Handbook of Small Animal MRI

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Handbook of Small Animal MRI will help you make the most of one of the greatest advancements in veterinary practice in recent years, magnetic resonance imaging. Those using the services of mobile scanners dedicated to veterinary use, as well as those in practices with their own MRI machine, will benefit from this book. It provides a clear and comprehensive account of how this important diagnostic tool works. In addition this easy reference handbook provides guidance on the interpretation of images of common clinical conditions. The book includes: • An overview of the basic principles, explaining exactly how and why MRI works and how images are produced • Easy-to-understand diagrams to explain the theory of MRI • Safety procedures • A Glossary of terms • Over 100 annotated images of MRI scans to aid diagnosis • An additional atlas of normal anatomy for MRI interpretation Written by two pioneering experts in the field with a combined experience of over 20,000 MRI studies of veterinary patients. Suitable for small animal veterinarians and veterinary students. Ian Elliott trained as a Radiographer and first became involved with MRI in late 1980s. He has worked exclusively in MRI since 1991 and, following an extensive spell scanning human patients, helped pioneer the use of the technique in veterinary practice. Ian has been involved exclusively in veterinary MRI since 2000 and has scanned many thousands of cases during this time. He currently works for Burgess Diagnostics providing MRI services to veterinary surgeons throughout UK and Ireland. Geoff Skerritt is an RCVS Recognised Specialist in Veterinary Neurology, Diplomate of the European College of Veterinary Neurology and former President of the ECVN. In 1997 Geoff was one of the founders of VetMRI, the first mobile veterinary MRI facility in Europe. He is the founder and director of ChesterGates Animal Referral Hospital, a leading multi-discipline veterinary referral centre in the UK.

Author(s): Ian Elliott, Geoff Skerritt
Publisher: Wiley-Blackwell
Year: 2010

Language: English
Pages: 163
Tags: MRI

PART One Physical Principles of MRI 1
Chapter 1 Basic Principles 3
The hydrogen proton 4
Transmission of the MR signal 10
Image weighting and contrast 13
Spin echo and scan time 20
Spatial localisation 21
Fourier transformation 25
Pulse sequences: the quest for speed 25
Chapter 2 MR System Hardware 29
Magnets 29
Shielding 32
Shimming 33
Gradients 33
Radiofrequency system 34
Faraday cage 35
Image processing and archiving 36
Chapter 3 Imaging Parameters 39
Signal and noise 40
Contrast 45
Artefacts 46
Contents
COPYRIGHTED MATERIAL
viHANDBOOK OF SMALL ANIMAL MRI
Chapter 4 Image Artefacts: Recognition and Reduction 47
Movement artefact 48
Phase wrap or aliasing 52
Frequency wrap 55
Chemical shift 55
Chemical misregistration 57
Susceptibility artefact 58
System-induced artefacts 60
Partial volume averaging 61
Part Two MRI in Veterinary Practice 65
Chapter 5 MRI Safety 67
Magnets and magnetic fi elds 67
Safety issues 68
Further reading 72
Chapter 6 Using MRI in Clinical Veterinary Practice 73
Introduction 73
Anaesthesia 75
Patient positioning 77
Imaging planes 79
Contrast agents 80
Clinical indications 81
Head 82
Spine 98
Degenerative disease 112
Congenital abnormalities 115
Musculoskeletal system 121
Thorax, abdomen and pelvis 124
Foreign bodies 126
Anatomy Atlas for MRI Interpretation 129
Further Reading 145
Glossary 147
Index 153