Radiation dose to rectum in XXXX brachytherapy with a single implant and two fractions for @entity263 , and its prediction by @entity1069 .

@entity1 @entity1605 @entity1069 @entity263 @entity196 @entity1168
We aimed to clarify the differences between the estimated rectal dose (ERD) and the @entity196 ( @entity196 ) and @entity1605 ( @entity1605 ) to the rectum during @entity1168 ( @entity1168 ) brachytherapy, and to predict @entity196 from the @entity1069 ( @entity1069 ) or the rectal dose-volume parameters (RDVPs). ERD, @entity196 , and @entity1605 were assessed with a rectal dosimeter during @entity1168 brachytherapy of 18  Gy given in two fractions to 110 @entity1 (48 hormone recipients, 62 hormone-na  ve @entity1 ) with @entity263 . The correlations between @entity196 and @entity1069 , and between @entity196 and RDVP (D 2ml-D 5ml) were investigated. ERD (mean      SD) was 219      44  cGy, @entity196 was 255      52  cGy, and @entity1605 was 298      63  cGy, which differed significantly (p  <  0.001). The correlation coefficients between ERD and @entity196 , and between @entity196 and @entity1605 , were 0.82 and 0.78, respectively. @entity1605 was equivalent to 118      16  % @entity196 . The measured doses were significantly greater in the hormone recipients than in the hormone-na  ve @entity1 (p  <  0.001). The increase in @entity196 correlated with the increases in @entity1069 and in RDVPs. The correlation coefficients between @entity1069 and @entity196 in all of the @entity1 , in the hormone recipients, and in the hormone-na  ve @entity1 were 0.61, 0.64, and 0.64, respectively, whereas that between RDVPs and @entity196 was <0.53. In conclusion, the dose to the rectum increased with time and was correlated with the increases in @entity1069 and RDVPs. The correlation coefficient between @entity196 and @entity1069 was greater than that between @entity196 and RDVPs.
