TABLE 1

Acquisition and Reconstruction Details

Institution and system	Activity (MBq)	Duration (min)	Reconstruction algorithm (iterations/subsets)	Matrix size (voxels)	Voxel size (mm)
Turku	97^*
Ingenuity TF	82	15	LOR RAMLA (10/33)	128 × 128 × 90	2 × 2 × 2
Discovery 690	48	20	3D OSEM (10/21)	256 × 256 × 47	1.38 × 1.38 × 3.27
Copenhagen	37^*
mMR	26	15	OP OSEM (8/21)	344 × 344 × 127	0.83 × 0.83 × 2
mCT	23	15	OP OSEM (8/24)	344 × 344 × 127	0.83 × 0.83 × 2
Zurich	78^*
Discovery 690	46	20	3D OSEM (3/18)	256 × 256 × 47	1.38 × 1.38 × 3.27
Signa	40	20	3D OSEM (2/28, 10/28)	256 × 256 × 89	1.17 × 1.17 × 2.8
Sapporo	50^*
Gemini TF64	39	15	LOR RAMLA (10/33)	128 × 128 × 90	2 × 2 × 2

↵* Activity at injection time.
LOR = line of response; RAMLA = row action maximum likelihood; OSEM = ordered-subsets expectation maximization; OP = ordinary Poisson.