Utility of second-generation single-energy metal artifact reduction in helical lung computed tomography for patients with pulmonary arteriovenous malformation after coil embolization
Utility of second-generation single-energy metal artifact reduction in helical lung computed tomography for patients with pulmonary arteriovenous malformation after coil embolization
复制标题
第二代单能金属伪影减少螺旋肺CT在弹簧圈栓塞后肺动静脉畸形患者中的应用
DOI：
10.1007/s11604-018-0723-6
复制
发表时间：
2018
影响因子：
2.1
通讯作者：
S. Kanazawa
中科院分区：
文献类型：
--
作者：
Y. Asano;A. Tada;Takayoshi Shinya;Y. Masaoka;T. Iguchi;Shuhei Sato;S. Kanazawa
目的回顾性评价单能量金属伪影消除（SEMAR）技术在螺旋CT肺动静脉畸形（PAVM）栓塞术后的图像质量。评价了27个病灶[20名患者（2名男性，18名女性），平均年龄61.2 ± 11.0岁;栓塞弹簧圈数量，9.8 ± 5.0]的对比增强CT和18个病灶的非增强肺CT。将感兴趣区域定位在线圈周围，并将平均标准差值作为噪声指标进行比较。两名放射科医生使用四点量表对金属线圈伪影进行视觉评估：4 =最小; 3 =轻度; 2 =强烈; 1 =广泛。（中位数[四分位距]; 194.4 [161.6-211.9] Hounsfield单位[HU] vs. 243.9 [220.4-286.0] HU;p< 0.001）。使用SEMAR与不使用SEMAR相比，视觉评分显著改善（阅片人1，3 [3] vs.1 [1];阅片人2，3 [3] vs.1 [1];p< 0.001）。结论SEMAR可为PAVM弹簧圈栓塞患者提供清晰的胸部CT图像。
PurposeThe quality of images acquired using single-energy metal artifact reduction (SEMAR) on helical lung computed tomography (CT) in patients with pulmonary arteriovenous malformation (PAVM) after coil embolization was retrospectively evaluated.Materials and methodsCT images were reconstructed with and without SEMAR. Twenty-seven lesions [20 patients (2 males, 18 females), mean age 61.2 ± 11.0 years; number of embolization coils, 9.8 ± 5.0] on contrast-enhanced CT and 18 lesions of non-enhanced lung CT concurrently performed were evaluated. Regions of interest were positioned around the coils and mean standard deviation value was compared as noise index. Two radiologists visually evaluated metallic coil artifacts using a four-point scale: 4 = minimal; 3 = mild; 2 = strong; 1 = extensive.ResultsNoise index was significantly improved with SEMAR versus without SEMAR (median [interquartile range]; 194.4 [161.6–211.9] Hounsfield units [HU] vs. 243.9 [220.4–286.0] HU;p< 0.001). Visual score was significantly improved with SEMAR versus without SEMAR (Reader 1, 3 [3] vs.1 [1]; Reader 2, 3 [3] vs.1 [1];p< 0.001). Significant differences were similarly demonstrated on lung CT (p< 0.001).ConclusionSEMAR provided clear chest CT images in patients who underwent PAVM coil embolization.