Table 1.

Reconstruction parameters for the scanners used

Scanner	Matrix	Voxel size (column, row, slice thickness) (mm)	Reconstruction	Scatter correction	Random correction
GE Healthcare STE	128	4.6875 × 4.6875 × 3.27	OSEM	Convolution subtraction	Singles
GE Healthcare Discovery 690	192	3.65 × 3.65 × 3.27	VPFX	Model based	Singles
GE Healthcare Discovery 710	192	3.65 × 3.65 × 3.27	VPFX	Model based	Singles
Philips Gemini TF64	144 or 169	4 × 4 × 4	BLOB-OS-TF	SS-Simul	DLYD

DLYD, delayed event subtraction; OSEM, ordered subsets expectation maximisation; SS-Simul, single-scatter simulation; VPFX, Vue Point FX (3D Time of Flight); BLOB-OS-TF, a 3D ordered subset iterative TOF reconstruction algorithm (spherically symmetric basis function ordered subset)