Prognostic analysis of curatively resected pancreatic cancer using harmonized positron emission tomography radiomic features

EJNMMI Reports

Table 2 Specifications of the four PET scanners used in this study

	Discovery IQ	Discovery 600	Discovery ST	Gemini TF
Matrix size	192 × 192	192 × 192	128 × 128	144 × 144
Slice thickness	3.26 mm	3.27 mm	3.27 mm	4 mm
Pixel size	2.6 mm	2.6 mm	4.7 mm	4 mm
FOV	500 mm	500 mm	600 mm	576 mm
Reconstruction	QCHD	VPHDS	VPHD	BLOB-OS-TF
Subset/iteration	Not available^a	16/3	21/2	33/3
Acquisition time (min/bed)	2–2.5 (2.5)^b	1.5–3 (2.5)^b	2 (2)^b	2 (2)^b
Postfiltering FWHM (mm)	Not available	3	4.29	Not available

BLOB-OS-TF blob ordered-subsets time-of-flight, FOV field of view, FWHM full width at half maximum, PET positron emission tomography, QCHD Q. Clear HD (a type of Bayesian penalized likelihood, GE Healthcare), VPHD VUE-point HD, VPHDS VPHD with point spread function
^aThe definition of the number of subsets and its iteration does not exist in Bayesian penalized likelihood reconstruction because of its regularization algorithm
^bThe median acquisition time of the scanner is described in parentheses