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Sun W, Xu D, Yang Y, Wen L, Yu H, Xing Y, Song X, Li H, Xu H. Improved Detection of Target Metabolites in Brain Tumors with Intermediate TE, High SNR, and High Bandwidth Spin-Echo Sequence at 5T. AJNR Am J Neuroradiol 2024; 45:461-467. [PMID: 38453417 PMCID: PMC11288575 DOI: 10.3174/ajnr.a8150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/06/2023] [Indexed: 03/09/2024]
Abstract
BACKGROUND AND PURPOSE Due to high chemical shift displacement, challenges emerge at ultra-high fields when measuring metabolites using 1H-MRS. Our goal was to investigate how well the high SNR and high bandwidth spin-echo (HISE) technique perform at 5T for detecting target metabolites in brain tumors. MATERIALS AND METHODS Twenty-six subjects suspected of having brain tumors were enrolled. HISE and point-resolved spectroscopy (PRESS) single-voxel spectroscopy scans were collected with a 5T clinical scanner with an intermediate TE (TE = 144 ms). The main metabolites, including total NAA, Cr, and total Cho, were accessed and compared between HISE and PRESS using a paired Student t test, with full width at half maximum and SNR as covariates. The detection rate of specific metabolites, including lactate, alanine, and lipid, and subjective spectral quality were accessed and compared between HISE and PRESS. RESULTS Twenty-three pathologically confirmed brain tumors were included. Only the full width at half maximum for total NAA was significantly lower with HISE than with PRESS (P < .05). HISE showed a significantly higher SNR for total NAA, Cr, and total Cho compared with PRESS (P < .05). Lactate was detected in 21 of the 23 cases using HISE, but in only 4 cases using PRESS. HISE detected alanine in 8 of 9 meningiomas, whereas PRESS detected alanine in just 3 meningiomas. PRESS found lipid in more cases than HISE, while HISE outperformed PRESS in terms of subjective spectral quality. CONCLUSIONS HISE outperformed the clinical standard PRESS technique in detecting target metabolites of brain tumors at 5T, particularly lactate and alanine.
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Affiliation(s)
- Wenbo Sun
- From the Department of Radiology (W.S., H.L., H.X.), Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Dan Xu
- Department of Nuclear Medicine (D.X.), Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - YanXing Yang
- United-Imaging Healthcare (Y.Y., L.W., H.Y., Y.X., X.S.), Shanghai, China
| | - Linfei Wen
- United-Imaging Healthcare (Y.Y., L.W., H.Y., Y.X., X.S.), Shanghai, China
| | - Hanjiang Yu
- United-Imaging Healthcare (Y.Y., L.W., H.Y., Y.X., X.S.), Shanghai, China
| | - Yaowen Xing
- United-Imaging Healthcare (Y.Y., L.W., H.Y., Y.X., X.S.), Shanghai, China
| | - Xiaopeng Song
- United-Imaging Healthcare (Y.Y., L.W., H.Y., Y.X., X.S.), Shanghai, China
| | - Huan Li
- From the Department of Radiology (W.S., H.L., H.X.), Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Haibo Xu
- From the Department of Radiology (W.S., H.L., H.X.), Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
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Hossain S, Taracila V, Robb FJ, Moore J, Winkler SA. Design of a volumetric cylindrical coil-tuned at 298 MHz for 7 T imaging. INSTRUMENTATION SCIENCE & TECHNOLOGY 2023; 52:433-455. [PMID: 39100769 PMCID: PMC11293480 DOI: 10.1080/10739149.2023.2286376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
The concept of a 2D cylindrical High Pass Ladder (2D c-HPL) is used in the development of this ultra high radio frequency (UHRF) volumetric head coil for 7T tuned at the Larmor frequency of 298 MHz. The architecture of the 2D c-HPL helps to overcome the challenges associated with non-uniform magnetic field distribution. The prototype consists of an individual resonating array of inductance-capacitance (LC) elements and each component is tuned to the precisef o frequency. The tuning of the (i) inductance, (ii) capacitance, (iii) mesh size, and (iv) coupling coefficient play critical roles to attain the desired Larmor frequency. For this proof-of-concept, the prototype of a volumetric head coil consists of a cylindrical array size of 4 ×6, with individual LC components of inductance magnitude, 98 nH and four fixed value capacitors and one tunable capacitor that allowed to achieve the desired precession frequency,f r = 298 M H z . The model was tested for three differentf o values of 269 MHz, 275 MHz and 286 MHz. The mutual coupling and the eigenfrequencies were compared through bench testing and dispersion equation. The experimental data were in good agreement (< 5%) with the theoretical eigenfrequencies from the dispersion relation. The theoretical eigenfrequencies and the experimental eigenfrequencies are in good agreement for eigenmodes (1,2), (1,3), (2,2), (2,3) and (4,3).
