An Adaptive Thresholding Method for BTV Estimation Incorporating PET Reconstruction Parameters: A Multicenter Study of the Robustness and the Reliability

Table 3

Scanner-model specific calibration curves, model , shrinkage on cross validation and independent predictor of TS ranked in order of significance.

	Equation			TS predictors
Discovery ST	TS = 90.68 − 62.44 · (1 − 1/TBR) + 1.05 · FWHM (mm)	0.91	−0.008	1 − 1/TBR (, partial ); FWHM (, additional )
Discovery STE	TS = 88.68 − 59.39 · (1 − 1/TBR) + 1.03 · FWHM (mm)	0.87	0.004	1 − 1/TBR (, partial ); FWHM (, additional )
Discovery 600	TS = 93.52 − 64.38 · (1 − 1/TBR) + 0.99 · FWHM (mm)	0.92	0.000	1 − 1/TBR (, partial ); FWHM (, additional )
Discovery 690	TS = 63.04 − 0.015 · (mm^2) − 40.51 · (1 − 1/TBR) + 1.92 · FWHM (mm)	0.74	0.007	1 − 1/TBR (, partial ); FWHM (, additional ); (, additional )
Biograph Hi-REZ	TS = 88.19 − 56.18 · (1 − 1/TBR) + 0.67 · FWHM (mm)	0.92	−0.012	1 − 1/TBR (, partial ); FWHM (, additional )
Biograph TRUEV	TS = 90.43 − 61.86 · (1 − 1/TBR) + 0.95 · FWHM (mm)	0.89	−0.013	1 − 1/TBR (, partial ); FWHM (, additional )
Gemini XL	TS = 92.04 + 0.0025 · (mm^2) − 59.15 · (1 − 1/TBR)	0.82	0.067	1 − 1/TBR ( partial ); (, additional )
Gemini TF	TS = 88.57 + 0.0027 · (mm^2) − 57.44 · (1 − 1/TBR)	0.84	−0.009	1 − 1/TBR ( partial ); (, additional )