No. | T1WIa | FS T2WIb,c | CEd | |||||
---|---|---|---|---|---|---|---|---|
Isointense | Mixed | Isointense | Hyperintense | Mixed | Homo | Hetero | ||
Inflammation | 14 | 8 | 6 | 0 | 6 | 8 | 1 | 11 |
Benign | 19 | 13 | 6 | 3 | 2 | 14 | 2 | 10 |
Malignant | 28 | 23 | 5 | 6 | 0 | 22 | 8 | 19 |
a Lesions were categorized into those with isointense or mixed signals relative to the neighboring muscles.
b Lesions were categorized into those with isointense or mixed signals relative to the cerebral cortex.
c Differences in distributions were significant between inflammatory and benign lesions (P = .0494), and between inflammatory and malignant lesions (P = .0004), but not between benign and malignant lesions (P = .2049) (χ2 test).
d CE MR imaging was performed in 12 inflammatory, 12 benign, and 27 malignant lesions, and the lesions were categorized as homogeneously or heterogeneously enhancing after gadolinium injection.