能谱CT金属伪影抑制算法在胸部穿刺活检中的应用价值  

The Value of Spectrum CT Metal Artifact Suppression Algorithm in Chest Puncture Biopsy

作　　者：何亮[1] 唐彩银 张继 田为中 朱鹏飞[1] HE Liang;Tang Cai-yin;Zhang Ji;Tian Wei-zhong;Zhu Peng-fei(Department of Radiology,The Affiliated Taizhou People's Hospital of Nanjing Medical University,Taizhou 225300,Jiangsu Province,China;Taizhou Hospital,The affiliated Hospital of Jiangsu Vocational College of Medicine,Taizhou 225300,Jiangsu Province,China)

机构地区：[1]南京医科大学附属泰州人民医院医学影像科,江苏泰州225300 [2]江苏医药职业学院泰州临床学院,江苏泰州225300

出　　处：《中国CT和MRI杂志》2023年第11期50-52,共3页Chinese Journal of CT and MRI

基　　金：江苏医药职业学院校外教学基地科研发展专项课题(20229109)。

摘　　要：目的评价能谱CT金属伪影抑制算法对胸部穿刺针金属伪影的抑制效果。方法回顾性分析行胸部穿刺活检的66例患者,按CT扫描模式分为能谱扫描组(32例)及常规扫描组(34例)。记录常规扫描组和能谱扫描组的辐射剂量。将能谱扫描组中使用MAR算法和不使用MAR算法重建的图像,记为能谱MAR组和能谱非MAR组。分别测量各组图像无伪影区域和金属伪影区域的CT值和SD值,计算出信噪比SNR和伪影指数AI。并由两名放射医师对伪影区域的图像质量进行主观评分。结果常规扫描组和能谱扫描组的CT剂量指数(CTDI)分别为(4.83±0.07)、4.73mGy,差异具有统计学意义(P<0.01)。能谱MAR组和能谱非MAR组的伪影指数AI分别为54.21±33.99、167.47±100.89,伪影区域图像质量的主观评分为(1.86±0.51)分、(0.72±0.73)分,差异具有统计学意义(P<0.01)。结论能谱CT金属伪影抑制算法能有效减少穿刺针尖处的金属伪影,提高组织结构清晰度。Objective To evaluate the effect of spectrum CT metal artifact suppression(MAR)algorithm in reducing artifacts of chest puncture needle.Methods 66 patients underwent chest puncture biopsy were analyzed retrospectively and divided into spectrum scan group(32 patients)and conventional scan group(34 patients)according to CT scan mode.The radiation dose was recorded in the two groups.The images reconstructed with and without MAR algorithm in the spectrum CT scan group are recorded as the spectrum MAR group and the spectrum non-MAR group.The CT and SD values of artifact-free area and metal artifact area of each group were measured respectively,and the signal-tonoise ratio(SNR)and artifact index(AI)were calculated.The image quality of the metal artifact area was subjectively evaluated by two radiologists.Results The CT dose index(CTDI)of conventional scan group and spectrum scan group were 4.83±0.07,4.73mGy,and the difference is statistically significant(t=8.589、P<0.01).The artifact index AI of spectrum MAR group and spectrum non-MAR group were 54.21±33.99,167.47±100.89,and the subjective scores of image quality in artifact areas were 1.86±0.51 and 0.72±0.73,the difference is statistically significant(P<0.01).Conclusion Spectrum CT metal artifact suppression algorithm can effectively reduce the metal artifacts at the tip of the puncture needle and improve the clarity of tissue structure.

关 键 词：能谱CT 金属伪影 MAR算法 胸部穿刺 

分 类 号：R4[医药卫生—临床医学]