Rad Tech's Guide to MRI: Basic Physics, Instrumentation, and Quality Control

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William H. Faulkner, Jr. (University of Pennsylvania Heal Systems, Philadelphia) Euclid Seeram (British Columbia Institute of Technology Medical Imaging, School of Health Sciences, Canada)

Rad Tech's Guide to MRI

Basic Physics, Instrumentation, and Quality Control

William H. Faulkner, Jr. (University of Pennsylvania Heal Systems, Philadelphia), Euclid Seeram (British Columbia Institute of Technology Medical Imaging, School of Health Sciences, Canada)

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English

Wiley-Blackwell
30 August 2019

Nuclear medicine; Radiology; Imaging systems & technology

Series: Rad Tech's Guides'

The second edition of Rad Tech's Guide to MRI provides practicing and training technologists with a succinct overview of magnetic resonance imaging (MRI). Designed for quick reference and examination preparation, this pocket-size guide covers the fundamental principles of electromagnetism, MRI equipment, data acquisition and processing, image quality and artifacts, MR Angiography, Diffusion/Perfusion, and more.

Written by an expert practitioner and educator, this handy reference guide:

Provides essential MRI knowledge in a single portable, easy-to-read guide Covers instrumentation and MRI hardware components, including gradient and radio-frequency subsystems Provides techniques to handle flow imaging issues and improve the quality of MRIs Explains the essential physics underpinning MRI technology

Rad Tech's Guide to MRI is a must-have resource for student radiographers, especially those preparing for the American Registry of Radiation Technologist (ARRT) exams, as well as practicing radiology technologists looking for a quick reference guide.

By: William H. Faulkner Jr. (University of Pennsylvania Heal Systems Philadelphia)
Series edited by: Euclid Seeram (British Columbia Institute of Technology Medical Imaging School of Health Sciences Canada)
Imprint: Wiley-Blackwell
Country of Publication: United Kingdom
Edition: 2nd edition
Dimensions: Height: 213mm, Width: 140mm, Spine: 10mm
Weight: 204g
ISBN: 9781119508571
ISBN 10: 1119508576
Series: Rad Tech's Guides'
Pages: 144
Publication Date: 30 August 2019
Audience: College/higher education , Primary
Format: Paperback
Publisher's Status: Active

1. Hardware Overview 1 Instrumentation: Magnets 1 Instrumentation: RF Subsystem 6 Instrumentation: Gradient Subsystem 8 2. Fundamental Principles 11 Electromagnetism: Faraday’s Law of Induction 11 Magnetism 12 Behavior of Hydrogen in a Magnetic Field 14 3. Production of Magnetic Resonance Signal 19 4. Relaxation and Tissue Characteristics 23 T2-Relaxation 23 T1-Relaxation 24 Proton Density 24 T2* (Pronounced “T2 star”) 25 5. Data Acquisition and Image Formation 27 Pulse Sequences 27 Image Contrast Control 30 Image Formation 42 Data Acquisition 43 Scan Time 50 Controlling Image Quality with FSE 57 6. Magnetic Resonance Image Quality 61 Spatial Resolution 61 Signal-to-Noise Ratio (SNR) 63 7. Artifacts 75 Chemical Shift (Water and Fat in Different Voxels) 75 Chemical Shift (Water and Fat in the Same Voxel) 77 Magnetic Susceptibility 79 Motion and Flow 81 Spatial Presaturation 82 Gradient Moment Nulling (Flow Compensation) 84 Compensation for Respiration 84 Cardiac Compensation 86 Aperiodic Motion 88 Aliasing 89 Gibbs and Truncation Artifact 91 Radio-Frequency Artifacts 92 Gradient Malfunctions 93 Image Shading 93 Inadequate System Tuning 94 Reconstruction Artifacts 94 8. Flow Imaging 97 Flow Patterns 97 Magnetic Resonance Angiography (Non Contrast) 98 Reduction of Flow Artifacts 102 Signal Loss in MRA 102 Two-Dimensional and Three-Dimensional Time-of-Flight 103 Signal Loss with Two-Dimensional TOF 104 Three-Dimensional TOF 106 Signal Loss with Three-Dimensional TOF 108 PC Techniques 109 Contrast Enhanced MRA (CE-MRA) 113 9. Diffusion and Perfusion Imaging 117 Diffusion-Weighted Imaging (DWI) 117 10. Gadolinium-Based Contrast Agents 125 Characteristics, Composition and Structure 125 Index 129

William H. Faulkner, Jr. is a radiologic technologist and MRI education and operations consultant with William Faulkner and Associates. He is a founding board member of the American Board of Magnetic Resonance Safety (ABMRS) and author and co-author of several books on magnetic resonance imaging and computed tomography including the Handbook of MRI Technique and Review Questions for MRI.