1
|
Babakhani B, Tabatabaei NH, Elisevich K, Sadeghbeigi N, Barzegar M, Mobarakeh NM, Eyvazi F, Khazaeipour Z, Taheri A, Nazem-Zadeh MR. A Preliminary Study of the Efficacy of Transcranial Direct Current Stimulation in Trigeminal Neuralgia. Front Hum Neurosci 2022; 16:848347. [PMID: 35308616 PMCID: PMC8931809 DOI: 10.3389/fnhum.2022.848347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/07/2022] [Indexed: 01/03/2023] Open
Abstract
The purpose of this study is to assess the efficacy of transcranial direct current stimulation (tDCS) in patients with treatment-refractory trigeminal neuralgia (TN) and examine the utility of neuroimaging methods in identifying markers of such efficacy. Six patients with classical TN refractory to maximal medical treatment, underwent tDCS (three cases inhibitory/cathodic and three cases excitatory/anodic stimulation). All patients underwent pre- and posttreatment functional magnetic resonance imaging (fMRI) during block-design tasks (i.e., Pain, Pain + tDCS, tDCS) as well as single-shell diffusion MRI (dMRI) acquisition. The precise locations of tDCS electrodes were identified by neuronavigation. Five therapeutic tDCS sessions were carried out for each patient with either anodic or cathodic applications. The Numeric Rating Scale of pain (NRS) and the Headache Disability Index (HDI) were used to score the subjective efficacy of treatment. Altered activity of regional sites was identified by fMRI and associated changes in the spinothalamocortical sensory tract (STCT) were measured by the dMRI indices of fractional anisotropy (FA) and mean diffusivity (MD). Fiber counts of the bilateral trigeminal root entry zone (REZ) were performed as an added measure of fiber loss or recovery. All patients experienced a significant reduction in pain scores with a substantial decline in HDI (P value < 0.01). Following a course of anodic tDCS, the ipsilateral caudate, globus pallidus, somatosensory cortex, and the contralateral globus pallidus showed a significantly attenuated activation whereas cathodic tDCS treatment resulted in attenuation of the thalamus and globus pallidus bilaterally, and the somatosensory cortex and anterior cingulate gyrus contralaterally. dMRI analysis identified a substantial increase (>50%) in the number of contralateral sensory fibers in the STCT with either anodic or cathodic tDCS treatment in four of the six patients. A significant reduction in FA (>40%) was observed in the ipsilateral REZ in the posttreatment phase in five of the six patients. Preliminary evidence suggests that navigated tDCS presents a promising method for alleviating the pain of TN. Different patterns of activation manifested by anodic and cathodic stimulation require further elaboration to understand their implication. Activation and attenuation of responses at various sites may provide further avenues for condition treatment.
Collapse
Affiliation(s)
- Babak Babakhani
- Brain and Spinal Cord Injury Research Centre, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Kost Elisevich
- Department of Clinical Neurosciences, Spectrum Health, College of Human Medicine, Michigan State University, Grand Rapids, MI, United States
| | | | - Mojtaba Barzegar
- National Brain Mapping Laboratory, Tehran, Iran
- Intelligent Quantitative Biomedical Imaging L.L.C, Tehran, Iran
| | - Neda Mohammadi Mobarakeh
- Medical Physics and Biomedical Engineering Department, Tehran University of Medical Sciences, Tehran, Iran
- Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Equipment Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Eyvazi
- Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Equipment Institute, Tehran University of Medical Sciences, Tehran, Iran
- Cognitive Psychology Department, Shahid Beheshti University, Tehran, Iran
| | - Zahra Khazaeipour
- Brain and Spinal Cord Injury Research Centre, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Arman Taheri
- Medical School, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad-Reza Nazem-Zadeh
- Medical Physics and Biomedical Engineering Department, Tehran University of Medical Sciences, Tehran, Iran
- Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Equipment Institute, Tehran University of Medical Sciences, Tehran, Iran
- *Correspondence: Mohammad-Reza Nazem-Zadeh,
| |
Collapse
|
2
|
St‐Jean S, Viergever MA, Leemans A. Harmonization of diffusion MRI data sets with adaptive dictionary learning. Hum Brain Mapp 2020; 41:4478-4499. [PMID: 32851729 PMCID: PMC7555079 DOI: 10.1002/hbm.25117] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/11/2020] [Accepted: 06/16/2020] [Indexed: 01/05/2023] Open
Abstract
Diffusion magnetic resonance imaging can indirectly infer the microstructure of tissues and provide metrics subject to normal variability in a population. Potentially abnormal values may yield essential information to support analysis of controls and patients cohorts, but subtle confounds could be mistaken for purely biologically driven variations amongst subjects. In this work, we propose a new harmonization algorithm based on adaptive dictionary learning to mitigate the unwanted variability caused by different scanner hardware while preserving the natural biological variability of the data. Our harmonization algorithm does not require paired training data sets, nor spatial registration or matching spatial resolution. Overcomplete dictionaries are learned iteratively from all data sets at the same time with an adaptive regularization criterion, removing variability attributable to the scanners in the process. The obtained mapping is applied directly in the native space of each subject toward a scanner-space. The method is evaluated with a public database which consists of two different protocols acquired on three different scanners. Results show that the effect size of the four studied diffusion metrics is preserved while removing variability attributable to the scanner. Experiments with alterations using a free water compartment, which is not simulated in the training data, shows that the modifications applied to the diffusion weighted images are preserved in the diffusion metrics after harmonization, while still reducing global variability at the same time. The algorithm could help multicenter studies pooling their data by removing scanner specific confounds, and increase statistical power in the process.
Collapse
Affiliation(s)
- Samuel St‐Jean
- Image Sciences InstituteUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Max A. Viergever
- Image Sciences InstituteUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Alexander Leemans
- Image Sciences InstituteUniversity Medical Center UtrechtUtrechtThe Netherlands
| |
Collapse
|
3
|
Pudas J, Björnholm L, Nikkinen J, Veijola J. Cerebellar white matter in young adults with a familial risk for psychosis. Psychiatry Res Neuroimaging 2019; 287:41-48. [PMID: 30952031 DOI: 10.1016/j.pscychresns.2019.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 11/20/2022]
Affiliation(s)
- Juho Pudas
- Department of Psychiatry, Research Unit of Clinical Neuroscience, University of Oulu, Oulu, Finland; Department of Psychiatry, Oulu University Hospital, Oulu, Finland.
| | - Lassi Björnholm
- Department of Psychiatry, Research Unit of Clinical Neuroscience, University of Oulu, Oulu, Finland; Department of Psychiatry, Oulu University Hospital, Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Finland
| | - Juha Nikkinen
- Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Finland; Department of Radiotherapy, Oulu University Hospital, Finland; Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland
| | - Juha Veijola
- Department of Psychiatry, Research Unit of Clinical Neuroscience, University of Oulu, Oulu, Finland; Department of Psychiatry, Oulu University Hospital, Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Finland
| |
Collapse
|
4
|
Maffei C, Sarubbo S, Jovicich J. Diffusion-based tractography atlas of the human acoustic radiation. Sci Rep 2019; 9:4046. [PMID: 30858451 PMCID: PMC6411970 DOI: 10.1038/s41598-019-40666-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/08/2019] [Indexed: 02/06/2023] Open
Abstract
Diffusion MRI tractography allows in-vivo characterization of white matter architecture, including the localization and description of brain fibre bundles. However, some primary bundles are still only partially reconstructed, or not reconstructed at all. The acoustic radiation (AR) represents a primary sensory pathway that has been largely omitted in many tractography studies because its location and anatomical features make it challenging to reconstruct. In this study, we investigated the effects of acquisition and tractography parameters on the AR reconstruction using publicly available Human Connectome Project data. The aims of this study are: (i) using a subgroup of subjects and a reference AR for each subject, define an optimum set of parameters for AR reconstruction, and (ii) use the optimum parameters set on the full group to build a tractography-based atlas of the AR. Starting from the same data, the use of different acquisition and tractography parameters lead to very different AR reconstructions. Optimal results in terms of topographical accuracy and correspondence to the reference were obtained for probabilistic tractography, high b-values and default tractography parameters: these parameters were used to build an AR probabilistic tractography atlas. A significant left-hemispheric lateralization was found in the AR reconstruction of the 34 subjects.
Collapse
Affiliation(s)
- Chiara Maffei
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Charlestown, USA.
