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Dual Energy CT: Applications in Head and Neck and Neurologic Imaging, An Issue of Neuroimaging Clinics of North America, E-Book

Dual Energy CT: Applications in Head and Neck and Neurologic Imaging, An Issue of Neuroimaging Clinics of North America, E-Book

Reza Forghani | Hillary R. Kelly

(2017)

Additional Information

Abstract

This issue of Neuroimaging Clinics of North America focuses on Dual Energy CT: Applications in Neurologic, Head and Neck Imaging, and is edited by Drs. Reza Forghani and Hillary R. Kelly. Articles will include: Dual Energy CT: Physical Principles and Approaches to Scanning, Part 1; Dual Energy CT: Physical Principles and Approaches to Scanning, Part 2; Dual Energy CT Applications for Differentiation of Intracranial Hemorrhage, Calcium, and Iodine; Dual Energy CT Angiography of the Head and Neck and Related Applications; Miscellaneous and Emerging Applications of Dual Energy CT for the Evaluation of Intracranial Pathology; Applications of Dual Energy CT for the Evaluation of Head and Neck Squamous Cell Carcinoma; Dual Energy CT Applications for the Evaluation of Cervical Lymphadenopathy; Miscellaneous and Emerging Applications of Dual Energy CT for the Evaluation of Pathologies in the Head and Neck; Dual Energy CT Applications for the Evaluation of the Spine; Applications of Dual Energy CT for Artifact Reduction in the Head, Neck, and Spine; Advanced Tissue Characterization and Texture Analysis using Dual Energy CT: Horizons and Emerging Applications; and more!

