The Diagnostic Value of Renal Cortical Scintigraphy by Single-test of Posterior Imaging in Children with Acute Pyelonephritis
Objective Given the potential risk of motion artifacts,acquisition duration reduction is desirable in pediatric renal cortical scintigraphy.The aim of this study was to compare the diagnostic values of posterior renal cortical imaging and posterior oblique imaging in children with APN,and to explore the feasibility of single-test of posterior imaging in order to shorten acquisition duration.Methods A total of 58 children with APN without other renal diseases were collected for the study.The diagnostic efficacy of posterior imaging and posterior oblique imaging for APN was compared.According to areas of the lesion on the posterior images,the correlation between the lesion size and the sensitivity of the posterior oblique image was analyzed.Results The positive rate of APN detected in posterior images(44.0％,51/116)was higher than that in posterior oblique images(37.1％,43/116).The paired X2 test showed a significant difference in positive rate between the two position images(P=0.008＜0.05),and no lesions detected in posterior oblique image were found.Further,the lesion area of posterior image was divided into 5 groups,and the sensitivities of posterior oblique image to APN lesion detection in each group were 0.0％(0/14),50.0％(9/18),85.7％(18/21),93.3％(14/15)and 100.0％(22/22),respectively.Spearman correlation analysis showed that the sensitivity of posterior oblique image to APN lesion detection was positively correlated with the size of lesion in POST image(rs=1.00,P＜0.01).Conclusion Oblique imaging method is not able to identify more lesions,while posterior imaging method can effectively shorten the collection duration under the premise of obtaining the same diagnostic information.
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