Erschienen in:
01.01.2018 | Neuro
Amide proton transfer imaging for differentiation of benign and atypical meningiomas
verfasst von:
Bio Joo, Kyunghwa Han, Yoon Seong Choi, Seung-Koo Lee, Sung Soo Ahn, Jong Hee Chang, Seok-Gu Kang, Se Hoon Kim, Jinyuan Zhou
Erschienen in:
European Radiology
|
Ausgabe 1/2018
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Abstract
Purpose
To investigate the difference in amide proton transfer (APT)-weighted signals between benign and atypical meningiomas and determine the value of APT imaging for differentiating the two.
Methods
Fifty-seven patients with pathologically diagnosed meningiomas (benign, 44; atypical, 13), who underwent preoperative MRI with APT imaging between December 2014 and August 2016 were included. We compared normalised magnetisation transfer ratio asymmetry (nMTR
asym
) values between benign and atypical meningiomas on APT-weighted images. Conventional MRI features were qualitatively assessed. Both imaging features were evaluated by multivariable logistic regression analysis. The discriminative value of MRI with and without nMTR
asym
was evaluated.
Results
The nMTR
asym
of atypical meningiomas was significantly greater than that of benign meningiomas (2.46% vs. 1.67%; P < 0.001). In conventional MR images, benign and atypical meningiomas exhibited significant differences in maximum tumour diameter, non-skull base location, and heterogeneous enhancement. On multivariable logistic regression analysis, high nMTR
asym
was an independent predictor of atypical meningiomas (adjusted OR, 11.227; P = 0.014). The diagnostic performance of MRI improved with nMTR
asym
for predicting atypical meningiomas.
Conclusion
Atypical meningiomas exhibited significantly higher APT-weighted signal intensities than benign meningiomas. The discriminative value of conventional MRI improved significantly when combined with APT imaging for diagnosis of atypical meningioma.
Key Points
• APT imaging is useful for differentiating between atypical and benign meningiomas.
• Atypical meningiomas exhibited high APT-weighted signal intensity than benign meningiomas.
• The diagnostic performance of MRI improved with nMTR
asym
for predicting atypical meningiomas.