Fig. 1From: CBCT evaluation of inter- and intra-fraction motions during prostate stereotactic body radiotherapy: a technical noteEvolution of the mean bladder volume before and during SBRT fraction, compared to the bladder on planning CT-scan. The bladder volume assessed on the planning CT-scan divided the bladder volume assessed on the CBCT performed before the first (blue line) and the second arc (orange line) (1 = volumes were equal)Back to article page