The GSF models described above were generated from
actual patient models and thus reflect realistic variations in
the placement, shape, and size of organs. As a result, the
fraction of each partially irradiated organ’s volume located
within the abdominal scan region denoted percent coverage
is expected to differ across all patient models. In order to
quantify this variation, the average and standard deviation of
percent coverage was determined for each partially irradiated
organ across patients.
In order to determine if a size dependency exists between
nDP,O values and patient size for partially irradiated organs,
a similar regression analysis as described in Sec. II E 3 was
performed. Correlation coefficients R2 were determined for
each organ to assess the association between nDP,O and patient
perimeter.