Chemical shift MR imaging in the lumbar vertebra: the effect of field strength, scanner vendors and flip angles in repeatability of signal intensity index measurement

Table 2 Intra- and interobserver agreement for SII measurement with different flip angles

Agreement	Flip angle = 10°		Flip angle = 30°		Flip angle = 50°		Flip angle = 70°
Agreement	Reader 1/First time Reader 2/Second time		Reader 1/First time	Reader 2/Second time	Reader 1/First time Reader 2/Second time		Reader 1/First time Reader 2/Second time
Intra-	0.824	0.881	0.961	0.913	0.926	0.936	0.935	0.896
observer	(0.668, 0.907)	(0.796, 0.941)	(0.944, 0.983)	(0.902, 0.941)	(0.854, 0.963)	(0.879, 0.964)	(0.912, 0.952)	(0.860, 0.923)
Inter-	0.858	0.891	0.969	0.912	0.923	0.971	0.983	0.916
observer	(0.671, 0.914)	(0.815, 0.943)	(0.923, 0.985)	(0.897, 0.937)	(0.852, 0.958)	(0.933, 0.989)	(0.954, 0.995)	(0.885, 0.938)

ISSN: 1471-2342