Figure 4
From: Contrast timing optimization of a two-volume dynamic CT pulmonary perfusion technique
Time-to-peak delays in the pulmonary artery and descending aorta. Gamma-fit ideal time-to-peak delays were compared to the one-half injection time in all experimental animal data. Pulmonary arterial time-to-peak (black) and the aortic time-to-peak (red) are paralleled with different interceptions (dispersion factor). The blue dot line is the unity line. Gamma fit time-to-peak (TPA, TA) is defined as the time between the peak of the second derivative of the gamma fit and the true peak of the gamma fit, respectively. TInj: contrast injection time; RMSE: root-mean-square-error; RMSD: root-mean-square-deviation; r: Pearson correlation coefficient.
