Malik Mudasir Hassan, Muhammad Saif-ul Malook, Sajida Majeed.
Diagnostic Accuracy of Ultrasonography in Evaluation of Supraspinatus Tear Taking Magnetic Resonance Imaging as Gold Standard.
Pak J Radiol Jan ;27(2):96-100.

INTRODUCTION: Tears of the rotator cuff are a common occurrence affecting millions of people all over the world. Magnetic resonance (MR) imaging is most accurate imaging modality of evaluating potential causes of shoulder instability.The rotator cuff can also be visualized with non-invasive imaging techniques such as ultrasonography (US). Initial US results in the detection of rotator cuff tears varied, probably due to the use of low frequency transducers and limited experience with the examination procedure. OBJECTIVE: To determine the diagnostic accuracy of Ultrasonography in evaluation of Supraspinatus tear taking Magnetic Resonance Imaging as gold standard. SETTINGS: Study was conducted in the Department of Radiology and Diagnostic Imaging, Bahawal Victoria Hospital Bahawalpur from 29-9-2015 to 28-09-2016. Material and Methods: This was a cross sectional study. The calculated sample size was 135 cases. The data from the study was evaluated by comparing the results of ultrasound and MRI, taking MRI as gold standard and sensitivity and specificity was evaluated. Data was analyzed using SPSS version 19. Descriptive statistics were used to describe the data. Sensitivity, specificity, negative predictive value (NPV), positive predictive value (PPV) and accuracy were calculated for USG using MRI as gold standard. RESULTS: A total of 135 patients were enrolled, majority of the patients were between 41-50 years of age i.e. 34.81% (n=47), mean with standard deviation was calculated as 39.86+4.21 years, 46.67% (n=63) were male and 53.33% (n=72) were females. Frequency of supraspinatus tear was revealed in 21.48% (n=29) while 78.52% (n=106) had no findings of supraspinatus on MRI. Diagnostic accuracy of ultrasonography revealed sensitivity, specificity, positive predictive value, negative predictive value and accuracy rate 86.21%, 95.28%, 83.33%, 96.19% and 93.33% respectively. CONCLUSION: The results of the study concluded that diagnostic accuracy of Ultrasonography for the evaluation of Supraspinatus tear is high and comparable to gold standard Magnetic Resonance Imaging.

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