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Functional Connectivity, An Issue of Neuroimaging Clinics of North America, E-Book

Functional Connectivity, An Issue of Neuroimaging Clinics of North America, E-Book

Jay J. Pillai

(2017)

Additional Information

Abstract

This issue of Neuroimaging Clinics of North America focuses on Functional Connectivity, and is edited by Dr. Jay Pillai. Articles will include: Applications of rs-fMRI to presurgical mapping: sensorimotor mapping; Dynamic functional connectivity methods; Machine learning applications to rs-fMRI analysis; Frequency domain analysis of rs-fMRI; Applications of rs-fMRI to epilepsy; Data-driven analysis methods for rs-fMRI; Applications of rs-fMRI to presurgical mapping: language mapping; Limitations of rs-fMRI in the setting of focal brain lesions; Applications of rs-fMRI to neuropsychiatric disease; Applications of rs-fMRI to Traumatic Brain Injury; Applications of rs-fMRI to neurodegenerative disease; Graph theoretic analysis of rs-fMRI; and more!

Table of Contents

Section Title Page Action Price
Front Cover Cover
Functional Connectivity\r i
Copyright\r ii
CME Accreditation Page iii
PROGRAM OBJECTIVE iii
TARGET AUDIENCE iii
LEARNING OBJECTIVES iii
ACCREDITATION iii
DISCLOSURE OF CONFLICTS OF INTEREST iii
UNAPPROVED/OFF-LABEL USE DISCLOSURE iii
TO ENROLL iv
METHOD OF PARTICIPATION iv
CME INQUIRIES/SPECIAL NEEDS iv
NEUROIMAGING CLINICS OF NORTH AMERICA\r v
FORTHCOMING ISSUES v
February 2018 v
May 2018 v
August 2018 v
RECENT ISSUES v
August 2017 v
May 2017 v
February 2017 v
Contributors vii
CONSULTING EDITOR vii
EDITOR vii
AUTHORS vii
Contents xi
Foreword: Functional Connectivity xi
Preface: Functional Connectivity xi
1: Methods of Resting State Functional Connectivity (fMRI) Analysis xi
Methods and Considerations for Dynamic Analysis of Functional MR Imaging Data547 xi
Ten Key Observations on the Analysis of Resting-state Functional MR Imaging Data Using Independent Component Analysis561 xi
A Review of Resting-State Analysis Methods581 xi
Graph Theoretic Analysis of Resting State Functional MR Imaging593 xi
Machine Learning Applications to Resting-State Functional MR Imaging Analysis609 xii
2: Clinical Applications of Resting State Functional Connectivity xii
Resting-state Functional Magnetic Resonance Imaging in Presurgical Functional Mapping: Sensorimotor Localization621 xii
Application of Resting State Functional MR Imaging to Presurgical Mapping: Language Mapping635 xii
Limitations of Resting-State Functional MR Imaging in the Setting of Focal Brain Lesions645 xiii
Applications of Resting-State Functional Connectivity to Neurodegenerative Disease663 xiii
Applications of Resting State Functional MR Imaging to Traumatic Brain Injury685 xiii
Applications of Resting-State Functional MR Imaging to Epilepsy697 xiii
Applications of Resting State Functional MR Imaging to Neuropsychiatric Diseases709 xiv
Foreword\r xv
Functional Connectivity xv
Preface\r xvii
Functional Connectivity xvii
Methods and Considerations for Dynamic Analysis of Functional MR Imaging Data 547
Key points 547
