Cardiac Artefacts

What caused this artefact?

• Phase misregistration

• Breathing

• Undersampling

• ECG failure

What is this arefact called?

• Undersampling

• Poor temporal resolution

• Conebeam artefact

• Breathing

What caused this artefact?

• Spiral mode - decrease in HR on inspiration

• Spiral mode - increase in HR on inspiration

• Sequential mode - decrease in HR on inspiration

• Sequential mode - increase in HR on inspiration

What is this artefact?

• Low kV, high HU

• Breathing

• Beam hardening

• Metallic artefact

How do we prevent this artefact?

• Coach patients breathing

• More contrast, less saline

• More saline, less contrast

• Increase injection rate

What caused this decrease in image quality?

• Low dose

• Incorrect Phase selection

• Slow scanner = poor temporal resolution

• What decrease?

What caused this artefact?

• Pacemaker lead

• SVC Contrast

• Breathing

• Incorrect contrast phase

What caused this artefact?

• Breathing

• Incorrect phase (% rather than ms)

• Sequential mode pitfall

• Patient moved