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EJNMMI Physics
Fig. 9 | EJNMMI Physics

Fig. 9

From: Automatic delineation and quantification of pulmonary vascular obstruction index in patients with pulmonary embolism using Perfusion SPECT-CT: a simulation study

Fig. 9

Example of segmentation for a massive PE (red) using the MaxTh method (first row), the Zth method (second row), and the RelDiffTh method (third row). Ground truth is delineated in blue. MaxTh showed good correlation in PVOI assessment, but wrongly delineated areas without PE. RelDiff Method showed an underestimation of PVOI, but a good spatial agreement

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