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21.05.14 |
StefanDelorme
Division ofRadiology
MRI: Strengths
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Excellent tissue contrast
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Flexible assessment of tissue properties
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Functional imaging
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No ionizing radiation
21.05.14 |
StefanDelorme
Division ofRadiology
MRI: Weaknesses
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Slow
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Not always geometrically correct
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Artifacts
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Motion
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Metal
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Air
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Exclusions
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Electronic devices
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Pacemakers
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Insulin pumps etc.
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Cochlea implants
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Metal
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Implants, clips not fixed to bone
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Large tatoos
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Claustrophobia
21.05.14 |
StefanDelorme
Division ofRadiology
Outline
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Computed tomography
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How it works
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Strengths
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Weaknesses
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Magnetic resonance imaging
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How it works
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Strengths
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Weaknesses
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Ultrasound
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How it works
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Strengths
•
Weaknesses
21.05.14 |
StefanDelorme
Division ofRadiology
Pre-ultrasound era…
21.05.14 |
StefanDelorme
Division ofRadiology
Pulse-echo techniques
Delorme, Debus: Duale Reihe Sonographie, Thieme
21.05.14 |
StefanDelorme
Division ofRadiology
Interaction between sound and tissue
Delorme, Debus: Duale Reihe Sonographie, Thieme
Reflection
Refraction
Scattering Absorption Divergence