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Jing-Tao Wu
- Department of Radiology, Northern Jiangsu People's Hospital, Yangzhou University, Yangzhou, 225001 China
| | - Jun Xu
- 4Department of Neurology, Beijing TianTan Hospital, Capital Medical University, Beijing, 100050 China.,5Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, School of Medicine, Yangzhou University, Yangzhou, 225001 Jiangsu China
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18
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Wu X, Liao X, Zhan Y, Cheng C, Shen W, Huang M, Zhou Z, Wang Z, Qiu Z, Xing W, Liao W, Tang B, Shen L. Microstructural Alterations in Asymptomatic and Symptomatic Patients with Spinocerebellar Ataxia Type 3: A Tract-Based Spatial Statistics Study. Front Neurol 2017; 8:714. [PMID: 29312133 PMCID: PMC5744430 DOI: 10.3389/fneur.2017.00714] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022] Open
Abstract
Objective Spinocerebellar ataxia type 3 (SCA3) is the most commonly occurring type of autosomal dominant spinocerebellar ataxia. The present study aims to investigate progressive changes in white matter (WM) fiber in asymptomatic and symptomatic patients with SCA3. Methods A total of 62 participants were included in this study. Among them, 16 were asymptomatic mutation carriers (pre-SCA3), 22 were SCA3 patients with clinical symptoms, and 24 were normal controls (NC). Group comparison of tract-based spatial statistics was performed to identify microstructural abnormalities at different SCA3 disease stages. Results Decreased fractional anisotropy (FA) and increased mean diffusivity (MD) were found in the left inferior cerebellar peduncle and superior cerebellar peduncle (SCP) in the pre-SCA3 group compared with NC. The symptomatic SCA3 group showed brain-wide WM tracts impairment in both supratentorial and infratentorial networks, and the mean FA value of the WM skeleton showed a significantly negative correlation with the International Cooperative Ataxia Rating Scale (ICARS) scores. Specifically, FA of the bilateral posterior limb of the internal capsule negatively correlated with SCA3 disease duration. We also found that FA values in the right medial lemniscus and SCP negatively correlated with ICARS scores, whereas FA in the right posterior thalamic radiation positively correlated with Montreal Cognitive Assessment scores. In addition, MD in the middle cerebellar peduncle, left anterior limb of internal capsule, external capsule, and superior corona radiate positively correlated with ICARS scores in SCA3 patients. Conclusion WM microstructural changes are present even in the asymptomatic stages of SCA3. In individuals in which the disease has progressed to the symptomatic stage, the integrity of WM fibers across the whole brain is affected. Furthermore, abnormalities in WM tracts are closely related to SCA3 disease severity, including movement disorder and cognitive dysfunction. These findings can deepen our understanding of the neural basis of SCA3 dysfunction.
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Affiliation(s)
- Xinwei Wu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Xinxin Liao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Yafeng Zhan
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Cheng Cheng
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Wei Shen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Mufang Huang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhifan Zhou
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Zheng Wang
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Zilong Qiu
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
| | - Wu Xing
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Weihua Liao
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Beisha Tang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, China.,State Key Laboratory of Medical Genetics, Changsha, China.,National Clinical Research Center for Geriatric Disease, Changsha, China.,Parkinson's Disease Center of Beijing Institute for Brain Disorders, Beijing, China.,Collaboration Innovation Center for Brain Science, Shanghai, China.,Collaboration Innovation Center for Genetics and Development, Changsha, China
| | - Lu Shen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, China.,State Key Laboratory of Medical Genetics, Changsha, China.,National Clinical Research Center for Geriatric Disease, Changsha, China
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19
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Lin TH, Chiang CW, Perez-Torres CJ, Sun P, Wallendorf M, Schmidt RE, Cross AH, Song SK. Diffusion MRI quantifies early axonal loss in the presence of nerve swelling. J Neuroinflammation 2017; 14:78. [PMID: 28388913 PMCID: PMC5384143 DOI: 10.1186/s12974-017-0852-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/26/2017] [Indexed: 11/10/2022] Open
