Comparison of reliabilities of the delayed images of helical renal CT in detecting small renal masses

The reliabilities of the delayed images of helical computed tomography (CT) in detecting renal mass lesions of 30 mm or less in diameter was compared. Nephrographic, excretory and nephrographic+excretory phase images of all patients were evaluated separately to detect mass lesions of ≤5 and 5–30 mm. There was not any statistically significant difference in the results of three groups. Nephrographic, excretory and nephrographic+excretory phase images are not different from or superior to each other in lesion detection.