Cardiac functional assessment using prospectively electrocardiography-triggered computed tomography in children with congenital heart disease: Comparison of radiation dose and image quality between heart rate-dependent single-extended and heart rate-independent dual-focused scans

IF 3.2 3区医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

European Journal of Radiology Pub Date : 2024-11-19 DOI:10.1016/j.ejrad.2024.111838

Hyun Woo Goo , Seon Young Goo

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引用次数: 0

Abstract

Purpose

To evaluate radiation dose (RD) reduction potential of heart rate-independent dual-focused scan of prospectively electrocardiography (ECG)-triggered computed tomography (CT) for cardiac functional assessment in children with congenital heart disease (CHD), RD and image quality of the scan mode were compared to those of heart rate-dependent single-extended scan.

Methods

This study encompassed 1,252 prospectively ECG-triggered pediatric cardiothoracic CT examinations, including single-focused (a reference in matched comparisons), single-extended (younger patients), and dual-focused (older patients) scans. Propensity score matching was used to reduce the confounding effect of age and sex in two matched groups (MPs) (younger MP: single-focused vs. single-extended; older MP: single-focused vs. dual-focused). CT RD, image noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) of the MPs were compared.

Results

The effective dose of single-extended (1.4 ± 0.5 mSv) and dual-focused (1.1 ± 0.4 mSv) scans were approximately 2.0–3.2 times higher than (depending on heart rate) and approximately 1.8 times (irrespective of heart rate) that of the age- and sex-matched single-focused scans (0.6 ± 0.2 mSv), respectively. Image noise and SNR of single-extended and dual-focused scans were similar to those of the age- and sex-matched single-focused scans (p values > 0.05). The CNR was also comparable between single-focused and single-extended scans (younger MP) (p > 0.05), but a slightly lower CNR of the dual-focused scans compared to single-focused scans was observed in the older MP (p < 0.02).

Conclusion

For cardiac functional assessment in children with CHD, heart rate-independent dual-focused prospectively ECG-triggered scan can reduce CT RD, especially at lower heart rates, with comparable image quality, compared to heart rate-dependent single-extended scan.

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使用前瞻性心电图触发计算机断层扫描对先天性心脏病患儿进行心脏功能评估：依赖心率的单扩展扫描与不依赖心率的双聚焦扫描的辐射剂量和图像质量比较。

目的：为了评估前瞻性心电图（ECG）触发计算机断层扫描（CT）用于先天性心脏病（CHD）患儿心脏功能评估时与心率无关的双聚焦扫描减少辐射剂量（RD）的潜力，将该扫描模式的RD和图像质量与与心率有关的单延伸扫描的RD和图像质量进行了比较：这项研究涵盖了 1252 例前瞻性心电图触发的小儿心胸 CT 检查，包括单聚焦（匹配比较中的参考）、单延伸（年轻患者）和双聚焦（年长患者）扫描。在两个配对组（MPs）（年轻的 MPs：单聚焦 vs. 单延伸；年长的 MPs：单聚焦 vs. 双聚焦）中使用倾向得分匹配来减少年龄和性别的混杂影响。比较了两组 MP 的 CT RD、图像噪声、信噪比（SNR）和对比度-噪声比（CNR）：结果：单扩展（1.4 ± 0.5 mSv）和双聚焦（1.1 ± 0.4 mSv）扫描的有效剂量分别是年龄和性别匹配的单聚焦扫描（0.6 ± 0.2 mSv）的约 2.0-3.2 倍（取决于心率）和约 1.8 倍（与心率无关）。单焦距和双焦距扫描的图像噪声和信噪比与年龄和性别匹配的单焦距扫描相似（p 值 > 0.05）。单聚焦扫描和单延伸扫描的 CNR 值也相当（年龄较小的 MP）（p > 0.05），但在年龄较大的 MP 中观察到双聚焦扫描的 CNR 值略低于单聚焦扫描（p 结论：单延伸扫描和双聚焦扫描的 CNR 值与年龄和性别匹配的单聚焦扫描相似（p > 0.05）：对于患有先天性心脏病的儿童的心脏功能评估，与依赖心率的单延伸扫描相比，不依赖心率的双聚焦前瞻性心电图触发扫描可减少 CT RD，尤其是在心率较低时，且图像质量相当。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Radiology 医学-核医学

CiteScore

6.70

自引率

3.00%

发文量

398

审稿时长

42 days

期刊介绍： European Journal of Radiology is an international journal which aims to communicate to its readers, state-of-the-art information on imaging developments in the form of high quality original research articles and timely reviews on current developments in the field. Its audience includes clinicians at all levels of training including radiology trainees, newly qualified imaging specialists and the experienced radiologist. Its aim is to inform efficient, appropriate and evidence-based imaging practice to the benefit of patients worldwide.