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. Author manuscript; available in PMC: 2015 Apr 16.
Published in final edited form as: Transl Stroke Res. 2013 Oct 30;5(2):167–173. doi: 10.1007/s12975-013-0294-x

Figure 1.

Figure 1

Figure 1

Figure 1

Original figure from the publication “Exploring the age of intracranial aneurysms using carbon birth dating: Preliminary Results” by Etminan et al. 45 A) Atmospheric 14CO2 levels have been essentially stable over the past 2000 years, except for a large increase between 1955–1963 due to above ground nuclear tests.. B, C) The collagen samples of each individual patient were placed on the 14C record with projected concentrations to 2017 expressed in the F14C nomenclature, which does not correct for radioactive decay and illustrates above ground 14C levels over the past 85 years. 48–50, 66 The patients’ birth dates (vertical lines) and the aneurysm collagen date ranges (horizontal lines) are illustrated for ruptured (R) and unruptured (U) samples.