Source of Support: None, Conflict of Interest: None
A programme using matrix algorithm for deconvolution analysis of renogram has been developed
at our centre in a (Siemens) microdelta computer (Siemens Ltd) in Fortran based Medical language. A total of sequential trames are acquired with both the kidneys facing the detector. The desired kidney regions are selected for deconvolution analysis. The software plots the retention function for each region of the kidney and computes minimum transit time (MinTT), mean transit time (MTT), transit time index (TTI) and maximum transit time (MaxTT) for them. Any prolongation of the transit time of the radioactive tracer through the different regions of the kidney becomes an important and reliable diagnositic tool for upper urinary tract obstruction.