- 期刊
Tear of the Anterior Cruciate Ligament: Evaluations with MR Imaging
前十字韌帶斷裂於磁振造影術之評估
摘要
16位膝關節受傷之病人，其中十位病人在磁場強度0.5Tesla之磁振造影(MR) 儀以頭圈作查，另外六位病人於1.5 Tesla之MR造影儀以膝關節圈作檢查。其中八例有前十字韌帶(ACL) 斷裂，另八例其他韌帶、半月軟骨或骨頭受傷，但ACL完整。所有病例皆接受關節創鏡診斷及得到證實。吾人評估CAL斷裂有主要及次要的MR 徵象，主要徵象包括ACL本身狀況，次要徵象包括脛骨平高線外後方之骨挫傷，外股骨髁狀突之骨挫傷，或兩者皆有(所謂接吻性骨挫傷)，脛骨平高線外後方骨折，Segond骨折，脛骨往前移位大於五公釐，後十字韌帶(PCL)彎曲，PCL線呈陽性及股骨凹陷大1.5公釐。結果顯示，在八例ACL斷裂中，5例(62.5%)顯示ACL增厚及水腫，3例(37.5%)有接吻性骨挫傷，1例(12.5%)Segond骨折，2例(25%)PCL彎曲，2例(25%)外股骨凹陷大於1.5公釐，2例(25%)脛骨往前移位及0例PCL線呈陽性。於三例慢性ACL斷裂(50%)中，ACL呈現正常的低訊號。其化次要徵象包括1例外股骨髁狀突之骨挫傷(12.5%)，1例脛骨平高線外後方骨折(12.5%)，1例pcl彎曲(12.5%)及1例pcl線呈陽性(12.5%)。 結果為MR主要徵象對診斷ACL斷裂非常重要，次要徵象是有幫助的，但在ACL正常的膝部受傷中也可能出現。
關鍵字
無資料並列摘要
Sixteen patients with traumatic injury to the knees were surveyed with magnetic resonance (MR) machines with filed strength of either 0.5 Tesla (T) using head coil (10 cases) or 1.5 T using dedicated knee coil (6 cases). Tears of the anterior cruciate ligament (ACL) were found in eight cases. The other eight cases had injuries of the other ligaments, mentscus or bone with intact ACL. All cases were proved by arthroscopy. Primary and secondary signs of the ACL tears were evaluated by MR imaging. Primary signs included the status of ACL. Secondary signs consisted of bone bruise in the posterolateral tibial plateau, in the lateral femoral condyle, or both (so-called kissing bone bruise), fracture at the posterolateral tibial plateau, Segond fracture, anterior dislocation of the tibia (＞5 mm), buckled posterior cruciate ligament (PCL), positive PCL line and the deep lateral femoral notch (＞1.5 mm). Of the eight cases of the ACL tears, 5 cases (62.5%)revealed thickening and edema of the ACL, 3 cases (37.5%)kissing bone bruise, 1 case (12.5%) Segond fracture, 2 cases (25%) buckled PCL, 2 cases (25%) deep lateral femoral notch, 2 cases (25%) anterior dislocation of the tibia and 0 case (0%) positive PCL line. The ACL had normal thickness of low signal intensity in 3 cases of chronic ACL tears (50%). Lateral meniscal tears were found in seven of the eight cases of ACL tears (87.5%). For the eight cases with intact ACL, the ACL was normal in thickness and of low signal intensity. Other findings were bone bruise in the lateral femoral condyle (1 case, 12.5%), fracture at the posterolateral tibial plateau (1 case, 12.5%), buckled PCL (1 case, 12.5%) and positive PCL line (1 case, 12.5%).