计算机科学 ›› 2022, Vol. 49 ›› Issue (6A): 54-59.doi: 10.11896/jsjkx.210400211
岳晴1, 尹健宇2, 王生生2
YUE Qing1, YIN Jian-yu2, WANG Sheng-sheng2
摘要: 随着空气污染日益严重,肺癌已成为发病率和死亡率增长速度最快的恶性肿瘤之一,严重危害人们的生命和健康。肺癌早期主要表现为肺结节的形式,如果在肺癌早期能够及时发现并治疗,将能够提高肺癌的治疗效果。低剂量螺旋CT具有采集速度快、成本低、辐射低的特点,因此被大量应用于对肺结节的诊断。目前,CT图像的诊断多采用传统的人工诊断方式与CAD系统诊断的方式,但这两种方式存在精确性低、泛化性差的缺点。针对上述问题,文中以医学辅助诊断领域中的肺结节检测问题为研究对象,提出了一种基于改进CNN的低剂量CT图像的肺结节自动检测算法。首先,对CT图像进行预处理,提取肺实质;其次,对cascade-rcnn候选结节筛选网络进行改进,以提取更高质量的目标;然后,提出了改进3D CNN的假阳性减少网络,提高了结节分类的准确性;最后,在LUNA16数据集上进行了实验,结果表明,与现有算法相比,所提算法在检测准确率上有所提升。
中图分类号:
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