. Author manuscript; available in PMC: 2011 May 1.

Published in final edited form as: Acad Radiol. 2010 Feb 26;17(5):614–623. doi: 10.1016/j.acra.2010.01.003

Table 1. Error values between threshold PET and histology.

Four types of error and the corresponding threshold values are given. The error types are medial axis error (row 4), boundary error (row 5), centroid error (row 6), and overlap index (row 7). Corresponding threshold value and tumor volume are also given in rows 2 and 3 respectively. Mean and standard deviation for the each row are given in the right most column. The most representative errors, boundary error and medial axis error, are highlighted in gray.

		Case1	Case2	Case3	Case4	mean/std
Independent variables	PET SUVmax threshold [unitless]	0.6	0.6	0.6	0.6	0.6/0.0
Independent variables	Tumor volume [cm³]	12.6	9.9	7.2	6.8	9.1/2.7
Dependent variables	Medial axis error [mm]	14.1	7.3	8.0	1.3	7.7/5.2
	Boundary error [mm]	8.4	17.7	6.2	9.0	10.3/5.1
	Centroid error [mm]	8.1	9.0	12.2	6.9	9.1/2.3
	Overlap index [unitless]	0.5	0.4	0.1	0.6	0.4/0.2