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Table 2 Overview of the investigated histogram parameters derived from Dynamic-contrast enhanced MRI

From: Associations between dynamic-contrast enhanced MRI and tumor infiltrating lymphocytes and tumor-stroma ratio in head and neck squamous cell cancer

Parameters Mean ± Standard
Deviation
Range Intraclass coefficient (95% Confidence interval)
Ktrans (1/min)
 Mean 0.19 ± 0.11 0.06–0.53 0.97 (0.94–0.97)
 Min 0.05 ± 0.03 0.009–0.13 0.97 (0.93–0.98)
 Max 0.63 ± 0.52 0.10–2.92 0.98 (0.95–0.99)
 P10 0.10 ± 0.06 0.04–0.24 0.97 (0.93–0.99)
 P25 0.13 ± 0.08 0.05–0.35 0.90 (0.79–0.96)
 P75 0.23 ± 0.13 0.08–0.63 0.98 (0.95–0.99)
 P90 0.30 ± 0.17 0.08–0.91 0.66 (0.35–0.83)
 Median 0.18 ± 0.10 0.07–0.45 0.96 (0.95–0.99)
 Mode 0.15 ± 0.10 0.04–0.47 0.93 (0.91–0.98)
 Kurtosis 6.43 ± 6.73 2.70–33.70 0.98 (0.97–0.99)
 Skewness 1.12 ± 0.83 −0.25-3.85 0.97 (0.93–0.98)
 Entropy 3.33 ± 0.51 2.10–4.72 0.97 (0.94–0.98)
Kep (1/min)
 Mean 0.40 ± 0.17 0.15–0.89 0.93 (0.85–0.97)
 Min 0.09 ± 0.06 0.01–0.22 0.95 (0.88–0.98)
 Max 1.04 ± 0.56 0.31–2.97 0.92 (0.84–0.96)
 P10 0.22 ± 0.11 0.07–0.58 0.95 (0.88–0.98)
 P25 0.29 ± 0.13 0.10–0.72 0.98 (0.95–0.99)
 P75 0.49 ± 0.20 0.19–1.04 0.95 (0.88–0.98)
 P90 0.59 ± 0.23 0.23–1.19 0.97 (0.94–0.98)
 Median 0.38 ± 0.16 0.15–0.89 0.96 (0.92–0.98)
 Mode 0.35 ± 0.16 0.14–0.89 0.96 (0.91–0.98)
 Kurtosis 4.61 ± 4.91 2.20–26.81 0.98 (0.97–0.99)
 Skewness 0.63 ± 0.61 −0.04-2.52 0.97 (0.92–0.98)
 Entropy 3.43 ± 0.56 2.20–4.38 0.96 (0.90–0.98)
Ve (unitless)
 Mean 0.52 ± 0.18 0.16–0.78 0.98 (0.95–0.99)
 Min 0.16 ± 0.10 0.03–0.34 0.75 (0.50–0.88)
 Max 0.94 ± 0.15 0.44–1.00 0.91 (0.81–0.96)
 P10 0.31 ± 0.15 0.09–0.58 0.92 (0.83–0.96)
 P25 0.38 ± 0.17 0.12–0.70 0.96 (0.94–0.98)
 P75 0.64 ± 0.21 0.19–0.92 0.92 (0.94–0.98)
 P90 0.77 ± 0.21 0.25–0.97 0.95 (0.88–0.98)
 Median 0.49 ± 0.20 0.15–0.83 0.98 (0.95–0.99)
 Mode 0.42 ± 0.24 0.12–0.98 0.98 (0.96–0.99)
 Kurtosis 3.04 ± 1.14 1.89–5.37 0.95 (0.89–0.98)
 Skewness 0.42 ± 0.70 −1.41-1.55 0.95 (0.89–0.98)
 Entropy 3.29 ± 0.63 1.55–4.12 0.93 (0.85–0.97)
  1. Abbreviation P percentile