INTRODUCTION 547
METHODS FOR DYNAMIC FUNCTIONAL CONNECTIVITY ANALYSIS 548
Sliding Window Analysis (Temporal Resolution of Seconds to Minutes) 548
Time-Frequency Analysis (Multiscale Temporal Resolution) 549
Point Process Analysis (Toward the Resolution of a Single fMR Imaging Timeframe) 550
Temporal Graph Analysis 550
SUMMARIZING BRAIN DYNAMICS 551
Temporal Clustering 551
The Independence Assumption 551
Detecting Functional Connectivity Change Points 552
Incorporating Temporal Sequence Information 552
STATISTICAL TESTING 553
CONSIDERATIONS 553
Determination of Sources Contributing to Dynamic Functional Connectivity 553
Vigilance levels 553
Changes in signal amplitude, autocorrelation, and noise characteristics 554
Physiologic processes 554
Hemodynamic Confounds 555
Issues with Short Acquisitions 555
SUMMARY 555
ACKNOWLEDGMENTS 555
REFERENCES 556
Ten Key Observations on the Analysis of Resting-state Functional MR Imaging Data Using Independent Component Analysis 561
Key points 561
INTRODUCTION 561
THE BASICS OF INDEPENDENT COMPONENT ANALYSIS APPLIED TO FUNCTIONAL MAGNETIC RESONANCE IMAGING DATA 562
NUMBER 1: INDEPENDENT COMPONENT ANALYSIS APPROACHES ARE ROBUST TO ARTIFACTS 564
NUMBER 2: INDEPENDENT COMPONENT ANALYSIS IS AGNOSTIC TO THE TEMPORAL EVOLUTION OF BRAIN ACTIVITY SIGNALS 564
NUMBER 3: INDEPENDENT COMPONENT ANALYSIS COMPONENTS CAN BE COUPLED TO ONE ANOTHER SPATIALLY AND TEMPORALLY 564
NUMBER 4: INDEPENDENT COMPONENT ANALYSIS MAY BE DATA DRIVEN BUT IT IS ALSO USEFUL FOR HYPOTHESIS-BASED STUDIES 566
Assumptions of Independent Component Analysis 567
NUMBER 5: THERE IS NO PERFECT NUMBER OF COMPONENTS 568
NUMBER 6: INDEPENDENT COMPONENT ANALYSIS RESULTS ARE ROBUST TO FALSE-POSITIVES AND SPATIAL AUTOCORRELATION ASSUMPTIONS COMP ... 568
NUMBER 7: THE MANTRA OF “GARBAGE IN GARBAGE OUT” RINGS TRUE, BUT WITH INDEPENDENT COMPONENT ANALYSIS ONE PERSON’S GARBAGE M ... 569
NUMBER 8: LABELING THE INDEPENDENT COMPONENT ANALYSIS COMPONENTS IS STILL LARGELY MANUAL, BUT AUTOMATION APPROACHES CONTINU ... 570
NUMBER 9: INDEPENDENT COMPONENT ANALYSIS CAN BE LEVERAGED TO CAPTURE DYNAMIC (TIME-VARYING) FUNCTIONAL CONNECTIVITY 572
NUMBER 10: INDEPENDENT COMPONENT ANALYSIS ALGORITHM DEVELOPMENT IS ONGOING 574
SUMMARY 575
ACKNOWLEDGMENTS 575
REFERENCES 575
A Review of Resting-State Analysis Methods 581
Key points 581
INTRODUCTION 581
METHODS 582
Temporal Domain Methods 583
Seed-based correlation 583
Regional homogeneity 583
Four-dimensional consistency of local neural activities 583
Principle component analysis 583
Independent components analysis 584
Frequency Domain Methods 584
Coherence analysis 584
Amplitude of low-frequency fluctuation or fractional amplitude of low-frequency fluctuation 584
Time-Frequency Domain Methods 585
Short-time Fourier transform 585
Wavelet transform coherence 585
Single-Subject Analysis 585
GROUP-LEVEL ANALYSIS 585
Regression Analysis 585
Dual Regression 586
Graph Theory 586
RESULTS 586
Healthy Subjects 586
Diseased Populations 587
Alzheimer Disease 587
Schizophrenia 588
DISCUSSION 589
REFERENCES 591
Graph Theoretic Analysis of Resting State Functional MR Imaging 593
