Chen Lihong, Chen Gongting, Zhao Pan, Wang Huan, Liu Bing, Chun Jiahao, Hao Yanhui, Pan Ning, Jian Zhijie, Guo Jianxin
Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China.
Bayer Healthcare Company Limited, Xi'an, 710061, China.
Jpn J Radiol. 2025 May 16. doi: 10.1007/s11604-025-01801-w.
To evaluate the effect of a whole-heart motion correction algorithm (Snapshot freeze 2, SSF2) on image quality, calcium score, and risk category classification of non-contrast-enhanced cardiac CT.
Sixty-one coronary calcium scoring scans performed on a 256-row detector CT were included. Images of standard reconstruction without motion-corrected (STD) and with SSF2 were compared. The image quality was graded by consensus of two experienced radiologists using a four-point Likert scale. The diameter of the major and minor axes at the heaviest point of a dominant calcification, as well as its volume, were measured. The Agatston score, volume score, and corresponding risk category for each patient were recorded. Paired t test, Wilcoxon test, and Bland-Altman plot were used for statistical analysis.
Image quality was significantly improved with SSF2 (P < 0.001). The mean diameters of the major and minor axes were 10.5 ± 5.3 mm and 6.4 ± 6.8 mm for STD images, and 7.2 ± 4.6 mm and 4.2 ± 5.5 mm for SSF2 images, resulting in a mean volume of 149.6 ± 206.1mm and 118.7 ± 184.6mm, respectively (all P < 0.001). The mean Agatston score and volume score for STD images were 493.9 ± 585.9 and 415.7 ± 478.4, respectively, and decreased to 409.8 ± 505.4 and 337.7 ± 399.7, respectively, after motion correction (P < 0.001). The risk category changed significantly as 8 (13.1%) and 10 (16.4%) patients, were downgraded after motion correction based on either Agatston score (P = 0.008) or volume score (P = 0.002), respectively.
Motion correction with SSF2 in non-contrast-enhanced cardiac CT improves the image quality at both the patient and lesion level, resulting in a significant reduction in calcium score and risk category downgrade.
评估全心脏运动校正算法（Snapshot freeze 2，SSF2）对非增强心脏CT的图像质量、钙化积分及风险类别分类的影响。
纳入在256排探测器CT上进行的61例冠状动脉钙化积分扫描。比较未进行运动校正的标准重建图像（STD）和采用SSF2的图像。由两名经验丰富的放射科医生通过四点李克特量表达成共识对图像质量进行分级。测量主要钙化最严重处的长轴和短轴直径及其体积。记录每位患者的阿加斯顿积分、体积积分及相应的风险类别。采用配对t检验、威尔科克森检验和布兰德-奥特曼图进行统计分析。
采用SSF2后图像质量显著改善（P < 0.001）。STD图像的长轴和短轴平均直径分别为10.5±5.3 mm和6.4±6.8 mm，SSF2图像分别为7.2±4.6 mm和4.2±5.5 mm，平均体积分别为149.6±206.1mm和118.7±184.6mm（均P < 0.001）。STD图像的平均阿加斯顿积分和体积积分分别为493.9±585.9和415.7±478.4，运动校正后分别降至409.8±505.4和337.7±399.7（P < 0.001）。基于阿加斯顿积分（P = 0.008）或体积积分（P = 0.002），分别有8例（13.1%）和10例（16.4%）患者在运动校正后风险类别降低，风险类别发生显著变化。
在非增强心脏CT中采用SSF2进行运动校正可改善患者和病变层面的图像质量，显著降低钙化积分并降低风险类别。
