Detection of partial-thickness supraspinatus tendon tears: is a single direct MR arthrography series in ABER position as accurate as conventional MR arthrographyReportar como inadecuado




Detection of partial-thickness supraspinatus tendon tears: is a single direct MR arthrography series in ABER position as accurate as conventional MR arthrography - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Skeletal Radiology

, Volume 38, Issue 10, pp 967–975

First Online: 18 March 2009Received: 31 December 2008Revised: 23 February 2009Accepted: 01 March 2009

Abstract

PurposeThe purpose of this study was to retrospectively evaluate sensitivity and specificity of a single magnetic resonance MR arthrography series in abduction external rotation ABER position compared with conventional MR arthrography for detection of supraspinatus tendon tears, with arthroscopy as gold standard, and to assess interobserver variability.

Materials and methodsInstitutional review board approval was obtained; informed consent was waived. MR arthrograms of 250 patients 170 men and 80 women; mean age, 36 years were retrospectively and independently evaluated by three observers. Oblique coronal T1-weighted fat-suppressed images, proton density, and T2-weighted images and axial T1-weighted images and oblique sagittal T1-weighted fat-suppressed images were analyzed to detect supraspinatus tendon tears. Separately, a single T1-weighted fat-suppressed oblique axial series in ABER position was evaluated. Both protocols were scored randomly without knowledge of patients- clinical history and arthroscopy results. Tears were subclassified, based on articular surface integrity and extension Lee classification. Interobserver agreement was assessed by kappa statistics for all patients. Ninety-two of 250 patients underwent arthroscopy; sensitivity and specificity of ABER and conventional MR arthrography were calculated and compared using paired McNemar test.

ResultsWeighted kappa values of ABER and conventional MR arthrography were 0.48–0.65 and 0.60–0.67, respectively. According to arthroscopy, 69 of 92 patients had an intact cuff, and 23 patients had a cuff tear 16 partial thickness and seven full thickness. There were no statistically significant differences between ABER and conventional MR arthrography regarding sensitivity 48–61% and 52–70%, respectively and specificity 80–94% and 91–95%.

ConclusionSensitivity and specificity of a single T1-weighted series in ABER position and conventional MR arthrography are comparable for assessment of rotator cuff tears.

KeywordsShoulder joint Magnetic resonance imaging Arthrography ABER Rotator cuff No financial relationship to disclose.

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Autor: Saskia A. Schreinemachers - Victor P. M. van der Hulst - W. Jaap Willems - Shandra Bipat - Henk-Jan van der Woude

Fuente: https://link.springer.com/







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