Key points 593
INTRODUCTION 593
DATA COLLECTION AND PREPROCESSING 594
GRAPH THEORETIC ANALYSIS OF RESTING STATE FUNCTIONAL MR IMAGING DATA 594
GRAPHS IN RESTING STATE FUNCTIONAL MR IMAGING ANALYSIS 594
MICROSCALE, MESOSCALE, AND MACROSCALE NETWORK ANALYSIS 595
Microscale 595
Mesoscale 597
Macroscale 597
MAJOR FINDINGS IN RESTING STATE FUNCTIONAL MR IMAGING GRAPH THEORETIC ANALYSIS 599
Not All Resting State Functional MR Imaging Is Equal 599
Human Brain Organization Maintains a Complex Balance Among Randomness, Small Worldness, and Modularity 600
Resting State Networks form a Stable Organization Supporting Cognitive Function Within and Between Individuals 600
Resting State Network Graph Characteristics Are Altered in Numerous Clinical Populations 601
OPEN FRONTIERS IN RESTING STATE FUNCTIONAL MR IMAGING ANALYSIS 602
WHAT DOES RESTING STATE FUNCTIONAL MR IMAGING GRAPH ORGANIZATION REPRESENT? 602
OPTIMISM FOR CLINICAL IDENTIFICATION, PREDICTION, AND TRANSLATION 602
SUMMARY 604
REFERENCES 604
Machine Learning Applications to Resting-State Functional MR Imaging Analysis 609
Key points 609
INTRODUCTION 609
MACHINE LEARNING OVERVIEW 610
Support Vector Machines 610
Random Forests 611
Artificial Neural Networks 611
CLINICAL APPLICATIONS USING MACHINE LEARNING AND RESTING STATE FUNCTIONAL MR IMAGING 611
Mild Cognitive Impairment and Alzheimer's Dementia 611
Traumatic Brain Injury 614
Epilepsy 614
Schizophrenia 614
Bipolar Disorder 615
Social Anxiety 615
Major Depressive Disorder 616
Attention Deficit Hyperactivity Disorder 616
Autism Spectrum Disorder 617
Addiction 618
Aging 618
ACKNOWLEDGMENTS 618
REFERENCES 618
Resting-state Functional Magnetic Resonance Imaging in Presurgical Functional Mapping 621
Key points 621
INTRODUCTION 622
METHODS 622
Patients 622
Acquisition 622
Preprocessing 622
Resting-state functional magnetic resonance imaging 622
Task functional magnetic resonance imaging processing 624
Anatomic Regions 624
Brodmann Primary Sensorimotor Region of Interest 624
FreeSurfer Primary Sensorimotor Region of Interest 624
Jaccard Index Overlap 626
Task Threshold 626
Multilayer Perceptron Threshold 626
Hemisphere Masks 626
RESULTS 626
Fixed Multilayer Perceptron Threshold 626
Maximum Jaccard Index Multilayer Perceptron Threshold 626
DISCUSSION 627
SUMMARY 631
REFERENCES 631
Application of Resting State Functional MR Imaging to Presurgical Mapping 635
Key points 635
BACKGROUND 635
CONSIDERATIONS DURING RESTING STATE FUNCTIONAL MR IMAGING ACQUISITION 636
IMAGE PROCESSING 636
CONNECTIVITY ANALYSIS 636
RELIABILITY OF RESTING STATE FUNCTIONAL MR IMAGING METRICS 638
RELIABILITY OF RESTING STATE FUNCTIONAL MR IMAGING LANGUAGE NETWORK IN HEALTHY SUBJECTS 638
RESTING STATE FUNCTIONAL MR IMAGING IN PREOPERATIVE PLANNING: LANGUAGE LOCALIZATION 639
RESTING STATE FUNCTIONAL MR IMAGING IN PREOPERATIVE PLANNING: LANGUAGE LATERALIZATION 641
NEUROVASCULAR UNCOUPLING 641
MULTILINGUAL SUBJECTS 641
LANGUAGE PREDICTION 641
CHILDREN 642
SUMMARY 642
REFERENCES 642
Limitations of Resting-State Functional MR Imaging in the Setting of Focal Brain Lesions 645
