诊断学理论与实践 ›› 2022, Vol. 21 ›› Issue (03): 380-384.doi: 10.16150/j.1671-2870.2022.03.015
收稿日期:
2022-05-21
出版日期:
2022-06-25
发布日期:
2022-08-17
通讯作者:
张伟华
E-mail:zwh40443@rjh.com.cn
ZHOU Huiyun, LÜ Xiaoyu, LI Jiqiang, DONG Haipeng, ZHANG Weihua()
Received:
2022-05-21
Online:
2022-06-25
Published:
2022-08-17
Contact:
ZHANG Weihua
E-mail:zwh40443@rjh.com.cn
摘要:
目的:评估迭代去金属伪影(iterative metal artifact reduction,iMAR)技术在去除腹部金属植入物伪影对CT图像质量改善中的应用价值。方法:回顾性收集32例有腹部金属植入物的受检者的CT图像,分别采用iMAR和滤波反向投影(filtered back projection,FBP)2种算法进行重建,由2名放射科医师对图像进行主观质量评分,比较2种算法获得图像间的质量评分差异。测量2种算法处理后金属植入物附近伪影最严重层面的噪声值,计算图像信噪比(signal-to-noise ratio,SNR)、对比度噪声比(contrast-to-noise ratio,CNR)和伪影指数(artifact index,AI),并比较2种算法间以上指标差异及测量间的一致性。结果:iMAR算法重建图像的主观质量评分明显高于FBP算法,差异有统计学意义(S=232.500,P<0.050)。iMAR重建图像的SNR及CNR明显高于FBP重建图像,差异有统计学意义(SNR,1.890±1.864比0.720±1.384, P=0.002; CNR,35.872±13.154比15.245±12.362, P<0.050);iMAR重建图像的AI明显低于FBP重建图像,差异有统计学意义(32.690±15.694比152.594±117.203, P<0.050)。结论:iMAR技术能够明显减少腹部植入物金属伪影对图像的影响,可改善图像质量,具有良好的临床应用价值。
中图分类号:
周慧赟, 吕晓宇, 李纪强, 董海鹏, 张伟华. iMAR在腹部金属植入物伪影去除中的应用价值[J]. 诊断学理论与实践, 2022, 21(03): 380-384.
ZHOU Huiyun, LÜ Xiaoyu, LI Jiqiang, DONG Haipeng, ZHANG Weihua. Application value of iMAR algorithm in reducing metal artifacts from abdominal implants[J]. Journal of Diagnostics Concepts & Practice, 2022, 21(03): 380-384.
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