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![[Figure 2]](gy5021fig2mag.jpg)
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Figure 2
Top: study case. A cubic DNA feature (size d) is embedded in a cubic water cell (l = 5 µm), surrounded by air/helium (a = 5 mm). The photon beam scans regions containing only water (case 0), or water and DNA (case f). These two cases are used to evaluate the resolving power of SCXM at a given dose. Bottom: dose needed to resolve a DNA feature as a function of its size assuming 100% detection efficiency, for X-ray energies of 30 keV and 64 keV, obtained, respectively, with Geant4 (Agostinelli et al., 2003  ) (solid lines) and using NIST values (Berger et al., 2010) (dotted line), and the formulas in the text. The black line represents the maximum tolerable dose estimated from coherent scattering experiments (Howells et al., 2009). |
![[Figure 2]](gy5021fig2.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
