Ji Hyun Lee1, Young Cheol Yoon2, Jee Young Jung3, Jae Chul Yoo4. 1. Department of Radiology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea. carrot302@hotmail.com. 2. Department of Radiology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea. youngcheol.yoon@gmail.com. 3. Department of Radiology, Chungang University Hospital, Chungang University School of Medicine, Seoul, Korea. tasteberry2000@hanmail.net. 4. Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul, Korea. shoulderyoo@gmail.com.
Abstract
OBJECTIVES: To compare the accuracy of indirect magnetic resonance arthrography and noncontrast magnetic resonance imaging for diagnosing rotator cuff tears. MATERIALS AND METHODS: In total, 333 patients who underwent noncontrast magnetic resonance imaging or indirect magnetic resonance arthrography were included retrospectively. Two musculoskeletal radiologists evaluated the images for the presence of supraspinatus-infraspinatus and subscapularis tendon tears. The overall diagnostic performance was calculated using the arthroscopic findings as the reference standard. Statistical differences between the diagnostic performances of the two methods were analyzed. RESULTS: Ninety-six and 237 patients who underwent noncontrast magnetic resonance imaging and indirect magnetic resonance arthrography were assigned into groups A and B, respectively. Sensitivity for diagnosing articular-surface partial-thickness supraspinatus-infraspinatus tendon tear was slightly higher in group B than in group A. Statistical significance was confirmed by multivariate analysis using the generalized estimating equation (p = 0.046). The specificity for diagnosing subscapularis tendon tear (85% vs. 68%, p = 0.012) and grading accuracy (57% vs. 40%, p = 0.005) was higher in group B than in group A; the differences were statistically significant for one out of two readers. Univariate analysis using the generalized estimating equation showed that the accuracy for diagnosing subscapularis tendon tear in group B was higher than in group A (p = 0.042). There were no statistically significant differences between the diagnostic performances of both methods for any other parameters. CONCLUSION: Indirect magnetic resonance arthrography may facilitate more accurate diagnosis and grading of subscapularis tendon tears compared with noncontrast magnetic resonance imaging.
OBJECTIVES: To compare the accuracy of indirect magnetic resonance arthrography and noncontrast magnetic resonance imaging for diagnosing rotator cuff tears. MATERIALS AND METHODS: In total, 333 patients who underwent noncontrast magnetic resonance imaging or indirect magnetic resonance arthrography were included retrospectively. Two musculoskeletal radiologists evaluated the images for the presence of supraspinatus-infraspinatus and subscapularis tendon tears. The overall diagnostic performance was calculated using the arthroscopic findings as the reference standard. Statistical differences between the diagnostic performances of the two methods were analyzed. RESULTS: Ninety-six and 237 patients who underwent noncontrast magnetic resonance imaging and indirect magnetic resonance arthrography were assigned into groups A and B, respectively. Sensitivity for diagnosing articular-surface partial-thickness supraspinatus-infraspinatus tendon tear was slightly higher in group B than in group A. Statistical significance was confirmed by multivariate analysis using the generalized estimating equation (p = 0.046). The specificity for diagnosing subscapularis tendon tear (85% vs. 68%, p = 0.012) and grading accuracy (57% vs. 40%, p = 0.005) was higher in group B than in group A; the differences were statistically significant for one out of two readers. Univariate analysis using the generalized estimating equation showed that the accuracy for diagnosing subscapularis tendon tear in group B was higher than in group A (p = 0.042). There were no statistically significant differences between the diagnostic performances of both methods for any other parameters. CONCLUSION: Indirect magnetic resonance arthrography may facilitate more accurate diagnosis and grading of subscapularis tendon tears compared with noncontrast magnetic resonance imaging.
Entities:
Keywords:
Indirect MR arthrography; Magnetic resonance imaging; Rotator cuff; Shoulder
Authors: Steven C Wagner; Mark E Schweitzer; William B Morrison; John M Fenlin; Arthur R Bartolozzi Journal: Radiology Date: 2002-01 Impact factor: 11.105
Authors: Dae Kun Oh; Young Cheol Yoon; Jong Won Kwon; Sang-Hee Choi; Jee Young Jung; Sooho Bae; Jaechul Yoo Journal: AJR Am J Roentgenol Date: 2009-02 Impact factor: 3.959