Fig. 2From: Automatic delineation and quantification of pulmonary vascular obstruction index in patients with pulmonary embolism using Perfusion SPECT-CT: a simulation studyDetermination of the best threshold for the 3 segmentation methods. DICEPE coefficients were calculated on 90 randomly selected models using various thresholds. The best thresholds were 15% for the MaxTh method, Z = − 1 for the ZTh method and − 50% for the RelDiffTh methodBack to article page