Figure 4.

Line graphs showing the correlation between image quality and image timing. (A) For the ex vivo study, there is a small negative correlation between image contrast and the time interval between fluorescein sodium dosing and imaging (ρ = -0.363, p = 0.002). The result for image brightness and timing of imaging was not statistically significant (ρ = -0.224, p = 0.06). (B) For the in vivo study, no correlation was observed between image brightness (ρ = -0.018, p = 0.88) and contrast (ρ = -0.021, p = 0.86) and timing of imaging. Used with permission from Barrow Neurological Institute, Phoenix, Arizona.