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. Author manuscript; available in PMC: 2014 Jan 24.

Published in final edited form as: AJR Am J Roentgenol. 2011 Jun;196(6):1279–1287. doi: 10.2214/AJR.10.5041

Fig. 5 — Receiver Operating Characteristic (ROC) analysis of the stone composition differentiation using dual-source DECT with and without additional tin filtration. Four ROC curves are illustrated to indicate the ability of DECT to differentiate five stone groups: Group 1: uric acid, uric acid dihydrate and ammonium acid urate; Group 2: cystine; Group 3: struvite; Group 4: calcium oxalate monohydrate, calcium oxalate dihydrate and brushite; Group 5: hydroxyapatite and carbonate apatite. The ROC curves with tin filtration (b) show larger area under the curve than without tin filtration (a), which suggests a better method to differentiate the five stone groups.

Fig. 5 — Receiver Operating Characteristic (ROC) analysis of the stone composition differentiation using dual-source DECT with and without additional tin filtration. Four ROC curves are illustrated to indicate the ability of DECT to differentiate five stone groups: Group 1: uric acid, uric acid dihydrate and ammonium acid urate; Group 2: cystine; Group 3: struvite; Group 4: calcium oxalate monohydrate, calcium oxalate dihydrate and brushite; Group 5: hydroxyapatite and carbonate apatite. The ROC curves with tin filtration (b) show larger area under the curve than without tin filtration (a), which suggests a better method to differentiate the five stone groups.