J Korean Radiol Soc.  2006 Nov;55(5):487-494. 10.3348/jkrs.2006.55.5.487.

The Usefulness of 3D Quantitative Analysis with Using MRI for Measuring Osteonecrosis of the Femoral Head

• Hwang JY
• Lee SW
• Park YS

• KMID: 2024468
• DOI: http://doi.org/10.3348/jkrs.2006.55.5.487

Abstract

PURPOSE
We wanted to evaluate the usefulness of MRI 3D quantitative analysis for measuring osteonecrosis of the femoral head in comparison with MRI 2D quantitative analysis and quantitative analysis of the specimen.
MATERIALS AND METHODS
For 3 months at our hospital, 14 femoral head specimens with osteonecrosis were obtained after total hip arthroplasty. The patients preoperative MRIs were retrospectively reviewed for quantitative analysis of the size of the necrosis. Each necrotic fraction of the femoral head was measured by 2D quantitative analysis with using mid-coronal and mid-sagittal MRIs, and by 3D quantitative analysis with using serial continuous coronal MRIs and 3D reconstruction software. The necrotic fraction of the specimen was physically measured by the fluid displacement method. The necrotic fraction according to MRI 2D or 3D quantitative analysis was compared with that of the specimen by using Spearman's correlation test.
RESULTS
On the correlative analysis, the necrotic fraction by MRI 2D quantitative analysis and quantitative analysis of the specimen showed moderate correlation (r = 0.657); on the other hand, the necrotic fraction by MRI 3D quantitative analysis and quantitative analysis of the specimen demonstrated a strong correlation (r = 0.952) (p < 0.05).
CONCLUSION
MRI 3D quantitative analysis was more accurate than 2D quantitative analysis using MRI for measuring osteonecrosis of the femoral head. Therefore, it may be useful for predicting the clinical outcome and deciding the proper treatment option.

Keyword

Hip, necrosis; Magnetic resonance (MR), volume measurement; Magnetic resonance (MR), three-dimensional; Femur

MeSH Terms

Arthroplasty, Replacement, Hip
Femur
Hand
Head*
Humans
Magnetic Resonance Imaging*
Necrosis
Osteonecrosis*
Retrospective Studies