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低剂量CT扫描技术联合IMR技术在乳腺癌术前诊断的应用 预览

Application of Low-dose CT Scanning Combined with IMR Technique in Preoperative Diagnosis of Breast Cancer
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摘要 目的探讨低剂量CT扫描技术联合迭代模型重建(IMR)技术在乳腺癌术前中的应用。方法选择2014年12月至2017年11月于我院进行乳腺癌手术的患者60例,均进行CT乳腺和胸部扫描,分别采用模型迭代重建(IMR)技术和滤波反射投影重建(FBP)技术进行图像重建,比较两种技术客观图像质量[感兴趣区内CT值、噪声(SD)值、对比噪声比(CNR)]、主观图像质量[病灶轮廓、伪影、噪声、图像清晰度]。结果IMR技术乳腺病灶感兴趣区内CT值与FBP技术无显著差异(P >0.05),SD值明显低于FBP技术(P<0.05),CNR明显高于FBP技术(P<0.05)。IMR技术乳腺病灶轮廓、伪影、噪声、图像清晰度评分均明显高于FBP技术(P<0.05)。IMR技术胸部伪影、噪声、图像清晰度评分均明显高于FBP技术(P<0.05)。CT扫描总剂量为(5.21±1.06)mGy,总ED为(2.20±0.41)mSy;乳腺动态扫描总剂量为(1.68±0.49)mGy,ED为(0.63±0.19)mSy。结论低剂量CT扫描技术联合IMR技术具有较好图像质量,对乳腺癌术前评估具有重要临床价值。 Objective To explore the application of low-dose CT scanning combined with iterative model reconstruction(IMR)technique in preoperative diagnosis of breast cancer.Methods A total of 60 cases of breast cancer in our hospital from December 2014 to November 2017 were selected and given CT scanning of breast and chest.Image reconstruction was carried out by using iterative model reconstruction(IMR)and filtered back-projection reconstruction(FBP)respectively.The objective image quality[CT value,noise(SD)value and contrast noise ratio(CNR)of regions of interest]and subjective image quality[lesion contour,artifact,noise and image definition]were compared between the two technologies.Results There was no significant difference in the CT value of breast regions of interest between the IMR technique and the FBP technique(P >0.05),and the SD value was significantly lower than that of the FBP technique(P<0.05)while the CNR was significantly higher than that of the FBP technique(P<0.05).The scores of lesion contour,artifact,noise and image definition of breast by the IMR technique were significantly higher than those by the FBP technique(P<0.05).The scores of artifact,noise and image definition of chest by the IMR technique were significantly higher than those by the FBP technique(P<0.05).The total dose of CT scanning was(5.21±1.06)mGy,and the total ED was(2.20±0.41)mSy.The total dose of breast dynamic scan was(1.68±0.49)mGy,and the ED was(0.63±0.19)mSy.Conclusion Low-dose CT scanning combined with IMR technique has good image quality and has important clinical value in preoperative assessment of breast cancer.
作者 王天义 WANG Tian-yi(Department of Surgery,Jiaozuo Maternal and Child Health Hospital,Jiaozuo 454000,Henan Province,China)
出处 《中国CT和MRI杂志》 2019年第2期9-11,共3页
关键词 低剂量CT 迭代模型重建 乳腺癌 图像质量 Low-dose CT Scanning Iterative Model Reconstruction Breast Cancer Image Quality
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