低管电位超高分辨率冠状动脉CTA与光子计数检测器CT用于支架评估：一项比较可行性研究。

IF 2.1 4区医学

Japanese Journal of Radiology Pub Date : 2025-08-09 DOI:10.1007/s11604-025-01846-x

Suguru Araki, Satoshi Nakamura, Shiko Okabe, Masafumi Takafuji, Yasutaka Ichikawa, Hajime Sakuma, Kakuya Kitagawa

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引用次数: 0

摘要

目的：本研究旨在评估使用光子计数检测器CT （PCD-CT）的低管电位超高分辨率（UHR）冠状动脉CT血管造影（CCTA）与使用能量积分检测器CT （id -CT）的低管电位CCTA的可行性，并特别关注冠状动脉支架的评估。材料和方法：本回顾性研究纳入54例（88个支架）在低管电位(PCDUHR-low；27例患者[45个支架])或CCTA低管电位下EID-CT (EID-low；27例[43个支架])。通过倾向评分与低pcduhr队列的匹配来选择低eid队列。使用4分Likert量表评估支架内腔的图像质量，4分表示“优秀”。支架的定量评估包括支架诱导的开花、边缘清晰度、支架半最大全宽（FWHM）和ΔHUin-stent，它量化了支架管腔内CT衰减的增加。采用CT剂量指数体积（CTDIvol）和剂量长度积（DLP）评价辐射剂量。结果：PCDUHR-low的图像质量评分高于EID-low(分别为3分和4分，分别为82.2%和53.5%；p = 0.02)。PCDUHR-low显示支架诱导的盛开减少，边缘锐度更高，支架FWHM更小，ΔHUin-stent小于EID-low（所有p UHR-low（9.3±4.4 mGy和107.1±50.4 mGy·cm）与EID-low（10.5±5.9 mGy和118.2±74.9 mGy·cm）相当）。（p = 0.26和0.47）。结论：与低管电位下的EID-CT相比，低管电位下使用UHR模式的CCTA在维持相当辐射剂量的情况下，可获得更好的植入支架可视化图像质量。

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Low-tube-potential ultra-high-resolution coronary CTA with photon-counting detector CT for stent evaluation: a comparative feasibility study.

Objectives: This study aimed to evaluate the feasibility of low-tube-potential ultra-high-resolution (UHR) coronary CT angiography (CCTA) using photon-counting detector CT (PCD-CT) in comparison to low-tube-potential CCTA using energy-integrating detector CT (EID-CT), with a specific focus on the evaluation of coronary stents.

Materials and methods: This retrospective study included 54 patients (88 stents) who underwent CCTA in UHR mode on PCD-CT at low tube potential (PCD_UHR-low; 27 patients [45 stents]) or CCTA with EID-CT at low tube potential (EID-low; 27 patients [43 stents]). The EID-low cohort was selected by propensity score matching to the PCD_UHR-low cohort. Image quality of in-stent lumen was assessed using a 4-point Likert scale, with a score of 4 indicating "excellent." Quantitative assessment of stents included stent-induced blooming, edge sharpness, stent full width at half maximum (FWHM) and ΔHU_in-stent which quantifies the increase in CT attenuation within the stent lumen. Radiation dose was evaluated using CT dose index volume (CTDIvol) and dose-length product (DLP).

Results: PCD_UHR-low had higher image quality scores than EID-low (scores of 3 and 4, 82.2% vs. 53.5%; p = 0.02). PCD_UHR-low showed reduced stent-induced blooming, superior edge sharpness, smaller stent FWHM and smaller ΔHU_in-stent than EID-low (all, p < 0.01). CTDIvol and DLP in PCD_UHR-low (9.3 ± 4.4 mGy and 107.1 ± 50.4 mGy・cm) were comparable to those of EID-low (10.5 ± 5.9 mGy and 118.2 ± 74.9 mGy・cm), respectively. (p = 0.26 and 0.47).

Conclusion: CCTA using UHR mode in PCD-CT at low tube potential achieved superior image quality for implanted stent visualization as compared to EID-CT at low tube potential, while maintaining comparable radiation doses.

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来源期刊

Japanese Journal of Radiology Medicine-Radiology, Nuclear Medicine and Imaging

自引率

4.80%

发文量

133

期刊介绍： Japanese Journal of Radiology is a peer-reviewed journal, officially published by the Japan Radiological Society. The main purpose of the journal is to provide a forum for the publication of papers documenting recent advances and new developments in the field of radiology in medicine and biology. The scope of Japanese Journal of Radiology encompasses but is not restricted to diagnostic radiology, interventional radiology, radiation oncology, nuclear medicine, radiation physics, and radiation biology. Additionally, the journal covers technical and industrial innovations. The journal welcomes original articles, technical notes, review articles, pictorial essays and letters to the editor. The journal also provides announcements from the boards and the committees of the society. Membership in the Japan Radiological Society is not a prerequisite for submission. Contributions are welcomed from all parts of the world.