Abstract：Objective To investigate whether MR imaging of knees in a side-lying and buckling to maximum position can improve the diagnostic rate of anterior cruciate ligament (ACL) partial tear.Methods Three hundred and twenty-four patients who were diagnosed with ACL partial tear were included in this study. According to the difference of intervals between the time of injury and the time for MR imaging, these patients were divided into three groups: the subacute, intermediate and chronic groups. All the patients underwent MR imaging in both the routine, side-lying and buckling to maximum position, and knee arthroscopy was performed after the MR scan. Three radiologists were invited to make a diagnosis through blind evaluation of the MR images acquired in the routine knee position. The diagnostic results were saved as group A. The MR images of the routine and side-lying and buckling to maximum position of knees were subjected to blind evaluation by another three radiologists after three months, and the diagnostic results were saved as group B, with the results of knee arthroscopy as reference. The difference between these two groups was analyzed statistically.Results The diagnostic rate of group B was comparable to the result of knee arthroscopy. The positive diagnostic rate of group B was much higher than that of group A.Conclusions MR imaging in the side-lying and buckling position of the knee can improve the diagnostic rate of patients with anterior cruciate ligament partial tear, and this MR imaging method is more sensitive for diagnosing patients with ACL partial tear more than 3 months after injury.
McCauley T R,Moses M,Kier R,et al.MR Diagnosis of Tears of Anterior Cruciate Ligament of the Knee: Importance of Ancillary Findings[J].AJR,1994,162(7):115-119.
[2]
McNally E G,Nasser K N,Dawson S,et al.Role of magnetic resonance imaging in the clinical management of the acutely locked knee[J].Skeletal Radiol,2002,31(4):570-573.
[3]
Roychowdhury S, Fitzergerald S W,Sonin A H,et al.Using MR Imaging to Diagnose PartialTears of the Anterior Cruciate Ligament: Value of Axial Images[J].AJR, 1997,168(11):1487-1491.
[4]
Chen W T, Shih T T, Tu H Y, et al. Partial and complete tear of the anterior cruciate ligament[J]. Acta Radiol,2002,43(9):511-516.
[5]
Hofbauer M, Muller B, Murawski C D, et al. Theconcept of individualized anatomic anterior cruciateligament(ACL) reconstruction[J].KSSTA, 2014,22(5):979-986.
[6]
Ng A W,Lee R K,Ho E P,et al.Anterior cruciateligament bundle measurement by MRI[J].Skeletal Radiol,2013,42(6):1549-1554.
Davies N H, Niall D, King L J, et al. Magnetic resonance imaging of bone bruising in the acutely injured knee-short-term outcome[J]. Clin Radiol,2004,59(12):439-445.
[9]
Bretlau T, Tuxoe J,Larsen L,et al.Bone bruise in the acutely injured knee[J].KSSTA,2002,10(4):96-101.
[10]
Borbon C A, Mouzopoulos G, Siebold R. Why perform an ACL augmentation?[J]. KSSTA,2012,20(7):245-251.
Katahira K, Yamashita Y, Takahashi M, et al. MR Imaging of the Anterior Cruciate Ligament: Value of thin Slice Direct Oblique coronal Technique[J]. Radiat Med,2001,19(8):1-7.
[13]
Hong S H, Choi J Y, Lee G K, et al.Grading of ACL injury: Diagnostic efficacy of oblique coronal MRI of the knee[J].J Cat,2003,27(5):814-819.
[14]
Padulo J, Oliva F, Frizziero A, et al. Muscles, Ligaments and Tendons Journal. Basic principles and recommendations in clinical and field science research: 2016 update[J]. MLTJ.2016,6(1):1-5.
[15]
Delin C, Silvera S, Coste J, et al. Reliability and diagnostic accuracy of qualitative evaluation of diffusion-weighted MRI combined with conventional MRI in differentiating between complete and partial anterior cruciate ligament tears[J].Eur Radiol, 2013,23(10):845-854.
[16]
Breitenseher M J, Mayerhoefer M E. Oblique MR Imaging of the Anterior Cruciate Ligament Based on Three-Dimensional Orientation[J].Magnetic Res Imaging,2007,26(7):794-798.
2017, Vol. 28 
