Assessment of the Impact of Turbo Factor on Image Quality and Tissue Volumetrics in Brain Magnetic Resonance Imaging Using the Three-Dimensional T1-Weighted (3D T1W) Sequence

Table 4

Contrast-to-noise ratio of WM, GM, GM/WM, and GM/CSF for both right and left hemispheres at different turbo factors.

Volunteer	Turbo factor	Left hemisphere					Right hemisphere
		WM	GM	CSF	GM/WM	GM/CSF	WM	GM	CSF	GM/WM	GM/CSF
1	50				2.152	1.063				2.156	1.058
	100				2.138	1.059				2.099	1.044
	150				2.089	1.061				2.107	1.060
	200				2.105	0.949				2.069	0.996
	225				2.074	1.078				2.095	1.007
2	50				2.215	1.366				2.183	1.267
	100				2.147	1.366				2.136	1.240
	150				2.141	1.315				2.125	1.219
	200				2.139	1.352				2.120	1.274
	225				2.075	1.317				2.079	1.168
3	50				2.448	1.150				2.437	1.141
	100				2.267	1.168				2.292	1.124
	150				2.264	1.199				2.269	1.182
	200				2.327	1.182				2.397	1.113
	225				2.379	1.130				2.395	1.092
4	50				2.310	1.017				2.381	1.030
	100				2.322	1.054				2.397	1.074
	150				2.252	1.007				2.411	1.006
	200				2.249	0.936				2.362	0.997
	225				2.23	0.983				2.320	0.987
5	50				2.274	1.191				2.300	1.130
	100				2.255	1.136				2.310	1.074
	150				2.237	1.141				2.301	1.124
	200				2.253	1.174				2.336	1.144
	225				2.173	1.178				2.244	1.069