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MRI at a Glance
| Autor principal: | |
|---|---|
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Newark :
John Wiley & Sons, Incorporated,
2016.
|
| Colección: | New York Academy of Sciences Ser.
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Intro
- QR code
- TitlePage
- Copyright
- Preface
- Acknowledgement
- How to use your textbook
- About the companion website
- 1 Magnetism and electromagnetism
- Magnetic susceptibility
- Paramagnetism
- Diamagnetism
- Ferromagnetism
- Electromagnetism
- 2 Atomic structure
- Introduction
- Motion within the atom
- MR active nuclei
- 3 Alignment
- The classical theory
- The quantum theory
- What do the quantum and classical theories tell us?
- 4 Precession
- Precessional (Larmor) frequency
- Precessional phase
- 5 Resonance and signal generation
- Energy absorption
- Phase coherence
- The MR signal
- 6 Contrast mechanisms
- What is contrast?
- Extrinsic contrast parameters
- Intrinsic contrast mechanisms
- The composition of fat and water
- 7 Relaxation mechanisms
- Relaxation processes
- Field inhomogeneities
- 8 T1 recovery
- T1 recovery in fat
- T1 recovery in water
- Control of T1 recovery
- 9 T2 decay
- T2 decay in fat
- T2 decay in water
- Control of T2 decay
- 10 T1 weighting
- Typical values
- 11 T2 weighting
- Typical values
- 12 PD weighting
- Typical values
- Other types of weighting
- 13 Conventional spin echo
- Mechanisms of CSE
- Contrast
- Typical values
- Uses
- 14 Fast or turbo spin echo
- how it works
- Mechanism
- Contrast
- 15 Fast or turbo spin echo
- how it is used
- Typical values
- Uses
- 16 Inversion recovery
- Mechanism
- Contrast
- Uses
- 17 Gradient echo
- how it works
- Mechanism
- 18 Gradient echo
- how it is used
- Typical values
- Uses
- 19 The steady state
- Echo generation in the steady state
- 20 Coherent gradient echo
- Mechanism
- Typical values
- Uses
- 21 Incoherent gradient echo
- Mechanism
- Typical values
- Uses
- 22 Steady-state free precession
- Mechanism
- Typical values
- Uses
- 23 Balanced gradient echo
- Mechanism
- Typical values
- Uses
- 24 Ultrafast sequences
- Turbo gradient echo
- Echo planar imaging
- Typical values
- Uses
- 25 Diffusion and perfusion imaging
- Diffusion weighted imaging
- Perfusion imaging
- 26 Functional imaging techniques
- Functional MR imaging (fMRI)
- Spectroscopy
- 27 Gradient functions
- How gradients work
- 28 Slice selection
- Mechanism
- Slice thickness
- 29 Phase encoding
- Mechanism
- 30 Frequency encoding
- Mechanism
- 31 K space
- what is it?
- 32 K space
- how is it filled?
- 33 K space and image quality
- K space
- signal and contrast
- K space
- spatial resolution
- 34 Data acquisition
- frequency
- Changing the receive bandwidth
- Changing the frequency matrix
- 35 Data acquisition
- phase
- 36 Data acquisition
- scan time
- TR
- Phase matrix
- Number of signal averages (NSA)
- Types of acquisition
- Reducing scan time
- 37 K space traversal and pulse sequences
- K space traversal in gradient echo
- K space traversal in spin echo
- K space traversal in single shot
- K space traversal in spiral imaging