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  1. Book ; Online: Numerical Solution and Applications of Fractional Differential Equations

    Feng, Libo / Liu, Yang / Liu, Lin

    2023  

    Keywords Research & information: general ; Mathematics & science ; fractional calculus ; numerical methods ; numerical analysis ; fractional differential equations
    Language English
    Size 1 electronic resource (546 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel
    Document type Book ; Online
    Note English
    HBZ-ID HT030646144
    ISBN 9783036592992 ; 3036592997
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Live-view 4D GRASP MRI: A framework for robust real-time respiratory motion tracking with a sub-second imaging latency.

    Feng, Li

    Magnetic resonance in medicine

    2023  Volume 90, Issue 3, Page(s) 1053–1068

    Abstract: Purpose: To propose a framework called live-view golden-angle radial sparse parallel (GRASP) MRI for low-latency and high-fidelity real-time volumetric MRI.: Methods: Live-view GRASP MRI has two stages. The first one is called an off-view stage and ... ...

    Abstract Purpose: To propose a framework called live-view golden-angle radial sparse parallel (GRASP) MRI for low-latency and high-fidelity real-time volumetric MRI.
    Methods: Live-view GRASP MRI has two stages. The first one is called an off-view stage and the second one is called a live-view stage. In the off-view stage, 3D k-space data and 2D navigators are acquired alternatively using a new navi-stack-of-stars sampling scheme. A 4D motion database is then generated that contains time-resolved MR images at a sub-second temporal resolution, and each image is linked to a 2D navigator. In the live-view stage, only 2D navigators are acquired. At each time point, a live-view 2D navigator is matched to all the off-view 2D navigators. A 3D image that is linked to the best-matched off-view 2D navigator is then selected for this time point. This framework places the typical acquisition and reconstruction burden of MRI in the off-view stage, enabling low-latency real-time 3D imaging in the live-view stage. The accuracy of live-view GRASP MRI and the robustness of 2D navigators for characterizing respiratory variations and/or body movements were assessed.
    Results: Live-view GRASP MRI can efficiently generate real-time volumetric images that match well with the ground-truth references, with an imaging latency below 500 ms. Compared to 1D navigators, 2D navigators enable more reliable characterization of respiratory variations and/or body movements that may occur throughout the two imaging stages.
    Conclusion: Live-view GRASP MRI represents a novel, accurate, and robust framework for real-time volumetric imaging, which can potentially be applied for motion adaptive radiotherapy on MRI-Linac.
    MeSH term(s) Respiration ; Magnetic Resonance Imaging/methods ; Motion ; Imaging, Three-Dimensional/methods ; Movement
    Language English
    Publishing date 2023-05-19
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 605774-3
    ISSN 1522-2594 ; 0740-3194
    ISSN (online) 1522-2594
    ISSN 0740-3194
    DOI 10.1002/mrm.29700
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1959: Show issues Location:
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  3. Article ; Online: Golden-Angle Radial MRI: Basics, Advances, and Applications.

    Feng, Li

    Journal of magnetic resonance imaging : JMRI

    2022  Volume 56, Issue 1, Page(s) 45–62

    Abstract: In recent years, golden-angle radial sampling has received substantial attention and interest in the magnetic resonance imaging (MRI) community, and it has become a popular sampling trajectory for both research and clinical use. However, although the ... ...

