Abstract
Objective
To assess whether ADC maps obtained from high b value DWI were more valuable in preoperatively evaluating the grade, Ki-67 index and outcome of gliomas.
Methods
Sixty-three patients with gliomas, who underwent preoperative multi b value DWI at 3 T, were enrolled. The ADC1000, ADC2000 and ADC3000 maps were generated. Receiver operating characteristic analyses were conducted to determine the area under the curve (AUC) in differentiating high-grade gliomas (HGG) from low-grade gliomas (LGG). Pearson correlation coefficients (R value) were calculated to investigate the correlation between parameters with the Ki-67 proliferation index. Survival analysis was conducted by using Cox regression.
Results
The AUC of the mean ADC1000 value (0.820) was lower than that of the mean ADC2000 value (0.847) and mean ADC3000 value (0.875) in differentiating HGG from LGG. The R value of the mean ADC1000 value (−0.499) was less negative than that of the mean ADC2000 value (−0.530) and mean ADC3000 value (−0.567). The mean ADC3000 value was an independent prognosis factor for gliomas (p = 0.008), while the mean ADC1000 and ADC2000 values were not.
Conclusion
ADC maps obtained from high b value DWI might be a better imaging biomarker in the preoperative evaluation of gliomas.
Key Points
• ADC 3000 maps could improve the differentiation between HGG and LGG.
• The mean ADC 3000 value had a closer correlation with the Ki-67 index.
• The mean ADC 3000 value was an independent prognosis factor for gliomas.
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- AUC:
-
Area under the curve
- DWI:
-
Diffusion-weighted imaging
- HGG:
-
High-grade gliomas
- LGG:
-
Low-grade gliomas
- NSA:
-
Number of scan averages
- ROC:
-
Receiver operating characteristic
- ROI:
-
Region of interest
- SNR:
-
Signal-to-noise ratio
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The scientific guarantor of this publication is Jianmin Zhang.
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The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
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The authors state that this work has not received any funding.
Statistics and biometry
No complex statistical methods were necessary for this paper.
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Written informed consent was obtained from all subjects (patients) in this study.
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Institutional review board approval was obtained.
Methodology
•retrospective
•diagnostic or prognostic study
•performed at one institution
Additional information
Qiang Zeng and Fei Dong contributed equally to this work.
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Zeng, Q., Dong, F., Shi, F. et al. Apparent diffusion coefficient maps obtained from high b value diffusion-weighted imaging in the preoperative evaluation of gliomas at 3T: comparison with standard b value diffusion-weighted imaging. Eur Radiol 27, 5309–5315 (2017). https://doi.org/10.1007/s00330-017-4910-0
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DOI: https://doi.org/10.1007/s00330-017-4910-0