International Journal of Image, Graphics and Signal Processing (IJIGSP)
IJIGSP Vol. 15, No. 1, 8 Feb. 2023
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Breast Cancer Classification from Ultrasound Images using VGG16 Model based Transfer Learning
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Author(s)
A. B. M. Aowlad Hossain
1,*
Jannatul Kamrun Nisha
1
Fatematuj Johora
1
Index Terms
Breast Cancer Classification, Benign vs. Malignant Tumor, Breast Ultrasound, Deep Transfer Learning, VGG16 Model
Abstract
Ultrasound based breast screening is gaining attention recently especially for dense breast. The technological advancement, cancer awareness, and cost-safety-availability benefits lead rapid rise of breast ultrasound market. The irregular shape, intensity variation, and additional blood vessels of malignant cancer are distinguishable in ultrasound images from the benign phase. However, classification of breast cancer using ultrasound images is a difficult process owing to speckle noise and complex textures of breast. In this paper, a breast cancer classification method is presented using VGG16 model based transfer learning approach. We have used median filter to despeckle the images. The layers for convolution process of the pretrained VGG16 model along with the maxpooling layers have been used as feature extractor and a proposed fully connected two layers deep neural network has been designed as classifier. Adam optimizer is used with learning rate of 0.001 and binary cross-entropy is chosen as the loss function for model optimization. Dropout of hidden layers is used to avoid overfitting. Breast Ultrasound images from two databases (total 897 images) have been combined to train, validate and test the performance and generalization strength of the classifier. Experimental results showed the training accuracy as 98.2% and testing accuracy as 91% for blind testing data with a reduced of computational complexity. Gradient class activation mapping (Grad-CAM) technique has been used to visualize and check the targeted regions localization effort at the final convolutional layer and found as noteworthy. The outcomes of this work might be useful for the clinical applications of breast cancer diagnosis.
Cite This Paper
A. B. M. Aowlad Hossain, Jannatul Kamrun Nisha, Fatematuj Johora, "Breast Cancer Classification from Ultrasound Images using VGG16 Model based Transfer Learning", International Journal of Image, Graphics and Signal Processing(IJIGSP), Vol.15, No.1, pp. 12-22, 2023. DOI:10.5815/ijigsp.2023.01.02
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