Scintigraphic study of ureteral peristalsis using fast Fourier transforms.


Pathophysiological changes in ureteral kinetics can be monitored externally and non-invasively by means of a time-space matrix approach during the excretory phase of fast-frame routine renography. The main limitations of this method are poor space-time resolution and, in some cases, an inadequate visualization of the peristaltic waves. A new approach to the study of ureteral contractions using the power spectrum obtained from Fourier transforms of the ureteral time-activity curves was developed. The FORTRAN program was tested by an experimental simulation, and its subsequent application on fifty-one subjects indicated that the method is a useful complement to the space-time matrix technique. Moreover, evaluation of the power spectrum offers several advantages for the study of the pathophysiological parameters of peristalsis.

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@article{Ropolo1993ScintigraphicSO, title={Scintigraphic study of ureteral peristalsis using fast Fourier transforms.}, author={Roberto Ropolo and Patrizia Cesana and Giuseppe Picciotto and Antonella Sargiotto and Pier Giuseppe De Filippi}, journal={Journal of nuclear biology and medicine}, year={1993}, volume={37 4}, pages={223-7} }