Orii Makoto, Sugawara Momoko, Sugawara Tsuyoshi, Yoshioka Kunihiro
Department of Radiology, Iwate Medical University, Yahaba, Japan.
Department of Radiology, Iwate Medical University, Yahaba, Japan.
Magn Reson Imaging. 2025 Apr;117:110313. doi: 10.1016/j.mri.2024.110313. Epub 2024 Dec 19.
The total examination time can be reduced if high-quality two-dimensional (2D) cine images can be collected post-contrast to minimize non-scanning time prior to late gadolinium-enhanced imaging. This study aimed to assess the equivalency of the pre-and post-contrast performance of 2D deep learning-based highly accelerated cardiac cine (DL cine) imaging by evaluating the image quality and the quantification of biventricular volumes and function in the clinical setting.
Thirty patients (20 men, mean age 53.7 ± 17.8 years) underwent cardiac magnetic resonance on a 1.5 T scanner for clinical indications, and pre- and post-contrast DL cine images were acquired with a short-axis view. Image-quality was scored according to three main criteria: the blood-to-myocardial contrast, endocardial edge delineation, and presence of motion artifacts throughout the cardiac cycle. Biventricular end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), ejection fraction (EF), and left ventricular mass (LVM) were analyzed and compared between the pre- and post-contrast DL cine images.
The actual median time of 2D DL cine acquisition was 38.4 ± 9.1 s. There were no significant differences in the image quality scores between pre- and post-contrast DL cine images (p > 0.05). In the volume and functional analysis, there was no significant difference in terms of biventricular EDV, ESV, SV, EF, and LVM (p > 0.05).
The performance of 2D DL cine is equivalent before and after contrast injection for the assessment of image quality and ventricular function in the clinical setting.
如果能够在注射造影剂后采集高质量的二维（2D）电影图像，以尽量减少延迟钆增强成像前的非扫描时间，那么总检查时间可以缩短。本研究旨在通过在临床环境中评估图像质量以及双心室容积和功能的量化，来评估基于二维深度学习的高度加速心脏电影（DL电影）成像在注射造影剂前后的性能等效性。
30例患者（20名男性，平均年龄53.7±17.8岁）因临床指征在1.5T扫描仪上接受心脏磁共振检查，并采用短轴视图采集注射造影剂前后的DL电影图像。根据三个主要标准对图像质量进行评分：血液与心肌的对比度、心内膜边缘描绘以及整个心动周期中运动伪影的存在情况。分析并比较注射造影剂前后DL电影图像的双心室舒张末期容积（EDV）、收缩末期容积（ESV）、每搏输出量（SV）、射血分数（EF）和左心室质量（LVM）。
二维DL电影采集的实际中位时间为38.4±9.1秒。注射造影剂前后DL电影图像的质量评分无显著差异（p>0.05）。在容积和功能分析中，双心室EDV、ESV、SV、EF和LVM方面无显著差异（p>0.05）。
在临床环境中，二维DL电影成像在注射造影剂前后对于图像质量和心室功能评估的性能是等效的。