    Abstract In recent years, golden-angle radial sampling has received substantial attention and interest in the magnetic resonance imaging (MRI) community, and it has become a popular sampling trajectory for both research and clinical use. However, although the number of relevant techniques and publications has grown rapidly, there is still a lack of a review paper that provides a comprehensive overview and summary of the basics of golden-angle rotation, the advantages and challenges/limitations of golden-angle radial sampling, and recommendations in using different types of golden-angle radial trajectories for MRI applications. Such a review paper is expected to be helpful both for clinicians who are interested in learning the potential benefits of golden-angle radial sampling and for MRI physicists who are interested in exploring this research direction. The main purpose of this review paper is thus to present an overview and summary about golden-angle radial MRI sampling. The review consists of three sections. The first section aims to answer basic questions such as: what is a golden angle; how is the golden angle calculated; why is golden-angle radial sampling useful, and what are its limitations. The second section aims to review more advanced trajectories of golden-angle radial sampling, including tiny golden-angle rotation, stack-of-stars golden-angle radial sampling, and three-dimensional (3D) kooshball golden-angle radial sampling. Their respective advantages and limitations and potential solutions to address these limitations are also discussed. Finally, the third section reviews MRI applications that can benefit from golden-angle radial sampling and provides recommendations to readers who are interested in implementing golden-angle radial trajectories in their MRI studies. EVIDENCE LEVEL: 5 TECHNICAL EFFICACY: Stage 1.
    MeSH term(s) Artifacts ; Contrast Media ; Humans ; Imaging, Three-Dimensional/methods ; Magnetic Resonance Imaging/methods
    Chemical Substances Contrast Media
    Language English
    Publishing date 2022-04-09
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, N.I.H., Extramural
    ZDB-ID 1146614-5
    ISSN 1522-2586 ; 1053-1807
    ISSN (online) 1522-2586
    ISSN 1053-1807
    DOI 10.1002/jmri.28187
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 3648: Show issues Location:
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    Zs.MO 236: Show issues

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  4. Article ; Online: 4D Golden-Angle Radial MRI at Subsecond Temporal Resolution.

    Feng, Li

    NMR in biomedicine

    2022  Volume 36, Issue 2, Page(s) e4844

    Abstract: Intraframe motion blurring, as a major challenge in free-breathing dynamic MRI, can be reduced if high temporal resolution can be achieved. To address this challenge, this work proposes a highly accelerated 4D (3D + time) dynamic MRI framework with ... ...

    Abstract Intraframe motion blurring, as a major challenge in free-breathing dynamic MRI, can be reduced if high temporal resolution can be achieved. To address this challenge, this work proposes a highly accelerated 4D (3D + time) dynamic MRI framework with subsecond temporal resolution that does not require explicit motion compensation. The method combines standard stack-of-stars golden-angle radial sampling and tailored GRASP-Pro (Golden-angle RAdial Sparse Parallel imaging with imProved performance) reconstruction. Specifically, 4D dynamic MRI acquisition is performed continuously without motion gating or sorting. The k-space centers in stack-of-stars radial data are organized to guide estimation of a temporal basis, with which GRASP-Pro reconstruction is employed to enforce joint low-rank subspace and sparsity constraints. This new basis estimation strategy is the new feature proposed for subspace-based reconstruction in this work to achieve high temporal resolution (e.g., subsecond/3D volume). It does not require sequence modification to acquire additional navigation data, it is compatible with commercially available stack-of-stars sequences, and it does not need an intermediate reconstruction step. The proposed 4D dynamic MRI approach was tested in abdominal motion phantom, free-breathing abdominal MRI, and dynamic contrast-enhanced MRI (DCE-MRI). Our results have shown that GRASP-Pro reconstruction with the new basis estimation strategy enables highly-accelerated 4D dynamic imaging at subsecond temporal resolution (with five spokes or less for each dynamic frame per image slice) for both free-breathing non-DCE-MRI and DCE-MRI. In the abdominal phantom, better image quality with lower root mean square error and higher structural similarity index was achieved using GRASP-Pro compared with standard GRASP. With the ability to acquire each 3D image in less than 1 s, intraframe respiratory blurring can be intrinsically reduced for body applications with our approach, which eliminates the need for explicit motion detection and motion compensation.
    MeSH term(s) Contrast Media/chemistry ; Respiration ; Magnetic Resonance Imaging/methods ; Imaging, Three-Dimensional/methods ; Abdomen
    Chemical Substances Contrast Media
    Language English
    Publishing date 2022-11-25
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1000976-0
    ISSN 1099-1492 ; 0952-3480
    ISSN (online) 1099-1492
    ISSN 0952-3480
    DOI 10.1002/nbm.4844
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 2869: Show issues Location:
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  5. Article: [Ultrasound-guided percutaneous thermal ablation assisted by artificial ascites and soft tissue edema in the treatment of special-region hepatic tumors].

