[en] Abdominal rediographs after enhanced CT were evaluated using non-ionic, low osmotic contrast media, iohexol. Comparison were made with iopamidol (non-ionic, low osmolality) and diatrizoate (ionic, high osmolality). Iohexol gave good opacification in nephrogram and persistent opacification till 45 min, after enhancement as well as iopamidol. Abdominal radiographs after enhanced CT using iohexol is useful for total observation of the urinary tract. There is no significant difference of serum BUN and creatinine between before and after enhancement in 21 iohexol. (author)