Comparison of Motion-corrected of Phase Sensitive inversion Recovery and Segmented Phase Sensitivity Inversion Recovery in MRI Myocardial Enhancement / 中国循环杂志

ABSTRACT

Objective:To compare the image quality between motion-corrected of phase sensitive inversion recovery SSFP (PSIR SSFP MOCO) sequences and segmented phase sensitivity inversion recovery turbo fast low angel shot PSIR (PSIR segmented turbo Flash) sequences in MRI myocardial enhancement.Methods:A total of 56 patients with PSIR segmented and PSIR SSFP MOCO for myocardial enhancement were retrospectively studied.Subjective quality score (gradel-4),signal to noise ratio (SNR) and relative SNR of normal myocardium,abnormal enhancement of myocardium and left ventricular chamber images were paired and compared between 2 different LGE techniques.Results:Subjective quality scores in PSIR segmented group were as 4 points 28.6％,3 points 41.1％,2 points 28.6％,1 point 1.8％ respectively.In PSIR SSFP MOCO group,4 points was 96.4％ which was higher than PSIR segmented group,P＜0.001,3 points 3.6％,2 points and 1 point were both 0％.The following SNRs were higher in PSIR MOCO SSFP group than PSIR segmented group as in normal myocardium (4.70±3.47) vs (3.64±3.2),P=0.074;in abnormal myocardium (52.58±36.58) vs (27.65±18.47),P＜0.001 and in left ventrieular chamber (40.52±33.97) vs (23.14±11.46),P＜0.001 respectively.The following relative SNRs were higher in PSIR MOCO SSFP group than PSIR segmented group as in normal to abnormal myocardium (47.46±33.97) vs (23.75±16.68),P＜0.001;abnormal myocardium to left ventricular chamber (8.53±17.77) vs (4.54±10.10),P=0.181 and left ventricular chamber to normal myocardium (35.82±25.72) vs (19.49±9.44),P＜0.001 respectively.Conclusion:Compared with PSIR segmented sequence,PSIR SSFP MOCO technique can obtain better quality of delay-enhanced myocardial images.