- Center for Mind/Brain Sciences - CIMeC, University of Trento, Rovereto (TN), Italy.
| | - Silvio Sarubbo
- Division of Neurosurgery, Structural and Functional Connectivity Lab (SFC-LSB) Project, "S.Chiara" Hospital, Trento APSS, Italy
| | - Jorge Jovicich
- Center for Mind/Brain Sciences - CIMeC, University of Trento, Rovereto (TN), Italy
- Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy
| |
Collapse
|
5
|
Roine T, Jeurissen B, Perrone D, Aelterman J, Philips W, Sijbers J, Leemans A. Reproducibility and intercorrelation of graph theoretical measures in structural brain connectivity networks. Med Image Anal 2019; 52:56-67. [DOI: 10.1016/j.media.2018.10.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 08/12/2018] [Accepted: 10/25/2018] [Indexed: 12/20/2022]
|
6
|
Boukadi M, Marcotte K, Bedetti C, Houde JC, Desautels A, Deslauriers-Gauthier S, Chapleau M, Boré A, Descoteaux M, Brambati SM. Test-Retest Reliability of Diffusion Measures Extracted Along White Matter Language Fiber Bundles Using HARDI-Based Tractography. Front Neurosci 2019; 12:1055. [PMID: 30692910 PMCID: PMC6339903 DOI: 10.3389/fnins.2018.01055] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 12/27/2018] [Indexed: 12/13/2022] Open
Abstract
High angular resolution diffusion imaging (HARDI)-based tractography has been increasingly used in longitudinal studies on white matter macro- and micro-structural changes in the language network during language acquisition and in language impairments. However, test-retest reliability measurements are essential to ascertain that the longitudinal variations observed are not related to data processing. The aims of this study were to determine the reproducibility of the reconstruction of major white matter fiber bundles of the language network using anatomically constrained probabilistic tractography with constrained spherical deconvolution based on HARDI data, as well as to assess the test-retest reliability of diffusion measures extracted along them. Eighteen right-handed participants were scanned twice, one week apart. The arcuate, inferior longitudinal, inferior fronto-occipital, and uncinate fasciculi were reconstructed in the left and right hemispheres and the following diffusion measures were extracted along each tract: fractional anisotropy, mean, axial, and radial diffusivity, number of fiber orientations, mean length of streamlines, and volume. All fiber bundles showed good morphological overlap between the two scanning timepoints and the test-retest reliability of all diffusion measures in most fiber bundles was good to excellent. We thus propose a fairly simple, but robust, HARDI-based tractography pipeline reliable for the longitudinal study of white matter language fiber bundles, which increases its potential applicability to research on the neurobiological mechanisms supporting language.
Collapse
Affiliation(s)
- Mariem Boukadi
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada.,Département de Psychologie, Université de Montréal, Montreal, QC, Canada
| | - Karine Marcotte
- Centre de Recherche du CIUSSS du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,École d'Orthophonie et d'Audiologie, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
| | - Christophe Bedetti
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada
| | - Jean-Christophe Houde
- Sherbrooke Connectivity Imaging Lab, Département d'Informatique, Université de Sherbrooke, Montreal, QC, Canada
| | - Alex Desautels
- Centre de Recherche du CIUSSS du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada.,CIUSSS du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montreal, QC, Canada
| | | | - Marianne Chapleau
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada.,Département de Psychologie, Université de Montréal, Montreal, QC, Canada
| | - Arnaud Boré
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada
| | - Maxime Descoteaux
- Sherbrooke Connectivity Imaging Lab, Département d'Informatique, Université de Sherbrooke, Montreal, QC, Canada
| | - Simona M Brambati
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada.,Département de Psychologie, Université de Montréal, Montreal, QC, Canada
| |
Collapse
|
7
|
Muller J, Alizadeh M, Mohamed FB, Riley J, Pearce JJ, Trieu B, Liang TW, Romo V, Sharan A, Wu C. Clinically applicable delineation of the pallidal sensorimotor region in patients with advanced Parkinson's disease: study of probabilistic and deterministic tractography. J Neurosurg 2018; 131:1520-1531. [PMID: 30554176 DOI: 10.3171/2018.7.jns18541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 07/16/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Deep brain stimulation (DBS) is an effective procedure in improving motor symptoms for patients with advanced Parkinson's disease (PD) through the use of high-frequency stimulation. Although one of the most commonly used target sites for DBS, sensorimotor regions of the globus pallidus interna (GPi) have yet to be thoroughly described with advanced neuroimaging analysis in vivo for human subjects. Furthermore, many imaging studies to date have been performed in a research setting and bring into question the feasibility of their applications in a clinical setting, such as for surgical planning. This study compares two different tractography methods applied to clinically feasible acquisition sequences in identifying sensorimotor regions of the GPi and the subthalamic nucleus (STN) in patients with advanced PD selected to undergo DBS. METHODS Seven patients with refractory PD selected for DBS were examined by MRI. Diffusion images were acquired with an average acquisition time of 15 minutes. Probabilistic and deterministic tractography methods were applied to each diffusion-weighted data set using FSL and MRtrix, respectively. Fiber assignment was performed using combined sensorimotor areas as initiation seeds and the STN and GPi, separately, as inclusion masks. Corticospinal tracts were excluded by setting the cerebral peduncles as exclusion masks. Variability between proposed techniques was shown using center of gravity (CoG) coordinates. RESULTS Deterministic and probabilistic corticopallidal and corticosubthalamic pathways were successfully reconstructed for all subjects across all target sites (bilaterally). Both techniques displayed large connections between the sensorimotor cortex with the posterolateral aspect of the ipsilateral GPi and the posterosuperolateral aspect of the ipsilateral STN. The average variability was 2.67 mm, with the probabilistic method identifying the CoG consistently more posterior and more lateral than the deterministic method. CONCLUSIONS Successful delineation of the sensorimotor regions in both the GPi and STN is achievable within a clinically reasonable timeframe. The techniques described in this paper may enhance presurgical planning with increased accuracy and improvement of patient outcomes in patients undergoing DBS. The variability found between tracking techniques warrants the use of the probabilistic tractography method over the deterministic method for presurgical planning. Probabilistic tractography was found to have an advantage over deterministic tractography in its sensitivity, in accurately describing previously described tracts, and in its ability to detect a larger number of fibers.
Collapse
Affiliation(s)
| | | | | | | | | | - Benjamin Trieu
- 4College of Liberal Arts, Temple University, Philadelphia, Pennsylvania
| | | | - Victor Romo
- 6Anesthesiology, Thomas Jefferson University; and
| | | | | |
Collapse
|
8
|
Roine U, Roine TJ, Hakkarainen A, Tokola A, Balk MH, Mannerkoski M, Åberg LE, Lönnqvist T, Autti T. Global and Widespread Local White Matter Abnormalities in Juvenile Neuronal Ceroid Lipofuscinosis. AJNR Am J Neuroradiol 2018; 39:1349-1354. [PMID: 29853519 DOI: 10.3174/ajnr.a5687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 04/11/2018] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND PURPOSE Juvenile neuronal ceroid lipofuscinosis is a progressive neurodegenerative lysosomal storage disease of childhood. It manifests with loss of vision, seizures, and loss of cognitive and motor functions leading to premature death. Previous MR imaging studies have reported cerebral and cerebellar atrophy, progressive hippocampal atrophy, thalamic signal intensity alterations, and decreased white matter volume in the corona radiata. However, conventional MR imaging findings are usually normal at younger than 10 years of age. The purpose of our study was to investigate whether diffusion MR imaging could reveal changes in white matter microstructure already present at a younger age. MATERIALS AND METHODS We investigated global and local white matter abnormalities in 14 children with juvenile neuronal ceroid lipofuscinosis (mean age, 9.6 ± 3.4 years; 10 boys) and 14 control subjects (mean age, 11.2 ± 2.3 years; 7 boys). Twelve patients underwent follow-up MR imaging after 2 years (mean age, 11.4 ± 3.2 years; 8 boys). We performed a global analysis using 2 approaches: white matter tract skeleton and constrained spherical deconvolution-based whole-brain tractography. Then, we investigated local microstructural abnormalities using Tract-Based Spatial Statistics. RESULTS We found globally decreased anisotropy (P = .000001) and increased diffusivity (P = .001) in patients with juvenile neuronal ceroid lipofuscinosis. In addition, we found widespread increased diffusivity and decreased anisotropy in, for example, the corona radiata (P < .001) and posterior thalamic radiation (P < .001). However, we found no differences between the first and second acquisitions. CONCLUSIONS The patients with juvenile neuronal ceroid lipofuscinosis exhibited global and local abnormalities in white matter microstructure. Future studies could apply more specific microstructural models and study whether these abnormalities are already present at a younger age.
