[Imaging of the hip in healthy children in MRI: evaluation of the acetabular coverage]

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B Domenech1, C Baunin, J Sales de Gauzy

  • 1Service d'imagerie pédiatrique, Hôpital des Enfants Toulouse, 330 avenue de Grande-Bretagne, BP 3119, 31026 Toulouse.

Journal De Radiologie
|March 29, 2002
PubMed

Insights

This study establishes reference values for acetabular coverage in children using MR imaging. Acetabular-Head Index measurements are reproducible and decrease with age, aiding in understanding hip development.

Area of Science:

  • Pediatric Radiology
  • Orthopedic Imaging
  • Developmental Dysplasia of the Hip

Context:

  • Acetabular coverage is crucial for hip joint stability.
  • Accurate measurement is essential for diagnosing hip abnormalities in children.
  • MR imaging offers detailed visualization of hip anatomy.

Purpose:

  • To define reference values for acetabular coverage using MR imaging in healthy children.
  • To establish normal ranges for the Acetabular-Head Index (AHI) on coronal and sagittal views.
  • To assess the reproducibility and age-related changes in acetabular coverage.

Summary:

  • MR imaging was used to prospectively study acetabular coverage in 72 hips of 36 children over one year.
  • Acetabular-Head Index (AHI) was measured using both bone and cartilage landmarks on T1-weighted spin-echo images.
  • Results indicate symmetrical acetabular coverage that decreases with age and is reproducible.

Impact:

  • MR imaging provides reproducible acetabular coverage measurements, particularly using cartilage landmarks.
  • A suggested inferior limit for AHI (83, mean 1SD) based on cartilage is proposed.
  • Introduction of sagittal AHI values aids in understanding the relationship between the femoral head and acetabulum.
Abstract

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