Long-Wen Chang Huan-Chau Hwang Finding the Rib Cage from Chest X-Ray Images by Inexact Hough Transform. 1-15 1989 5 J. Inf. Sci. Eng. 1 http://www.iis.sinica.edu.tw/page/jise/1989/198901_01.html db/journals/jise/jise5.html#ChangH89