Diagnostic Accuracy and Agreement between Magnetic Resonance Imaging and Ultrasound Finding for the Diagnosis of Rotator Cuff Tears

Shabana .; Muhammed Akhtar; Asma Noor; Mohammed Ashfaq; Tayyaba Ashfaq; Zahid Raza Shah

doi:10.51253/pafmj.v73i1.5267

Authors

Shabana . Combined Military Hospital, Abbottabad/National University of Medical of Sciences (NUMS) Pakistan
Muhammed Akhtar Combined Military Hospital, Abbottabad/National University of Medical of Sciences (NUMS) Pakistan
Asma Noor Combined Military Hospital, Abbottabad/National University of Medical of Sciences (NUMS) Pakistan
Mohammed Ashfaq Combined Military Hospital, Abbottabad/National University of Medical of Sciences (NUMS) Pakistan
Tayyaba Ashfaq Combined Military Hospital, Zhob/National University of Medical of Sciences (NUMS) Pakistan
Zahid Raza Shah Pakistan Naval Ship Shifa Hospital, Karachi Pakistan

DOI:

https://doi.org/10.51253/pafmj.v73i1.5267

Keywords:

Rotator cuff tears, Ultrasound, MRI, Agreement

Abstract

Objective: To determine the diagnostic accuracy and agreement between ultrasound and magnetic resonance (MR) imaging in determining rotator cuff tears.

Study Design: Cross-sectional study.

Place and Duration of the Study: Armed Forces Institute of Radiology and Imaging, Pak Emirates Military Hospital,Rawalpindi Pakistan, from Jul 2018 to Jan 2019.

Methodology: Patients of either gender with a traumatic shoulder injury duration of less than 15 days were consecutively included. Rotator cuff tear on ultrasonography was diagnosed on the presence of a hypoechoic discontinuity in the tendon and accentuation of cartilage shadow, giving a 'double cortex' view while on MRI, the hyper-intense signal area within the tendon on T2W, fat-suppressed and GRE sequences, corresponding to fluid signal seen.

Results: Of 88 patients, the mean age was 54.022±5.19 years. Ultrasound diagnosed rotator cuff tears in 42(47.7%) patients, and MRI diagnosed rotator cuff tears in 44(50.0%) patients. Diagnostic accuracy of ultrasound taking MR imaging as the gold standard showed sensitivity as 81.82%, specificity as 77.27%, negative predicted value as 78.26%, positive predicted value as 80.95%, and overall diagnostic accuracy as 79.55%. A moderate agreement was found between ultrasound and MRI findings (p-value=0.591).

Conclusion: The findings of the current study showed significant moderate agreement between ultrasound and MR imaging in the determination of rotator-cuff tears.