Abstract
To investigate the value of combining amplitude of low-frequency fluctuations-based radiomics and the support vector machine classifier method in distinguishing patients with Parkinson’s disease from healthy controls. A total of 123 patients with Parkinson’s disease and 90 healthy controls from three centers with functional and structural MRI images were included in this study. We extracted radiomics features using the Brainnetome 246 atlas from the mean amplitude of low-frequency fluctuations maps. Two-sample t-tests and recursive feature elimination combined with support vector machine method were applied for feature selection and dimensionality reduction. We used support vector machine classifier to construct model and identify the discriminative features. The automated anatomical labeling 90 atlas and fivefold cross-validation were used to evaluate the robustness and generalization of the classifier. We found our model obtained a high classification performance with an accuracy of 78.07%, and AUC, sensitivity, and specificity of 0.8597, 78.80%, and 76.08%, respectively. We detected 7 discriminative brain subregions. The fivefold cross-validation and automated anatomical labeling 90 atlas also got high classification accuracy, and we found Brainnetome 246 atlas achieved a higher classification performance than the automated anatomical labeling 90 atlas both with tenfold and fivefold cross-validation. Our findings may help the early diagnosis of Parkinson’s disease and provide support for research on Parkinson’s disease mechanisms and clinical evaluation.
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Availability of data and material
Data used in this study were obtained from three independent publicly available databases. (1) Dataset 1: Downloaded from http://dx.doi.org/10.6084/m9.figshare.1433996. (2) Dataset 2: Downloaded from http://fcon_1000.projects.nitrc.org/indi/retro/parkinsons.html. (3) Dataset 3: Downloaded from https://doi.org/10.1371/journal.pone.0200623.
Abbreviations
- AAL:
-
Automated anatomical labeling
- ALFF:
-
Amplitude of low-frequency fluctuations
- AUC:
-
Area under curve
- CERR:
-
Computational Environment for Radiotherapy Research
- BOLD:
-
Blood oxygen level-dependent
- DARTEL:
-
Diffeomorphic Anatomical Registration Through Exponentiated Lie Algebra
- EPI:
-
Echo-planar imaging
- HC:
-
Healthy control
- IFG:
-
Inferior frontal gyrus
- MFG:
-
Middle frontal gyrus
- MNI:
-
Montreal Neurologic Institute
- MRI:
-
Magnetic resonance imaging
- PD:
-
Parkinson’s disease
- PhG:
-
Parahippocampal gyrus
- PoG:
-
Postcentral gyrus
- PrG:
-
Precentral gyrus
- ROI:
-
Region of interest
- rs-fMRI:
-
Resting-state functional MRI
- SFG:
-
Superior frontal gyrus
- STG:
-
Superior temporal gyrus
- SVM:
-
Support vector machine
- SVM-RFE:
-
Recursive feature elimination combined with support vector machine
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Acknowledgements
The authors thank the data authors for providing access to the data used in our study. This work is supported by Scientific Research Foundation for Advanced Talents, Xiang'an Hospital of Xiamen University (NO. PM201809170011). We thank Editage Academic Editing for assistance with English editing that greatly improved the manuscript.
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This work is supported by Scientific Research Foundation for Advanced Talents, Xiang'an Hospital of Xiamen University (NO. PM201809170011).
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DS conducted the experiment, performed the data processing and analysis, and wrote the manuscript. XY, YL, HZ, GW and SW collected the data and performed the data processing and analysis.KR supervised the whole including experiments and manuscript writing. All authors contributed to the article and approved the submitted version.
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Shi, D., Yao, X., Li, Y. et al. Classification of Parkinson’s disease using a region-of-interest- and resting-state functional magnetic resonance imaging-based radiomics approach. Brain Imaging and Behavior 16, 2150–2163 (2022). https://doi.org/10.1007/s11682-022-00685-y
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DOI: https://doi.org/10.1007/s11682-022-00685-y