The mean effective dose coefficient was 0.02 ± 0.02 mSv/MBq.
For all patients, the kidneys absorbed dose coefficient values were between 0.004 and 0.131 mGy/MBq and the bladder absorbed dose coefficients were 0.01 0.93 mGy/MBq.
The PET ED was calculated by multiplying the injected activity by the Γ dose coefficient for each radiopharmaceutical.
Lastly, the remainder dose coefficient was 7% lower for newborns and 63% higher for 1-year-olds.
where d is the dose coefficient, a and b are fitting parameters and m is the sphere mass [20].
The effective dose of 4.73 mSv was calculated for a 292-MBq intravenous administration of 18F-FDG, which corresponds to an effective dose coefficient of 0.016 mSv/MBq.
The radioactive dose coefficient f is defined as a coefficient for dose evaluation from external exposure, and it can be calculated by the product of the effective dose ratio constant and nominal radioactivity value.
The same biokinetic model for intravenous administration of 18F-FDG was used in ICRP Publication 128 [9] with an effective dose coefficient of 0.019 mSv/MBq.
For orally administered 99mTc-pertechnetate, an effective dose coefficient of 0.016 mSv/MBq was calculated using the sets of tissue weighting factors given in ICRP Publication 60 [15].
In this paper, the effective dose coefficient for the same procedure was estimated to be 0.014 mSv/MBq when using an updated biokinetic model, revised phantoms, updated tissue weighting factors, updated nuclear decay data, and a new computational framework.
