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. Author manuscript; available in PMC: 2014 Aug 26.
Published in final edited form as: AJR Am J Roentgenol. 2010 Jun;194(6):1434–1442. doi: 10.2214/AJR.10.4404

Fig. 4. Benign simple renal cyst (arrow) in 79-year-old man.

Fig. 4

A, Axial unenhanced image through low-attenuation mass in right kidney. Attenuation of lesion measures 7 HU.

B, Axial enhanced image through lesion shows no visual evidence of enhancement. Attenuation of lesion measures 8 HU. Absence of enhancement is diagnostic of benign renal cyst.

C, Axial virtual noncontrast image. Measured attenuation was nearly identical to true unenhanced value (6.2 HU).

D, Axial iodine-overlay image through lesion shows absence of central iodine signal; this finding is consistent with diagnosis of renal cyst.