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Application of MR morphologic, diffusion tensor, and perfusion imaging in the classification of brain tumors using machine learning scheme

  • Diagnostic Neuroradiology
  • Published:
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Abstract

Purpose

While MRI is the modality of choice for the assessment of patients with brain tumors, differentiation between various tumors based on their imaging characteristics might be challenging due to overlapping imaging features. The purpose of this study was to apply a machine learning scheme using basic and advanced MR sequences for distinguishing different types of brain tumors.

Methods

The study cohort included 141 patients (41 glioblastoma, 38 metastasis, 50 meningioma, and 12 primary central nervous system lymphoma). A computer-assisted classification scheme, combining morphologic MRI, perfusion MRI, and DTI metrics, was developed and used for tumor classification. The proposed multistep scheme consists of pre-processing, ROI definition, features extraction, feature selection, and classification. Feature subset selection was performed using support vector machines (SVMs). Classification performance was assessed by leave-one-out cross-validation. Given an ROI, the entire classification process was done automatically via computer and without any human intervention.

Results

A binary hierarchical classification tree was chosen. In the first step, selected features were chosen for distinguishing glioblastoma from the remaining three classes, followed by separation of meningioma from metastasis and PCNSL, and then to discriminate PCNSL from metastasis. The binary SVM classification accuracy, sensitivity and specificity for glioblastoma, metastasis, meningiomas, and primary central nervous system lymphoma were 95.7, 81.6, and 91.2%; 92.7, 95.1, and 93.6%; 97, 90.8, and 58.3%; and 91.5, 90, and 96.9%, respectively.

Conclusion

A machine learning scheme using data from anatomical and advanced MRI sequences resulted in high-performance automatic tumor classification algorithm. Such a scheme can be integrated into clinical decision support systems to optimize tumor classification.

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Funding

No funding was received for this study.

Author information

Authors and Affiliations

  1. Department of Diagnostic Imaging, Sheba Medical Center, Ramat-Gan, Israel, 2 Sheba Rd, 52621, Ramat Gan, Israel

    Shai Shrot, Eli Konen & Chen Hoffmann

  2. Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel

    Shai Shrot, Eli Konen & Chen Hoffmann

  3. School of Computer Science, Tel Aviv University, Tel Aviv, Israel

    Moshe Salhov, Nir Dvorski & Amir Averbuch

Authors
  1. Shai Shrot
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  2. Moshe Salhov
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  3. Nir Dvorski
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  4. Eli Konen
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  5. Amir Averbuch
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  6. Chen Hoffmann
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Corresponding author

Correspondence to Shai Shrot.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

The study was approved by the institutional research committee.

Informed consent

A wavier for informed consent was approved by institutional research committee.

Additional information

SS and MS have collaborated on this project: SS was responsible for the study design, data collection and part of the pre-processing; MS was responsible for the computational aspect of analysis and for development of the diagnostic model. Both authors took substantial part in the submitted manuscript.

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Shrot, S., Salhov, M., Dvorski, N. et al. Application of MR morphologic, diffusion tensor, and perfusion imaging in the classification of brain tumors using machine learning scheme. Neuroradiology 61, 757–765 (2019). https://doi.org/10.1007/s00234-019-02195-z

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  • DOI: https://doi.org/10.1007/s00234-019-02195-z

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