title: A novel multiinstance learning approach for liver cancer recognition on abdominal CT images based on CPSO-SVM and IO.
abstract: A novel multi-instance learning (MIL) method is proposed to recognize liver cancer with abdominal CT images based on instance optimization (IO) and support vector machine with parameters optimized by a combination algorithm of particle swarm optimization and local optimization (CPSO-SVM). Introducing MIL into liver cancer recognition can solve the problem of multiple regions of interest classification. The images we use in the experiments are liver CT images extracted from abdominal CT images. The proposed method consists of two main steps: (1) obtaining the key instances through IO by texture features and a classification threshold in classification of instances with CPSO-SVM and (2) predicting unknown samples with the key instances and the classification threshold. By extracting the instances equally based on the entire image, the proposed method can ignore the procedure of tumor region segmentation and lower the demand of segmentation accuracy of liver region. The normal SVM method and two MIL algorithms, Citation-kNN algorithm and WEMISVM algorithm, have been chosen as comparing algorithms. The experimental results show that the proposed method can effectively recognize liver cancer images from two kinds of cancer CT images and greatly improve the recognition accuracy.
authors.affiliation: Software College, Northeastern University, Shenyang 110819, China ; Key Laboratory of Medical Image Computing of Ministry of Education, Shenyang 110819, China.
authors.forename: Huiyan
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Software College, Northeastern University, Shenyang 110819, China.
authors.forename: Ruiping
authors.initials: R
authors.lastname: Zheng
authors.affiliation: Department of Hepatobiliary Surgery, First Affiliated Hospital of China Medical University, Shenyang 110001, China.
authors.forename: Dehui
authors.initials: D
authors.lastname: Yi
authors.affiliation: Software College, Northeastern University, Shenyang 110819, China.
authors.forename: Di
authors.initials: D
authors.lastname: Zhao
mesh_terms: D000465:Algorithms; D016477:Artifacts; D001185:Artificial Intelligence; D016208:Databases, Factual; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D010363:Pattern Recognition, Automated / Q000379:methods; D015203:Reproducibility of Results; D012984:Software; D060388:Support Vector Machine; D014057:Tomography, X-Ray Computed / Q000379:methods*