Fig 1.
ImPACT and NCICT phantom scan start end positions for a) abdomen/pelvis b) chest and c) head protocols. Start and end measurements are indicated below each phantom diagram. Length of scan is shown in brackets. Phantom images are screenshots from ImPACT and NCICT software adapted to show stop start locations for the three protocols.
Fig 2.
Bland Altman Plots for effective dose for the a) abdomen/pelvis b) chest and c) head protocols.
Fig 3.
Bland Altman Plots for median organ equivalent dose for the a) abdomen/pelvis b) chest and c) head protocols.
Table 1.
Median of the organ equivalent dose for each protocol by BEIR VII category (male and female) and effective dose (gender neutral).
Table 2.
Passing Bablok regression–Comparison of median organ equivalent doses as estimated by ImPACT and NCICT for each protocol (abdomen pelvis, chest and head) for those organs that contribute >10% to total cancer incidence (averaged over ages 18–80) for a) males and b) females.
Fig 4.
Lifetime attributable risk of cancer incidence for a) males and b) females exposed to radiation associated with an abdomen pelvis CT scanning protocol as calculated using ImPACT or NCICT software. Figure inset shows the average distribution of cancers across the lifespan (18–80 years) for each type of software (percentage contribution <4% are not annotated).
Fig 5.
Lifetime attributable risk of cancer incidence for a) males and b) females exposed to radiation associated with a chest CT scanning protocol as calculated using ImPACT or NCICT software. Figure inset shows the average distribution of cancers across the lifespan (18–80 years) for each type of software (percentage contribution <4% are not annotated).
Fig 6.
Lifetime attributable risk of cancer incidence for a) males and b) females exposed to radiation associated with a head CT scanning protocol as calculated using ImPACT or NCICT software. Figure inset shows the average distribution of cancers across the lifespan (18–80 years) for each type of software (percentage contribution <4% are not annotated).