Principles of CT Dosimetry
Dose contribution from CT scanning
Dose optimisation
Dose distribution - scan plane
Dose distribution - normal to scan plane
Distribution in scan plane
Z-axis dose profile
CT dose descriptors
Computed Tomography Dose Index (CTDI)
Dose descriptors - CTDI
Multiple Scan Average Dose - MSAD
CTDI and MSAD
Instrumentation
Instrumentation (1)
Instrumentation (2)
Instrumentation (3)
Measurements with ion chamber
Measurement of CTDI with ion chamber
Measurements with film
Measurements with TLD
Measuring MSAD
CTDI definitions
CTDI: Measurement medium
Dose to what medium?
Integration distance
Variation of CTDI with slice width
CTDI in Perspex phantoms
CTDI in phantoms
PPT Slide
Weighted average CTDI100
Which CTDI is displayed on my console?
Effect of scan length on dose
Absorbed dose & radiation risk
‘Dose’ definitions
Effective Dose (E)
Calculation of effective dose
Estimates of Effective Doses
An Inspector Calls
DRLs in CT
EC Diagnostic Reference Levels for CT
Summary
Email: maria@impactscan.org
Home Page: www.impactscan.org