Performance Comparison of Different MRI Radio-Frequency Coils Based on ACR Phantom
YUAN Zi-long1, ZHANG Zhao-xi1, QIU Jian-feng2, CHEN Tiao1, LIU Tao1, LIU Yu-lin1
1.Department of Radiology, Hubei Cancer Hospital, Wuhan Hubei 430079, China; 2.College of Radiology, Taishan Medical University, Tai’an Shandong 271016, China
Abstract：Objective To explore the performance characteristics of different radio-frequency coils including 12-units head matrix coil, 12-units abdominal coil and the general body coil in MRI. Methods According to the detection standard recommended by American college of radiology (ACR), to measure and compare signal to noise ratio (SNR), percent integral uniformity (PIU) and percent signal ghosting (PSG) of MRI images obtained through the three radio-frequency coils based on ACR phantom. Results When the scanning sequence is SE-T1WI, SNR of MRI images obtained through 12-units head matrix coil, 12-units abdominal coil is 16.41 times and 14.1 times as high as that of the general body coil. When the scanning sequence is double SE - T2WI, SNR of MRI images obtained through 12-units head matrix coil, 12-units abdominal coil is 6.31 times and 5.35 times as high as that of the general body coil. PIU of the general body coil is better than that of 12-units head matrix coil and 12-units abdominal coil, while PIU of 12-units head matrix coil can’t meet the standard requirements. PSG of 12-units head matrix coil is lower than that of 12-units abdominal coil and the general body coil, while PSG of all coils can meet the standard requirements of head coils. Conclusion Each radio-frequency coil owns characteristic advantages, which indicates that they should be applied in MRI according to different clinical requirements.
袁子龙，张照喜，邱建峰，陈迢，刘涛，刘玉林. 基于ACR体模的磁共振射频线圈性能的对比[J]. 中国医疗设备, 2015, 30(1): 100-103.
YUAN Zi-long, ZHANG Zhao-xi, QIU Jian-feng, CHEN Tiao, LIU Tao, LIU Yu-lin. Performance Comparison of Different MRI Radio-Frequency Coils Based on ACR Phantom. China Medical Devices, 2015, 30(1): 100-103.
AAPM Report No.28.Quality Assurance Methods and Phantoms for Magnetic Resonance Imaging[A].Report of Task Group No.1,Nuclear Magnetic Resonance Committee[C].AAPM,1990-1995.
Qiu JF,Wang GZ,Min J,et a1.Testing the quality of images for permanent magnetdesktop MRI systems using specially designedphantoms[J].Phys Med,2013,58(24):8677-8687.
[8]
American College of Radiology,MRI Quality Control Manual[S].2004.
[11]
Mc Robbie DM,Moore EA,Graves MJ,et a1.MRI From picture to proton[M].Oxford:Cambridge University Press,2003.
[14]
赵喜平.磁共振成像系统的原理及其应用[M].北京:科学出版社,2000.
[7]
J.Rock Hadley.Design of optimal radio frequency coils for improved signal-to-noise ratio in magnetic resonance angiography[D]. America:The University of Utah,2006.
[3]
任国权,刘晓军.磁共振成像设备应用质量检测技术与评审[M].北京:人民军医出版社,2005.
[13]
Olaf Dietrich,Jose G. Raya,Scott B. Reeder,et al.Measurement of signal-to-noise ratios in mr images: influence of multichannel coils,parallel imaging and reconstruction flters[J].J Magn Reson Imaging,2007,26(2):375-385.
[9]
American College of Radiology.Phantom Test Guidance for the ACR MRI Accreditation Program[S].1998.
[10]
American College of Radiology.Site Scanning Instructions for Use of the MR Phantom for the ACR MRI Accreditation Program[S].1998.
AAPM Report No.34.Acceptance testing of magnetic resonance imaging systems[A].Report of AAPM Nuclear Magnetic Resonance Task Group No.6,Nuclear Magnetic Resonance Committee[C].AAPM,1992-1993.
