Neural Network Evolution Using Expedited Genetic Algorithm for Medical Image Denoising.

Convolutional neural networks offer state-of-the-art performance for medical image denoising. However, their architectures are manually designed for different noise types. The realistic noise in medical images is usually mixed and complicated, and sometimes unknown, leading to challenges in creating effective denoising neural networks. In this paper, we present a Genetic Algorithm (GA)-based network evolution approach to search for the fittest genes to optimize network structures. We expedite the evolutionary process through an experience-based greedy exploration strategy and transfer learning. The experimental results on computed tomography perfusion (CTP) images denoising demonstrate the capability of the method to select the fittest genes for building high-performance networks, named EvoNets, and our results compare favorably with state-of-the-art methods.