不同翻转角对女性盆腔磁敏感加权成像图像质量的影响

打开文本图片集

【中图分类号】R445.2 【文献标志码】A

【AbstractlObectiveToinvestigatetheimpactoflipngle（FA）ontheimagequalityofmalepelvicsusceptibiltweighteg ing（SWI）.Methds：Atotalof4patientsundergoingcontrastenhancedpelvicMIwereenoledinthisstudy.Thesigalntensity andstandarddeviationoflsion，uterus，andgluteusmaximus were measuredforeach group，andsignal-to-noiseratio（SNR）and contrast-to-noiseratio（CNR）werecalculated.The4-point methodwasused toperformsubjectiveevaluationofanatomical details， thedegreeofgeometricdformationrifacts，ndteclarityoflsionsinachpartofthpelvicavityeon-parametricFdan test was used forcomparisonof SNR，CNR，and subjective scoresbetweengroups，and the leastsignificantdiference t -test was used forpost-ocomparisonofSR，CR，andsubjectivesoresetweengroups，hileBonferoncectioasperfoedonthesults. Theintraclasscoelationcoeficint（CC）wasusdtoinvestigateteonsisenyinojeciveandsubjectivescoresetwentwooservers.Results：Thereasgodconsistencyinsubjectivescoresthetwoobservers inallgroups（ICC>0.75）exceptforthedegreeof geometricdeformationintheFA=15°andF=2O°groups（ICC=0.75）.The SNRvaluesoflesion，gluteus maximus，nduterus was 132.33 ± 34.15， 61.90±15.41 ，and 103.89±22.48 ，respectively，in the FA=1O° group，with significant differences compared with the （ FA=15∘ and FA=20∘ groups（ P<0.001 .The FA=10∘ group had the highest CNR value of lesion（69.67±29.15），with significant diferences compared with the FA=15∘ and FA=20∘ groups（ P<0.001 ）.Conclusion：Reducing FA can significantlyimprove the contrast of female pelvic images，and the SWIimage qualityoffemale pelvic cavitycan be improved at an FA of1 0∘ ，which can be used as the optimal regimen for setting parameters for female pelvic SWI imaging in clinical practice.

【Keywords】flip angle；susceptibility-weighted imaging；female pelvic cavity;magnetic resonance imaging

根据世界卫生组织的调查显示，中国女性生殖系统疾病的发病率高达 87.8% 。（剩余13170字）