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 5
Median, first quartile, third quartile, and interquartile values for SNR of white matter (WM) and CNR of white matter/gray matter (WM/GM) and gray matter/cerebrospinal fluid (GM/CSF).
Turbo factor
Scan time (mins)
SNR
CNR GM/WM
CNR GM/CSF
EN
Median
Q1
Q3
IQR
Median
Q1
Q3
IQR
Median
Q1
Q3
IQR
Median
Q1
Q3
IQR
50
20 : 25
14.91
14.36
19.98
5.62
2.29
2.20
2.35
0.15
1.15
1.06
1.16
0.10
-7
-15
-6
9
100
10 : 13
15.83
14.79
17.51
2.72
2.28
2.14
2.28
0.14
1.11
1.06
1.15
0.08
-15
-25
-7
18
150
5 : 08
16.41
14.17
16.93
2.76
2.27
2.13
2.27
0.14
1.13
1.06
1.19
0.13
-18
-23
-14
9
200
5 : 08
17.01
14.34
19.33
4.99
2.29
2.13
2.31
0.18
1.15
0.97
1.16
0.19
-13
-19
-8
11
225
5 : 08
15.73
14.32
19.44
5.12
2.21
2.08
2.28
0.19
1.11
1.04
1.12
0.08
-21
-32
-16
16
Note: Q1 = first quartile; Q3 = third quartile; IQR = interquartile range.