    Feng, L / Wang, Y / Niu, L J

    Zhonghua zhong liu za zhi [Chinese journal of oncology

    2024  Volume 46, Issue 2, Page(s) 155–160

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Humans ; Ascites/etiology ; Retrospective Studies ; Catheter Ablation/methods ; Liver Neoplasms/diagnostic imaging ; Liver Neoplasms/surgery ; Liver Neoplasms/etiology ; Ultrasonography, Interventional ; Water ; Edema/etiology ; Edema/surgery ; Treatment Outcome ; Carcinoma, Hepatocellular/pathology
    Chemical Substances Water (059QF0KO0R)
    Language Chinese
    Publishing date 2024-02-28
    Publishing country China
    Document type English Abstract ; Journal Article
    ZDB-ID 603424-x
    ISSN 0253-3766
    ISSN 0253-3766
    DOI 10.3760/cma.j.cn112152-20231026-00269
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.MO 321: Show issues

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  6. Article ; Online: Letter to the editor: Responses. Long-Term Tea Consumption and Depressive and Anxiety Symptoms in Elderly.

    Feng, L

    The journal of prevention of Alzheimer's disease

    2018  Volume 5, Issue 1, Page(s) 87

    MeSH term(s) Anxiety ; Depression ; Diet ; Healthy Aging ; Tea
    Chemical Substances Tea
    Language English
    Publishing date 2018-02-06
    Publishing country Switzerland
    Document type Journal Article ; Comment
    ZDB-ID 2782183-3
    ISSN 2426-0266 ; 2274-5807
    ISSN (online) 2426-0266
    ISSN 2274-5807
    DOI 10.14283/jpad.2018.4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Squamous Cell Carcinoma Arising From Discoid Lupus Erythematosus.

    Yu, Yin / Feng, Lin

    Journal of cutaneous medicine and surgery

    2024  , Page(s) 12034754231225958

    Language English
    Publishing date 2024-02-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1361720-5
    ISSN 1615-7109 ; 1203-4754
    ISSN (online) 1615-7109
    ISSN 1203-4754
    DOI 10.1177/12034754231225958
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Squamous Cell Carcinoma Arising From Epidermodysplasia Verruciformis.

    Hou, Huimin / Feng, Lin

    Journal of cutaneous medicine and surgery

    2024  , Page(s) 12034754231225959

    Language English
    Publishing date 2024-02-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1361720-5
    ISSN 1615-7109 ; 1203-4754
    ISSN (online) 1615-7109
    ISSN 1203-4754
    DOI 10.1177/12034754231225959
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Editorial: Reviews in behavioral and lifestyle interventions for healthy aging: 2022.

    Narimatsu, Hiroto / Feng, Lei

    Frontiers in public health

    2024  Volume 12, Page(s) 1354881

    MeSH term(s) Healthy Aging ; Communication
    Language English
    Publishing date 2024-02-05
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2711781-9
    ISSN 2296-2565 ; 2296-2565
    ISSN (online) 2296-2565
    ISSN 2296-2565
    DOI 10.3389/fpubh.2024.1354881
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: The role of neurovascular coupling dysfunction in cognitive decline of diabetes patients.

    Feng, Lin / Gao, Ling

    Frontiers in neuroscience

    2024  Volume 18, Page(s) 1375908

    Abstract: Neurovascular coupling (NVC) is an important mechanism to ensure adequate blood supply to active neurons in the brain. NVC damage can lead to chronic impairment of neuronal function. Diabetes is characterized by high blood sugar and is considered an ... ...

    Abstract Neurovascular coupling (NVC) is an important mechanism to ensure adequate blood supply to active neurons in the brain. NVC damage can lead to chronic impairment of neuronal function. Diabetes is characterized by high blood sugar and is considered an important risk factor for cognitive impairment. In this review, we provide fMRI evidence of NVC damage in diabetic patients with cognitive decline. Combined with the exploration of the major mechanisms and signaling pathways of NVC, we discuss the effects of chronic hyperglycemia on the cellular structure of NVC signaling, including key receptors, ion channels, and intercellular connections. Studying these diabetes-related changes in cell structure will help us understand the underlying causes behind diabetes-induced NVC damage and early cognitive decline, ultimately helping to identify the most effective drug targets for treatment.
    Language English
    Publishing date 2024-03-21
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2411902-7
    ISSN 1662-453X ; 1662-4548
    ISSN (online) 1662-453X
    ISSN 1662-4548
    DOI 10.3389/fnins.2024.1375908
    Database MEDical Literature Analysis and Retrieval System OnLINE

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