Osawa Mitsuharu, Fujita Naotoshi, Koyama Shuji, Kaneda Naoki, Miyachi Shigeru
Central Radiology Department, Aichi Medical University Hospital, Nagakute, Aichi, Japan.
Department of Radiology, Division of Medical Technology, Nagoya University Hospital, Nagoya, Aichi, Japan.
J Neuroendovasc Ther. 2024;18(8):213-218. doi: 10.5797/jnet.oa.2023-0095. Epub 2024 Jun 13.
The angiography systems A (A) and B (B), both incorporated at our hospital, are equipped with metal artifact reduction (MAR) applications. In clinical practice, it is crucial to understand the characteristics of MAR in both systems given that endovascular treatments are occasionally administered with both. In this study, we compared the artifact reduction effects of MAR on equipment A and B and clarified the differences between the two systems.
An artifact evaluation phantom was created using a cylindrical water phantom and an iodine contrast medium. The phantom was imaged, MAR processing was performed on the obtained images, and an isotropic quantitative evaluation of artifacts was performed by extreme value statistical analysis using the Gumbel distribution.
The MAR reduction effects were approximately 45% and 40% for equipment A and B at concentrations of 8300 and 6000, respectively. The MAR reduction effect in both devices exhibited different trends depending on the concentration.
In clinical procedures that make use of absorbents in medium concentrations of approximately 3000-5000, such as n-butyl-2-cyanoacrylate and Onyx, it is necessary to understand the MAR characteristics of both devices and consider the use of alternative devices as an option.
我院配备的血管造影系统A（A）和系统B（B）均装有金属伪影减少（MAR）应用程序。在临床实践中，鉴于有时会同时使用这两种系统进行血管内治疗，了解两种系统中MAR的特性至关重要。在本研究中，我们比较了MAR对设备A和设备B的伪影减少效果，并阐明了两种系统之间的差异。
使用圆柱形水体模和碘造影剂制作伪影评估体模。对该体模进行成像，对获得的图像进行MAR处理，并使用耿贝尔分布通过极值统计分析对伪影进行各向同性定量评估。
在浓度为8300和6000时，设备A和设备B的MAR减少效果分别约为45%和40%。两种设备的MAR减少效果随浓度呈现不同趋势。
在使用中等浓度（约3000 - 5000）吸收剂（如正丁基-2-氰基丙烯酸酯和Onyx）的临床操作中，有必要了解两种设备各自的MAR特性，并考虑选择使用其他设备。
