MRI at a Glance

MRI at a Glance encapsulates essential MRI physics knowledge. Illustrated in full colour throughout, its concise text explains complex information, to provide the perfect revision aid. It includes topics ranging from magnetism to safety, K space to pulse sequences, and image contrast to artefacts.
This third edition has been fully updated, with revised diagrams and new pedagogy, including 55 key points, tables, scan tips, equations, and learning points. There is also an expanded glossary and new appendices on optimizing image quality, parameters and trade–offs.

A companion website is also available at www.ataglanceseries.com/mri featuring animations, interactive multiple choice questions, and scan tips to improve your own MRI technique.

MRI at a Glance is ideal for student radiographers and MRI technologists, especially those undertaking the American Registry of Radiation Technologist (ARRT) MRI examination, as well as other health professionals involved in MRI.

Contents

Preface

Acknowledgements

How to use your textbook

About the companion website

1 Magnetism and electromagnetism

2 Atomic structure

3 Alignment

4 Precession

5 Resonance and signal generation

6 Contrast mechanisms

7 Relaxation mechanisms

8 T1 Recovery

9 T2 decay

10 T1 weighting

11 T2 weighting

12 PD weighting

13 Conventional spin echo

14 Fast or turbo spin echo how it works

15 Fast or turbo spin echo how it s used

16 Inversion Recovery

17 Gradient echo how it works

18 Gradient echo how it s used

19 The steady state

20 Coherent gradient echo

21 Incoherent gradient echo

22 Steady state free precession

23 Balanced gradient echo

24 Ultrafast sequences

25 Diffusion and perfusion imaging

26 Functional imaging techniques

27 Gradient functions

28 Slice selection

29 Phase encoding

30 Frequency encoding

31 K space what is it?

32 K space how is it filled?

33 K space and image quality

34 Data acquisition – frequency

35 Data acquisition – phase

36 Data acquisition scan time

37 K space traversal and pulse sequences

38 Alternative K space filling techniques

39 Signal to noise ratio

40 Contrast to noise ratio

41 Spatial resolution

42 Chemical shift artefacts

43 Phase mismapping

44 Aliasing

45 Other artefacts

46 Flow phenomena

47 Time of flight MR angiography

48 Phase contrast MR angiography

49 Contrast enhanced MR angiography

50 Contrast agents

51 Magnets

52 Radiofrequency coils

53 Gradients and other hardware

54 MR safety: bio–effects

55 MR safety: projectiles

Appendix 1a: The results of optimizing image quality

Appendix 1(b):  Parameters and their associated trade–offs

Appendix 2: Artefacts and their remedies

Appendix 3: Main manufactures acronyms

Glossary

Index