| 卞跃芬,张征宇,滕跃,侯建宇,郭邦俊.ECG-less技术与深度学习图像重建算法用于冠状动脉CT血管成像[J].中国医学影像技术,2025,41(9):1577~1581 |
| ECG-less技术与深度学习图像重建算法用于冠状动脉CT血管成像 |
| ECG-less technology and deep learning image reconstructionalgorithm for coronary CT angiography |
| 投稿时间：2025-04-21 修订日期：2025-09-10 |
| DOI：10.13929/j.issn.1003-3289.2025.09.026 |
| 中文关键词: 冠心病|冠状动脉造影|体层摄影术,X线计算机|心电描记术|深度学习 |
| 英文关键词:coronary disease|coronary angiography|tomography, X-ray computed|electrocardiography|deep learning |
| 基金项目:中国博士后科学基金(2024M762315)。 |
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| 中文摘要: |
| 目的 观察ECG-less技术与深度学习图像重建(DLIR)算法用于冠状动脉CT血管成像(CCTA)的价值。方法 前瞻性随机将71例疑诊冠心病(CAD)患者分为A组(n=35,接受ECG-less CCTA)及B组(n=36,接受物理心电门控CCTA)。对A组分别以滤波反投影(FBP)、自适应统计迭代重建(ASiR-V)(50%权重)及高权重DLIR(DLIR-H)算法重建图像;对B组以常规ASiR-V(50%权重)重建图像。对比2组CCTA辐射剂量和检查时长;比较2组及A组内3种重建算法CCTA图像质量的主、客观评价结果。结果 组间CCTA辐射剂量差异无统计学意义(P＞0.05);A组检查时长较B组缩短29.37%(P＜0.05)。2组ASiR-V重建CCTA图像质量主、客观评价结果差异均无统计学意义(P均＞0.05)。A组中,相比FBP算法,DLIR-H、ASiR-V重建图像主观评分均提升、信噪比(SNR)及对比度噪声比(CNR)均提高、噪声(SD值)均降低(P均＜0.05),而CT值差异均无统计学意义(P均＞0.05)。结论 ECG-less技术能有效缩短CCTA检查时长;DLIR算法可降低CCTA图像噪声、提高图像质量。 |
| 英文摘要: |
| Objective To explore the value of ECG-less technology and deep learning image reconstruction (DLIR) algorithm for coronary CT angiography (CCTA). Methods Seventy-one patients with suspected coronary artery disease (CAD) were prospectively enrolled and randomly divided into group A (n=35, underwent CCTA using ECG-less technology) and B (n=36, underwent CCTA using physical electrocardiographic gating). CCTA images of group A were reconstructed using filtered back projection (FBP), adaptive statistical iterative reconstruction V (ASiR-V) (50% blending) and high-strength DLIR (DLIR-H), respectively, while those of group B were reconstructed using conventional ASiR-V (50% blending). The radiation doses and examination durations of CCTA were compared between groups. Then subjective and objective evaluation of imaging quality were compared between groups and within group A among 3 reconstruction algorithms. Results No significant difference of radiation dose of CCTA was found between groups (P＞0.05). The examination duration in group A was reduced by approximately 29.37% compared to group B (P＜0.05). No significant difference of subjective image quality scores nor objective evaluation of ASiR-V reconstructed CCTA was detected between groups (all P＞0.05). In group A, compared to FBP algorithm, subjective image quality scores of DLIR-H and ASiR-V upgraded, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) increased and standard deviation (SD) values decreased (all P＜0.05), but no significant difference of CT values was found (all P＞0.05). Conclusion ECG-less technology could significantly shorten CCTA examination duration, while DLIR could reduce image noise and improve image quality of CCTA. |
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