A novel method for estimating the urine drainage time from the renal collecting system

Quantitative assessment of renal obstruction in multi-phase CTU using automatic 3D segmentation of the renal parenchyma and renal pelvis: A proof of concept

“…The first indicator is the “drainage time”, T 1/2 , in which half of the contrast media has been drained from the parenchyma [9] . T 1/2 was calculated by evaluating the amount of contrast media in the renal parenchyma in each of phases 2–4.…”

“…However, in addition to the prohibitive economic costs, MRU is relatively insensitive for detecting kidney stones [8] . Recently, fluoroscopic images of the renal pelvis during a nephrostogram have also been used to estimate the drainage rate of the urine from the kidney, but this method is invasive and requires a catheter insertion into the renal pelvis [9] .…”