关键词: CT图像, 肺区, 疑似粘连肿瘤, 肋骨轮廓, 样条拟合

Abstract: When existing a relatively large juxta-pleural nodule in lung CT image，because of the lacunas in the segmented lung，the attached nodules may not be distinguishable from the lung.However，since there exist some similarities between the lung’s flank outline area and the rib contours，we can find the growth points of suspicious nodules more precisely by using cubic spline to fit the rib contours at first，then apply regional growth to the combined lung contour image and the rib contour image.The experiment result shows this algorithm can cut the juxta-pleural lung nodules from the CT chest image more effectively.

Key words: CT image, lung area, suspicious juxta-pleural lung nodule, rib contour, spline fitting