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. 2013 Mar 11;8(3):e58439. doi: 10.1371/journal.pone.0058439

Table 2. Contrast-to-noise ratio analysis for solid tumor visibility and tissue composition discernibility.

Attenuation contrast Phase contrast Relative contrast gain
Solid Tumor
Synchrotron (high-performance) 0.37Inline graphic0.04 10.4Inline graphic0.2 28Inline graphic3
Synchrotron (low-dose) 0.6Inline graphic0.2 2.4Inline graphic0.3 4Inline graphic1
Tube source 0.8Inline graphic0.2 7.8Inline graphic0.6 10Inline graphic3
Cystic lesion
Synchrotron (high-performance) 0.06Inline graphic0.08 7.2Inline graphic0.3 —

Based on the indicated ROIs in Fig. 2 and Fig. 3, the CNRs for attenuation and phase contrast, as well as their ratio (relative contrast gain), are listed. For the cystic lesion, the relative contrast gain is not listed as the error in the attenuation image is of the same order as the CNR itself.