Understanding Imaging Performance (3)
Artefacts in CT
Artefacts: definition
Types of artefact
Artefact origins
Beam hardening
PPT Slide
Beam hardening: cupping artefact
Avoiding beam hardening artefacts
Beam hardening: calibration correction
Beam hardening correction software
Reduction of streaks and bands
Partial volume artefact
Partial volume artefacts
Minimizing partial volume artefacts
Photon Starvation
Adaptive filtration
Multi-dimensional adaptive filtering
Effects of 3D filtration
Undersampling
Avoidance of undersampling artefacts
Metal artefacts
Avoidance of metal artefacts
Metal Artefact Reduction
Patient motion artefacts
Minimizing motion artefacts
Motion artefact correction
Detector sensitivity - Ring artefacts
Ring artefacts
Mechanical instability
Effects of rotor wobble
Artefacts in helical scanning
Helical artefacts (Pitch 2)
Helical artefacts - Abdomen
Helical artefacts - Head
Minimization of helical artefacts
Zebra artefact
Multislice scanner artefacts
Effect of interpolator on artefacts
Effect of pitch on artefacts
The cone beam problem
Cone beam artefact
Cone beam reconstruction
Effects of cone beam algorithm
Conclusions
Email: julia@impactscan.org
Home Page: www.impactscan.org