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Affiliation(s)
- Shadeeb Hossain
- Department of Radiology, Weill Cornell Medicine, NY 10021, USA
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Garcia-Garcia B, Mattern H, Vockert N, Yakupov R, Schreiber F, Spallazzi M, Perosa V, Haghikia A, Speck O, Düzel E, Maass A, Schreiber S. Vessel Distance Mapping: A novel methodology for assessing vascular-induced cognitive resilience. Neuroimage 2023; 274:120094. [PMID: 37028734 DOI: 10.1016/j.neuroimage.2023.120094] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 03/30/2023] [Accepted: 04/04/2023] [Indexed: 04/09/2023] Open
Abstract
The association between cerebral blood supply and cognition has been widely discussed in the recent literature. One focus of this discussion has been the anatomical variability of the circle of Willis, with morphological differences being present in more than half of the general population. While previous studies have attempted to classify these differences and explore their contribution to hippocampal blood supply and cognition, results have been controversial. To disentangle these previously inconsistent findings, we introduce Vessel Distance Mapping (VDM) as a novel methodology for evaluating blood supply, which allows for obtaining vessel pattern metrics with respect to the surrounding structures, extending the previously established binary classification into a continuous spectrum. To accomplish this, we manually segmented hippocampal vessels obtained from high-resolution 7T time-of-flight MR angiographic imaging in older adults with and without cerebral small vessel disease, generating vessel distance maps by computing the distances of each voxel to its nearest vessel. Greater values of VDM-metrics, which reflected higher vessel distances, were associated with poorer cognitive outcomes in subjects affected by vascular pathology, while this relation was not observed in healthy controls. Therefore, a mixed contribution of vessel pattern and vessel density is proposed to confer cognitive resilience, consistent with previous research findings. In conclusion, VDM provides a novel platform, based on a statistically robust and quantitative method of vascular mapping, for addressing a variety of clinical research questions.
