mri artefacts

Transcription

mri artefacts
MRI ARTEFACTS
Raimo Sepponen
Motion artefact
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Motion artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Motion Artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Instability artefact
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Vascular pulsation artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Respiration and vascular artefacts
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Respiration and cardiac artefacts:
Respiration Oriented Phase Encoding (ROPE)
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Cardiac motion – ECG Gating
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Vascular pulsation
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
CSF Flow artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Gibbs Ringing - Truncation
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Truncation artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Fat/Air interface, Aliasing
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Aliasing artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
RFI Interference
BW 100 kHz
BW 50 kHz
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RF Interference
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Random noise
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Quadrature error
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Digitizer Quantization - Low Dynamic Range
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RF Inhomogeneity
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Shimming
Spin Echo
Gradient Echo
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Susceptibility artefact
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Susceptibility artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Susceptibility artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Chemical shift artefact
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Fat/Water cancellation
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Clipping - ADC overflow
Receiver overshoot
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999
Slice interference
MRI Clinics of North America: Vol.7, No. 4: Nov. 1999

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