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MRI of bone marrow disorders.
D Vanel1, C Dromain, A Tardivon
1Department of Radiology, Institut Gustave-Roussy, 39 rue Camille Desmoulins, F-94805 Villejuif Cedex France.
European Radiology
|February 9, 2000
Summary
Magnetic resonance imaging (MRI) of bone marrow utilizes four key factors: fat-water distribution, bone trabeculae artifacts, diffusion, and contrast media uptake. These techniques aid in diagnosing marrow replacements and conditions like hyperplasia.
Area of Science:
- Radiology
- Medical Imaging
- Bone Marrow Imaging
Background:
- Bone marrow evaluation is crucial for diagnosing various pathologies.
- Magnetic resonance (MR) imaging offers versatile techniques for assessing bone marrow composition and abnormalities.
Purpose of the Study:
- To review the key factors and sequences used in bone marrow MRI.
- To discuss the diagnostic utility and limitations of these MR techniques for specific bone marrow conditions.
Main Methods:
- Utilizing fat-water distribution imaging (T1-weighted, STIR, gradient echo, fat pre-saturation).
- Assessing artifacts from bone trabeculae using gradient echo sequences.
- Evaluating diffusion characteristics with single-shot spin-echo sequences.
- Incorporating contrast media enhancement for improved specificity.
Main Results:
- Specific MR sequences are tailored to evaluate each of the four key factors.
- Contrast media injection offers an efficient method to enhance diagnostic specificity.
- The discussed sequences demonstrate value in differentiating marrow replacements (metastases, lymphoma, leukemia) from hyperplasia or depletion.
Conclusions:
- Four distinct factors, each assessed by specific MR sequences, are essential for comprehensive bone marrow MRI.
- Contrast enhancement is a valuable tool for improving the accuracy of bone marrow MR diagnoses.
- Understanding the capabilities and limitations of these MR techniques is vital for accurate diagnosis of bone marrow pathologies.