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Affiliation(s)
| | - Hendrik Mattern
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Biomedical Magnetic Resonance, Otto-von-Guericke-University Magdeburg, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany
| | - Niklas Vockert
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany
| | - Renat Yakupov
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - Frank Schreiber
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Department of Neurology, Otto-von-Guericke University, 39120, Magdeburg, Germany
| | - Marco Spallazzi
- Department of Medicine and Surgery, Unit of Neurology, Azienda Ospedalierouniversitaria, 43126 Parma, Italy
| | - Valentina Perosa
- Department of Neurology, Otto-von-Guericke University, 39120, Magdeburg, Germany; J. Philip Kistler Stroke Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Aiden Haghikia
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany; Department of Neurology, Otto-von-Guericke University, 39120, Magdeburg, Germany
| | - Oliver Speck
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Biomedical Magnetic Resonance, Otto-von-Guericke-University Magdeburg, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany; Leibniz Institute for Neurobiology, 39118 Magdeburg, Germany
| | - Emrah Düzel
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany; Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University, 39120 Magdeburg, Germany; Department of Neurology, Otto-von-Guericke University, 39120, Magdeburg, Germany; Institute of Cognitive Neuroscience, University College London, London WCIN 3AZ, UK
| | - Anne Maass
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany
| | - Stefanie Schreiber
- German Center for Neurodegenerative Diseases, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), 39106 Magdeburg, Germany; Department of Neurology, Otto-von-Guericke University, 39120, Magdeburg, Germany
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de Godoy LL, Studart-Neto A, de Paula DR, Green N, Halder A, Arantes P, Chaim KT, Moraes NC, Yassuda MS, Nitrini R, Dresler M, da Costa Leite C, Panovska-Griffiths J, Soddu A, Bisdas S. Phenotyping Superagers Using Resting-State fMRI. AJNR Am J Neuroradiol 2023; 44:424-433. [PMID: 36927760 PMCID: PMC10084893 DOI: 10.3174/ajnr.a7820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 02/19/2023] [Indexed: 03/18/2023]
Abstract
BACKGROUND AND PURPOSE Superagers are defined as older adults with episodic memory performance similar or superior to that in middle-aged adults. This study aimed to investigate the key differences in discriminative networks and their main nodes between superagers and cognitively average elderly controls. In addition, we sought to explore differences in sensitivity in detecting these functional activities across the networks at 3T and 7T MR imaging fields. MATERIALS AND METHODS Fifty-five subjects 80 years of age or older were screened using a detailed neuropsychological protocol, and 31 participants, comprising 14 superagers and 17 cognitively average elderly controls, were included for analysis. Participants underwent resting-state-fMRI at 3T and 7T MR imaging. A prediction classification algorithm using a penalized regression model on the measurements of the network was used to calculate the probabilities of a healthy older adult being a superager. Additionally, ORs quantified the influence of each node across preselected networks. RESULTS The key networks that differentiated superagers and elderly controls were the default mode, salience, and language networks. The most discriminative nodes (ORs > 1) in superagers encompassed areas in the precuneus posterior cingulate cortex, prefrontal cortex, temporoparietal junction, temporal pole, extrastriate superior cortex, and insula. The prediction classification model for being a superager showed better performance using the 7T compared with 3T resting-state-fMRI data set. CONCLUSIONS Our findings suggest that the functional connectivity in the default mode, salience, and language networks can provide potential imaging biomarkers for predicting superagers. The 7T field holds promise for the most appropriate study setting to accurately detect the functional connectivity patterns in superagers.
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Affiliation(s)
- L L de Godoy
- From the Departments of Radiology and Oncology (L.L.d.G., P.A., K.T.C., C.d.C.L.)
- Lysholm Department of Neuroradiology (L.L.d.G., S.B.), The National Hospital of Neurology and Neurosurgery
| | - A Studart-Neto
- Neurology (A.S.-N., N.C.M., M.S.Y., R.N.), Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - D R de Paula
- Donders Institute for Brain Cognition and Behavior (D.R.d.P., M.D.), Radboud University Medical Centre, Nijmegen, the Netherlands
| | - N Green
- Department of Statistics (N.G.), University College London, London, UK
| | - A Halder
- Departments of Medical Biophysics (A.H.)
| | - P Arantes
- From the Departments of Radiology and Oncology (L.L.d.G., P.A., K.T.C., C.d.C.L.)
| | - K T Chaim
- From the Departments of Radiology and Oncology (L.L.d.G., P.A., K.T.C., C.d.C.L.)
| | - N C Moraes
- Neurology (A.S.-N., N.C.M., M.S.Y., R.N.), Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - M S Yassuda
- Neurology (A.S.-N., N.C.M., M.S.Y., R.N.), Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - R Nitrini
- Neurology (A.S.-N., N.C.M., M.S.Y., R.N.), Hospital das Clinicas, Faculdade de Medicina da Universidade de Sao Paulo, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - M Dresler
- Donders Institute for Brain Cognition and Behavior (D.R.d.P., M.D.), Radboud University Medical Centre, Nijmegen, the Netherlands
| | - C da Costa Leite
- From the Departments of Radiology and Oncology (L.L.d.G., P.A., K.T.C., C.d.C.L.)
| | - J Panovska-Griffiths
- The Big Data Institute and the Pandemic Sciences Institute (J.P.-G.)
