Inter- and Intraobserver Variability of 99mTc-DMSA Renal Scintigraphy: Impact of Oblique Views

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FIGURE 1.
Normal findings on planar ^99mTc-DMSA scintigraphy. LPO = left posterior oblique; RPO = right posterior oblique.
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FIGURE 2.
Abnormal findings on ^99mTc-DMSA scintigraphy. Posterior, left posterior oblique (LPO), and right posterior oblique (RPO) images reveal slight enlargement of left kidney, with cortical defects. Although right kidney appears normal on posterior image, cortical defect is seen in lower pole on RPO view.
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FIGURE 3.
^99mTc-DMSA scintigraphy showing small left kidney with parenchymal scarring. Right side is considered indeterminate on posterior and posterior oblique views because of midzone impression seen in upper pole–lower pole junction suggestive of duplex kidney. Because no evidence of duplex kidney was present, right kidney was considered indeterminate for acute pyelonephritis or cortical scar. LPO = left posterior oblique; RPO = right posterior oblique.

TABLE 1

Impact of Oblique Images for DMSA Scan Interpretation

TABLE 2

κ-Statistics for Intraobserver Variability of DMSA Scintigraphy

TABLE 3

κ-Statistics for Interobserver Variability of DMSA Scintigraphy