Abstract
Objectives
To propose a novel model-free data-driven approach based on the voxel-wise mapping of DCE-MRI time-intensity-curve (TIC) profiles for quantifying and visualizing hemodynamic heterogeneity and to validate its potential clinical applications.
Materials and methods
From December 2018 to July 2022, 259 patients with 325 pathologically confirmed breast lesions who underwent breast DCE-MRI were retrospectively enrolled. Based on the manually segmented breast lesions, the TIC of each voxel within the 3D whole lesion was classified into 19 subtypes based on wash-in rate (nonenhanced, slow, medium, and fast), wash-out enhancement (persistent, plateau, and decline), and wash-out stability (steady and unsteady), and the composition ratio of these 19 subtypes for each lesion was calculated as a new feature set (type-19). The three-type TIC classification, semiquantitative parameters, and type-19 features were used to build machine learning models for identifying lesion malignancy and classifying histologic grades, proliferation status, and molecular subtypes.
Results
The type-19 feature-based model significantly outperformed models based on the three-type TIC method and semiquantitative parameters both in distinguishing lesion malignancy (respectively; AUC = 0.875 vs. 0.831, p = 0.01 and 0.875vs. 0.804, p = 0.03), predicting tumor proliferation status (AUC = 0.890 vs. 0.548, p = 0.006 and 0.890 vs. 0.596, p = 0.020), but not in predicting histologic grades (p = 0.820 and 0.970).
Conclusion
In addition to conventional methods, the proposed computational approach provides a novel, model-free, data-driven approach to quantify and visualize hemodynamic heterogeneity.
Clinical relevance statement
Voxel-wise intra-lesion mapping of TIC profiles allows for visualization of hemodynamic heterogeneity and its composition ratio for differentiation of malignant and benign breast lesions.
Key Points
• Voxel-wise TIC profiles were mapped, and their composition ratio was compared between various breast lesions.
• The model based on the composition ratio of voxel-wise TIC profiles significantly outperformed the three-type TIC classification model and the semiquantitative parameters model in lesion malignancy differentiation and tumor proliferation status prediction in breast lesions.
• This novel, data-driven approach allows the intuitive visualization and quantification of the hemodynamic heterogeneity of breast lesions.
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Abbreviations
- AUC:
-
Area under the curve
- DCE-MRI:
-
Dynamic contrast-enhanced magnetic resonance imaging
- ROC:
-
Receiver operating characteristic
- ROI:
-
Region of interest
- TIC:
-
Time-intensity curve
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Funding
This study was partially supported by Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province (2020B1212060051), Guangdong Innovation Platform of Translational Research for Cerebrovascular Diseases, Shenzhen Clinical Research Center for Cancer (No. [2021] 287) and Shenzhen High-level Hospital Construction Fund.
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The scientific guarantor of this publication is Na Zhang and Dehong Luo.
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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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Yuming Chen kindly provided statistical advice for this manuscript.
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Due to the retrospective study design, written informed consent from the subjects was waived by the Institutional Review Board.
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• retrospective
• diagnostic or prognostic study
• performed at one institution
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Liu, Z., Yao, B., Wen, J. et al. Voxel-wise mapping of DCE-MRI time-intensity-curve profiles enables visualizing and quantifying hemodynamic heterogeneity in breast lesions. Eur Radiol 34, 182–192 (2024). https://doi.org/10.1007/s00330-023-10102-7
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DOI: https://doi.org/10.1007/s00330-023-10102-7