IMAGERY OF THE KIDNEY AND THE EXCRETORY S YSTEM

Imagery of the upper urinary tract in veterinary medicine uses essenti ally radiography and ultrasonography. When it is difficult to obtain a clear image of kidney structure by radiography (conventional and with a contrast product), ultrasonography offers an excellent representati on of the parenchyma and vascular structure. In the case of renal affe ctions a more precise diagnosis can be obtained by histological analys is of a biopsy; taken under ultrasonographic control. On the other han d examination of the urethras is usually performed by radiography with a contrast product. The two techniques are therefore complementary, b ut neither allows an accurate evaluation of filtration efficiency.