A method for the quantitative assessment of contractional patterns of the urinary bladder in dogs is described. It involves a mirror well in which the bladder is suspended. 44 photograph of the well gives five orthogonal projections of the bladder surface. Sequential pictures allow movements to be detected and analysed.
Hans Kunov, Hans Kunov,
"A Study Of Contractional Patterns Of The Urinary Bladder In Dogs", Proc. SPIE 0026, Quantitative Imagery in the Biomedical Sciences I, (1 June 1971); doi: 10.1117/12.975336; https://doi.org/10.1117/12.975336