학술논문
迭代重建算法在头颈部 CT 血管成像中的临床应用价值 / The clinical application of iterative reconstruction in the head and neck CT angiography
Document Type
Academic Journal
Author
侯代伦; 孙小丽; 王仁贵; 温廷国; 杨磊; 段永利; HOU Dailun; SUN Xiaoli; WANG Rengui; WEN Tingguo; YANG Lei; DUAN Yongli
Source
实用放射学杂志 / Journal of Practical Radiology. (12):2065-2071
Subject
Language
Chinese
ISSN
1002-1671
Abstract
目的：探讨迭代重建(IR)算法在头颈部 CT 血管成像(CTA)中的临床应用价值。方法行头颈部 CTA 检查的患者100例,随机分为 A、B 2组,每组50例。A 组为常规剂量扫描(管电压120 kV、管电流300 mAs),用滤过反投影法(FBP)进行重建；B 组为低剂量扫描[管电压100 kV、自适应动态管电流(199~399 mAs)],用 IR 进行重建。由2名经验丰富的放射科医生采用双盲法对2组图像质量进行评分,并比较单次扫描的 CT 剂量指数容积(CTDIvol)和剂量长度乘积(DLP)。结果A、B 2组的辐射剂量及图像质量的差异均有统计学意义(P <0.001),B 组的辐射剂量明显低于 A 组,而 B 组的图像质量明显优于 A 组。结论在头颈部CTA 应用中,与常规 FBP 比较,采用 IR 算法可以降低辐射剂量,同时提高图像质量。
Objective To assess the clinical application of iterative reconstruction (IR)in the head and neck CT angiography (CTA).Methods 100 patients who underwent the head and neck CTA examination were divided into Group A and Group B at ran-dom.Each group included 50 patients.Group A was performed the conventional-dose scan method (tube voltage 120 kV,tube cur-rent 300 mAs),and images were reconstructed with filtered back projection (FBP);Group B was performed the low-dose scan method [tube voltage 100 kV,dynamic tube current (1 99-399 mAs)],and images were reconstructed with IR.Two experienced radiology physicians reviewed the results of image quality using double blind method,and compared CT dose index volume (CTDIvol)and dose-length product (DLP).Results There were significant differences between radiation dose and image quality of the two groups (P <0.001).Radiation dose of Group B was significantly lower than that of Group A,while image quality of Group B was significantly better than that of Group A.Conclusion In the head and neck CTA applications,compared with FBP,IR recon-struction can reduce radiation dose and improve image quality.
Objective To assess the clinical application of iterative reconstruction (IR)in the head and neck CT angiography (CTA).Methods 100 patients who underwent the head and neck CTA examination were divided into Group A and Group B at ran-dom.Each group included 50 patients.Group A was performed the conventional-dose scan method (tube voltage 120 kV,tube cur-rent 300 mAs),and images were reconstructed with filtered back projection (FBP);Group B was performed the low-dose scan method [tube voltage 100 kV,dynamic tube current (1 99-399 mAs)],and images were reconstructed with IR.Two experienced radiology physicians reviewed the results of image quality using double blind method,and compared CT dose index volume (CTDIvol)and dose-length product (DLP).Results There were significant differences between radiation dose and image quality of the two groups (P <0.001).Radiation dose of Group B was significantly lower than that of Group A,while image quality of Group B was significantly better than that of Group A.Conclusion In the head and neck CTA applications,compared with FBP,IR recon-struction can reduce radiation dose and improve image quality.