Cargando…
Clinical low field strength magnetic resonance imaging : a practical guide to accessible MRI /
This book covers all aspects of low field MRI, describing its advantages, problems, and prerequisites. Individual chapters are devoted to site planning, safety considerations, coils, imaging technique, image quality optimization, the imaging of different anatomic regions, and likely future developme...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Cham :
Springer,
[2016]
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Foreword; The Great Wave at Low Field Strength; Preface; Contents; List of Contributors; 1: Introduction; 1.1 History; References; 2: MRI System; 2.1 Magnet; 2.1.1 Permanent Magnets; 2.1.2 Electromagnets; 2.1.3 Superconducting Magnets; 2.1.4 Dedicated Systems; 2.1.5 Homogeneity; 2.1.6 Vertical or Horizontal Magnetic Field?; 2.2 Gradients; 2.2.1 Gradient Chain; 2.2.2 Rise Time and Slew Rate; 2.2.3 Eddy Currents; 2.3 RF Chain; 2.3.1 Transmitter; 2.3.2 Coils; 2.3.2.1 Solenoid Coils; 2.3.2.2 Helmholtz Coil; 2.3.2.3 Quadrature/Birdcage Coil; 2.3.2.4 Array Coil
- 2.3.2.5 A/D Converter2.4 Back End; 2.5 Quality; References; 3: Site Planning; 3.1 MRI System Components; 3.2 Room Size and Conditions; 3.3 Transport and Installation; 3.4 Static Requirements; 3.5 Power Supply and Cooling; 3.6 Sound and Vibration; 3.7 Static Magnetic Field; 3.8 Distortion of the Magnetic Field; 3.9 Distortion of Equipment by the MRI Magnetic Fringe Field; 3.10 RF Shielding; 3.11 Room Light, Reporting Stations; 3.12 Warning Signs; References; 4: Safety Considerations; 4.1 Static Magnetic Fields; 4.2 Gradient Magnetic Fields; 4.3 Radiofrequency Fields
- 4.4 Acoustic Noise4.5 Claustrophobia; 4.6 Pacemaker; 4.7 Other Devices; 4.7.1 Cerebrospinal Fluid Valves; 4.7.2 Cochlear Implants; 4.7.3 Bullets, Pellets, Shrapnel; References; 5: Low-Field-Specific Physical Aspects; 5.1 Larmor Frequency and Chemical Shift; 5.2 Homogeneity; 5.3 T1 Relaxation; 5.4 Contrast-Enhanced Imaging; 5.5 Bandwidth; 5.6 RF Deposition; 5.7 Susceptibility; 5.8 Sensitivity to Motion; 5.9 Dielectric Effects; 5.10 Signal-to-Noise Ratio; References; 6: Low-Field Imaging Technique; 6.1 Positioning; 6.2 Sequences; 6.2.1 Spin Echo; 6.2.2 Multi-Spin Echo
- 6.2.3 Gradient Echo6.2.4 Rapid Gradient Echo Imaging; 6.2.5 3D Imaging; 6.2.6 Fat Saturation; 6.2.6.1 Dixon Technique; 6.2.6.2 Spectral Fat Saturation; 6.2.6.3 Water Excitation; 6.2.6.4 STIR; 6.2.6.5 SPAIR; 6.2.7 Diffusion Imaging; 6.2.8 Angiographic Techniques; 6.2.8.1 Time of Flight (Inflow Angiography); 6.2.8.2 Phase-Contrast MR Angiography; 6.2.8.3 Contrast-Enhanced MR Angiography (CE-MRA); 6.2.8.4 Black Blood MR Angiography; 6.3 Spatial Resolution; 6.3.1 Matrix; 6.3.2 Interpolation; 6.4 Contrast; 6.4.1 Contrast to Noise; 6.4.2 Number of Excitations
- 6.4.3 Postprocessing6.5 Temporal Resolution; 6.5.1 Partial Scan; 6.5.2 Parallel Imaging; 6.6 Contrast Agents; 6.6.1 Positive Contrast Agents; 6.6.2 Negative Contrast Agents; 6.6.3 Gadolinium; 6.6.4 Ventilation Imaging; 6.6.5 Enteral Contrast Agents; 6.7 Artifacts; 6.7.1 Distortion of the Magnetic Field; 6.7.1.1 Inhomogeneity; 6.7.1.2 Susceptibility; 6.7.2 RF and Gradients; 6.7.2.1 Slice Profile Artifacts; 6.7.2.2 Line Artifacts; 6.7.3 Motion; 6.7.3.1 Heart and Lungs; 6.7.3.2 Flow; 6.7.4 Signal Processing; 6.7.4.1 Chemical Shift; 6.7.4.2 Aliasing; 6.7.4.3 Truncation