Head and Neck Imaging
Influence of Change of Scanning Parameters on Metal Artifacts in FLAIR Sequence*
Author：LI Hui, CHEN Yi, WANG Ya-jing, et al.
affiliation：Department of Radiology, North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei Province, China
PDFAbstract
Objective To discuss the influence of different scanning parameters on the metal artifacts in FLAIR sequence, in order to reduce the artifacts by adjusting the scanning parameters. Methods Ni-Cr alloy were molded into standard post-core-crown posterior tooth model. The model were scanned by 1.5T MR scanner. Axial FLAIR sequence was scanned. The scan parameters was the recommended values for the SIEMENS 1.5T MR scanner. Changing the following parameters: TR, TE, FOV, Matrix, BW, NEX, ETL, Thk, FA one by one without affecting the image quality. To determine the section of the largest artifacts and measure the area. Statistical testing was performed. Results There was statistically significant differences of metal artifacts in different FOV values (F=67.04, P<0.001). There was statistically significant differences of metal artifacts in different Matrix values (F=48.75, P<0.001). There was statistically significant differences of metal artifacts in different FA values (F=5.61, P=0.04). Conclusion In FLAIR sequence, decreasing the FOV, increasing Matrix and FA can decrease the artifacts.
【Keyword】Ni-Cr Alloy; Artifacts; Magnetic Resonance Imaging(MRI); Fluid Attenuated Inversion Recovery(FLAIR)
【Chart number】R445.2
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672- 5131.2018.03.043
Chinese journal of CT and MRI
th16Volume， th 3 Issue
2018Year03Month
Related articles
Editor email：（1）中国CT和MRI杂志：ctmri@vip.163.com；（2）罕少疾病杂志：hs1999@vip.163.com
Contact number：0755-83695203
Our address：
English
简体中文
logged in
Wechat
TouTiao