干旱区生态环境知识资源中心(Arid): A comparative study of RF heating of deep brain stimulation devices in vertical vs. horizontal MRI systems

Arid

DOI	10.1371/journal.pone.0278187
	A comparative study of RF heating of deep brain stimulation devices in vertical vs. horizontal MRI systems
	Vu, Jasmine; Bhusal, Bhumi; Nguyen, Bach T.; Sanpitak, Pia; Nowac, Elizabeth; Pilitsis, Julie; Rosenow, Joshua; Golestanirad, Laleh
通讯作者	Golestanirad, L
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2022
卷号	17 期号:12
英文摘要	The majority of studies that assess magnetic resonance imaging (MRI) induced radiofrequency (RF) heating of the tissue when active electronic implants are present have been performed in horizontal, closed-bore MRI systems. Vertical, open-bore MRI systems have a 90 degrees rotated magnet and a fundamentally different RF coil geometry, thus generating a substantially different RF field distribution inside the body. Little is known about the RF heating of elongated implants such as deep brain stimulation (DBS) devices in this class of scanners. Here, we conducted the first large-scale experimental study investigating whether RF heating was significantly different in a 1.2 T vertical field MRI scanner (Oasis, Fujifilm Healthcare) compared to a 1.5 T horizontal field MRI scanner (Aera, Siemens Healthineers). A commercial DBS device mimicking 30 realistic patient-derived lead trajectories extracted from postoperative computed tomography images of patients who underwent DBS surgery at our institution was implanted in a multi-material, anthropomorphic phantom. RF heating around the DBS lead was measured during four minutes of high-SAR RF exposure. Additionally, we performed electromagnetic simulations with leads of various internal structures to examine this effect on RF heating. When controlling for RMS B-1(+), the temperature increase around the DBS lead-tip was significantly lower in the vertical scanner compared to the horizontal scanner (0.33 +/- 0.24 degrees C vs. 4.19 +/- 2.29 degrees C). Electromagnetic simulations demonstrated up to a 17-fold reduction in the maximum of 0.1g-averaged SAR in the tissue surrounding the lead-tip in the vertical scanner compared to the horizontal scanner. Results were consistent across leads with straight and helical internal wires. Radiofrequency heating and power deposition around the DBS lead-tip were substantially lower in the 1.2 T vertical scanner compared to the 1.5 T horizontal scanner. Simulations with different lead structures suggest that the results may extend to leads from other manufacturers.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000925765200019
WOS关键词	SIMULATION ; SAFETY ; IMPLANTS ; WIRES ; SAR
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394048
推荐引用方式 GB/T 7714	Vu, Jasmine,Bhusal, Bhumi,Nguyen, Bach T.,et al. A comparative study of RF heating of deep brain stimulation devices in vertical vs. horizontal MRI systems[J],2022,17(12).
APA	Vu, Jasmine.,Bhusal, Bhumi.,Nguyen, Bach T..,Sanpitak, Pia.,Nowac, Elizabeth.,...&Golestanirad, Laleh.(2022).A comparative study of RF heating of deep brain stimulation devices in vertical vs. horizontal MRI systems.PLOS ONE,17(12).
MLA	Vu, Jasmine,et al."A comparative study of RF heating of deep brain stimulation devices in vertical vs. horizontal MRI systems".PLOS ONE 17.12(2022).