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  1. Article ; Online: The design and evaluation of single-channel loopole coils at 7T MRI.

    Zheng, Mengxuan / Gao, Yang / Quan, Zhiyan / Zhang, Xiaotong

    Physics in medicine and biology

    2022  Volume 67, Issue 19

    Abstract: ... ...

    Abstract Objective
    MeSH term(s) Animals ; Equipment Design ; Haplorhini ; Magnetic Resonance Imaging/methods ; Phantoms, Imaging ; Radio Waves
    Language English
    Publishing date 2022-09-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208857-5
    ISSN 1361-6560 ; 0031-9155
    ISSN (online) 1361-6560
    ISSN 0031-9155
    DOI 10.1088/1361-6560/ac8fdf
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    Zs.A 199: Show issues Location:
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  2. Article ; Online: A double-tuned

    Quan, Zhiyan / Yang, Zhaoxia / Tang, Xiaocui / Fu, Caixia / Zhou, Xiaoyue / Huang, Lu / Xia, Liming / Zhang, Xiaotong

    NMR in biomedicine

    2023  Volume 37, Issue 2, Page(s) e5049

    Abstract: Magnetic resonance imaging (MRI)/magnetic resonance spectroscopy (MRS) employing proton nuclear resonance has emerged as a pivotal modality in clinical diagnostics and fundamental research. Nonetheless, the scope of MRI/MRS extends beyond protons, ... ...

    Abstract Magnetic resonance imaging (MRI)/magnetic resonance spectroscopy (MRS) employing proton nuclear resonance has emerged as a pivotal modality in clinical diagnostics and fundamental research. Nonetheless, the scope of MRI/MRS extends beyond protons, encompassing nonproton nuclei that offer enhanced metabolic insights. A notable example is phosphorus-31 (
    MeSH term(s) Animals ; Rabbits ; Magnetic Resonance Imaging/methods ; Protons ; Equipment Design ; Magnetic Resonance Spectroscopy/methods ; Diabetes Mellitus ; Phantoms, Imaging
    Chemical Substances Protons
    Language English
    Publishing date 2023-09-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 1000976-0
    ISSN 1099-1492 ; 0952-3480
    ISSN (online) 1099-1492
    ISSN 0952-3480
    DOI 10.1002/nbm.5049
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    Zs.A 2869: Show issues Location:
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  3. Article ; Online: A proton birdcage coil integrated with interchangeable single loops for multi-nuclear MRI/MRS.

    Zhang, Yi / Quan, Zhiyan / Lou, Feiyang / Fang, Yujiao / Thompson, Garth J / Chen, Gao / Zhang, Xiaotong

    Journal of Zhejiang University. Science. B

    2022  Volume 25, Issue 2, Page(s) 168–180

    Abstract: Energy metabolism is fundamental for life. It encompasses the utilization of carbohydrates, lipids, and proteins for internal processes, while aberrant energy metabolism is implicated in many diseases. In the present study, using three-dimensional (3D) ... ...

    Title translation 一种用于多核磁共振成像及波谱的鸟笼线圈与可更换单环线圈的一体化设计.
    Abstract Energy metabolism is fundamental for life. It encompasses the utilization of carbohydrates, lipids, and proteins for internal processes, while aberrant energy metabolism is implicated in many diseases. In the present study, using three-dimensional (3D) printing from polycarbonate via fused deposition modeling, we propose a multi-nuclear radiofrequency (RF) coil design with integrated
    MeSH term(s) Animals ; Protons ; Magnetic Resonance Imaging/methods ; Magnetic Resonance Spectroscopy ; Phantoms, Imaging ; Signal-To-Noise Ratio ; Equipment Design
    Chemical Substances Protons
    Language Chinese
    Publishing date 2022-12-29
    Publishing country China
    Document type Journal Article
    ZDB-ID 2247290-3
    ISSN 1862-1783 ; 1673-1581
    ISSN (online) 1862-1783
    ISSN 1673-1581
    DOI 10.1631/jzus.B2300587
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  4. Article ; Online: Design and application of a multimodality-compatible 1Tx/6Rx RF coil for monkey brain MRI at 7T.

    Qu, Shuxian / Shi, Sunhang / Quan, Zhiyan / Gao, Yang / Wang, Minmin / Wang, Yueming / Pan, Gang / Lai, Hsin-Yi / Roe, Anna Wang / Zhang, Xiaotong

    NeuroImage

    2023  Volume 276, Page(s) 120185

    Abstract: Objective: Blood-oxygen-level-dependent functional MRI allows to investigte neural activities and connectivity. While the non-human primate plays an essential role in neuroscience research, multimodal methods combining functional MRI with other ... ...

