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 3

Signal-to-noise ratio of cerebral white matter and Euler numbers calculated from the various turbo factors for individual volunteers.

Volunteer	Turbo factor	SNR	Euler number
			Left hemisphere	Right hemisphere	Mean
1	50	12.72	-28	-28	-28
	100	12.51	-32	-44	-38
	150	12.44	-22	-24	-23
	200	12.43	-44	-40	-42
	225	12.74	-34	-40	-37
2	50	19.98	-6	-6	-6
	100	18.74	-2	-6	-4
	150	20.4	-14	-4	-9
	200	20.04	-6	-8	-7
	225	19.44	-10	-22	-16
3	50	20.57	-6	-2	-4
	100	17.51	-12	-38	-25
	150	16.93	-26	-32	-29
	200	18.4	-12	-4	-8
	225	21.2	-16	-2	-9
4	50	14.91	-12	-18	-15
	100	15.83	-20	-10	-15
	150	16.41	-22	-14	-18
	200	15.09	-22	-16	-19
	225	15.73	-32	-10	-21
5	50	14.36	-8	-6	-7
	100	14.79	-10	-4	-7
	150	14.17	-8	-20	-14
	200	14.34	-14	-12	-13
	225	14.32	-36	-28	-32