Abstract
Abstract
Objectives
Validate the accuracy of a portable bladder scanner (Caresono PadScan HD5) against planning CT and demonstrate its clinical application to optimize bladder preparation in pelvic radiotherapy.
Methods
Two retrospective cohorts were analyzed: 114 patients assessed with HD5 and 111 historical controls. Agreement between HD5-measured volume (VHD5) and planning CT (VCT) was evaluated with correlation, regression, Bland–Altman, and paired tests. Initial CBCT repetition rates were compared between cohorts. Subgroup analyses (bladder volume [BV]
Results
V HD5 correlated with VCT (r = 0.723, P
Conclusions
HD5 enables reliable, though negatively biased, BV estimates. Embedding an age-stratified, moderate-fill workflow reduces repeat initial CBCT and standardizes bladder preparation.
Advances in knowledge
We quantify volume-dependent underestimation and an age interaction, and translate them into a predictive, age-stratified protocol that operationalizes HD5 measurements for routine pelvic RT bladder management.