    Abstract Objective: Blood-oxygen-level-dependent functional MRI allows to investigte neural activities and connectivity. While the non-human primate plays an essential role in neuroscience research, multimodal methods combining functional MRI with other neuroimaging and neuromodulation enable us to understand the brain network at multiple scales.
    Approach: In this study, a tight-fitting helmet-shape receive array with a single transmit loop for anesthetized macaque brain MRI at 7T was fabricated with four openings constructed in the coil housing to accommodate multimodal devices, and the coil performance was quantitatively evaluated and compared to a commercial knee coil. In addition, experiments over three macaques with infrared neural stimulation (INS), focused ultrasound stimulation (FUS), and transcranial direct current stimulation (tDCS) were conducted.
    Main results: The RF coil showed higher transmit efficiency, comparable homogeneity, improved SNR and enlarged signal coverage over the macaque brain. Infrared neural stimulation was applied to the amygdala in deep brain region, and activations in stimulation sites and connected sites were detected, with the connectivity consistent with anatomical information. Focused ultrasound stimulation was applied to the left visual cortex, and activations were acquired along the ultrasound traveling path, with all time course curves consistent with pre-designed paradigms. The existence of transcranial direct current stimulation electrodes brought no interference to the RF system, as evidenced through high-resolution MPRAGE structure images.
    Significance: This pilot study reveals the feasibility for brain investigation at multiple spatiotemporal scales, which may advance our understanding in dynamic brain networks.
    MeSH term(s) Animals ; Haplorhini ; Pilot Projects ; Transcranial Direct Current Stimulation ; Magnetic Resonance Imaging ; Neuroimaging ; Brain/diagnostic imaging ; Macaca ; Equipment Design ; Phantoms, Imaging ; Radio Waves ; Signal-To-Noise Ratio
    Language English
    Publishing date 2023-05-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1147767-2
    ISSN 1095-9572 ; 1053-8119
    ISSN (online) 1095-9572
    ISSN 1053-8119
    DOI 10.1016/j.neuroimage.2023.120185
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    Zs.A 3664: Show issues Location:
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  5. Article ; Online: A 16-channel loop array for in vivo macaque whole-brain imaging at 7 T.

    Lou, Feiyang / Tang, Xiaocui / Quan, Zhiyan / Qian, Meizhen / Wang, Jianbao / Qu, Shuxian / Gao, Yang / Wang, Yueming / Pan, Gang / Lai, Hsin-Yi / Roe, Anna Wang / Zhang, Xiaotong

    Magnetic resonance imaging

    2023  Volume 102, Page(s) 179–183

    Abstract: Combining multimodal approaches with functional magnetic resonance imaging (fMRI) has catapulted the research on brain circuitries of non-human primates (NHPs) into a new era. However, many studies are constrained by a lack of appropriate RF coils. In ... ...

    Abstract Combining multimodal approaches with functional magnetic resonance imaging (fMRI) has catapulted the research on brain circuitries of non-human primates (NHPs) into a new era. However, many studies are constrained by a lack of appropriate RF coils. In this study, a single loop transmit and 16-channel receive array coil was constructed for brain imaging of macaques at 7 Tesla (7 T). The 16 receive channels were mounted on a 3D-printed helmet-shaped form closely fitting the macaque head, with fourteen openings arranged for multimodal devices around the cortical regions. Coil performance was evaluated by quantifying and comparing signal-to-noise ratio (SNR) maps, noise correlations, g-factor maps and flip-angle maps with a 28-channel commercial knee coil. The in vivo results suggested that the macaque coil has higher SNR in cortical regions and better acceleration ability in parallel imaging, which may benefit revealing mesoscale organizations in the brain.
    MeSH term(s) Animals ; Macaca ; Brain/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Head ; Signal-To-Noise Ratio ; Neuroimaging/methods ; Phantoms, Imaging ; Equipment Design
    Language English
    Publishing date 2023-06-23
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604885-7
    ISSN 1873-5894 ; 0730-725X
    ISSN (online) 1873-5894
    ISSN 0730-725X
    DOI 10.1016/j.mri.2023.06.014
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    Zs.A 1817: Show issues Location:
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  6. Article ; Online: A 16-channel loop array for in vivo macaque whole-brain imaging at 3 T.

    Quan, Zhiyan / Gao, Yang / Qu, Shuxian / Wang, Xiaojie / Friedman, Robert M / Chernov, Mykyta M / Kroenke, Christopher D / Roe, Anna Wang / Zhang, Xiaotong

    Magnetic resonance imaging

    2020  Volume 68, Page(s) 167–172

    Abstract: Non-human primates (NHPs) are vital models for neuroscience research. These animals have been widely used in behavioral, electrophysiological, molecular, and more recently, multimodal neuroimaging and neuro-engineering studies. Several RF coil arrays ... ...

