CAJ | 학술논문

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。
목적：탐토질대중건(IR)산법재두경부 CT 혈관성상(CTA)중적림상응용개치。방법행두경부 CTA 검사적환자100례,수궤분위 A、B 2조,매조50례。A 조위상규제량소묘(관전압120 kV、관전류300 mAs),용려과반투영법(FBP)진행중건；B 조위저제량소묘[관전압100 kV、자괄응동태관전류(199~399 mAs)],용 IR 진행중건。유2명경험봉부적방사과의생채용쌍맹법대2조도상질량진행평분,병비교단차소묘적 CT 제량지수용적(CTDIvol)화제량장도승적(DLP)。결과A、B 2조적복사제량급도상질량적차이균유통계학의의(P <0.001),B 조적복사제량명현저우 A 조,이 B 조적도상질량명현우우 A 조。결론재두경부CTA 응용중,여상규 FBP 비교,채용 IR 산법가이강저복사제량,동시제고도상질량。
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.