In-bath filming during extracorporeal shock wave lithotripsy

Extracorporeal shock wave lithotripsy (ESWL) is now the preferred method for treating most renal calculi. We designed a cassette and grid holder and a technique for filming in the water bath. The excellent film quality permits initial localization of small or faint calculi and confirmation of satisfactory fragmentation during ESWL. The technique facilitates patient treatment and throughput and should reduce the repeat treatment rate.