    Abstract Non-human primates (NHPs) are vital models for neuroscience research. These animals have been widely used in behavioral, electrophysiological, molecular, and more recently, multimodal neuroimaging and neuro-engineering studies. Several RF coil arrays have been designed for functional, high-resolution brain magnetic resonance imaging (MRI), but few have been designed to accommodate multimodal devices. In the present study, a 16-channel array coil was constructed for brain imaging of macaques at 3 Tesla (3 T). To construct this coil, a close-fitting helmet-shaped form was designed to host 16 coil loops for whole-brain coverage. This assembly is mountable onto stereotaxic head frame bars, and the coil functions while the monkey is in the sphinx position with a clear line of vision of stimuli presented from outside of the MRI system. In addition, 4 openings were allocated in the coil housing, allowing multimodal devices to directly access visual cortical regions such as V1-V4 and MT. Coil performance was evaluated in an anesthetized macaque by quantifying and comparing signal-to-noise ratios (SNRs), noise correlations, and g-factor maps to a vendor-supplied human pediatric coil frequently used for NHP MRI. The result from in vivo experiments showed that the NHP coil was well-decoupled, had higher SNRs in cortical regions, and improved data acquisition acceleration capability compared with a vendor-supplied human pediatric coil that has been frequently used in macaque MRI studies. Furthermore, whole-brain anatomic imaging, diffusion tensor imaging and functional brain imaging have also been conducted: the details of brain anatomical structure, such as cerebellum and brainstem, can be clearly visualized in T2-SPACE images; b0 SNR calculated from b0 maps was higher than the human pediatric coil in all regions of interest (ROIs); the time-course SNR (tSNR) map calculated for GRE-EPI images demonstrates that the presented coil can be used for high-resolution functional imaging at 3 T.
    MeSH term(s) Acceleration ; Algorithms ; Animals ; Anisotropy ; Brain/diagnostic imaging ; Brain Stem/diagnostic imaging ; Diffusion Tensor Imaging ; Haplorhini ; Head ; Imaging, Three-Dimensional ; Macaca ; Magnetic Resonance Imaging ; Male ; Neuroimaging ; Radio Waves ; Signal-To-Noise Ratio ; Visual Cortex/diagnostic imaging
    Language English
    Publishing date 2020-02-17
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604885-7
    ISSN 1873-5894 ; 0730-725X
    ISSN (online) 1873-5894
    ISSN 0730-725X
    DOI 10.1016/j.mri.2020.02.008
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  7. Article ; Online: A 16-Channel Dense Array for In Vivo Animal Cortical MRI/fMRI on 7T Human Scanners.

    Zhang, Xiaotong / Zhang, Jialu / Gao, Yang / Qian, Meizhen / Qu, Shuxian / Quan, Zhiyan / Yu, Miao / Chen, Xiaoming / Wang, Yueming / Pan, Gang / Adriany, Gregor / Roe, Anna Wang

    IEEE transactions on bio-medical engineering

    2021  Volume 68, Issue 5, Page(s) 1611–1618

    Abstract: Objective: The purpose of the present study was to fabricate a novel RF coil exclusively for visualizing submillimeter tissue structure and probing neuronal activity in cerebral cortex over anesthetized and awake animals on 7T human scanners.: Methods! ...

    Abstract Objective: The purpose of the present study was to fabricate a novel RF coil exclusively for visualizing submillimeter tissue structure and probing neuronal activity in cerebral cortex over anesthetized and awake animals on 7T human scanners.
    Methods: A novel RF coil design has been proposed for visualizing submillimeter tissue structure and probing neuronal activity in cerebral cortex over anesthetized and awake animals on 7T human scanners: a local transmit coil was utilized to save space for auxiliary device installation; 16 receive-only loops were densely arranged over a 5 cm-diameter circular area, with a diameter of 1.3 cm for each loop.
    Results: In anesthetized macaque experiments, 60 μm T
    Conclusion: The promising brain imaging results along with flexibility in various size use of the presented design can be an effective and maneuverable solution to take one step close towards mesoscale cortical-related imaging.
    Significance: High-spatial-resolution brain imaging over large animals by using ultra-high-field (UHF) MRI will be helpful to understand and reveal functional brain organizations and the underlying mechanism in diseases.
    MeSH term(s) Animals ; Brain ; Cats ; Cerebral Cortex/diagnostic imaging ; Humans ; Macaca ; Magnetic Resonance Imaging ; Radio Waves
    Language English
    Publishing date 2021-04-21
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 160429-6
    ISSN 1558-2531 ; 0018-9294
    ISSN (online) 1558-2531
    ISSN 0018-9294
    DOI 10.1109/TBME.2020.3027296
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