Fig. 4From: Online MR evaluation of inter- and intra-fraction uterus motions and bladder volume changes during cervical cancer external beam radiotherapyThe distribution of bladder volume under different measurements.There was no significant statistical difference between ultrasound scan and the post treatment scan.One asterisk mean that the p value was less than 0.01.Three asterisks mean that the p-value was less than 0.001.Four asterisks mean that the p-value was less than 0.0001Back to article page