detection ot hydronephrosis and non-opaque stones.

detection ot hydronephrosis and non-opaque stones.7. CT scan - for demonslratlrjn of renal and bladder tumours Non-opaque calcul have a high density in CT scanning. 8. Magnetic resonance imaging - useful lor dlirereniiatlnrj I urrours from cysts. 9. Anteg«ade arid reirograde pyelography -are used to identify site ot ureteric obstruction or to demonatrate small lesions in Ihe collecting system, pefvfa or ureter mainly when they have not been shown adequately by other techniques.. 10. Renal artenography - It MU is negative and bleeding seems to have orginafed in kidney. Salective catherarization of renal artery and injecircn of contrast medium Into the vessel leads to greatly Improved visualization of the smaller intranal arterloles. This selective technique is of most value in dfferential diagnosis of renal masses 11. Addllonal Investigations -(a) Serum calcium and phosphorus -to exclude hyperparahyroidsm with urinary calculi. (b)Serum acid phosphaiase -