Key points 645
INTRODUCTION 645
SUSCEPTIBILITY EFFECTS 646
HEAD MOTION AND PHYSIOLOGIC NOISE 646
NEUROVASCULAR UNCOUPLING 647
EXAMPLES OF EACH OF THE PREVIOUSLY MENTIONED LIMITATIONS IN THE SETTING OF FOCAL BRAIN PATHOLOGY 649
NEUROVASCULAR UNCOUPLING EFFECTS ON RESTING-STATE FUNCTIONAL CONNECTIVITY (SEED CORRELATION ANALYSIS AND INDEPENDENT COMPON ... 650
NEUROVASCULAR UNCOUPLING EFFECTS ON REGIONAL HOMOGENEITY (KENDALL COEFFICIENT OF CONCORDANCE AND COHERENCE TO EVALUATE) 654
NEUROVASCULAR UNCOUPLING EFFECTS ON FREQUENCY-DOMAIN METRICS (AMPLITUDE OF LOW-FREQUENCY FLUCTUATIONS AND FRACTIONAL AMPLIT ... 656
NEUROVASCULAR UNCOUPLING EFFECTS ON MAPPING OF THE LANGUAGE NETWORK 656
NEUROVASCULAR UNCOUPLING IN THE CONTEXT OF NETWORK/GRAPH THEORETIC ANALYSIS 656
SUMMARY 658
REFERENCES 658
Applications of Resting-State Functional Connectivity to Neurodegenerative Disease 663
Key points 663
INTRODUCTION 663
MAPPING BRAIN CIRCUITS: RESTING-STATE FUNCTIONAL MAGNETIC RESONANCE IMAGING 664
CAN RESTING-STATE FUNCTIONAL MR IMAGING–BASED CONNECTIVITY ANALYSES REVEAL SYNDROME-SPECIFIC NETWORK CHANGES? 666
CAN RESTING-STATE FUNCTIONAL MR IMAGING–BASED CONNECTIVITY ANALYSES UNCOVER DISEASE MECHANISM AND THE UNDERLYING NEUROPATHO ... 668
CAN RESTING-STATE FUNCTIONAL MR IMAGING–BASED CONNECTIVITY ANALYSES DETECT EARLY CHANGES AND TRACK DISEASE SEVERITY? 674
SUMMARY AND FUTURE DIRECTIONS 676
REFERENCES 677
Applications of Resting State Functional MR Imaging to Traumatic Brain Injury 685
Key points 685
INTRODUCTION 685
NORMAL ANATOMY AND IMAGING TECHNIQUE 686
RESTING STATE FUNCTIONAL MR IMAGING PROTOCOLS 687
RESTING STATE FUNCTIONAL MR IMAGING FINDINGS 688
Graph Theoretic Measures 689
Mounting Evidence for Connectivity Changes in Traumatic Brain Injury 689
Evidence for Hypoconnectivity in Traumatic Brain Injury 689
Evidence for Hyperconnectivity in Traumatic Brain Injury 690
Automating Diagnosis with Machine Learning 691
Longitudinal Recovery Monitoring and Outcome Prediction 691
MAGNETOENCEPHALOGRAPHY PROTOCOLS 692
Acquisition 692
Reconstruction Techniques 692
MAGNETOENCEPHALOGRAPHY FINDINGS 692
Frequency Domain 692
Automating Diagnosis with Machine Learning 693
PEARLS, PITFALLS, VARIANTS 693
DISCUSSION 694
REFERENCES 694
Applications of Resting-State Functional MR Imaging to Epilepsy 697
Key points 697
WHAT CAN FUNCTIONAL MR IMAGING ADD TO EPILEPSY SURGICAL EVALUATIONS? 697
RESTING-STATE FUNCTIONAL MR IMAGING AND MEMORY IN MEDIAL TEMPORAL-LOBE EPILEPSY 698
RESTING-STATE FUNCTIONAL CONNECTIVITY AND LANGUAGE IN MEDIAL TEMPORAL-LOBE EPILEPSY 701
RESTING-STATE FUNCTIONAL MR IMAGING AND OTHER CLINICAL QUESTIONS IN EPILEPSY 702
POSSIBILITIES AND LIMITATIONS 703
SUMMARY 704
REFERENCES 705
Applications of Resting State Functional MR Imaging to Neuropsychiatric Diseases 709
Key points 709
INTRODUCTION 709
ALZHEIMER DISEASE AND ITS PRECURSOR, AMNESTIC MILD COGNITIVE IMPAIRMENT 713
PARKINSON DISEASE 715
COMA 715
PSYCHOTIC ILLNESSES INCLUDING PSYCHOTIC BIPOLAR DISORDER 715
Novel Analyses 716
ACUTE DRUG INTOXICATION 718
CHRONIC DRUG AND ALCOHOL ABUSE 718
REFERENCES 718