MRI对膝关节半月板桶柄样撕裂的诊断价值

目的　评价MRI诊断膝关节半月板桶柄样撕裂的应用价值。方法　经关节镜证实的 2 1例的桶柄样撕裂患者及 11例非桶柄样撕裂患者。采用百胜公司的关节专用磁共振成像系统进行扫描。观察以下 4种MRI征象 ,双前角征 ,双后交叉韧带征 ,髁间碎片征及领结消失征。结果　 3 2例患者中 ,出现双前角征的有 10例 ,双后交叉韧带征 5例 ,髁间碎片征 2 0例 ,领结消失征 2 5例。结论　MRI是诊断半月板桶柄样撕裂的有效手段 ,内侧半月板桶柄样撕裂的敏感性及特异性较外侧高 ,髁间碎片征是诊断内侧半月板桶柄样撕裂最有价值的征象     

MRI检查膝关节半月板桶柄样撕裂的临床价值分析

目的探讨MRI在膝关节半月板桶柄样撕裂诊断中的临床应用价值。方法对我院经关节镜证实为膝关节半月板损伤患者62例进行MRI检查。结果双前角征、髁间碎片征、双后交叉韧带征、领结消失征等四个征象对内侧半月板桶柄样撕裂的诊断敏感性分别为61.54%、92.31%、38.46%、76.92%,特异性均为100.00%。双前角征、髁间碎片征、双后交叉韧带征、领结消失征等四个征象对外侧半月板桶柄样撕裂的诊断敏感性分别为23.53%、47.06%、0.00%、70.59%。在28例膝关节半月板桶柄样撕裂中,有22例在MRI上出现了两种以上的征象,总体诊断敏感性为78.57%。对比分析发现内侧半月板桶柄样撕裂在双前角征、髁间碎片征、双后交叉韧带征等征象下诊断敏感性明显高于外侧半月板,且差异具有统计学意义。髁间碎片征是诊断内侧半月板桶柄样撕裂敏感性最高的征象(92.31%),特异性达100.00%。结论 MRI是诊断膝关节半月板桶柄样撕裂的有效方法,其对内侧半月板桶柄样撕裂的敏感性及特异性较外侧高,髁间碎片征对诊断内侧半月板桶柄样撕裂的来说最具价值,而外侧半月板桶柄样撕裂则很难利用该征象进行确诊。双前角征在诊断外侧半月板桶柄样撕裂时敏感性低,特异性高,而领结消失征则是敏感性高,特异性低,仅能作为诊断参考。     

膝关节半月板桶柄样撕裂的MRI表现

目的 探讨膝关节半月板桶柄样撕裂的MRI特征.方法 搜集经手术或关节镜证实的膝关节半月板桶柄样撕裂56例,回顾性分析其MRI表现,总结MRI特征.结果 56例半月板桶柄样撕裂中,内侧半月板34例,外侧半月板22例,半月板碎块移位征42例,阳性率75%(42/56);双前(后)交叉韧带征36例,阳性率64.3%(36/56);半月板翻转征30例,阳性率53.6%(30/56);半月板双前角征24例,阳性率42.9%(24/56);领结缺如征39例,阳性率69.6%(39/56);外周残半月板征41例,阳性率73.2%(41/56).结论 膝关节半月板桶柄样撕裂具有典型的MRI特征,MRI对其诊断具有重要价值.     

外侧半月板桶柄状撕裂低场MRI特殊征象分析

目的分析膝关节外侧半月板桶柄状撕裂(bucket-handletears,BHT)的低场MRI特殊征象。资料与方法回顾性分析12例经关节镜证实为膝关节外侧半月板BHT患者的低场强MRI图像,总结MRI征象,除碎块内移征、外周残半月板征、半月板翻转征、空领结征外,着重分析双前交叉韧带征、厚饼征、三韧带征。结果 12例外侧半月板BHT中,碎块内移征10例、外周残半月板征9例、半月板翻转征6例、空领结征12例、双前交叉韧带征3例、厚饼征4例、三韧带征3例。结论碎块内移征、外周残半月板征、半月板翻转征、空领结征见于内侧半月板BHT,同样见于外侧半月板BHT,前交叉韧带征、厚饼征和三韧带征为外侧半月板BHT特殊征象。     

MRI诊断膝关节半月板桶柄状撕裂

目的:总结分析半月板桶柄状撕裂的MRI征象和诊断价值.方法:回顾性分析146个经关节镜证实的膝关节MR图像,其中28个膝关节存在半月板桶柄状撕裂,记录如下5种MRI征象:碎块内移征、外周残半月板征、双PCL征、空领结征及双前角征,并分别计算每种征象诊断半月板桶柄状撕裂的敏感度、特异度、准确度、阳性预测值和阴性预测值.结...     

