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KMID : 1103720160740050313
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Journal of the Korean Society of Radiology
2016 Volume.74 No. 5 p.313 ~ p.321
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Comparison between Doppler Ultrasonography and Renal Scintigraphy in Assessment of Post-Transplant Renal Function
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Yoon Yeo-Chang
Shin Byung-Seok
Ohm Joon-Young
Kim Seong-Min
Ahn Moonsang
Yang Shin-Seok
Park Mi-Hyun
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Abstract
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Purpose: To compare the usefulness of Doppler ultrasonography and renal scintigraphy in the assessment of short- and long-term function of transplanted kidneys.
Materials and Methods: We retrospectively reviewed the cases of 79 patients who underwent Doppler ultrasonography and technetium-99m diethylene triamine pentaacetic acid renal scintigraphy on the same day, within 4 days of renal transplantation. Image parameters were evaluated for statistical differences.
Results: There was a strong positive correlation between the glomerular filtration rate (GFR) as measured by renal scintigraphy and the estimated GFR (eGFR) based on serum creatinine levels (correlation coefficient = 0.71). Scan grade according to the time-activity curve, resistive index, and end diastolic velocity showed moderate correlations with the eGFR (correlation coefficients = -0.557, -0.329, and 0.370, respectively) in the early post-transplantation period. The mean survival time was longer in patients with lower resistive indices (≤ 0.68, 54.9 months vs. > 0.68, 29.5 months) and lower pulsatility indices (≤ 1.32, 53.8 months vs. > 1.32, 28.7 months); however, there were no statistically significant differences in the long-term follow-up period (p = 0.121 for resistive index and p = 0.074 for pulsatility index).
Conclusion: Renal scintigraphy is a more sensitive method than Doppler ultrasonography for assessing transplanted kidney function in the early post-transplantation period. Doppler ultrasonography might reflect the long-term survival time. However, it is difficult to predict long-term renal function using either method.
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KEYWORD
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Ultrasonography, Doppler, Radionuclide Imaging, Kidney Transplantation, Glomerular Filtration Rate
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