Table of Contents
CT - Focus Multi-slice
Introduction
About ImPACT
ImPACT reports
ImPACT web site : www.impactscan.org
From single slice axial to multi-slice helical
CT scanner development 1972 ? 2002
Technological advances, 1985 - 2002
Slip rings – allow continuous gantry rotation
Helical scanning
Dual slice scanning
Dual slice capabilities
Four slice scanning
Four slice scanners
Four slice scanners
Multi-slice detectors
Multi-slice detectors
Four slice detector switching
Four slice detector matrices
Fixed and adaptive array matrices
Flexible image reconstruction
Flexible image reconstruction
Multi-slice helical
Multi-slice helical interpolation
Multi-slice helical interpolation
Pitch in multi-slice
Pitch in multi-slice
Interpolation at different pitches
Recommended pitch
Effect of pitch on image quality
Eight and sixteen slice scanners
Sixteen slice detectors
Siemens sixteen slice detector array
Advantages of multi-slice
Scan speed
Scan speed
Z-axis resolution
Isotropic imaging
Z-axis resolution
Larger scan volumes
Scan flexibility
Scan flexibility
Problems / difficulties with MSCT
Overbeaming in z-axis
Geometric efficiency
Artefacts
Cone beam artefacts
Cone beam effects - axial
Cone beam artefacts - helical
ASSR
Effect of ASSR
AMPR, Feldkamp, n-p etc
End of part one!
Implications of multi-slice scanners
Workflow implications
Dosimetry
Z-axis geometric efficiency
Scan protocols
mA modulation
mA modulation
mA modulation
mA modulation
mA modulation – manufacturers’ implementations
Paediatric protocols
Population doses
Testing and QC
Image noise
Slice thickness
Z-sensitivity
Thin slices
Beam profiles
Clinical applications and impact of multi-slice
Trauma
Paediatic
Colon imaging
Lung imaging
Lung imaging
Angiography with MS CT
Angiography with MSCT
Angiography
3 D Imaging
Perfusion imaging
Perfusion imaging
Cardiac scanning
Problems with single slice cardiac CT
Multi-slice cardiac CT
Prospectively triggered cardiac CT
Multi-sector reconstruction
Multi-sector reconstruction
Multi-sector reconstruction
Calcification scoring
Coronary angiography
Stent, CABG follow up
The future
The future
Conclusions
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