MRI检查对半月板桶柄状撕裂的诊断价值研究

目的:探讨MR影像在膝关节半月板桶柄状撕裂(Bucket Handle Tear,BHT)中的诊断价值及MRI诊断BHT的观察方法。方法:采用敏感度、特异度等指标,盲法回顾分析130例同时行MRI及关节镜(Arthroscope,AS)检查治疗的膝关节损伤患者诊断结果,其中以经关节镜诊断BHT76例作为金标准,评价项目包括:①原始报告诊断;②中央移位的半月板碎片;③双后交叉韧带征;④蝶结消失征。结果:原始报告诊断BHT敏感度为43%,特异度为87%。中央移位的半月板碎片敏感度为72%,特异度为87%。双后交叉韧带征敏感度为31%,特异度为97%。蝶结消失征敏感度为71%,特异度为69%。结论:采用MRI诊断BHT时,中央移位的半月板碎片的特异度和敏感度均较高,而蝶结消失征的敏感度高,特异度低,双后交叉韧带征的特异度最高,敏感度最低。     

MRI评价膝关节半月板的桶柄状撕裂

目的 明确5种MRI征象对膝关节半月板桶柄状撕裂的诊断价值。方法 回顾135例患者139个经关节镜证实的膝关节MR图像，其中19个存在半月板桶柄状撕裂。在均不告知关节镜结果的条件下，由2名有经验的放射医生对所有图像进行独立读片，差异协商解决。每个膝关节均记录如下5种MRI征象：双后交叉韧带征(双PCL征)、半月板翻转征、空领结征、碎块内移征和外周残半月板征。分别计算每种征象诊断半月板桶柄状撕裂的敏感度、特异度、阳性预测值、阴性预测值和准确度。结果 5种征象的诊断敏感度分布于52．6％和89．5％之间，特异度分布于83．3％和98．3％之间，阳性预测值分布于42．9％和88．2％之间，阴性预测值分布：于92．7％和98．3％之间，准确度分布于82．7％和96．4％之间。“碎块内移征”和“外周残半月板征”的诊断敏感度最高，“双PCL征”的诊断特异度和阳性预测值最高，而“碎块内移征”具有最高的阴性预测值和诊断准确度。结论 半月板桶柄状撕裂在MRI上可以有多种表现，各种征象对诊断的能力有所不同。     

“双后交叉韧带征”在膝关节半月板桶柄样撕裂诊断中的价值

目的本文目的主要是介绍和评价“双后交叉韧带征”在膝关节半月板撕裂中的价值。方法分析16例膝关节半月板桶柄样撕裂患者,其中男性11例,女性5例。病史从2周到3年。采用超导MR扫描机,场强1.0T。成像序列主要包括矢状SE T     

膝关节半月板桶柄样撕裂的MR诊断

目的　研究膝关节半月板桶柄样撕裂的MR表现。方法　分析 38例经关节镜证实为半月板桶柄样撕裂的患者术前MR的特征性表现。结果　38例中 30例可见典型的撕裂半月板髁间窝内移位,半月板缺失或部分缺失征象; 5例仅显示半月板撕裂Ⅲ级信号; 3例无异常发现。结论　膝关节半月板桶柄样撕裂典型的MRI表现为撕裂半月板的游离缘关节内移位征象,但是当撕裂的游离缘未发生移位时,仅表现半月板撕裂的 3级信号,且与半月板的上下关节面均相通。     

半月板残破征在桶柄样撕裂中的MRI表现及其诊断价值

<正> 膝关节桶柄样撕裂作为纵行撕裂的特殊形式临床上并不少见,它的治疗方案和一般的半月板损伤不同,需要切除移位的半月板碎块。有关桶柄样撕裂的MRI征象很多,在冠状位及状位均有显示,其诊断价值各不相同。笔者回顾性总结本院经手术或关节镜证实的半月板桶柄样撕裂56例的MRI表现,探讨在矢状位上半月板大小形态的异常改变及其临床意义。     

Meniscal bucket handle tears: a retrospective study of arthroscopy and the relation to MRI

In this study, we aim to evaluate the arthroscopic findings of meniscal bucket handle tears and to correlate them with the proposed MR imaging signs of meniscal bucket handle tears suggested in the literature. Thirty-six patients who had a diagnosis of bucket handle tear in arthroscopy, in either medial or lateral meniscus, were included in our study (32 males and 4 females). Meniscal tears were evaluated in arthroscopy according to Dandys classification. The MRIs were retrospectively analyzed regarding the following findings: absence of bow tie sign, presence of double posterior cruciate ligament (PCL) sign, double anterior horn sign, flipped meniscus sign, disproportional posterior horn sign, and fragment within the intercondylar region. Locked types I and II fragment of medial meniscus and half-length, whole-width and whole length–half-width fragment of lateral meniscus in arthroscopy were basically correlated with fragment within the intercondylar notch and absent bow tie signs in MRI. We did not find the double PCL sign in any of the patients with a lateral meniscal bucket handle tear. The most common signs in MR images of meniscal bucket handle tears were the fragment in the notch sign and the absent bow tie sign. They were observed with equal frequency of 88.8%. The presence of double PCL sign, double anterior horn sign, flipped meniscus sign, disproportional posterior horn sign were less common (41.66, 33, 25, and 27.7%, respectively). We conclude that the presence of at least two of the six MRI signs should be regarded as highly suggestive for bucket handle tears of menisci.     

