Department of Radiology, Gunma University Hospital, Maebashi, Japan.
Department of Radiological Technology, Graduate School of Radiological Technology, Gunma Prefectural College of Health Sciences, Maebashi, Japan.
Phys Eng Sci Med. 2023 Jun;46(2):915-924. doi: 10.1007/s13246-023-01267-y. Epub 2023 May 8.
This study aimed to clarify the magnetic resonance imaging (MRI) compatibility of leave-on powdered hair thickeners by evaluating the displacement force and image artifacts of commercially available leave-on powdered hair thickeners on MRI devices and their response to metal and ferromagnetic detectors. Thirteen types of leave-on powdered hair thickeners were studied: nine hair thickener and four foundation types. MRI systems of 1.5 T and 3.0 T were used. Deflection angles and MR image artifacts according to ASTM F2052 and F2119 were evaluated. Handheld metal and ferromagnetic detectors were used to investigate whether hair thickeners could be detected in screening before MRI examinations. The hair thickener type had a deflection angle of 0°, whereas the foundation type had a deflection angle of 90°, indicating a strong physical effect. Significant image artifacts appeared only on the foundation type. The foundation type reacted at distances of less than 10 cm only with a ferromagnetic detector. Foundation-type leave-on powdered hair thickeners containing magnetic substances exhibited strong physical effects and produced significant image artifacts, and those can only be detected by screening with a ferromagnetic detector.
本研究旨在通过评估市售留用型粉末发用增稠剂在 MRI 设备上的移位力和图像伪影及其对金属和铁磁探测器的反应，阐明留用型粉末发用增稠剂的 MRI 兼容性。研究了 13 种留用型粉末发用增稠剂：9 种发用增稠剂和 4 种粉底型。使用了 1.5T 和 3.0T 的 MRI 系统。根据 ASTM F2052 和 F2119 评估了偏转角和 MR 图像伪影。使用手持式金属和铁磁探测器来研究在 MRI 检查前的筛查中是否可以检测到发用增稠剂。发用增稠剂类型的偏转角为 0°，而粉底类型的偏转角为 90°，表明具有强烈的物理效应。仅在粉底类型上出现明显的图像伪影。粉底型仅在距离小于 10cm 时才与铁磁探测器发生反应。含有磁性物质的粉底型留用型粉末发用增稠剂表现出强烈的物理效应，并产生明显的图像伪影，只能通过铁磁探测器的筛查来检测。