Table of Contents

Section Title Page Action Price
Front Cover Cover
Dual Energy CT:Applications in Headand Neck andNeurologic Imaging\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
November 2017 v
February 2018 v
May 2018 v
RECENT ISSUES v
May 2017 v
February 2017 v
November 2016 v
Contributors vii
CONSULTING EDITOR vii
EDITORS vii
AUTHORS vii
Contents xi
Foreword: Dual-Energy Computed Tomography: Applications in Neurologic, Head, and Neck Imaging xi
Preface: Dual-Energy Computed Tomography in Neuroradiology and Head and Neck Imaging: State-of-the-Art xi
Dual-Energy Computed Tomography: Physical Principles, Approaches to Scanning, Usage, and Implementation: Part 1 xi
Dual-Energy Computed Tomography: Physical Principles, Approaches to Scanning, Usage, and Implementation: Part 2 xi
Dual-Energy Computed Tomographic Applications for Differentiation of Intracranial Hemorrhage, Calcium, and Iodine xi
Miscellaneous and Emerging Applications of Dual-Energy Computed Tomography for the Evaluation of Intracranial Pathology xii
Dual-Energy Computed Tomography Angiography of the Head and Neck and Related Applications xii
Applications of Dual-Energy Computed Tomography for the Evaluation of Head and Neck Squamous Cell Carcinoma xii
Dual-Energy Computed Tomography Applications for the Evaluation of Cervical Lymphadenopathy xii
Miscellaneous and Emerging Applications of Dual-Energy Computed Tomography for the Evaluation of Pathologies in the Head an ... xiii
Dual Energy Computed Tomography Applications for the Evaluation of the Spine xiii
Applications of Dual-Energy Computed Tomography for Artifact Reduction in the Head, Neck, and Spine xiii
Dual-Energy Computed Tomography of the Neck: A Pictorial Review of Normal Anatomy, Variants, and Pathologic Entities Using ... xiii
Routine Dual-Energy Computed Tomography Scanning of the Neck in Clinical Practice: A Single-Institution Experience xiv
Advanced Tissue Characterization and Texture Analysis Using Dual-Energy Computed Tomography: Horizons and Emerging Applications xiv
Foreword:\rDual-Energy Computed Tomography: Applications in Neurologic, Head, and Neck Imaging xv
Preface:\rDual-Energy Computed Tomography in Neuroradiology and Head and Neck Imaging: State-of-the-Art xvii
Dual-Energy Computed Tomography 371
Key points 371
INTRODUCTION 371
FUNDAMENTAL PRINCIPLES OF SPECTRAL COMPUTED TOMOGRAPHIC SCANNING AND MATERIAL CHARACTERIZATION 372
Overview 372
Fundamentals of Dual-Energy Computed Tomography Scanning: Factors Related to the Scanner 372
Fundamentals of Dual-Energy Computed Tomography Scanning: Factors Related to the Materials or Tissues Being Evaluated 373
OVERVIEW OF CURRENT AND EMERGING DUAL-ENERGY COMPUTED TOMOGRAPHIC SYSTEMS 375
Dual-Source Dual-Energy Computed Tomography 375
Single-Source Dual-Energy Computed Tomography with Rapid kVp Switching: Gemstone Spectral Imaging 376
Layered Detector Dual-Energy Computed Tomography 377
Single-Source Dual-Energy Computed Tomography with Beam Filtration at the Source: TwinBeam Dual-Energy Computed Tomography 378
Dual-Energy Computed Tomographic Scanning Using Sequential Acquisitions 378
Emerging Spectral Computed Tomographic Systems 380
SUMMARY 383
REFERENCES 383
Dual-Energy Computed Tomography 385
Key points 385
DUAL-ENERGY COMPUTED TOMOGRAPHY IMPLEMENTATION AND USAGE IN CLINICAL PRACTICE: PRACTICAL CONSIDERATIONS 385
Different Modes of Acquisition with Current Dual-Energy Computed Tomography Scanners and Implications 385
Radiation Dose and Image Quality 386
Temporal Resolution 388
Standard and Advanced Dual-Energy Computed Tomography Reconstructions and Basis Material Decomposition 388
Virtual monochromatic images 388
Weighted average images 391
Basis material decomposition, labeling, and maps 391
Basis material decomposition 391
Multimaterial decomposition and material labeling 393
Virtual unenhanced or virtual noncontrast images and iodine maps 394
Workflow and Other Practical Considerations 397
SUMMARY 398
REFERENCES 399
Dual-Energy Computed Tomographic Applications for Differentiation of Intracranial Hemorrhage, Calcium, and Iodine 401
