Preoperative Quantitative MR Tractography Compared with Visual Tract Evaluation in Patients with Neuropathologically Confirmed Gliomas Grades II and III: A Prospective Cohort Study
Table 2
Results from tractography, fractional anisotropy.
Track
Corticospinal tract
p
Corticospinal tract
p
Corticospinal tract
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Segment 3
Infiltrated tract segment
n = 8
0.96 (0.03)
0.006135
n = 8
0.93 (0.06)
0.021797
n = 8
0.95 (0.08)
0.138
Not infiltrated tract segment
n = 26
1.01 (0.05)
n = 26
1.00 (0.06)
n = 26
1.01 (0.08)
Track
Inferior frontooccipital fasciculus
p
Inferior frontooccipital fasciculus
p
Inferior frontooccipital fasciculus
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Segment 3
Infiltrated tract segment
n = 14
0.80 (0.14)
0.00029
n = 15
0.74 (0.16)
0.000027
n = 14
0.89 (0.11)
0.000218
Not infiltrated tract segment
n = 19
0.99 (0.07)
n = 19
0.98 (0.08)
n = 19
1.03 (0.06)
Track
Cingulum
p
Cingulum
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Infiltrated tract segment
n = 4
0.64 (0.16)
0.004241
n = 4
0.58 (0.22)
0.001471
Not infiltrated tract segment
n = 30
1.02 (0.17)
n = 30
1.03 (0.07)
Track
Parahippocampal cg
p
Parahippocampal cg
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Infiltrated tract segment
n = 5
0.61 (0.21)
0.002188
n = 5
0.55 (0.14)
0.000463
Not infiltrated tract segment
n = 29
0.98 (0.10)
n = 29
0.98 (0.11)
Track
Arcuate fasciculus
p
Arcuate fasciculus
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Infiltrated tract segment
n = 12
0.76 (0.16)
0.000386
n = 10
0.76 (0.11)
0.000026
Not infiltrated tract segment
n = 22
0.98 (0.06)
n = 21
1.00 (0.07)
Track
Inferior longitudinal fasciculus
p
Inferior longitudinal fasciculus
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Infiltrated tract segment
n = 8
0.75 (0.18)
0.000173
n = 8
0.84 (0.09)
0.000173
Not infiltrated tract segment
n = 26
0.99 (0.08)
n = 26
1.00 (0.07)
Track
Uncinate fasciculus
p
Uncinate fasciculus
p
DTI scalars
rFA mean (SD)
rFA mean (SD)
Segment
Segment 1
Segment 2
Infiltrated tract segment
n = 12
0.76 (0.09)
0.000003
n = 12
0.77 (0.18)
0.001058
Not infiltrated tract segment
n = 21
1.01 (0.08)
n = 21
1.00 (0.10)
Track
Fornix
p
Fornix
p
DTI scalars
FA ratio
rFA mean (SD)
Segment
1, midline
Segment 2
Infiltrated tract segment
NA
NA
NA
n = 2
0.88 (0.10)
0.056
Not infiltrated tract segment
NA
NA
NA
n = 30
1.02 (0.09)
Track
Callosal body minor forceps
p
DTI scalars
rFA mean (SD)
Segment
Segment 1
Infiltrated tract segment
n = 9
0.88 (0.12)
0.00301
Not infiltrated tract segment
n = 25
1.01 (0.05)
No ratio due to tract segment in midline. rFA in infiltrated and not infiltrated tract segment presented as mean and standard deviation with results from Mann-Whitney tests. was regarded as statistically significant. rFA = relative fractional anisotropy (ipsilateral mean FA/contralateral mean FA), SD = standard deviation, cg = cingulum, and NA = not available.
