First page Back Continue Last page Overview Graphics
QC tests for radiotherapy CT scanners
Requirements of a CT simulation scan:
Accurate tumour localisation
- good image quality
- sufficient scan coverage
- accurate distance dimensions
- positioning laser accuracy
- couch movement & orientation
Treatment position reproducibility
- flat table top & immobilisation devices
- large gantry aperture
CT number accuracy
- correct electron density values for inhomogeneity corrections