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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. 6 — Stone composition characterization with color coding. The commercially-available uric acid vs. non-uric acid differentiation algorithm with blue-red color coding is shown in the left panel (a); red: uric acid, blue: non-uric acid. Using dual-source DECT with additional tin filtration, it was possible to further characterize the same stones into one of five groups (b). These five groups and their representing colors are: Group 1 in red: uric acid, uric acid dihydrate and ammonium acid urate, Group 2 in yellow: cystine; Group 3 in green: struvite; Group 4 in turquoise: calcium oxalate monohydrate, calcium oxalate dihydrate and brushite; Group 5 in purple: hydroxyapatite and carbonate apatite.

Fig. 6 — Stone composition characterization with color coding. The commercially-available uric acid vs. non-uric acid differentiation algorithm with blue-red color coding is shown in the left panel (a); red: uric acid, blue: non-uric acid. Using dual-source DECT with additional tin filtration, it was possible to further characterize the same stones into one of five groups (b). These five groups and their representing colors are: Group 1 in red: uric acid, uric acid dihydrate and ammonium acid urate, Group 2 in yellow: cystine; Group 3 in green: struvite; Group 4 in turquoise: calcium oxalate monohydrate, calcium oxalate dihydrate and brushite; Group 5 in purple: hydroxyapatite and carbonate apatite.