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Figure 3 | Radiation Oncology

Figure 3

From: Feasibility and accuracy of relative electron density determined by virtual monochromatic CT value subtraction at two different energies using the gemstone spectral imaging

Figure 3

The error in the two different energy virtual monochromatic images subtraction algorithm relative to the nominal RED value over short and long term-period. Error bars present one standard deviation obtained from five sets of measurements at (a) 2 hours (short-term) and (b) 1-week intervals (long-term).

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