Collapse
Affiliation(s)
- U Roine
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center
| | - T J Roine
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center.,imec-Vision Lab (T.J.R.), Department of Physics, University of Antwerp, Wilrijk (Antwerp), Belgium
| | - A Hakkarainen
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center
| | - A Tokola
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center
| | - M H Balk
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center
| | | | - L E Åberg
- Psychiatry (L.E.Å), University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - T Lönnqvist
- Department of Child Neurology (T.L.), Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - T Autti
- From the Department of Radiology (U.R., T.J.R., A.H., A.T., M.H.B., T.A.), HUS Medical Imaging Center
| |
Collapse
|
9
|
Pieterman K, White TJ, van den Bosch GE, Niessen WJ, Reiss IKM, Tibboel D, Hoebeek FE, Dudink J. Cerebellar Growth Impairment Characterizes School-Aged Children Born Preterm without Perinatal Brain Lesions. AJNR Am J Neuroradiol 2018; 39:956-962. [PMID: 29567656 DOI: 10.3174/ajnr.a5589] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 01/12/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND PURPOSE Infants born preterm are commonly diagnosed with structural brain lesions known to affect long-term neurodevelopment negatively. Yet, the effects of preterm birth on brain development in the absence of intracranial lesions remain to be studied in detail. In this study, we aim to quantify long term consequences of preterm birth on brain development in this specific group. MATERIALS AND METHODS Neonatal cranial sonography and follow-up T1-weighted MR imaging and DTI were performed to evaluate whether the anatomic characteristics of the cerebrum and cerebellum in a cohort of school-aged children (6-12 years of age) were related to gestational age at birth in children free of brain lesions in the perinatal period. RESULTS In the cohort consisting of 36 preterm (28-37 weeks' gestational age) and 66 term-born infants, T1-weighted MR imaging and DTI at 6-12 years revealed a reduction of cerebellar white matter volume (β = 0.387, P < .001), altered fractional anisotropy of cerebellar white matter (β = -0.236, P = .02), and a reduction of cerebellar gray and white matter surface area (β = 0.337, P < .001; β = 0.375, P < .001, respectively) in relation to birth age. Such relations were not observed for the cerebral cortex or white matter volume, surface area, or diffusion quantities. CONCLUSIONS The results of our study show that perinatal influences that are not primarily neurologic are still able to disturb long-term neurodevelopment, particularly of the developing cerebellum. Including the cerebellum in future neuroprotective strategies seems therefore essential.
Collapse
Affiliation(s)
- K Pieterman
- From the Departments of Radiology and Medical Informatics (K.P., W.J.N.), Biomedical Imaging Group Rotterdam
| | - T J White
- Departments of Child and Adolescent Psychiatry (T.J.W.).,Radiology (T.J.W.)
| | | | - W J Niessen
- From the Departments of Radiology and Medical Informatics (K.P., W.J.N.), Biomedical Imaging Group Rotterdam.,Department of Imaging Physics (W.J.N.), Faculty of Applied Sciences, Delft University of Technology, Delft, the Netherlands.,Quantib BV (W.J.N.), Rotterdam, the Netherlands
| | - I K M Reiss
- Division of Neonatology, Department of Pediatrics (I.K.M.R.)
| | - D Tibboel
- Intensive Care and Paediatric Surgery (G.E.v.d.B., D.T.)
| | - F E Hoebeek
- Department of Neuroscience (F.E.H.), Erasmus Medical Centre, Rotterdam, the Netherlands
| | - J Dudink
- Department of Perinatology (J.D.), Wilhelmina Children's Hospital and Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.
| |
Collapse
|
10
|
Probing the reproducibility of quantitative estimates of structural connectivity derived from global tractography. Neuroimage 2018; 175:215-229. [PMID: 29438843 DOI: 10.1016/j.neuroimage.2018.01.086] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 01/12/2018] [Accepted: 01/30/2018] [Indexed: 11/20/2022] Open
Abstract
As quantitative measures derived from fiber tractography are increasingly being used to characterize the structural connectivity of the brain, it is important to establish their reproducibility. However, no such information is as yet available for global tractography. Here we provide the first comprehensive analysis of the reproducibility of streamline counts derived from global tractography as quantitative estimates of structural connectivity. In a sample of healthy young adults scanned twice within one week, within-session and between-session test-retest reproducibility was estimated for streamline counts of connections based on regions of the AAL atlas using the intraclass correlation coefficient (ICC) for absolute agreement. We further evaluated the influence of the type of head-coil (12 versus 32 channels) and the number of reconstruction repetitions (reconstructing streamlines once or aggregated over ten repetitions). Factorial analyses demonstrated that reproducibility was significantly greater for within- than between-session reproducibility and significantly increased by aggregating streamline counts over ten reconstruction repetitions. Using a high-resolution head-coil incurred only small beneficial effects. Overall, ICC values were positively correlated with the streamline count of a connection. Additional analyses assessed the influence of different selection variants (defining fuzzy versus no fuzzy borders of the seed mask; selecting streamlines that end in versus pass through a seed) showing that an endpoint-based variant using fuzzy selection provides the best compromise between reproducibility and anatomical specificity. In sum, aggregating quantitative indices over repeated estimations and higher numbers of streamlines are important determinants of test-retest reproducibility. If these factors are taken into account, streamline counts derived from global tractography provide an adequately reproducible quantitative measure that can be used to gauge the structural connectivity of the brain in health and disease.
Collapse
|
11
|
Cousineau M, Jodoin PM, Garyfallidis E, Côté MA, Morency FC, Rozanski V, Grand’Maison M, Bedell BJ, Descoteaux M. A test-retest study on Parkinson's PPMI dataset yields statistically significant white matter fascicles. Neuroimage Clin 2017; 16:222-233. [PMID: 28794981 PMCID: PMC5547250 DOI: 10.1016/j.nicl.2017.07.020] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 07/13/2017] [Accepted: 07/22/2017] [Indexed: 12/13/2022]
Abstract
In this work, we propose a diffusion MRI protocol for mining Parkinson's disease diffusion MRI datasets and recover robust disease-specific biomarkers. Using advanced high angular resolution diffusion imaging (HARDI) crossing fiber modeling and tractography robust to partial volume effects, we automatically dissected 50 white matter (WM) fascicles. These fascicles connect deep nuclei (thalamus, putamen, pallidum) to different cortical functional areas (associative, motor, sensorimotor, limbic), basal forebrain and substantia nigra. Then, among these 50 candidate WM fascicles, only the ones that passed a test-retest reproducibility procedure qualified for further tractometry analysis. Leveraging the unique 2-timepoints test-retest Parkinson's Progression Markers Initiative (PPMI) dataset of over 600 subjects, we found statistically significant differences in tract profiles along the subcortico-cortical pathways between Parkinson's disease patients and healthy controls. In particular, significant increases in FA, apparent fiber density, tract-density and generalized FA were detected in some locations of the nigro-subthalamo-putaminal-thalamo-cortical pathway. This connection is one of the major motor circuits balancing the coordination of motor output. Detailed and quantifiable knowledge on WM fascicles in these areas is thus essential to improve the quality and outcome of Deep Brain Stimulation, and to target new WM locations for investigation.
