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Abstract #1472

Integration of Slice-Based Diagnostic Probabilities Predicted by 2D Deep Learning Using ResNet50 to Yield Lesion-Based Diagnosis in Breast MRI

Yang Zhang1,2, Jiejie Zhou3, Zhongwei Chen3, You-Fan Zhao3, Meihao Wang3, Yan-Lin Liu2, Jeon-Hor Chen2, Ke Nie1, and Min-Ying Su2
1Department of Radiation Oncology, Rutgers-Cancer Institute of New Jersey, New Brunswick, NJ, United States, 2Department of Radiological Sciences, University of California, Irvine, CA, United States, 3Department of Radiology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China

Synopsis

Keywords: Cancer, Machine Learning/Artificial IntelligenceA deep learning model using 2D ResNet50 CNN was trained to differentiate a dataset of 103 malignant vs 73 benign breast lesions, then tested in a testing dataset of 53 malignant and 31 benign cases. The 2D slice-based results were used to calculate a probability for each lesion, by using 5 methods: (1) slice-based average, (2) tumor area weighted average, (3) tumor perimeter weighted average, (4) using the probability of the largest tumor slice, (5) using the highest probability among all slices. The results showed using the highest probability to convert from slice-based to lesion-based diagnosis had the best performance.

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