SCAPIS复查中光子计数探测器CT改善冠状动脉CTA图像质量：扫描方案与对比分析
本研究描述了SCAPIS复查中基于光子计数探测器CT（PCD-CT）的冠状动脉CTA扫描方案，并与基线能量积分探测器CT（EID-CT）比较诊断图像质量。结果显示PCD-CT组完全诊断图像质量比例更高（90% vs 78%，p<0.001），尽管钙化负荷更高；在匹配样本中Agatston评分分布相似，但约30%基线≥50%狭窄者复查时被重新分类为<50%。
要点
- PCD-CT扫描方案可提高冠状动脉CTA完全诊断图像质量比例，高钙化积分者获益更明显。
- Agatston评分在PCD-CT与EID-CT间具有可比性，但狭窄分级可能存在差异。
- 对于基线≥50%狭窄者，复查时约30%被重新分类为<50%，需注意随访中的分级变化。
关键影像表现/征象
- PCD-CT组完全诊断图像质量比例90%（1,036/1,147），基线EID-CT组78%（20,468/26,188），p<0.001。
- Agatston评分>400者中，PCD-CT组完全诊断图像质量77%（89/116），EID-CT组26%（246/945），p<0.001。
- 匹配样本中Agatston评分分布相似（p=0.51），狭窄≥50%比例相似（p=0.08）。
- 基线狭窄≥50%者中30%（12/40）在复查时被重新分类为<50%。
诊断标准与关键数值
- 完全诊断图像质量定义为11个近段和中段冠状动脉节段均满足诊断要求。
- 狭窄分级以≥50%为界，基线狭窄≥50%者复查时30%被重新分类为<50%。
临床应用与阅片要点
- 采用PCD-CT优化方案可提高冠状动脉CTA的可判读性，尤其在高钙化积分患者中。
- 报告时注意Agatston评分在PCD-CT与EID-CT间可比，但狭窄分级可能存在差异，随访比较需谨慎。
局限性
- 原文未明确报告局限性。
以上解读依据论文摘要（全文未开放获取或许可不允许翻译转载）。
英文原文（摘要）· 点击展开
OBJECTIVES: The Swedish CArdioPulmonary bioImage Study reexamination (SCAPIS reexamination) is the first population-based study to employ coronary CT angiography (CCTA) using photon-counting detector CT (PCD-CT). It includes 15,000 participants from SCAPIS baseline. This work aims to describe the PCD-CT protocol in SCAPIS reexamination, compare diagnostic image quality with energy-integrating detector CT (EID-CT) at SCAPIS baseline, and assess the comparability of Agatston scores and degree of stenosis between the studies.
METHODS: The PCD-CT protocol in SCAPIS reexamination is provided. CCTA data from 1,147 participants in SCAPIS reexamination (51% women, age 65 [IQR 61-69]) and 29,554 participants in SCAPIS (52% women, age 58 [54-61]) were analyzed. The image quality in eleven proximal and middle coronary segments was compared, stratified by Agatston score. Agatston scores and stenosis degree were compared in age- and sex-matched samples.
RESULTS: Full diagnostic image quality was more frequent in SCAPIS reexamination (1,036/1,147, 90%) compared with SCAPIS baseline (20,468/26,188, 78%), p < 0.001, despite a higher calcium burden (Agatston score 8 [0-106] vs. 0 [0-20]). Of participants with Agatston score > 400, 89/116, 77%, and 246/945, 26%, had full diagnostic image quality, respectively, p < 0.001. Agatston score distributions and stenosis ≥ 50% were similar in matched samples (p = 0.51 and p = 0.08). Of those with ≥ 50% stenosis at SCAPIS baseline, 30% (12/40) were reclassified to < 50% in SCAPIS reexamination.
CONCLUSION: The optimized PCD-CT protocol in SCAPIS reexamination provided high image quality, irrespective of Agatston scores, outperforming the EID-CT protocol used at SCAPIS baseline. Agatston scores were comparable, but potential differences in stenosis grading warrant further investigation.
引用
- Lidén M, Nyberg G, Aurumskjöld ML, et al. Improved coronary CT angiography image quality using photon-counting detector CT in SCAPIS reexamination: scan protocol and comparative analysis. Eur J Radiol. 2026. PMID: 42127646. doi:10.1016/j.ejrad.2026.112920
供执业医师工作参考，不替代临床判断；数值与分级以指南原文为准。