Noninvasive assessment of the transplanted kidney: ultrasound vs. computerized tomography

In our experience both ultrasound and CT are highly diagnostic in the identification of the posttransplant fluid collections and hydronephrosis. As is the case elsewhere in the abdomen, the two examinations appear to be complementary. Ultrasound should be the initial diagnostic modality due to the advantages mentioned before; CT is helpful in resolving questionable abnormalities noted on ultrasound or in difficult clinical situations. Combination of the two examinations in selected cases improves sensitivity and specificity in the detection of postoperative complications.