The mean difference (δ3D-4D) between 3D and 4D PET images in texture features.

The ranges of δ3D-4D and the p-values for Wilcoson signed-rank test are also shown. MCC = maximal correlation coefficient. LRLG = Long run low gray-level emphasisThe mean difference (δ3D-4D) between 3D and 4D PET images in texture features.同时展示了δ³D-⁴D的取值范围以及威尔科克森符号秩检验（Wilcoxon signed-rank test）的p值。其中，MCC为最大相关系数（maximal correlation coefficient），LRLG为长时低灰度级强调（Long run low gray-level emphasis）；δ³D-⁴D指代3D与4D正电子发射断层扫描（PET）图像在纹理特征维度上的平均差值。