Abstract :
status of each kidney. Nuclear renal scanning objectively measure differential renal function, multiple studies have
demonstrated the role of assessment of renal perfusion and GFR with triphasic CT. The aim of this study is to assess the role
of CT based on renal parenchymal volume measurement in assessment of individual renal function compared to 99mTc-
DTPA renal scan in patients with unilateral renal obstruction.
Methods: During the indicated time interval, 42 patients with chronic unilateral obstruction; the percentage of the individual
renal functions by 99mTc-DTPA and by CT were assessed.
Results: The percentage of the individual renal functions as estimated by 99mTc-DTPA in obstructed kidneys ranged from
0% to 40.43% (13.22), while by CT is in range from 0 to 36.68% (15.52). The correlation between percent renal function
by 99mTc-DTPA renal scan and percent renal volume by CT were assessed in obstructed kidneys and there were statistically
significant relationship (r = 0.877, P < 0.0001).
Conclusion: CT scan can be used as an integrated modality to assess the functional and morphological status of unilateral
chronic renal obstruction, however 99mTc-DTPA renal scan is a safe choice with less radiation exposure, further
comparative studies are needed to assess the role of CT-based parenchymal volume in evaluation of individual renal
functions in patients with acute obstruction, bilateral nephropathy and renal impairment.