The value of the absent bow tie sign in MRI of bucket-handle tears

AIM: To assess the accuracy of the absent bow tie sign in diagnosing bucket handle meniscal tears (BHT) of the knee menisci. MATERIALS AND METHODS: During a 3-year period, we correlated the MRI and arthroscopic findings and the presence of the various signs. One hundred and seven knees were reviewed: 74 where either MRI or arthroscopy had identified a BHT and 33 which were either normal (31), or a simple tear was identified (2). All cases were reviewed by a single radiologist with a musculoskeletal interest blinded to the original results. Each was assessed for the presence of (1) a central meniscal fragment, (2) the double posterior cruciate ligament (PCL) sign, (3) the bow tie sign and (4) the contribution of a 3D-volume sequence. RESULTS: Optimal results were obtained using standard sequences and a 3D-volume sequence, giving a sensitivity of 74% and positive predictive value of 89%. The bow tie sign gave a sensitivity of 71% and positive predictive value of 76%, significantly less than previous reports. The 18 BHTs diagnosed by arthroscopy but missed by MRI showed other abnormal findings at MRI and were not reported as normal. CONCLUSION: We were not able to reproduce the previously reported high sensitivity and specificity of the absent bow tie sign. Despite optimization of all factors, the accurate diagnosis of a bucket handle tear remains difficult, and is most reliably made by identifying a central meniscal fragment, rather than relying on secondary signs such as the absent bow tie sign.     

Bucket-handle meniscal tears of the knee: sensitivity and specificity of MRI signs

OBJECTIVE: To determine the sensitivity and specificity of reported MRI signs in the evaluation of bucket-handle tears of the knee. DESIGN AND PATIENTS: A retrospective analysis of 71 knee MR examinations that were read as displaying evidence of a bucket-handle or "bucket-handle type" tear was performed. We evaluated for the presence or absence of the absent bow tie sign, the coronal truncation sign, the double posterior cruciate ligament (PCL) sign, the anterior flipped fragment sign, and a fragment displaced into the intercondylar notch. Sensitivity and specificity were calculated relative to the gold standard of arthroscopy. RESULTS: Forty-three of 71 cases were surgically proven as bucket-handle tears. The absent bow tie sign demonstrated a sensitivity of 88.4%. The presence of at least one of the displaced fragment signs had a sensitivity of 90.7%. A finding of both the absent bow tie sign and one of the displaced fragment signs demonstrated a specificity of 85.7%. The double PCL sign demonstrated a specificity of 100%. The anterior flipped meniscus sign had a specificity of 89.7%. CONCLUSIONS: Bucket-handle tears of the menisci, reported in about 10% of most large series, have been described by several signs with MRI. This report gives the sensitivity and specificity of MRI for bucket-handle tears using each of these signs independently and in combination. MRI is shown to be very accurate for diagnosing bucket-handle tears when two or more of these signs coexist.     

半月板下表面撕裂的MRI影像学表现

目的 探讨半月板下表面撕裂(meniscus lower surtace tear,MLST)的MRI影像学表现及与半月板撕裂传统分型的差异.方法 以"桶柄状撕裂""水平撕裂""复杂撕裂"为关键词,检索2018-06至2021-06在医院影像归档系统(picture archiving and communicatio...     

外伤性膝关节前外侧韧带损伤的MR影像特征及相关性分析

目的探讨外伤所致膝关节前外侧韧带损伤病人的MR影像特征,并分析其与前交叉韧带撕裂、外侧半月板撕裂及骨挫伤的相关性,为深入研究前外侧韧带对膝关节稳定性的作用提供可靠依据。方法回顾性分析2016年1月—2017年2月间因外伤进行膝关节MRI检查的320例病人(共321膝)的影像资料。采用美国GE公司生产的Signa HDe 1.5 T MR扫描设备,分别行膝关节斜矢状面T1WI、质子密度加权成像(PDWI)和冠状面、横断面PDWI扫描。根据前外侧韧带的完整性和损伤部位对所有病人进行分类统计。采用独立性卡方检验对前外侧韧带撕裂与前交叉韧带撕裂、外侧半月板撕裂及骨挫伤的相关性进行分析。结果全部病人膝关节MR影像均可显示前外侧韧带,显示率为100%。151/321膝(47.0%;95%CI为41.6%~52.5%)存在前外侧韧带损伤,其中累及胫骨部、股骨部及半月板部的分别为97膝、96膝及65膝。前交叉韧带撕裂158膝,外侧半月板撕裂98膝,股骨外侧髁挫伤58膝,外侧胫骨平台挫伤71膝,分别与前外侧韧带撕裂具有相关性(均P0.001)。结论 MRI检查可以很好地显示前外侧韧带解剖及其损伤情况。膝关节前外侧韧带损伤与前交叉韧带撕裂、外侧半月板撕裂及膝外侧骨挫伤具有相关性。