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Table 2 Relative errors calculated between the in-house and the commercial software for the analysed parameters, including mean relative error for every parameter and mean relative error considering the absolute values

From: Optimisation of ultrasound liver perfusion through a digital reference object and analysis tool

Case number Relative error (%)
MTT AUC MI TTP
1 7.08 - 12.12 5.50 5.84
2 - 1.94 12.01 - 3.55 6.41
3 - 8.94 25.27 - 17.13 - 1.13
4 - 1.57 - 9.05 - 2.25 28.64
5 - 25.89 22.68 - 37.78 17.29
6 - 4.80 49.91 - 8.66 - 24.64
7 10.53 22.66 17.36 - 13.79
8 - 9.63 - 64.09 - 3.87 - 29.61
9 - 19.58 - 40.41 - 23.16 9.71
10 16.39 12.88 21.11 9.31
11 - 6.34 15.59 - 7.57 - 4.80
12 18.57 8.08 14.86 5.66
13 8.52 18.91 4.46 3.84
Mean - 1.35 4.79 - 3.13 0.97
Mean absolute 10.75 24.13 12.87 12.36
  1. MTT mean transit time, AUC area under the curve, MI maximum intensity, TTP time to peak