Department of Medical Device Industry, Dongguk University, Seoul, South Korea.
Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea.
J Appl Clin Med Phys. 2021 May;22(5):110-116. doi: 10.1002/acm2.13218. Epub 2021 May 2.
In this study, we assessed how image quality depends on the angle of tilt of a flex tilt coil supporting device during an MRI examination. All measurements were performed with an American College of Radiology (ACR) MRI phantom using a flex tilt coil supporting device. All images were analyzed using an automatic assessment method following the ACR MRI accreditation guidance. Image quality was compared between acquisitions grouped according to the angle of tilt of the coil supporting device: group A (Flat mode), group B (10˚), and group C (18˚). All measured image qualities were within the ACR recommended criteria, regardless of the angle of tilt of the flex tilt coil supporting device. However, statistically significant differences between the three groups were found for slice thickness, position accuracy, image intensity uniformity, and SNR (P < 0.05, ANOVA). The flex tilt coil supporting device can provide sufficient image quality, passing the criteria of the ACR MRI guideline, despite differences in slice thickness, slice position accuracy, image intensity uniformity, and SNR according to the angle of tilt.
在这项研究中，我们评估了在 MRI 检查期间，柔性倾斜线圈支撑装置的倾斜角度如何影响图像质量。所有测量均使用美国放射学院 (ACR) MRI 体模和柔性倾斜线圈支撑装置进行。所有图像均使用符合 ACR MRI 认证指南的自动评估方法进行分析。根据线圈支撑装置的倾斜角度将采集到的图像进行分组：A 组（平模式）、B 组（10˚）和 C 组（18˚），然后对图像质量进行比较。无论柔性倾斜线圈支撑装置的倾斜角度如何，所有测量的图像质量均在 ACR 推荐标准范围内。然而，三组之间在层厚、位置准确性、图像强度均匀性和 SNR 方面存在统计学差异（P < 0.05，方差分析）。尽管根据倾斜角度，在层厚、层位置准确性、图像强度均匀性和 SNR 方面存在差异，但柔性倾斜线圈支撑装置仍能提供足够的图像质量，符合 ACR MRI 指南的标准。
