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《Academic Journal of Second Military Medical University》 2012-12
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Performance of PROPELLER technique in reducing susceptibility artifacts in diffusion-weighted MR images

LIU Xiao-yan1,LIU Ting-ting1,WANG Jun2* 1.Department of Radiology,Affiliated Hospital of Nantong University,Nantong 226001,Jiangsu,China 2.Department of Radiology,Nanjing General Hospital,PLA Nanjing Military Area Command,Nanjing 210002,Jiangsu,China  
Objective To evaluate the performance of PROPELLER diffusion-weighted magnetic resonance image(DWI) in reducing image distortion caused by susceptibility artifacts.Methods Forty volunteers with metal denture were enrolled in the present study;their PROPELLER and echo-planar DWI were taken for the skull base.The quality of each image was evaluated by using a four-point scoring system.Qualitative comparison of image distortion between PROPELLER DWI and echo-planar DWI was performed by ROC analysis.Results The area under the ROC curve was 0.979(P0.01),indicating a significant difference in the image distortion between PROPELLER DWI and echo-planar DWI.PROPELLER technique could greatly reduce the image distortion associated with magnetic susceptibility artifacts.Conclusion PROPELLER technique can greatly reduce metal denture-induced susceptibility-related image distortion,and ROC curve can be used for quantitative analysis of subjective assessment of image quality.
【CateGory Index】: R445.2
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