Collapse
Affiliation(s)
- Martin Cousineau
- Computer Science Department, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Pierre-Marc Jodoin
- Computer Science Department, Université de Sherbrooke, Sherbrooke, QC, Canada
- Imeka Solutions Inc., Sherbrooke, QC, Canada
| | - Eleftherios Garyfallidis
- Department of Intelligent Systems Engineering, School of Informatics and Computing, Indiana University, Bloomington, USA
| | - Marc-Alexandre Côté
- Computer Science Department, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Verena Rozanski
- Department of Neurology, Klinikum Grosshadern, University of Munich, Germany
| | | | - Barry J. Bedell
- Biospective Inc., Montréal, QC, Canada
- McGill University, Montréal, QC, Canada
| | - Maxime Descoteaux
- Computer Science Department, Université de Sherbrooke, Sherbrooke, QC, Canada
- Imeka Solutions Inc., Sherbrooke, QC, Canada
| |
Collapse
|
12
|
Liu J, Liu H, Mu J, Xu Q, Chen T, Dun W, Yang J, Tian J, Hu L, Zhang M. Altered white matter microarchitecture in the cingulum bundle in women with primary dysmenorrhea: A tract-based analysis study. Hum Brain Mapp 2017; 38:4430-4443. [PMID: 28590514 DOI: 10.1002/hbm.23670] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 04/06/2017] [Accepted: 05/19/2017] [Indexed: 12/30/2022] Open
Abstract
Primary dysmenorrhea (PD), as characterized by painful menstrual cramps without organic causes, is associated with central sensitization and brain function changes. Previous studies showed the integrated role of the default mode network (DMN) in the pain connectome and its key contribution on how an individual perceives and copes with pain disorders. Here, we aimed to investigate whether the cingulum bundle connecting hub regions of the DMN was disrupted in young women with PD. Diffusion tensor imaging was obtained in 41 PD patients and 41 matched healthy controls (HC) during their periovulatory phase. The production of prostaglandins (PGs) was obtained in PD patients during their pain-free and pain phases. As compared with HC, PD patients had similar scores of pain intensity, anxiety, and depression in their pain-free phase. However, altered white matter properties mainly located in the posterior section of the cingulum bundle were observed in PD. Besides PGs being related to menstrual pain, a close relationship was found between the white matter properties of the cingulum bundle during the pain-free phase and the severity of the menstrual pain in PD patients. Our study suggested that PD had trait changes of white matter integrities in the cingulum bundle that persisted beyond the time of menstruation. We inferred that altered anatomical connections may lead to less-flexible communication within the DMN, and/or between the DMN and other pain-related brain networks, which may result in the central susceptibility to develop chronic pain conditions in PD's later life. Hum Brain Mapp 38:4430-4443, 2017. © 2017 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Jixin Liu
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an, 710126, Peoples Republic of China.,Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, Xi'an, 710126, Peoples Republic of China
| | - Hongjuan Liu
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Peoples Republic of China
| | - Junya Mu
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an, 710126, Peoples Republic of China.,Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, Xi'an, 710126, Peoples Republic of China
| | - Qing Xu
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an, 710126, Peoples Republic of China.,Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, Xi'an, 710126, Peoples Republic of China
| | - Tao Chen
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an, 710126, Peoples Republic of China.,Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, Xi'an, 710126, Peoples Republic of China
| | - Wanghuan Dun
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Peoples Republic of China
| | - Jing Yang
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Peoples Republic of China
| | - Jie Tian
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an, 710126, Peoples Republic of China.,Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, Xi'an, 710126, Peoples Republic of China
| | - Li Hu
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.,Faculty of Psychology, Southwest University, Chongqing, China
| | - Ming Zhang
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, Peoples Republic of China
| |
Collapse
|
13
|
Milardi D, Cacciola A, Calamuneri A, Ghilardi MF, Caminiti F, Cascio F, Andronaco V, Anastasi G, Mormina E, Arrigo A, Bruschetta D, Quartarone A. The Olfactory System Revealed: Non-Invasive Mapping by using Constrained Spherical Deconvolution Tractography in Healthy Humans. Front Neuroanat 2017; 11:32. [PMID: 28443000 PMCID: PMC5385345 DOI: 10.3389/fnana.2017.00032] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 03/28/2017] [Indexed: 11/27/2022] Open
Abstract
Although the olfactory sense has always been considered with less interest than the visual, auditive or somatic senses, it does plays a major role in our ordinary life, with important implication in dangerous situations or in social and emotional behaviors. Traditional Diffusion Tensor signal model and related tractography have been used in the past years to reconstruct the cranial nerves, including the olfactory nerve (ON). However, no supplementary information with regard to the pathways of the olfactory network have been provided. Here, by using the more advanced Constrained Spherical Deconvolution (CSD) diffusion model, we show for the first time in vivo and non-invasively that, in healthy humans, the olfactory system has a widely distributed anatomical network to several cortical regions as well as to many subcortical structures. Although the present study focuses on an healthy sample size, a similar approach could be applied in the near future to gain important insights with regard to the early involvement of olfaction in several neurodegenerative disorders.
Collapse
Affiliation(s)
- Demetrio Milardi
- Centro Neurolesi Bonino Pulejo (IRCCS)Messina, Italy.,Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | | | - Alessandro Calamuneri
- Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | - Maria F Ghilardi
- Sophie Davis School for Biomedical Education, City College New York (CCNY), The City University of New York (CUNY)New York, NY, USA.,The Fresco Institute for Parkinson's and Movement Disorders, NYU Langone Medical Center, New York UniversityNew York, NY, USA
| | | | - Filippo Cascio
- Department of Otorhinolaryngology, Papardo HospitalMessina, Italy
| | | | - Giuseppe Anastasi
- Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | - Enricomaria Mormina
- Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | - Alessandro Arrigo
- Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | - Daniele Bruschetta
- Centro Neurolesi Bonino Pulejo (IRCCS)Messina, Italy.,Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| | - Angelo Quartarone
- Centro Neurolesi Bonino Pulejo (IRCCS)Messina, Italy.,Department of Biomedical, Dental Sciences and Morphological and Functional Images, University of MessinaMessina, Italy
| |
Collapse
|
14
|
Nowell M, Vos SB, Sidhu M, Wilcoxen K, Sargsyan N, Ourselin S, Duncan JS. Meyer's loop asymmetry and language lateralisation in epilepsy. J Neurol Neurosurg Psychiatry 2016; 87:836-42. [PMID: 26384513 PMCID: PMC4975828 DOI: 10.1136/jnnp-2015-311161] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 09/01/2015] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Several studies have suggested an asymmetry in Meyer's loop in individuals, with the left loop anterior to the right. In this study we test the hypothesis that there is an association between Meyer's loop asymmetry (MLA) and language lateralisation. METHODS 57 patients with epilepsy were identified with language functional MRI (fMRI) and diffusion MRI acquisition. Language lateralisation indices from fMRI(LI) and optic radiation and arcuate fasciculus probabilistic tractography was performed for each subject. The subjects were divided into left language dominant (LI>0.4) and non-left language groups (LI<0.4) according to their LI. RESULTS A negative linear correlation was identified between language lateralisation and MLA, with greater left lateralised language associated with more anteriorly placed left Meyer's loops (R value -0.34, p=0.01). There was a significant difference in mean MLA between the two groups, with the left loop being anterior to the right loop in the LI>0.4 group and posterior to the right loop in the LI<0.4 group (p=0.003). No correlation was found between language lateralisation and arcuate fasciculus volume. CONCLUSIONS This study suggests an association between the extent of Meyer's loop asymmetry and the lateralisation of language determined by fMRI in patients with epilepsy. Further studies should be carried out to evaluate this association in control subjects and with other measures of language lateralisation.
