Fig. 4
Correlation analysis plot. Red indicates a positive correlation, while blue indicates a negative correlation. The range of correlation coefficient (R) values is -1 to 1, where a larger |R| indicates a stronger correlation. S-I, superior-inferior; A-P, anterior-posterior; and R-L, right-left. B, bladder; â–³v, bladder volume increment. Sup-R, super rectum; Mid-R, middle rectum; and Low-R, lower rectum