Abstract
Background Magnetic resonance imaging markers have been widely used to detect and quantify white matter pathologies in multiple sclerosis. We have recently developed a diffusion basis spectrum imaging (DBSI) to distinguish and quantify co-existing axonal injury, demyelination, and inflammation in multiple sclerosis patients and animal models. It could serve as a longitudinal marker for axonal loss, a primary cause of permanent neurological impairments and disease progression. Methods Eight 10-week-old female C57BL/6 mice underwent optic nerve DBSI, followed by a week-long recuperation prior to active immunization for experimental autoimmune encephalomyelitis (EAE). Visual acuity of all mice was assessed daily. Longitudinal DBSI was performed in mouse optic nerves at baseline (naïve, before immunization), before, during, and after the onset of optic neuritis. Tissues were perfusion fixed after final in vivo scans. The correlation between DBSI detected pathologies and corresponding immunohistochemistry markers was quantitatively assessed. Results In this cohort of EAE mice, monocular vision impairment occurred in all animals. In vivo DBSI detected, differentiated, and quantified optic nerve inflammation, demyelination, and axonal injury/loss, correlating nerve pathologies with visual acuity at different time points of acute optic neuritis. DBSI quantified, in the presence of optic nerve swelling, ~15% axonal loss at the onset of optic neuritis in EAE mice. Conclusions Our findings support the notion that axonal loss could occur early in EAE mice. DBSI detected pathologies in the posterior visual pathway unreachable by optical coherence tomography and without confounding inflammation induced optic nerve swelling. DBSI could thus decipher the interrelationship among various pathological components and the role each plays in disease progression. Quantification of the rate of axonal loss could potentially serve as the biomarker to predict treatment outcome and to determine when progressive disease starts.
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Affiliation(s)
- Tsen-Hsuan Lin
- Radiology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA
| | - Chia-Wen Chiang
- Radiology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA.,Current Address: Institute of Biomedical Engineering and Nanomedicine, National Health Research Institute, 35 Keyan Road, Zhunan, Miaoli County, 35053, Taiwan
| | - Carlos J Perez-Torres
- Radiology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA.,Current Address: School of Health Sciences, Purdue University, 550 W Stadium Ave, West Lafayette, IN, 47907, USA
| | - Peng Sun
- Radiology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA
| | - Michael Wallendorf
- Biostatistics, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA
| | - Robert E Schmidt
- Pathology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA
| | - Anne H Cross
- Neurology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA.,Hope Center for Neurological Disorders, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA
| | - Sheng-Kwei Song
- Radiology, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA. .,Hope Center for Neurological Disorders, Washington University School of Medicine, 660 S Euclid Ave, St. Louis, MO, 63110, USA. .,Biomedical Engineering, Washington University, 1 Brookings Dr, St. Louis, MO, 63130, USA. .,Biomedical MR Laboratory, Washington University School of Medicine, Campus Box 8227, Room 2313, 4525 Scott Ave, St Louis, MO, 63110, USA.
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20
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Benjamin P, Khan F, MacKinnon AD. The use of diffusion weighted imaging to evaluate pathology outside the brain parenchyma in neuroimaging studies. Br J Radiol 2017; 90:20160821. [PMID: 28195506 DOI: 10.1259/bjr.20160821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Diffusion-weighted imaging (DWI) has transformed the radiological assessment of a variety of cerebral pathologies, in particular acute stroke. In neuroimaging studies, DWI can also be used to evaluate pathology outside the brain parenchyma, although it is sometimes underutilized for this purpose. In this pictorial review, the principles of DWI are outlined, and 13 cases of abnormal diffusion outside the brain parenchyma are illustrated in order to show DWI as a useful sequence for the evaluation of the following recommended review areas: the dural venous sinuses, internal carotid arteries, meninges, ventricles, cavernous sinus and orbits, skull base and lymph nodes.
