Fig 2.

Difference in temporal profiles of blood upwelling speed between inspiratory and expiratory phases. A, Blood was stored inside the dime-size defect in the inspiratory phase. B, The amount of accumulated blood was quantified and expressed as the change in the average gray scale in the observed area compared with that at the beginning of the recording. The region of interest was set at the adventitial defect of the aneurysmal sac. The ordinate indicates the average gray scale change in the region of interest, and the abscissa, the time after the video recording. The decrease in the averaged gray scale indicates the increase in the amount of bleeding. Open-source software (Image J; National Institutes of Health, Bethesda, MD) was used for the analysis.