Key points 401
INTRODUCTION 401
MATERIAL DECOMPOSITION PRINCIPLES 401
DUAL-ENERGY COMPUTED TOMOGRAPHIC IMAGE POSTPROCESSING 402
DIFFERENTIATION OF HEMORRHAGE AND CALCIFICATION 402
PITFALLS OF MATERIAL DECOMPOSITION IN THE PRESENCE OF ARTIFACT 405
DIFFERENTIATION OF IODINE AND HEMORRHAGE 405
SUMMARY 407
REFERENCES 409
Miscellaneous and Emerging Applications of Dual-Energy Computed Tomography for the Evaluation of Intracranial Pathology 411
Key points 411
INTRODUCTION 411
TECHNICAL CONSIDERATION FOR DUAL-ENERGY COMPUTED TOMOGRAPHY 412
VIRTUAL MONOCHROMATIC IMAGING 412
Optimal Virtual Monochromatic Imaging Energy Level for Noncontrast Brain Imaging 412
Optimal Virtual Monochromatic Imaging Energy Level for Contrast-Enhanced Brain Imaging (Best Contrast-to-Noise Ratio) 414
Artifact Reduction 416
MATERIAL SEPARATION USING DUAL-ENERGY COMPUTED TOMOGRAPHY 417
Differentiation Between Iodine-Enhanced Tumor and Calcification 417
Bone Removal or Bone Subtraction Imaging 420
Iodine Distribution Map 420
Imaging Assessment of Tumor Extent into the Bone Marrow Space 422
EMERGING APPLICATIONS OF DUAL-ENERGY COMPUTED TOMOGRAPHY: FUTURE DEVELOPMENTS AND CHALLENGES 424
SUMMARY 425
ACKNOWLEDGMENTS 425
REFERENCES 426
Dual-Energy Computed Tomography Angiography of the Head and Neck and Related Applications 429
Key points 429
INTRODUCTION 429
FUNDAMENTAL PRINCIPLES OF DUAL-ENERGY COMPUTED TOMOGRAPHY ACQUISITION, MATERIAL CHARACTERIZATION, AND POSTPROCESSING 430
Dual-Energy Computed Tomography Acquisition and Material Characterization 430
Dual-Energy Computed Tomography Postprocessing 430
Calculation of effective atomic number 430
Material decomposition 431
Virtual monochromatic image reconstruction 431
DUAL-ENERGY COMPUTED TOMOGRAPHY BONE AND CALCIUM REMOVAL FOR NEUROVASCULAR COMPUTED TOMOGRAPHY ANGIOGRAPHY 431
Aneurysm Detection and Morphologic Visualization 432
Evaluation of Atherosclerotic Arterial Stenosis 433
Computed Tomography Venography 433
CLINICAL USE OF VIRTUAL MONOCHROMATIC IMAGES 434
Accentuation of Iodine Contrast Enhancement 434
Metal Artifact Reduction 435
ICA–PLAQUE EVALUATION: CA++ PLAQUE REMOVAL, IMPROVING RESIDUAL LUMINAL MEASUREMENT ACCURACY, AND REDUCING BLOOMING FROM CON ... 436
ROLE OF VIRTUAL NONCONTRAST IMAGING IN INTRACRANIAL HEMORRHAGE 436
Hemorrhage versus Leaked Iodine 436
Intracranial Hemorrhage: Detection of Spot Sign or Underlying Lesion 437
Opportunity for Radiation Dose Reduction: Reality? 439
LIMITATIONS 439
SUMMARY 440
REFERENCES 440
Applications of Dual-Energy Computed Tomography for the Evaluation of Head and Neck Squamous Cell Carcinoma 445
Key points 445
INTRODUCTION 445
BASIC PRINCIPLES UNDERLYING DUAL-ENERGY COMPUTED TOMOGRAPHY MATERIAL CHARACTERIZATION 446
OVERVIEW OF DUAL-ENERGY COMPUTED TOMOGRAPHY RECONSTRUCTIONS AND OPTIMAL RECONSTRUCTIONS FOR ROUTINE EVALUATION OF THE NECK 446
Virtual Monochromatic Images 447
Weighted Average Images 447
Material Decomposition Maps 448
DUAL-ENERGY COMPUTED TOMOGRAPHY APPLICATIONS FOR THE EVALUATION OF HEAD AND NECK SQUAMOUS CELL CARCINOMA 448
Tumor Visibility and Soft Tissue Contrast 449
Evaluation of Thyroid Cartilage and Cartilage Invasion 452
Other Potential and Emerging Dual-Energy Computed Tomography Applications for the Evaluation of Head and Neck Squamous Cell ... 453
Multiparametric Dual-Energy Computed Tomography Approach for Head and Neck Squamous Cell Carcinoma Evaluation 456
SUMMARY 457
REFERENCES 457
Dual-Energy Computed Tomography Applications for the Evaluation of Cervical Lymphadenopathy 461
Key points 461
INTRODUCTION 461
CONVENTIONAL COMPUTED TOMOGRAPHY IMAGING OF CERVICAL LYMPH NODES 462
DUAL-ENERGY COMPUTED TOMOGRAPHY SCANNING OF CERVICAL LYMPH NODES 462
Virtual Noncontrast Images 462
Blended Images 463
Virtual Monochromatic Images 463
Iodine Map and Iodine Quantification 463
Spectral Hounsfield Unit Attenuation Curves 466
SUMMARY 467
REFERENCES 467
Miscellaneous and Emerging Applications of Dual-Energy Computed Tomography for the Evaluation of Pathologies in the Head an ... 469
Key points 469
INTRODUCTION 469
BASIC PRINCIPLES OF DUAL-ENERGY COMPUTED TOMOGRAPHY 469
