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Erschienen in: Abdominal Radiology 1/2021

01.07.2020 | Kidneys, Ureters, Bladder, Retroperitoneum

Stratification of cystic renal masses into benign and potentially malignant: applying machine learning to the bosniak classification

verfasst von: Nityanand Miskin, Lei Qin, Shanna A. Matalon, Sree H. Tirumani, Francesco Alessandrino, Stuart G. Silverman, Atul B. Shinagare

Erschienen in: Abdominal Radiology | Ausgabe 1/2021

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Abstract

Purpose

To create a CT texture-based machine learning algorithm that distinguishes benign from potentially malignant cystic renal masses as defined by the Bosniak Classification version 2019.

Methods

In this IRB-approved, HIPAA-compliant study, 4,454 adult patients underwent renal mass protocol CT or CT urography from January 2011 to June 2018. Of these, 257 cystic renal masses were included in the final study cohort. Each mass was independently classified using Bosniak version 2019 by three radiologists, resulting in 185 benign (Bosniak I or II) and 72 potentially malignant (Bosniak IIF, III or IV) masses. Six texture features: mean, standard deviation, mean of positive pixels, entropy, skewness, kurtosis were extracted using commercial software TexRAD (Feedback PLC, Cambridge, UK). Random forest (RF), logistic regression (LR), and support vector machine (SVM) machine learning algorithms were implemented to classify cystic renal masses into the two groups and tested with tenfold cross validations.

Results

Higher mean, standard deviation, mean of positive pixels, entropy, skewness were statistically associated with the potentially malignant group (P ≤ 0.0015 each). Sensitivity, specificity, positive predictive value, negative predictive value, and area under curve of RF model was 0.67, 0.91, 0.75, 0.88, 0.88; of LR model was 0.63, 0.93, 0.78, 0.86, 0.90, and of SVM model was 0.56, 0.91, 0.71, 0.84, 0.89, respectively.

Conclusion

Three CT texture-based machine learning algorithms demonstrated high discriminatory capability in distinguishing benign from potentially malignant cystic renal masses as defined by the Bosniak Classification version 2019. If validated, CT texture-based machine learning algorithms may help reduce interreader variability when applying the Bosniak classification.
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Metadaten
Titel
Stratification of cystic renal masses into benign and potentially malignant: applying machine learning to the bosniak classification
verfasst von
Nityanand Miskin
Lei Qin
Shanna A. Matalon
Sree H. Tirumani
Francesco Alessandrino
Stuart G. Silverman
Atul B. Shinagare
Publikationsdatum
01.07.2020
Verlag
Springer US
Erschienen in
Abdominal Radiology / Ausgabe 1/2021
Print ISSN: 2366-004X
Elektronische ISSN: 2366-0058
DOI
https://doi.org/10.1007/s00261-020-02629-w

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