- The Queen's College (J.P.-G.), University of Oxford, Oxford, UK
| | - A Soddu
- Physics and Astronomy (A.S.), University of Western Ontario, London, Ontario, Canada
| | - S Bisdas
- Lysholm Department of Neuroradiology (L.L.d.G., S.B.), The National Hospital of Neurology and Neurosurgery
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Kaya B, Geha P, de Araujo I, Cioffi I, Moayedi M. Identification of central amygdala and trigeminal motor nucleus connectivity in humans: An ultra-high field diffusion MRI study. Hum Brain Mapp 2023; 44:1309-1319. [PMID: 36217737 PMCID: PMC9921240 DOI: 10.1002/hbm.26104] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 09/12/2022] [Accepted: 09/20/2022] [Indexed: 01/11/2023] Open
Abstract
The neuroanatomical circuitry of jaw muscles has been mostly explored in non-human animals. A recent rodent study revealed a novel circuit from the central amygdala (CeA) to the trigeminal motor nucleus (5M), which controls biting attacks. This circuit has yet to be delineated in humans. Ultra-high diffusion-weighted imaging data from the Human Connectome Project (HCP) allow in vivo delineation of circuits identified in other species-for example, the CeA-5M pathway-in humans. We hypothesized that the CeA-5M circuit could be resolved in humans at both 7 and 3 T. We performed probabilistic tractography between the CeA and 5M in 30 healthy young adults from the HCP database. As a negative control, we performed tractography between the basolateral amygdala (BLAT) and 5M, as CeA is the only amygdalar nucleus with extensive projections to the brainstem. Connectivity strength was operationalized as the number of streamlines between each region of interest. Connectivity strength between CeA-5M and BLAT-5M within each hemisphere was compared, and CeA-5M circuit had significantly stronger connectivity than the BLAT-5M circuit, bilaterally at both 7 T (all p < .001) and 3 T (all p < .001). This study is the first to delineate the CeA-5M circuit in humans.
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Affiliation(s)
- Batu Kaya
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain ResearchUniversity of TorontoTorontoOntarioCanada
- University of Toronto Centre for the Study of PainTorontoOntarioCanada
| | - Paul Geha
- Department of Psychiatry, School of Medicine and DentistryUniversity of RochesterRochesterNew YorkUSA
- The Del Monte Institute of NeuroscienceRochesterNew YorkUSA
| | - Ivan de Araujo
- Nash Family Department of NeuroscienceIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Iacopo Cioffi
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain ResearchUniversity of TorontoTorontoOntarioCanada
- University of Toronto Centre for the Study of PainTorontoOntarioCanada
- Department of DentistryMount Sinai HospitalTorontoOntarioCanada
| | - Massieh Moayedi
- Faculty of Dentistry, Centre for Multimodal Sensorimotor and Pain ResearchUniversity of TorontoTorontoOntarioCanada
- University of Toronto Centre for the Study of PainTorontoOntarioCanada
- Department of DentistryMount Sinai HospitalTorontoOntarioCanada
- Clinical & Computational Neuroscience, Krembil Research InstituteUniversity Health NetworkTorontoOntarioCanada
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Future Prospects of Positron Emission Tomography–Magnetic Resonance Imaging Hybrid Systems and Applications in Psychiatric Disorders. Pharmaceuticals (Basel) 2022; 15:ph15050583. [PMID: 35631409 PMCID: PMC9147426 DOI: 10.3390/ph15050583] [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: 02/25/2022] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 12/15/2022] Open
Abstract
A positron emission tomography (PET)–magnetic resonance imaging (MRI) hybrid system has been developed to improve the accuracy of molecular imaging with structural imaging. However, the mismatch in spatial resolution between the two systems hinders the use of the hybrid system. As the magnetic field of the MRI increased up to 7.0 tesla in the commercial system, the performance of the MRI system largely improved. Several technical attempts in terms of the detector and the software used with the PET were made to improve the performance. As a result, the high resolution of the PET–MRI fusion system enables quantitation of metabolism and molecular information in the small substructures of the brainstem, hippocampus, and thalamus. Many studies on psychiatric disorders, which are difficult to diagnose with medical imaging, have been accomplished using various radioligands, but only a few studies have been conducted using the PET–MRI fusion system. To increase the clinical usefulness of medical imaging in psychiatric disorders, a high-resolution PET–MRI fusion system can play a key role by providing important information on both molecular and structural aspects in the fine structures of the brain. The development of high-resolution PET–MR systems and their potential roles in clinical studies of psychiatric disorders were reviewed as prospective views in future diagnostics.
