Table 2 The empirical functions used to estimate the imaging doses to the brain, lungs and red bone marrow scanned by various imaging procedures, in which, C was the circumference of the head, thorax or pelvis, respectively.
From: Imaging Dose, Cancer Risk and Cost Analysis in Image-guided Radiotherapy of Cancers
Imaging Dose (cGy) = | Fitting Parameters | |||
|---|---|---|---|---|
CT | y0 × exp(−a × C) | y0 | a | |
Brain | 1.23 | 1.49E-02 | ||
Lung | 1.48 | 9.50E-03 | ||
Red bone marrow | 2.17 | 1.38E-02 | ||
kVPI | y0 + a × C | y0 | a | |
Brain | 2.0 | −1.69E-02 | ||
Lung | 2.05 | −1.15E-02 | ||
Red bone marrow | 1.95 | −1.27E-02 | ||
MVPI | y0 + a × C | y0 | a | |
Brain | 4.32 | −1.46E-02 | ||
Lung | 4.46 | −1.32E-02 | ||
Red bone marrow | 4.07 | −1.54E-02 | ||
CBCT | y0 | a | b | |
Brain | y0 + a × C + b × C2 | 29.02 | −8.01E-01 | 0.0063 |
Lung | y0 + a × C | 3.61 | −2.12E-02 | |
Red bone marrow | y0 + a × lnC + b × Age | 33.55 | −6.21E + 00 | −6.21 |