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Affiliation(s)
- Philip Benjamin
- 1 Neurosciences Research Centre, Cardiovascular and Cell Sciences Research Institute, St George's University of London, London, UK
| | - Faraan Khan
- 2 Atkinson Morley Regional Neuroscience Centre, St George's University Hospitals NHS Foundation Trust, London, UK
| | - Andrew D MacKinnon
- 2 Atkinson Morley Regional Neuroscience Centre, St George's University Hospitals NHS Foundation Trust, London, UK
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21
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Chinnadurai V, Sreedhar CM, Khushu S. Assessment of cochlear nerve deficiency and its effect on normal maturation of auditory tract by diffusion kurtosis imaging and diffusion tensor imaging: A correlational approach. Magn Reson Imaging 2016; 34:1305-1313. [PMID: 27476097 DOI: 10.1016/j.mri.2016.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 06/27/2016] [Accepted: 07/18/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVE The use of diffusion kurtosis imaging (DKI) and diffusion tensor imaging (DTI) was evaluated in assessing cochlear nerve deficiency (CND) and its effect on normal maturation of auditory tract. METHODS 25 CND patients and 25 controls (age matched: 2months to 17years, gender matched) were evaluated by mean kurtosis (MK), axial kurtosis, and radial kurtosis and compared against fractional anisotropy (FA), axial and radial diffusivities in internal auditory canal (IAC), lateral lemniscus (LL) and inferior colliculus (IC). The age related changes of auditory tract were studied through Pearson correlation between estimated indices and age of both CND and control populations. RESULTS Significant loss of MK (IAC: 10.71%, IC: 10.87%, LL: 15.63%) was observed in CND cases as against moderate reduction in FA (IAC: 8.57%, IC: 10%, LL: 7.69%) in all three anatomical locations. Similarly, substantial decline is observed in radial kurtosis (IAC: 27.03%, IC: 33.33%, LL: 31.43%) in comparison to moderate increase in radial diffusivity (IAC: 13.46%, IC: 24.39%, LL: 24%) in CND cases. No statistically significant change was seen in both axial kurtosis and diffusivities. In control populations, MK (r=0.473, p=0.011) and radial kurtosis (r=0.418, p=0.016) correlate positively with age and had no correlation in case of CND cases. FA (r=0.356, p=0.019) minimally correlated with age in control population but showed no statistically significant correlation in CND cases (r=0.198, p=0.036). CONCLUSION DKI metrics performed better than DTI in assessing microstructural changes of CND. In particular, MK and radial kurtosis are found to be more sensitive enough to differentiate the normal maturation of cochlear nerve from CND cases.
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Affiliation(s)
| | - C M Sreedhar
- Department of Radiology, Army Hospital (Research & Referral), New Delhi, India
| | - Subash Khushu
- NMR Lab, Institute of Nuclear Medicine and Allied Sciences, New Delhi, India
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Davoudi Y, Foroughipour M, Torabi R, Layegh P, Matin N, Shoeibi A. Diffusion Weighted Imaging in Acute Attacks of Multiple Sclerosis. IRANIAN JOURNAL OF RADIOLOGY 2016; 13:e21740. [PMID: 27679697 PMCID: PMC5035938 DOI: 10.5812/iranjradiol.21740] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 10/04/2014] [Accepted: 10/07/2014] [Indexed: 11/21/2022]
Abstract
Background Multiple sclerosis (MS) is one of the most common autoimmune disorders of the central nervous system. In spite of various imaging modalities, the definitive diagnosis of MS remains challenging. Objectives This study was designed to evaluate the usefulness of diffusion weighted imaging (DWI) in the diagnosis of acute MS attack and to compare its results with contrast enhanced MRI (CE-MRI). Patients and Methods In this cross sectional study, seventy patients with definite diagnosis of relapsing-remitting MS were included. CE-MRI using 0.1 mmol/kg gadolinium as well as DWI sequences were performed for all patients. The percentage of patients with positive DWI was compared with the results of CE-MRI and the consistency between the two imaging modalities was evaluated. Moreover, the relationship between the time of onset of patient’s symptoms and test results for both methods were investigated. Results CE-MRI yielded positive results for 61 (87%) patients and DWI yielded positive for 53 (76%) patients. In fifty patients (71.42%), both tests were positive and in six cases (8.57%), both were negative. The test results of three patients turned out to be positive in DWI, while they tested negative in CE-MRI. There was no significant relationship between the results of CE-MRI as well as DWI and the time of imaging from the onset of symptoms. Conclusion These data indicate that while CE-MRI will depict more positive results, there are cases in which DWI will show a positive result while CE-MRI is negative. We suggest that the combination of these two imaging modalities might yield more positive results in diagnosing acute MS attack giving rise to a more accurate diagnosis.
