Automatic scan range for dose-reduced multiphase CT imaging of the liver utilizing CNNs and Gaussian models

Ha Manh Luu, Theo van Walsum, Hong Son Mai, Daniel Robert Franklin, Thi Thu Thao Nguyen, Thi My Le, Adriaan Moelker, Van Khang Le, Dang Luu Vu, Ngoc Ha Le, Tran Quoc Long, Trinh Chu Duc, Nguyen Linh Trung

Abstract: Highlights•We propose an automatic method based on liver detection and liver movement estimation for delineating scan range in multiphase CT imaging of liver cancer patients within a second with high accuracy compared to the best of state-of-the-art methods.•The study was carried out on 657 multiphase 3D CT images from several hospitals in various countries with two different liver cancer intervention applications.•The proposed method can significantly reduce the effect radiation dose inducting to the patients with a mount of 14.5% (2.56 mSv) on average.•Three radiologists from two hospitals assessed both the range-reduced CT images and the original images and independently concluded that no difference is found in their clinical decision-makings when using either of those images.