Collapse
Affiliation(s)
- Mark Nowell
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK MRI Unit, Epilepsy Society, Chalfont St Peter, UK
| | - Sjoerd B Vos
- MRI Unit, Epilepsy Society, Chalfont St Peter, UK Translational Imaging Group, Centre of Medical Imaging and Computing, UCL, London, UK
| | - Meneka Sidhu
- MRI Unit, Epilepsy Society, Chalfont St Peter, UK
| | | | | | - Sebastien Ourselin
- Translational Imaging Group, Centre of Medical Imaging and Computing, UCL, London, UK
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK MRI Unit, Epilepsy Society, Chalfont St Peter, UK
| |
Collapse
|
15
|
Petersen MV, Lund TE, Sunde N, Frandsen J, Rosendal F, Juul N, Østergaard K. Probabilistic versus deterministic tractography for delineation of the cortico-subthalamic hyperdirect pathway in patients with Parkinson disease selected for deep brain stimulation. J Neurosurg 2016; 126:1657-1668. [PMID: 27392264 DOI: 10.3171/2016.4.jns1624] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Diffusion-weighted MRI (DWI) and tractography allows noninvasive mapping of the structural connections of the brain, and may provide important information for neurosurgical planning. The hyperdirect pathway, connecting the subthalamic nucleus (STN) with the motor cortex, is assumed to play a key role in mediating the effects of deep brain stimulation (DBS), which is an effective but poorly understood treatment for Parkinson disease. This study aimed to apply recent methodological advances in DWI acquisition and analysis to the delineation of the hyperdirect pathway in patients with Parkinson disease selected for surgery. METHODS High spatial and angular resolution DWI data were acquired preoperatively from 5 patients with Parkinson disease undergoing DBS. The authors compared the delineated hyperdirect pathways and associated STN target maps generated by 2 different tractography methods: a tensor-based deterministic method, typically available in clinical settings, and an advanced probabilistic method based on constrained spherical deconvolution. In addition, 10 high-resolution data sets with the same scanning parameters were acquired from a healthy control participant to assess the robustness of the tractography results. RESULTS Both tractography approaches identified connections between the ipsilateral motor cortex and the STN. However, the 2 methods provided substantially different target regions in the STN, with the target center of gravity differing by > 1.4 mm on average. The probabilistic method (based on constrained spherical deconvolution) plausibly reconstructed a continuous set of connections from the motor cortex, terminating in the dorsolateral region of the STN. In contrast, the tensor-based method reconstructed a comparatively sparser and more variable subset of connections. Furthermore, across the control scans, the probabilistic method identified considerably more consistent targeting regions within the STN compared with the deterministic tensor-based method, which demonstrated a 1.9-2.4 times higher variation. CONCLUSIONS These data provide a strong impetus for the use of a robust probabilistic tractography framework based on constrained spherical deconvolution, or similar advanced DWI models, in clinical settings. The inherent limitations and demonstrated inaccuracy of the tensor-based method leave it questionable for use in high-precision stereotactic DBS surgery. The authors have also described a straightforward method for importing tractography-derived information into any clinical neuronavigation system, based on the generation of track-density images.
Collapse
Affiliation(s)
- Mikkel V Petersen
- Center of Functionally Integrative Neuroscience and.,Departments of 2 Neurosurgery
| | | | | | | | | | | | | |
Collapse
|
16
|
Vos SB, Aksoy M, Han Z, Holdsworth SJ, Maclaren J, Viergever MA, Leemans A, Bammer R. Trade-off between angular and spatial resolutions in in vivo fiber tractography. Neuroimage 2016; 129:117-132. [PMID: 26774615 PMCID: PMC4803623 DOI: 10.1016/j.neuroimage.2016.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 11/29/2015] [Accepted: 01/05/2016] [Indexed: 01/13/2023] Open
Abstract
Tractography is becoming an increasingly popular method to reconstruct white matter connections in vivo. The diffusion MRI data that tractography is based on requires a high angular resolution to resolve crossing fibers whereas high spatial resolution is required to distinguish kissing from crossing fibers. However, scan time increases with increasing spatial and angular resolutions, which can become infeasible in clinical settings. Here we investigated the trade-off between spatial and angular resolutions to determine which of these factors is most worth investing scan time in. We created a unique diffusion MRI dataset with 1.0 mm isotropic resolution and a high angular resolution (100 directions) using an advanced 3D diffusion-weighted multi-slab EPI acquisition. This dataset was reconstructed to create subsets of lower angular (75, 50, and 25 directions) and lower spatial (1.5, 2.0, and 2.5 mm) resolution. Using all subsets, we investigated the effects of angular and spatial resolutions in three fiber bundles-the corticospinal tract, arcuate fasciculus and corpus callosum-by analyzing the volumetric bundle overlap and anatomical correspondence between tracts. Our results indicate that the subsets of 25 and 50 directions provided inferior tract reconstructions compared with the datasets with 75 and 100 directions. Datasets with spatial resolutions of 1.0, 1.5, and 2.0 mm were comparable, while the lowest resolution (2.5 mm) datasets had discernible inferior quality. In conclusion, we found that angular resolution appeared to be more influential than spatial resolution in improving tractography results. Spatial resolutions higher than 2.0 mm only appear to benefit multi-fiber tractography methods if this is not at the cost of decreased angular resolution.
Collapse
Affiliation(s)
- Sjoerd B Vos
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands; Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States.
| | - Murat Aksoy
- Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States
| | - Zhaoying Han
- Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States
| | - Samantha J Holdsworth
- Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States
| | - Julian Maclaren
- Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States
| | - Max A Viergever
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Alexander Leemans
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Roland Bammer
- Department of Radiology, Lucas Center, Stanford University, Stanford, CA, United States
| |
Collapse
|
17
|
Language learning and brain reorganization in a 3.5-year-old child with left perinatal stroke revealed using structural and functional connectivity. Cortex 2016; 77:95-118. [DOI: 10.1016/j.cortex.2016.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 08/09/2015] [Accepted: 01/18/2016] [Indexed: 11/20/2022]
|
18
|
Hirai KK, Groisser BN, Copen WA, Singhal AB, Schaechter JD. Comparing prognostic strength of acute corticospinal tract injury measured by a new diffusion tensor imaging based template approach versus common approaches. J Neurosci Methods 2016; 257:204-13. [PMID: 26386285 PMCID: PMC4666681 DOI: 10.1016/j.jneumeth.2015.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Long-term motor outcome of acute stroke patients with severe motor impairment is difficult to predict. While measure of corticospinal tract (CST) injury based on diffusion tensor imaging (DTI) in subacute stroke patients strongly predicts motor outcome, its predictive value in acute stroke patients is unclear. Using a new DTI-based, density-weighted CST template approach, we demonstrated recently that CST injury measured in acute stroke patients with moderately-severe to severe motor impairment of the upper limb strongly predicts motor outcome of the limb at 6 months. NEW METHOD The current study compared the prognostic strength of CST injury measured in 10 acute stroke patients with moderately-severe to severe motor impairment of the upper limb by the new density-weighted CST template approach versus several variants of commonly used DTI-based approaches. RESULTS AND COMPARISON WITH EXISTING METHODS Use of the density-weighted CST template approach yielded measurements of acute CST injury that correlated most strongly, in absolute magnitude, with 6-month upper limb strength (rs=0.93), grip (rs=0.94) and dexterity (rs=0.89) compared to all other 11 approaches. Formal statistical comparison of correlation coefficients revealed that acute CST injury measured by the density-weighted CST template approach correlated significantly more strongly with 6-month upper limb strength, grip and dexterity than 9, 10 and 6 of the 11 alternative measurements, respectively. CONCLUSIONS Measurements of CST injury in acute stroke patients with substantial motor impairment by the density-weighted CST template approach may have clinical utility for anticipating healthcare needs and improving clinical trial design.
Collapse
Affiliation(s)
- Kelsi K Hirai
- MGH/HST Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Benjamin N Groisser
- MGH/HST Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - William A Copen
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Aneesh B Singhal
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Judith D Schaechter
- MGH/HST Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States; Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
| |
Collapse
|
19
|
Snow NJ, Peters S, Borich MR, Shirzad N, Auriat AM, Hayward KS, Boyd LA. A reliability assessment of constrained spherical deconvolution-based diffusion-weighted magnetic resonance imaging in individuals with chronic stroke. J Neurosci Methods 2016; 257:109-20. [DOI: 10.1016/j.jneumeth.2015.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/12/2015] [Accepted: 09/16/2015] [Indexed: 11/26/2022]
|
20
|
Delouche A, Attyé A, Heck O, Grand S, Kastler A, Lamalle L, Renard F, Krainik A. Diffusion MRI: Pitfalls, literature review and future directions of research in mild traumatic brain injury. Eur J Radiol 2016; 85:25-30. [PMID: 26724645 DOI: 10.1016/j.ejrad.2015.11.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 10/06/2015] [Accepted: 11/01/2015] [Indexed: 12/27/2022]
|
21
|
Mormina E, Longo M, Arrigo A, Alafaci C, Tomasello F, Calamuneri A, Marino S, Gaeta M, Vinci SL, Granata F. MRI Tractography of Corticospinal Tract and Arcuate Fasciculus in High-Grade Gliomas Performed by Constrained Spherical Deconvolution: Qualitative and Quantitative Analysis. AJNR Am J Neuroradiol 2015; 36:1853-8. [PMID: 26113071 DOI: 10.3174/ajnr.a4368] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 03/10/2015] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging tractography is increasingly used to perform noninvasive presurgical planning for brain gliomas. Recently, constrained spherical deconvolution tractography was shown to overcome several limitations of commonly used DTI tractography. The purpose of our study was to evaluate WM tract alterations of both the corticospinal tract and arcuate fasciculus in patients with high-grade gliomas, through qualitative and quantitative analysis of probabilistic constrained spherical deconvolution tractography, to perform reliable presurgical planning. MATERIALS AND METHODS Twenty patients with frontoparietal high-grade gliomas were recruited and evaluated by using a 3T MR imaging scanner with both morphologic and diffusion sequences (60 diffusion directions). We performed probabilistic constrained spherical deconvolution tractography and tract quantification following diffusion tensor parameters: fractional anisotropy; mean diffusivity; linear, planar, and spherical coefficients. RESULTS In all patients, we obtained tractographic reconstructions of the medial and lateral portions of the corticospinal tract and arcuate fasciculus, both on the glioma-affected and nonaffected sides of the brain. The affected lateral corticospinal tract and the arcuate fasciculus showed decreased fractional anisotropy (z = 2.51, n = 20, P = .006; z = 2.52, n = 20, P = .006) and linear coefficient (z = 2.51, n = 20, P = .006; z = 2.52, n = 20, P = .006) along with increased spherical coefficient (z = -2.51, n = 20, P = .006; z = -2.52, n = 20, P = .006). Mean diffusivity values were increased only in the lateral corticospinal tract (z = -2.53, n = 20, P = .006). CONCLUSIONS In this study, we demonstrated that probabilistic constrained spherical deconvolution can provide essential qualitative and quantitative information in presurgical planning, which was not otherwise achievable with DTI. These findings can have important implications for the surgical approach and postoperative outcome in patients with glioma.
Collapse
Affiliation(s)
- E Mormina
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| | - M Longo
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| | - A Arrigo
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| | - C Alafaci
- Neurosciences (C.A., F.T., A.C.), University of Messina, Messina, Italy
| | - F Tomasello
- Neurosciences (C.A., F.T., A.C.), University of Messina, Messina, Italy
| | - A Calamuneri
- Neurosciences (C.A., F.T., A.C.), University of Messina, Messina, Italy
| | - S Marino
- Scientific Institute for Recovery and Care Centro Neurolesi Bonino Pulejo (S.M.), Messina, Italy
| | - M Gaeta
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| | - S L Vinci
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| | - F Granata
- From the Departments of Biomedical Science and Morphological and Functional Images (E.M., F.G., A.A., M.G., S.L.V., M.L.)
| |
Collapse
|
22
|
Thiebaut de Schotten M, Dell'Acqua F, Ratiu P, Leslie A, Howells H, Cabanis E, Iba-Zizen MT, Plaisant O, Simmons A, Dronkers NF, Corkin S, Catani M. From Phineas Gage and Monsieur Leborgne to H.M.: Revisiting Disconnection Syndromes. Cereb Cortex 2015; 25:4812-27. [PMID: 26271113 PMCID: PMC4635921 DOI: 10.1093/cercor/bhv173] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
On the 50th anniversary of Norman Geschwind's seminal paper entitled ‘Disconnexion syndrome in animal and man’, we pay tribute to his ideas by applying contemporary tractography methods to understand white matter disconnection in 3 classic cases that made history in behavioral neurology. We first documented the locus and extent of the brain lesion from the computerized tomography of Phineas Gage's skull and the magnetic resonance images of Louis Victor Leborgne's brain, Broca's first patient, and Henry Gustave Molaison. We then applied the reconstructed lesions to an atlas of white matter connections obtained from diffusion tractography of 129 healthy adults. Our results showed that in all 3 patients, disruption extended to connections projecting to areas distant from the lesion. We confirmed that the damaged tracts link areas that in contemporary neuroscience are considered functionally engaged for tasks related to emotion and decision-making (Gage), language production (Leborgne), and declarative memory (Molaison). Our findings suggest that even historic cases should be reappraised within a disconnection framework whose principles were plainly established by the associationist schools in the last 2 centuries.
Collapse
Affiliation(s)
- M Thiebaut de Schotten
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and Brain Connectivity and Behaviour, Brain and Spine Institute, Paris, France Inserm U 1127; UPMC-Paris6, UMR_S 1127; CNRS UMR 7225, CRICM, GH Pitié-Salpêtrière, 75013 Paris, France
| | - F Dell'Acqua
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| | - P Ratiu
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and
| | - A Leslie
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| | - H Howells
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| | - E Cabanis
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France
| | - M T Iba-Zizen
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France
| | - O Plaisant
- University of Paris-Descartes, GH Pitié-Salpêtrière, URDIA, EA4465, Paris, France
| | - A Simmons
- Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| | - N F Dronkers
- VA Northern California Health Care System, Martinez, CA, USA Department of Neurology, University of California, Davis, CA, USA National Research University Higher School of Economics, Russian Federation
| | - S Corkin
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - M Catani
- Natbrainlab, Department of FANS, Institute of Psychiatry, Psychology and Neuroscience and Department of Neuroimaging, Institute of Psychiatry, King's College London, London, UK
| |
Collapse
|
23
|
Roine T, Jeurissen B, Perrone D, Aelterman J, Philips W, Leemans A, Sijbers J. Informed constrained spherical deconvolution (iCSD). Med Image Anal 2015; 24:269-281. [DOI: 10.1016/j.media.2015.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 12/22/2014] [Accepted: 01/05/2015] [Indexed: 11/25/2022]
|
24
|
Reijmer YD, Schultz AP, Leemans A, O'Sullivan MJ, Gurol ME, Sperling R, Greenberg SM, Viswanathan A, Hedden T. Decoupling of structural and functional brain connectivity in older adults with white matter hyperintensities. Neuroimage 2015; 117:222-9. [PMID: 26025290 DOI: 10.1016/j.neuroimage.2015.05.054] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/30/2015] [Accepted: 05/09/2015] [Indexed: 12/23/2022] Open
Abstract
Age-related impairments in the default network (DN) have been related to disruptions in connecting white matter tracts. We hypothesized that the local correlation between DN structural and functional connectivity is negatively affected in the presence of global white matter injury. In 125 clinically normal older adults, we tested whether the relationship between structural connectivity (via diffusion imaging tractography) and functional connectivity (via resting-state functional MRI) of the posterior cingulate cortex (PCC) and medial prefrontal frontal cortex (MPFC) of the DN was altered in the presence of white matter hyperintensities (WMH). A significant correlation was observed between microstructural properties of the cingulum bundle and MPFC-PCC functional connectivity in individuals with low WMH load, but not with high WMH load. No correlation was observed between PCC-MPFC functional connectivity and microstructure of the inferior longitudinal fasciculus, a tract not passing through the PCC or MPFC. Decoupling of connectivity, measured as the absolute difference between structural and functional connectivity, in the high WMH group was related to poorer executive functioning and memory performance. These results suggest that such decoupling may reflect reorganization of functional networks in response to global white matter pathology and may provide an early marker of clinically relevant network alterations.
Collapse
Affiliation(s)
- Y D Reijmer
- Dept. of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - A P Schultz
- Dept. of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA
| | - A Leemans
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands
| | - M J O'Sullivan
- Dept. of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK
| | - M E Gurol
- Dept. of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - R Sperling
- Dept. of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Dept. of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA; Dept. of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - S M Greenberg
- Dept. of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - A Viswanathan
- Dept. of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - T Hedden
- Dept. of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA
| |
Collapse
|
25
|
Rojkova K, Volle E, Urbanski M, Humbert F, Dell'Acqua F, Thiebaut de Schotten M. Atlasing the frontal lobe connections and their variability due to age and education: a spherical deconvolution tractography study. Brain Struct Funct 2015; 221:1751-66. [PMID: 25682261 DOI: 10.1007/s00429-015-1001-3] [Citation(s) in RCA: 206] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 02/02/2015] [Indexed: 12/13/2022]
Abstract
In neuroscience, there is a growing consensus that higher cognitive functions may be supported by distributed networks involving different cerebral regions, rather than by single brain areas. Communication within these networks is mediated by white matter tracts and is particularly prominent in the frontal lobes for the control and integration of information. However, the detailed mapping of frontal connections remains incomplete, albeit crucial to an increased understanding of these cognitive functions. Based on 47 high-resolution diffusion-weighted imaging datasets (age range 22-71 years), we built a statistical normative atlas of the frontal lobe connections in stereotaxic space, using state-of-the-art spherical deconvolution tractography. We dissected 55 tracts including U-shaped fibers. We further characterized these tracts by measuring their correlation with age and education level. We reported age-related differences in the microstructural organization of several, specific frontal fiber tracts, but found no correlation with education level. Future voxel-based analyses, such as voxel-based morphometry or tract-based spatial statistics studies, may benefit from our atlas by identifying the tracts and networks involved in frontal functions. Our atlas will also build the capacity of clinicians to further understand the mechanisms involved in brain recovery and plasticity, as well as assist clinicians in the diagnosis of disconnection or abnormality within specific tracts of individual patients with various brain diseases.