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Affiliation(s)
- Yasmin Davoudi
- Department of Radiology, Imam Reza Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohsen Foroughipour
- Department of Neurology, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reza Torabi
- Department of Radiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Parvaneh Layegh
- Department of Radiology, Imam Reza Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nassim Matin
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Shoeibi
- Department of Neurology, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Corresponding author: Ali Shoeibi, Department of Neurology, Ghaem Hospital, School of Medicine, Mashhad University of Medical Sciences, P. O. Box: 9197969764, Mashhad, Iran. Tel: +98-9155137344, Fax: +98-5138429828, E-mail:
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Abakumova TO, Nukolova NV, Gusev EI, Chekhonin VP. [Contrast agents in MRI-diagnosis of multiple sclerosis]. Zh Nevrol Psikhiatr Im S S Korsakova 2015; 115:58-65. [PMID: 25909791 DOI: 10.17116/jnevro20151151158-65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Magnetic resonance imaging using contrast agents plays an important role in diagnosis and assessment of treatment efficacy in multiple sclerosis. The development of contrast agents on the basis of gadolinium or iron oxide nanoparticles has potential for diagnosis of pathological foci (tumors, amyloid plaques, inflammation and foci of demyelination or necrosis) in nervous system diseases. Newly developing types of diagnostic substances for visualization of pathological foci in multiple sclerosis are presented in this review.
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Affiliation(s)
- T O Abakumova
- Pirogov Russian National Research Medical University, Moscow
| | - N V Nukolova
- Pirogov Russian National Research Medical University, Moscow
| | - E I Gusev
- Pirogov Russian National Research Medical University, Moscow
| | - V P Chekhonin
- Pirogov Russian National Research Medical University, Moscow
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24
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Doring TM, Lopes FCR, Kubo TTA, Tukamoto G, Kimura MC, Strecker RM, Domingues RC, Gasparetto EL. Neuromyelitis optica: a diffusional kurtosis imaging study. AJNR Am J Neuroradiol 2014; 35:2287-92. [PMID: 25082817 DOI: 10.3174/ajnr.a4050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND PURPOSE Conventional MR imaging typically yields normal images of the brain or indicates lesions in areas of high aquaporin expression in patients with neuromyelitis optica. Diffusional kurtosis imaging was applied in patients with neuromyelitis optica to determine whether this technique could detect alterations in diffusion and diffusional kurtosis parameters in normal-appearing white matter and to explore the relationship between diffusional kurtosis imaging and DTI parameters. MATERIALS AND METHODS Thirteen patients with neuromyelitis optica and 13 healthy controls underwent MR imaging of the brain with conventional and diffusional kurtosis imaging sequences. Tract-based spatial statistics and region-of-interest-based analyses were conducted to identify differences between patients with neuromyelitis optica and controls through conventional DTI and diffusional kurtosis imaging parameters. The parameters were correlated to determine the potential relationship between them. RESULTS Compared with healthy controls, several diffusional kurtosis imaging and DTI parameters were altered in various fiber tracts of patients with neuromyelitis optica (P < .05). A significant decrease (P < .05) in radial kurtosis was observed in the corpus callosum and anterior corona radiata and left optic radiation. Differences (P < .1) in mean kurtosis were found in patients with neuromyelitis optica. We found a negative correlation between diffusional kurtosis imaging (radial kurtosis, axial kurtosis, mean kurtosis) and the corresponding DTI parameters (radial diffusivity, axial diffusivity, mean diffusivity). Positive correlations were found for radial kurtosis and mean kurtosis with fractional anisotropy. CONCLUSIONS This study demonstrated differences in conventional diffusion and diffusional kurtosis parameters, especially radial kurtosis, in the normal-appearing white matter of patients with neuromyelitis optica compared with healthy controls. Larger studies of patients with neuromyelitis optica should be performed to assess the potential clinical impact of these findings.
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Affiliation(s)
- T M Doring
- From the Universidade Federal Rio de Janeiro (T.M.D., F.C.R.L., G.T., E.L.G.), Rio de Janeiro, Brazil Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | - F C R Lopes
- From the Universidade Federal Rio de Janeiro (T.M.D., F.C.R.L., G.T., E.L.G.), Rio de Janeiro, Brazil Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | - T T A Kubo
- Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | - G Tukamoto
- From the Universidade Federal Rio de Janeiro (T.M.D., F.C.R.L., G.T., E.L.G.), Rio de Janeiro, Brazil Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | - M C Kimura
- Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | | | - R C Domingues
- Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
| | - E L Gasparetto
- From the Universidade Federal Rio de Janeiro (T.M.D., F.C.R.L., G.T., E.L.G.), Rio de Janeiro, Brazil Clínica de Diagnóstico Por Imagem and Multi-imagem (T.M.D., F.C.R.L., T.T.A.K., G.T., M.C.K., R.C.D., E.L.G.), Diagnósticos da América, Rio de Janeiro, Brazil
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