Research on the causes and processing methods of artifacts generated by parallel acquisition technology in cranial magnetic resonance imaging
Objective To explore the causes of artifacts generated by parallel acquisition technology in cranial magnetic resonance imaging and analyze reasonable processing methods.Methods 60 patients who underwent cranial magnetic resonance imaging were selected as the study subjects and divided into group A,group B,and group C according to random numerical table,with 20 patients in each group.Group A was conducted cranial magnetic resonance imaging with conventional parameters.Group B scanned with the number of excitations reduced to 1.5,while other parameters remain unchanged.Group C scanned with the number of excitations reduced to 1 and removed the parallel acquisition option.The image quality and artifact occurrence of cranial magnetic resonance scanning of the three groups were compared.Results Comparison of the subjective assessment results of image quality in the three groups,the difference was statistically significant(P＜0.05).Comparison of the results of objective assessment of image quality in the three groups showed no statistically significant difference(P＞0.05).In group A,4 cases(20.00% )with artifacts and 16 cases(80.00% )without artifacts.In group B,2 cases(10.00% )with artifacts and 18 cases(90.00% )without artifacts.In group C,0 cases with artifacts and 20 cases(100.00% )without artifacts.There was statistical significance in the incidence of artifacts among the three groups(P＜0.05).Conclusion The artifacts characterized by high signal arc in cranial magnetic resonance imaging are caused by parallel acquisition technology.Reducing the number of excitations,or deleting parallel acquisition technology during parameter setting can reduce the occurrence of artifacts.
Magnetic resonance imagingHeadArtifactsParallel acquisition technology
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