目的以关节镜检查结果为对照,比较三维稳态采集快速成像序列(3D FIESTA)和常规序列在诊断前交叉韧带(ACL)损伤中的准确性。资料与方法对50例患者的55个外伤膝关节行常规MRI(SET1WI,FSEPD/T2WI)和3D FIESTA序列扫描。依据MRI图像表现将AC...目的以关节镜检查结果为对照,比较三维稳态采集快速成像序列(3D FIESTA)和常规序列在诊断前交叉韧带(ACL)损伤中的准确性。资料与方法对50例患者的55个外伤膝关节行常规MRI(SET1WI,FSEPD/T2WI)和3D FIESTA序列扫描。依据MRI图像表现将ACL损伤分级,分析比较上述序列对ACL损伤诊断的敏感性、特异性、准确性和Kappa值。结果 3D FIESTA诊断ACL损伤的敏感性、特异性、准确性和Kappa值均较常规序列高,分别为94.6%、77.8%、89.1%、0.745。结论 3D FIESTA序列图像采集时间短,显示ACL损伤的准确率高,是常规膝关节序列检查的补充。展开更多
Background There is a strong need for quick noninvasive diagnostic technique that can give a valid estimate of the status of the cartilage reliably, discriminating intact cartilage from various grades of impaired cart...Background There is a strong need for quick noninvasive diagnostic technique that can give a valid estimate of the status of the cartilage reliably, discriminating intact cartilage from various grades of impaired cartilage. The goal of this study was to assess the incidence of knee cartilage injuries and compare the accuracy of two-dimension spin echo （2D SE） and fast spin echo （FSE） （conventional MRI）, three-dimensional spoiled gradient echo （3D SPGR）, three-dimensional fast imaging employing steady state acquisition （3D FIESTA） MR imaging sequences with surgical examination of the articular cartilage. Methods One hundred and thirty-eight knees with history of knee trauma received conventional MRI, 3D SPGR and 3D FIESTA MRI examination before surgery, and surgical examination of articular cartilage was used as reference standard. A modified version of the Noyes classification system was applied for the evaluation of the lateral femoral condyle （LFC）, medial femoral condyle （MFC）, lateral tibial plateau （LTP）, medial tibial plateau （MTP）, trochlea and patella. The incidence and distributions of different injured grades at different articular surfaces of knee were assessed. A series of assessment indeces of 3D SPGR, 3D FIESTA, and the combination of the conventional MRI and 3D SPGR imaging were calculated. Results The incidence of cartilage defects （grade 2 to 4） was 22% （183/828）, according to surgical examination. Grade 3 and 4 lesions were absent at the medial tibial plateau. The rates of exact match between the grading results of different MRI procedures and surgical examination were 49% of 3D SPGR, 61% of 3D FIESTA, and 82% of the combination of 3D SPGR and conventional MRI. Also, the combination of 3D SPGR and conventional MR imaging provided the highest sensitivity, specificity, accuracy, positive and negative predictive values, at 71%, 97%, 90%, 90% and 90%, respectively. Conclusions For all the articular surfaces of the traumatic knees, about one fifth （22%）展开更多
目的探讨3.0 T MRI 3D-TOF序列联合3D-FIESTA序列结合多平面重建在三叉神经微血管减压术术前评估中的应用价值。材料与方法回顾性分析187例湘雅医院原发性三叉神经痛行三叉神经微血管减压术(MVD)的病例资料,将术前3D-TOF序列联合3D-FIE...目的探讨3.0 T MRI 3D-TOF序列联合3D-FIESTA序列结合多平面重建在三叉神经微血管减压术术前评估中的应用价值。材料与方法回顾性分析187例湘雅医院原发性三叉神经痛行三叉神经微血管减压术(MVD)的病例资料,将术前3D-TOF序列联合3D-FIESTA序列检查情况与术中探查结果进行对比研究。结果 187例患者术前3D-TOF序列联合3D-FIESTA序列显示:症状侧三叉神经血管压迫(neurovascular compression,NVC)阳性173例,阳性率达92.3%,MVD术发现血管神经压迫179例,阳性率达95.6%。其中小脑上动脉73例(40.8%)、小脑前下动脉28例(15.4%)、基底动脉17例(9.8%)、小脑后下动脉5例(3.2%)、复合压迫35例(20.2%)、静脉11例(6.2%)。3D-TOF序列联合3D-FIESTA序列显示无血管压迫14例,阴性率7.7%,而术中发现无责任血管10例,阴性符合率58.8%。症状对侧血管压迫阳性20例,假阳性率10.7%,两侧阳性率差异有统计学意义(P<0.05)。结论 3D-TOF序列联合3D-FIESTA序列,结合3D后处理重建能相对清晰显示三叉神经与周围血管的空间关系,是三叉神经微血管减压术术前评估的有效方法之一。展开更多
文摘目的以关节镜检查结果为对照,比较三维稳态采集快速成像序列(3D FIESTA)和常规序列在诊断前交叉韧带(ACL)损伤中的准确性。资料与方法对50例患者的55个外伤膝关节行常规MRI(SET1WI,FSEPD/T2WI)和3D FIESTA序列扫描。依据MRI图像表现将ACL损伤分级,分析比较上述序列对ACL损伤诊断的敏感性、特异性、准确性和Kappa值。结果 3D FIESTA诊断ACL损伤的敏感性、特异性、准确性和Kappa值均较常规序列高,分别为94.6%、77.8%、89.1%、0.745。结论 3D FIESTA序列图像采集时间短,显示ACL损伤的准确率高,是常规膝关节序列检查的补充。
基金This research was supported by the National Natural Science Foundation of China （No. 30670605 and No. 30870701）.
文摘Background There is a strong need for quick noninvasive diagnostic technique that can give a valid estimate of the status of the cartilage reliably, discriminating intact cartilage from various grades of impaired cartilage. The goal of this study was to assess the incidence of knee cartilage injuries and compare the accuracy of two-dimension spin echo （2D SE） and fast spin echo （FSE） （conventional MRI）, three-dimensional spoiled gradient echo （3D SPGR）, three-dimensional fast imaging employing steady state acquisition （3D FIESTA） MR imaging sequences with surgical examination of the articular cartilage. Methods One hundred and thirty-eight knees with history of knee trauma received conventional MRI, 3D SPGR and 3D FIESTA MRI examination before surgery, and surgical examination of articular cartilage was used as reference standard. A modified version of the Noyes classification system was applied for the evaluation of the lateral femoral condyle （LFC）, medial femoral condyle （MFC）, lateral tibial plateau （LTP）, medial tibial plateau （MTP）, trochlea and patella. The incidence and distributions of different injured grades at different articular surfaces of knee were assessed. A series of assessment indeces of 3D SPGR, 3D FIESTA, and the combination of the conventional MRI and 3D SPGR imaging were calculated. Results The incidence of cartilage defects （grade 2 to 4） was 22% （183/828）, according to surgical examination. Grade 3 and 4 lesions were absent at the medial tibial plateau. The rates of exact match between the grading results of different MRI procedures and surgical examination were 49% of 3D SPGR, 61% of 3D FIESTA, and 82% of the combination of 3D SPGR and conventional MRI. Also, the combination of 3D SPGR and conventional MR imaging provided the highest sensitivity, specificity, accuracy, positive and negative predictive values, at 71%, 97%, 90%, 90% and 90%, respectively. Conclusions For all the articular surfaces of the traumatic knees, about one fifth （22%）
