超高分辨率冠状动脉CT血管造影的可行性和图像表征研究
Feasibility and Image Characterization of Ultra High Resolution Coronary CT Angiography
魏本国 1曹涤非2
作者信息
- 1. 黑龙江省北大荒集团建三江医院影像科(黑龙江佳木斯 156300)
- 2. 黑龙江省科学院高技术研究院(黑龙江哈尔滨 151300)
- 折叠
摘要
目的 评估CT(CT)在高冠状动脉钙负荷患者的超高分辨率冠状动脉计算机断层血管造影(CCTA)的可行性和质量.方法 纳入20例患者接受PCD-CCTA,使用离散视觉量表评估图像噪声和冠状动脉斑块和邻近血管腔,表征图像噪声纹理.结果 CCTA在所有患者中都是可行的.在Bv40核和0.6 mm层厚重建的患者中,虚化伪影最大(55.2％±9.8％),血管锐度最低(477.1±73.6 ΔHU/mm),信噪比最高(27.4±5.6),CNR最高(32.9±6.6),噪声最低(17.1±2.2 HU).考虑到薄片厚度为0.2mm的重建,图像噪声、信噪比、CNR、血管清晰度和虚化伪影在不同核之间存在显著差异(P＜0.001).随着内核清晰度的提高,信噪比和CNR不断降低,图像噪声和血管清晰度增加,其中Bv89内核的清晰度最高(2383.4±787.1 ΔHU/mm).结论 超高分辨率CCTA结合CT是可行的,可以实现钙化冠状动脉的可视化,图像质量好,清晰度高.
Abstract
Objective To evaluate the feasibility and quality of dual photon count detector CT(CT)in ultra-high resolution computed tomography angiography(CCTA)of coronary arteries in patients with high coronary calcium burden.Methods Twenty patients who underwent PCD-CCTA were included,and the discrete vision scale was used to evaluate image noise,coronary artery plaques,and adjacent vascular lumens,characterizing image noise texture.Results CCTA is feasible in all patients.In patients with Bv40 nucleus and 0.6 mm layer thickness reconstruction,the maximum blurring artifacts(55.2％±9.8％)and the lowest vascular sharpness(477.1±73.6％)were observed Δ HU/mm,with the highest signal-to-noise ratio(27.4±5.6),the highest CNR(32.9±6.6),and the lowest noise(17.1±2.2 HU).Considering the reconstruction with a thin slice thickness of 0.2 mm,there are significant differences in image noise,signal-to-noise ratio,CNR,vascular clarity,and blurred artifacts among different nuclei(P＜0.001).With the improvement of kernel clarity,signal-to-noise ratio and CNR continue to decrease,while image noise and vascular clarity increase.Among them,Bv89 kernel has the highest clarity(2383.4±787.1)Δ HU/mm).Conclusion The combination of ultra-high resolution CCTA and CT is feasible,which can achieve visualization of calcified coronary arteries with good image quality and high clarity.
关键词
CT/冠状动脉钙化/超高分辨率冠状动脉计算机断层血管造影Key words
Dual Source Photon Counting Detector CT/Coronary Artery Calcification/Ultra High Resolution Computed Tomography Angiography of Coronary Arteries引用本文复制引用
基金项目
黑龙江省自然科学基金(LH2022H046)
出版年
2024
NETL
NSTL
万方数据