Table 2. Scanner models and parameters resulting in heterogeneous MR image data.

Model	Field strength (Tesla)	Coil	FOV (mm)	Matrix size	Slice thickness (mm)	Repetition time (ms)	Echo time (ms)	Flip angle	Number of slices	Number of scans
Siemens Aera	1.5	Siemens Tx/Rx 15-Channel Knee Coil	140×140	384×384	3	2,790	15	150	27	2
Siemens Avanto	1.5	Siemens CP Extremity	140×140	320×320	3	2,660, 3,190	14, 15	180	25, 30	2
Siemens Espree	1.5	Body	140×140	384×384	3	2,700	11	180	30	1
Siemens Symphony	1.5	Siemens CP Extremity	140×140, 150×150, 160×160	256×256, 320×320	3 4	2,920, 3,000, 3,140, 3,260, 3,400, 3,500, 3,790, 3,920	14, 15, 17	180, 150	23, 24, 27, 28, 30, 31	10
Siemens Trio	3	Siemens 8-Channel Knee Coil	140×140	448×448	2.5	5,970	10	150	40	2
Siemens Verio	3	Siemens 8-Channel Knee Coil	134×140, 154×160	308×320	2.5	3,250, 3,550, 3,620	16	150	35, 38	8
Philips Achieva	1.5	Philips SENSE-Knee-8; SENSE-Flex-M	140×140, 150×150, 186×186	480×480, 528×528, 560×560, 704×704	3	3,312, 3,581, 3,583, 3,589, 3,988	15, 30	90	25, 27, 30	5