DUAL-ENERGY COMPUTED TOMOGRAPHY POSTPROCESSING 471
Linear Blending 471
Nonlinear Blending 471
MISCELLANEOUS AND EMERGING DUAL-ENERGY COMPUTED TOMOGRAPHY CLINICAL APPLICATIONS 472
Material-Specific Applications 472
Oncologic applications 472
Vascular 473
Skeletal 475
Virtual unenhanced imaging 476
Energy-specific Applications 476
Virtual monoenergetic image 476
Virtual monoenergetic image 477
Oncologic 477
Vascular 478
Artifact reduction 478
SUMMARY 479
REFERENCES 480
Dual Energy Computed Tomography Applications for the Evaluation of the Spine 483
Key points 483
INTRODUCTION 483
BONE MINERAL DENSITY IMAGING 483
BONE MARROW IMAGING 484
POSTOPERATIVE SPINE 484
URATE DEPOSITION IMAGING 485
SUMMARY 486
REFERENCES 486
Applications of Dual-Energy Computed Tomography for Artifact Reduction in the Head, Neck, and Spine 489
Key points 489
INTRODUCTION 489
PRINCIPLES AND STRATEGIES FOR ARTIFACT REDUCTION 490
Virtual Monochromatic Series 490
Material Decomposition 490
ARTIFACT-REDUCTION STRATEGIES 490
BEAM HARDENING 491
Posterior Fossa 491
Aneurysm Coils and Clips 491
Dental Amalgam/Implants 492
Spine Hardware 492
Dense Iodinated Contrast and Osseous Structures 493
SUMMARY 496
REFERENCES 496
Dual-Energy Computed Tomography of the Neck 499
Key points 499
INTRODUCTION 499
OVERVIEW OF DIFFERENT DUAL-ENERGY COMPUTED TOMOGRAPHY RECONSTRUCTIONS 500
NORMAL HEAD AND NECK ANATOMY ON DUAL-ENERGY COMPUTED TOMOGRAPHY 501
HEAD AND NECK LESIONS AND VARIANTS ON DUAL-ENERGY COMPUTED TOMOGRAPHY 505
Inflammatory and Infectious Diseases 505
Benign Neck Lesions and Variants 505
Parathyroid adenoma 505
Vallecular cyst 505
Ranula 505
Thyroglossal duct cyst 507
Thornwaldt cyst 507
Laryngocele 507
Branchial cleft cyst 508
Lipoma 508
Herniation of the sublingual gland through a mylohyoid boutonnière 509
Salivary Gland Tumors 510
Thyroid Carcinoma 511
Lymphoma 511
Head and Neck Squamous Cell Carcinoma 513
Recurrent Head and Neck Squamous Cell Carcinoma and Post-treatment Changes 518
Perineural Spread of Tumor 518
ARTIFACT REDUCTION 519
SUMMARY 520
REFERENCES 520
Routine Dual-Energy Computed Tomography Scanning of the Neck in Clinical Practice 523
Key points 523
INTRODUCTION 523
PROSPECTIVE SCAN ACQUISITION IN DUAL-ENERGY COMPUTED TOMOGRAPHY MODE 524
DUAL-ENERGY COMPUTED TOMOGRAPHY SCAN SELECTION ALGORITHMS 524
COMPUTED TOMOGRAPHY DEPARTMENT PRODUCTIVITY AND TECHNOLOGIST WORKFLOW 525
Initial Scan Organization and Scheduling 525
Computed Tomography Technologist Training and Engagement 526
Preset Dual-Energy Computed Tomography Protocols, Generation of Different Dual-Energy Computed Tomography Reconstructions, ... 526
Overview of Scan Acquisition and Processing Times for Neck Computed Tomography Scans 527
Spectral Image Datasets 527
DUAL-ENERGY COMPUTED TOMOGRAPHY SCAN INTERPRETATION: RADIOLOGIST WORKFLOW 528
Automatically Generated Advanced Dual-Energy Computed Tomography Reconstructions and Tailored Evaluation Using Advanced Dua ... 528
Advanced Dual-Energy Computed Tomography Postprocessing Software 530
Overview of the Use of Specialized Low-Energy Neck Reconstructions Available Through the Picture Archiving and Communicatio ... 530
SUMMARY 530
REFERENCES 531
Advanced Tissue Characterization and Texture Analysis Using Dual-Energy Computed Tomography 533
Key points 533
INTRODUCTION 533
BASIC PRINCIPLES OF MATERIAL CHARACTERIZATION IN DUAL-ENERGY COMPUTED TOMOGRAPHY SCANNING 534
DUAL-ENERGY COMPUTED TOMOGRAPHY POSTPROCESSING: QUANTITATIVE ANALYSIS AND DIFFERENT DUAL-ENERGY COMPUTED TOMOGRAPHY RECONST ... 535
Spectral Hounsfield Unit Attenuation Curves and Virtual Monochromatic Images 536
Basis Material Decomposition Maps and Material Labeling 536
OTHER DUAL-ENERGY COMPUTED TOMOGRAPHY ANALYTICAL TOOLS OR RECONSTRUCTIONS 541
ADVANCED QUANTITATIVE APPROACHES FOR THE EVALUATION OF SPECTRAL DATA 542
TEXTURE OR RADIOMIC ANALYSIS USING SPECTRAL DATA 542
Preparation of Dual-Energy Computed Tomography Data for Texture Analysis 543
Mathematical Texture Data Analysis and Application of Machine Learning Methods for Generation of Prediction Models 543
SUMMARY 544
REFERENCES 545