Error patterns in the MR imaging evaluation of menisci of the knee.

Abstract:

PURPOSE:To categorize errors in interpretation of magnetic resonance (MR) images of the knee and explain the discrepancy between MR imaging and diagnostic arthroscopic findings. MATERIALS AND METHODS:Five hundred sixty-one patients underwent arthroscopy and MR imaging of the knee. Prospective and retrospective readings were used to categorize tear type and location. Sixty-six patients had 68 discrepancies between MR imaging and arthroscopic findings. RESULTS:Prospective interpretation of MR images of the lateral meniscus had a sensitivity of 82%, specificity of 98%, and accuracy of 93%. For images of the medial meniscus, sensitivity was 96%; specificity, 91%; and accuracy, 95%. The number of diagnostic errors at retrospective analysis was 76% (n = 52) of the number at prospective analysis. CONCLUSION:MR imaging is accurate in evaluation for meniscal tears. Most errors in interpretation that occur at prospective evaluation also occur at retrospective evaluation. Some false-positive errors may be related to incomplete arthroscopic evaluation of the meniscus and confusion between what represents fraying and what represents a tear.

journal_name

Radiology

journal_title

Radiology

authors

Justice WW,Quinn SF

doi

10.1148/radiology.196.3.7644620

subject

Has Abstract

pub_date

1995-09-01 00:00:00

pages

617-21

issue

3

eissn

0033-8419

issn

1527-1315

journal_volume

196

pub_type

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