Collapse
Affiliation(s)
- K Rojkova
- CNRS UMR 7225, Inserm, UPMC-Paris6, UMR_S 1127, CRICM, GH Pitié-Salpêtrière, 75013, Paris, France.,Natbrainlab, Brain and Spine Institute, Paris, France
| | - E Volle
- CNRS UMR 7225, Inserm, UPMC-Paris6, UMR_S 1127, CRICM, GH Pitié-Salpêtrière, 75013, Paris, France
| | - M Urbanski
- CNRS UMR 7225, Inserm, UPMC-Paris6, UMR_S 1127, CRICM, GH Pitié-Salpêtrière, 75013, Paris, France.,Service de Médecine et de Réadaptation Gériatrique et Neurologique, Hôpitaux de Saint-Maurice, Saint-Maurice, France
| | - F Humbert
- Centre de Neuroimagerie de Recherche CENIR, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - F Dell'Acqua
- Department of Neuroimaging, Institute of Psychiatry, Natbrainlab, King's College London, London, UK
| | - M Thiebaut de Schotten
- CNRS UMR 7225, Inserm, UPMC-Paris6, UMR_S 1127, CRICM, GH Pitié-Salpêtrière, 75013, Paris, France. .,Natbrainlab, Brain and Spine Institute, Paris, France. .,Natbrainlab, Sackler Institute of Translational Neurodevelopment, Institute of Psychiatry, King's College London, London, UK.
| |
Collapse
|
26
|
Roine U, Salmi J, Roine T, Wendt TNV, Leppämäki S, Rintahaka P, Tani P, Leemans A, Sams M. Constrained spherical deconvolution-based tractography and tract-based spatial statistics show abnormal microstructural organization in Asperger syndrome. Mol Autism 2015; 6:4. [PMID: 25874076 PMCID: PMC4396538 DOI: 10.1186/2040-2392-6-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 12/11/2014] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND The aim of this study was to investigate potential differences in neural structure in individuals with Asperger syndrome (AS), high-functioning individuals with autism spectrum disorder (ASD). The main symptoms of AS are severe impairments in social interactions and restricted or repetitive patterns of behaviors, interests or activities. METHODS Diffusion weighted magnetic resonance imaging data were acquired for 14 adult males with AS and 19 age, sex and IQ-matched controls. Voxelwise group differences in fractional anisotropy (FA) were studied with tract-based spatial statistics (TBSS). Based on the results of TBSS, a tract-level comparison was performed with constrained spherical deconvolution (CSD)-based tractography, which is able to detect complex (for example, crossing) fiber configurations. In addition, to investigate the relationship between the microstructural changes and the severity of symptoms, we looked for correlations between FA and the Autism Spectrum Quotient (AQ), Empathy Quotient and Systemizing Quotient. RESULTS TBSS revealed widely distributed local increases in FA bilaterally in individuals with AS, most prominent in the temporal part of the superior longitudinal fasciculus, corticospinal tract, splenium of corpus callosum, anterior thalamic radiation, inferior fronto-occipital fasciculus (IFO), posterior thalamic radiation, uncinate fasciculus and inferior longitudinal fasciculus (ILF). CSD-based tractography also showed increases in the FA in multiple tracts. However, only the difference in the left ILF was significant after a Bonferroni correction. These results were not explained by the complexity of microstructural organization, measured using the planar diffusion coefficient. In addition, we found a correlation between AQ and FA in the right IFO in the whole group. CONCLUSIONS Our results suggest that there are local and tract-level abnormalities in white matter (WM) microstructure in our homogenous and carefully characterized group of adults with AS, most prominent in the left ILF.
Collapse
Affiliation(s)
- Ulrika Roine
- Brain and Mind Laboratory, Department of Biomedical Engineering and Computational Science, Aalto University, Rakentajanaukio 2 C, FI-02150 Espoo, Finland
| | - Juha Salmi
- Brain and Mind Laboratory, Department of Biomedical Engineering and Computational Science, Aalto University, Rakentajanaukio 2 C, FI-02150 Espoo, Finland
| | - Timo Roine
- iMinds-Vision Lab, Department of Physics, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Antwerp Belgium
| | - Taina Nieminen-von Wendt
- Neuropsychiatric Rehabilitation and Medical Centre Neuromental, Kaupintie 11 A, FI-00440 Helsinki, Finland
| | - Sami Leppämäki
- Department of Psychiatry, Clinic for Neuropsychiatry, Helsinki University Central Hospital, Tukholmankatu 8 F, FI-00290 Helsinki, Finland ; Finnish Institute of Occupational Health, Topeliuksenkatu 41, FI-00290 Helsinki, Finland
| | - Pertti Rintahaka
- Department of Psychiatry, Clinic for Neuropsychiatry, Helsinki University Central Hospital, Tukholmankatu 8 F, FI-00290 Helsinki, Finland
| | - Pekka Tani
- Department of Psychiatry, Clinic for Neuropsychiatry, Helsinki University Central Hospital, Tukholmankatu 8 F, FI-00290 Helsinki, Finland
| | - Alexander Leemans
- Image Sciences Institute, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Mikko Sams
- Brain and Mind Laboratory, Department of Biomedical Engineering and Computational Science, Aalto University, Rakentajanaukio 2 C, FI-02150 Espoo, Finland ; Advanced Magnetic Imaging Centre, Aalto University, Otakaari 5, FI-02150 Espoo, Finland
| |
Collapse
|
27
|
Arrigo A, Mormina E, Anastasi GP, Gaeta M, Calamuneri A, Quartarone A, De Salvo S, Bruschetta D, Rizzo G, Trimarchi F, Milardi D. Constrained spherical deconvolution analysis of the limbic network in human, with emphasis on a direct cerebello-limbic pathway. Front Hum Neurosci 2014; 8:987. [PMID: 25538606 PMCID: PMC4259125 DOI: 10.3389/fnhum.2014.00987] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 11/19/2014] [Indexed: 11/28/2022] Open
Abstract
The limbic system is part of an intricate network which is involved in several functions like memory and emotion. Traditionally the role of the cerebellum was considered mainly associated to motion control; however several evidences are raising about a role of the cerebellum in learning skills, emotions control, mnemonic and behavioral processes involving also connections with limbic system. In 15 normal subjects we studied limbic connections by probabilistic Constrained Spherical Deconvolution (CSD) tractography. The main result of our work was to prove for the first time in human brain the existence of a direct cerebello-limbic pathway which was previously hypothesized but never demonstrated. We also extended our analysis to the other limbic connections including cingulate fasciculus, inferior longitudinal fasciculus, uncinated fasciculus, anterior thalamic connections and fornix. Although these pathways have been already described in the tractographic literature we provided reconstruction, quantitative analysis and Fractional Anisotropy (FA) right-left symmetry comparison using probabilistic CSD tractography that is known to provide a potential improvement compared to previously used Diffusion Tensor Imaging (DTI) techniques. The demonstration of the existence of cerebello-limbic pathway could constitute an important step in the knowledge of the anatomic substrate of non-motor cerebellar functions. Finally the CSD statistical data about limbic connections in healthy subjects could be potentially useful in the diagnosis of pathological disorders damaging this system.