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Varela C, Valdés R, Rojas A, Soffia P. Principles of magnetic resonance imaging (MRI). Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00101-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Altinok DCA, Rajkumar R, Nießen D, Sbaihat H, Kersey M, Shah NJ, Veselinović T, Neuner I. Common neurobiological correlates of resilience and personality traits within the triple resting-state brain networks assessed by 7-Tesla ultra-high field MRI. Sci Rep 2021; 11:11564. [PMID: 34079001 PMCID: PMC8172832 DOI: 10.1038/s41598-021-91056-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 05/10/2021] [Indexed: 11/28/2022] Open
Abstract
Despite numerous studies investigating resilience and personality trials, a paucity of information regarding their neurobiological commonalities at the level of the large resting-state networks (rsNWs) remains. Here we address this topic using the advantages of ultra-high-field (UHF) 7T-MRI, characterized by higher signal-to-noise ratio and increased sensitivity. The association between resilience, personality traits and three fMRI measures (fractional amplitude of low-frequency fluctuations (fALFF), degree centrality (DC) and regional homogeneity (ReHo)) determined for three core rsNWs (default mode (DMN), salience (SN), and central executive network (CEN)) were examined in 32 healthy volunteers. The investigation revealed a significant role of SN in both resilience and personality traits and a tight association of the DMN with resilience. DC in CEN emerged as a significant moderator for the correlations of resilience with the personality traits of neuroticism and extraversion. Our results indicate that the common neurobiological basis of resilience and the Big Five personality traits may be reflected at the level of the core rsNWs.
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Affiliation(s)
- Dilsa Cemre Akkoc Altinok
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Ravichandran Rajkumar
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
- JARA - BRAIN - Translational Medicine, Pauwelsstraße 30, 52074, Aachen, Germany
- Institute of Neuroscience and Medicine, INM-4, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - Dominik Nießen
- Institute of Neuroscience and Medicine, INM-4, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - Hasan Sbaihat
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
- Institute of Neuroscience and Medicine, INM-4, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
- Department of Medical Imaging, Arab-American University Palestine, AAUP, Jenin, Palestine
| | - Margo Kersey
- Department of Mathematics, University of California, Los Angeles, CA, 90095, USA
| | - N Jon Shah
- JARA - BRAIN - Translational Medicine, Pauwelsstraße 30, 52074, Aachen, Germany
- Institute of Neuroscience and Medicine, INM-4, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
- Institute of Neuroscience and Medicine 11, INM-11, JARA, Forschungszentrum Jülich, Jülich, Germany
- Department of Neurology, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Tanja Veselinović
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Irene Neuner
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
- JARA - BRAIN - Translational Medicine, Pauwelsstraße 30, 52074, Aachen, Germany.
- Institute of Neuroscience and Medicine, INM-4, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428, Jülich, Germany.
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