Artificial intelligence-based classification of bone tumors in the proximal femur on plain radiographs: System development and validation
Fig 7
Gradient-weighted Class Activation Mapping (Grad-CAM) to show which part of the input image led to the classification decision of the deep learning model.
The Grad-CAM revealed that the model classified the images based on the presence of tumors in the proximal part of each proximal femur. (a) Grad-CAM highlights the location of malignant tumor confirmed by magnetic resonance imaging (MRI). (b) Grad-CAM highlights the location of benign tumor confirmed by MRI.