Collapse
Affiliation(s)
- Alessandro Arrigo
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Enricomaria Mormina
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Giuseppe Pio Anastasi
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Michele Gaeta
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | | | | | | | - Daniele Bruschetta
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Giuseppina Rizzo
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Fabio Trimarchi
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy
| | - Demetrio Milardi
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina Messina, Italy ; IRCCS Centro Neurolesi Bonino Pulejo Messina, Italy
| |
Collapse
|
28
|
Milardi D, Gaeta M, Marino S, Arrigo A, Vaccarino G, Mormina E, Rizzo G, Milazzo C, Finocchio G, Baglieri A, Anastasi G, Quartarone A. Basal ganglia network by constrained spherical deconvolution: a possible cortico-pallidal pathway? Mov Disord 2014; 30:342-9. [PMID: 25156805 DOI: 10.1002/mds.25995] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 07/16/2014] [Accepted: 07/17/2014] [Indexed: 12/26/2022] Open
Abstract
In the recent past, basal ganglia circuitry was simplified as represented by the direct and indirect pathways and by hyperdirect pathways. Based on data from animal studies, we hypothesized a fourth pathway, the cortico-pallidal, pathway, that complements the hyperdirect pathway to the subthalamus. Ten normal brains were analyzed by using the high angular resolution diffusion imaging-constrained spherical deconvolution (CSD)-based technique. The study was performed with a 3T magnetic resonance imaging (MRI) scanner (Achieva, Philips Healthcare, Best, Netherlands); by using a 32-channel SENSE head coil. We showed that CSD is a powerful technique that allows a fine evaluation of both the long and small tracts between cortex and basal ganglia, including direct, indirect, and hyperdirect pathways. In addition, a pathway directly connecting the cortex to the globus pallidus was seen. Our results confirm that the CSD tractography is a valuable technique allowing a reliable reconstruction of small- and long-fiber pathways in brain regions with multiple fiber orientations, such as basal ganglia. This could open a future scenario in which CSD could be used to focally target with deep brain stimulation (DBS) the small bundles within the basal ganglia loops.
Collapse
Affiliation(s)
- Demetrio Milardi
- Department of Biomedical Sciences and Morphological and Functional Images, University of Messina, Italy; IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Diffusion tensor MRI of chemotherapy-induced cognitive impairment in non-CNS cancer patients: a review. Brain Imaging Behav 2014; 7:409-35. [PMID: 23329357 DOI: 10.1007/s11682-012-9220-1] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Patients with non-central nervous system cancers often experience subtle cognitive deficits after treatment with cytotoxic agents. Therapy-induced structural changes to the brain could be one of the possible causes underlying these reported cognitive deficits. In this review, we evaluate the use of diffusion tensor imaging (DTI) for assessing possible therapy-induced changes in the microstructure of the cerebral white matter (WM) and provide a critical overview of the published DTI research on therapy-induced cognitive impairment. Both cross-sectional and longitudinal DTI studies have demonstrated abnormal microstructural properties in WM regions involved in cognition. These findings correlated with cognitive performance, suggesting that there is a link between reduced "WM integrity" and chemotherapy-induced impaired cognition. In this paper, we will also introduce the basics of diffusion tensor imaging and how it can be applied to evaluate effects of therapy on structural changes in cerebral WM. The review concludes with considerations and discussion regarding DTI data interpretation and possible future directions for investigating therapy-induced WM changes in cancer patients. This review article is part of a Special Issue entitled: Neuroimaging Studies of Cancer and Cancer Treatment.
Collapse
|
30
|
Moreno-Dominguez D, Anwander A, Knösche TR. A hierarchical method for whole-brain connectivity-based parcellation. Hum Brain Mapp 2014; 35:5000-25. [PMID: 24740833 DOI: 10.1002/hbm.22528] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/01/2014] [Accepted: 04/03/2014] [Indexed: 11/08/2022] Open
Abstract
In modern neuroscience there is general agreement that brain function relies on networks and that connectivity is therefore of paramount importance for brain function. Accordingly, the delineation of functional brain areas on the basis of diffusion magnetic resonance imaging (dMRI) and tractography may lead to highly relevant brain maps. Existing methods typically aim to find a predefined number of areas and/or are limited to small regions of grey matter. However, it is in general not likely that a single parcellation dividing the brain into a finite number of areas is an adequate representation of the function-anatomical organization of the brain. In this work, we propose hierarchical clustering as a solution to overcome these limitations and achieve whole-brain parcellation. We demonstrate that this method encodes the information of the underlying structure at all granularity levels in a hierarchical tree or dendrogram. We develop an optimal tree building and processing pipeline that reduces the complexity of the tree with minimal information loss. We show how these trees can be used to compare the similarity structure of different subjects or recordings and how to extract parcellations from them. Our novel approach yields a more exhaustive representation of the real underlying structure and successfully tackles the challenge of whole-brain parcellation.
Collapse
Affiliation(s)
- David Moreno-Dominguez
- Research Group "Cortical Networks and Cognitive Functions," Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | | | | |
Collapse
|
31
|
Roine T, Jeurissen B, Perrone D, Aelterman J, Leemans A, Philips W, Sijbers J. Isotropic non-white matter partial volume effects in constrained spherical deconvolution. Front Neuroinform 2014; 8:28. [PMID: 24734018 PMCID: PMC3975100 DOI: 10.3389/fninf.2014.00028] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 03/02/2014] [Indexed: 02/05/2023] Open
Abstract
Diffusion-weighted (DW) magnetic resonance imaging (MRI) is a non-invasive imaging method, which can be used to investigate neural tracts in the white matter (WM) of the brain. Significant partial volume effects (PVEs) are present in the DW signal due to relatively large voxel sizes. These PVEs can be caused by both non-WM tissue, such as gray matter (GM) and cerebrospinal fluid (CSF), and by multiple non-parallel WM fiber populations. High angular resolution diffusion imaging (HARDI) methods have been developed to correctly characterize complex WM fiber configurations, but to date, many of the HARDI methods do not account for non-WM PVEs. In this work, we investigated the isotropic PVEs caused by non-WM tissue in WM voxels on fiber orientations extracted with constrained spherical deconvolution (CSD). Experiments were performed on simulated and real DW-MRI data. In particular, simulations were performed to demonstrate the effects of varying the diffusion weightings, signal-to-noise ratios (SNRs), fiber configurations, and tissue fractions. Our results show that the presence of non-WM tissue signal causes a decrease in the precision of the detected fiber orientations and an increase in the detection of false peaks in CSD. We estimated 35-50% of WM voxels to be affected by non-WM PVEs. For HARDI sequences, which typically have a relatively high degree of diffusion weighting, these adverse effects are most pronounced in voxels with GM PVEs. The non-WM PVEs become severe with 50% GM volume for maximum spherical harmonics orders of 8 and below, and already with 25% GM volume for higher orders. In addition, a low diffusion weighting or SNR increases the effects. The non-WM PVEs may cause problems in connectomics, where reliable fiber tracking at the WM-GM interface is especially important. We suggest acquiring data with high diffusion-weighting 2500-3000 s/mm(2), reasonable SNR (~30) and using lower SH orders in GM contaminated regions to minimize the non-WM PVEs in CSD.
Collapse
Affiliation(s)
- Timo Roine
- iMinds-Vision Lab, Department of Physics, University of AntwerpAntwerp, Belgium
| | - Ben Jeurissen
- iMinds-Vision Lab, Department of Physics, University of AntwerpAntwerp, Belgium
| | - Daniele Perrone
- Ghent University-iMinds/Image Processing and InterpretationGhent, Belgium
| | - Jan Aelterman
- Ghent University-iMinds/Image Processing and InterpretationGhent, Belgium
| | - Alexander Leemans
- Image Sciences Institute, University Medical Center UtrechtUtrecht, Netherlands
| | - Wilfried Philips
- Ghent University-iMinds/Image Processing and InterpretationGhent, Belgium
| | - Jan Sijbers
- iMinds-Vision Lab, Department of Physics, University of AntwerpAntwerp, Belgium
| |
Collapse
|
32
|
Aarnink SH, Vos SB, Leemans A, Jernigan TL, Madsen KS, Baaré WFC. Automated longitudinal intra-subject analysis (ALISA) for diffusion MRI tractography. Neuroimage 2014; 86:404-16. [PMID: 24157921 DOI: 10.1016/j.neuroimage.2013.10.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 10/10/2013] [Indexed: 12/13/2022] Open
Affiliation(s)
- Saskia H Aarnink
- Image Sciences Institute, University Medical Center Utrecht, the Netherlands; Elkerliek Hospital, Medical Physics, Helmond, The Netherlands
| | - Sjoerd B Vos
- Image Sciences Institute, University Medical Center Utrecht, the Netherlands.
| | - Alexander Leemans
- Image Sciences Institute, University Medical Center Utrecht, the Netherlands
| | - Terry L Jernigan
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark; Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark; Center for Human Development, University of California, San Diego, La Jolla, CA, USA
| | - Kathrine Skak Madsen
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen, Denmark
| | - William F C Baaré
- Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark
| |
Collapse
|
33
|
Diffusion Magnetic Resonance Imaging and Fiber Tractography. PET Clin 2013; 8:279-93. [DOI: 10.1016/j.cpet.2013.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|