PURPOSE: To evaluate the three standard orthogonal imaging planes and a paracoronal imaging plane for anterior cruciate ligament (ACL) tears. MATERIAL AND METHODS: Ninety patients (91 knees; 29 F and 61 M) aged between 15 and 84 years (mean 36.9 +/- 16.4 years) underwent magnetic resonance imaging (MRI) of the knee prior to arthroscopy. At surgery, 32 knees had an intact ACL, 4 a partial tear, and 55 a complete ACL tear. In all patients, axial, sagittal, coronal, and paracoronal T2-weighted turbo-SE images were acquired. The ACL was classified as intact, partially, or completely torn. Partial and complete tears were combined for statistical evaluation. RESULTS: Partial ACL tears (four cases) were not correctly diagnosed at MRI except in one knee by one observer on coronal images. Sensitivity in detecting ACL tears was 95%/63% (reader1/reader2) in the axial, 93%/95% in the sagittal, 93%/86% in the coronal, and 100%/93% in the paracoronal plane. Specificity was 75%/81% in the axial, 72%/81% in the sagittal, 78%/94% in the coronal, and 78%/88% in the paracoronal plane. CONCLUSION: ACL tears can be diagnosed accurately with each of the standard orthogonal planes. Based on reader confidence and interobserver agreement paracoronal images may be useful in equivocal cases.
PURPOSE: To evaluate the three standard orthogonal imaging planes and a paracoronal imaging plane for anterior cruciate ligament (ACL) tears. MATERIAL AND METHODS: Ninety patients (91 knees; 29 F and 61 M) aged between 15 and 84 years (mean 36.9 +/- 16.4 years) underwent magnetic resonance imaging (MRI) of the knee prior to arthroscopy. At surgery, 32 knees had an intact ACL, 4 a partial tear, and 55 a complete ACL tear. In all patients, axial, sagittal, coronal, and paracoronal T2-weighted turbo-SE images were acquired. The ACL was classified as intact, partially, or completely torn. Partial and complete tears were combined for statistical evaluation. RESULTS: Partial ACL tears (four cases) were not correctly diagnosed at MRI except in one knee by one observer on coronal images. Sensitivity in detecting ACL tears was 95%/63% (reader1/reader2) in the axial, 93%/95% in the sagittal, 93%/86% in the coronal, and 100%/93% in the paracoronal plane. Specificity was 75%/81% in the axial, 72%/81% in the sagittal, 78%/94% in the coronal, and 78%/88% in the paracoronal plane. CONCLUSION: ACL tears can be diagnosed accurately with each of the standard orthogonal planes. Based on reader confidence and interobserver agreement paracoronal images may be useful in equivocal cases.
Authors: Wing Hung Alex Ng; James Francis Griffith; Esther Hiu Yee Hung; Bhawan Paunipagar; Billy Kan Yip Law; Patrick Shu Hang Yung Journal: World J Orthop Date: 2011-08-18
Authors: Yung Han; David Kurzencwyg; Adam Hart; Tom Powell; Paul A Martineau Journal: Knee Surg Sports Traumatol Arthrosc Date: 2011-10-11 Impact factor: 4.342
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Authors: Daniel Hensler; Motoko Miyawaki; Kenneth D Illingworth; Carola F van Eck; Freddie H Fu Journal: Knee Surg Sports Traumatol Arthrosc Date: 2013-09-01 Impact factor: 4.342
Authors: Alex Wing Hung Ng; James F Griffith; Kan Yip Law; James W M Ting; George L Tipoe; Anil T Ahuja; Kai Ming Chan Journal: Skeletal Radiol Date: 2011-06-04 Impact factor: 2.199