title: Classification of suspected liver metastases using fMRI images: a machine learning approach.
abstract: This paper presents a machine-learning approach to the interactive classification of suspected liver metastases in fMRI images. The method uses fMRI-based statistical modeling to characterize colorectal hepatic metastases and follow their early hemodynamical changes. Changes in hepatic hemodynamics are evaluated from T2*-W fMRI images acquired during the breathing of air, air-CO2, and carbogen. A classification model is build to differentiate between tumors and healthy liver tissues. To validate our method, a model was built from 29 mice datasets, and used to classify suspicious regions in 16 new datasets of healthy subjects or subjects with metastases in earlier growth phases. Our experimental results on mice yielded an accuracy of 78% with high precision (88%). This suggests that the method can provide a useful aid for early detection of liver metastases.
authors.affiliation: School of Eng. and Computer Science, The Hebrew Univ. of Jerusalem, Israel. freiman@cs.huji.ac.il
authors.forename: M
authors.initials: M
authors.lastname: Freiman
authors.forename: Y
authors.initials: Y
authors.lastname: Edrei
authors.forename: Y
authors.initials: Y
authors.lastname: Sela
authors.forename: Y
authors.initials: Y
authors.lastname: Shmidmayer
authors.forename: E
authors.initials: E
authors.lastname: Gross
authors.forename: L
authors.initials: L
authors.lastname: Joskowicz
authors.forename: R
authors.initials: R
authors.lastname: Abramovitch
mesh_terms: D000465:Algorithms; D000818:Animals; D001185:Artificial Intelligence; D045744:Cell Line, Tumor; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D051379:Mice; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity