MRI Knee - Coronal and Sagittal PDFS - Meniscus tear

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MRI Knee - Coronal and Sagittal PDFS - Meniscus tear

  • These proton-density fat-suppressed (PDFS) images are water sensitive (fluid is bright)
  • A high signal line passes obliquely through the medial meniscus posteriorly
  • This line represents synovial fluid from the knee joint which has leaked into the torn meniscus
  • The line reaches the inferior surface of the meniscus
  • These are the features of an undisplaced meniscal tear

MRI Knee - Sagittal PDFS - Displaced meniscus

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MRI Knee - Sagittal PDFS - Displaced meniscus

  • Part of a torn meniscus can be displaced into another part of the knee joint
  • In this image the anterior part of the meniscus (the anterior horn) is correctly located
  • The posterior horn is displaced such that it is located next to the anterior horn
  • The correct position of the posterior horn is shown