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Magnetic resonance imaging in the foot and ankle
1Peninsula Imaging Center, Burlingame, California.
Abstract:
The first image obtained in a live human with MR was performed in July 1977. It took 4 hours and 45 minutes to produce a single slice. Imaging devices became available routinely in late 1982 and early 1983. Since that time, dramatic technologic growth and improvement has brought MR to the forefront of radiology. It is now believed to be the modality of choice for delineating and staging soft-tissue abnormalities and also shows great promise for evaluating marrow replacing processes. Recently, hyaline cartilage has been identified with MR. Previously in radiology, hyaline cartilage could only be identified when it was outlined by contrast material. Cartilage per se is not a radiographic density. MRI therefore offers potential hope as a cartilage-imaging modality. In addition, the synovium is well delineated with MRI, and it is conceivable that in the future we will use MRI to quantitate synovial proliferation and to monitor response to therapy. The future is quite bright. Currently, spatial resolutions below 1 mm are common with slice thicknesses available at 2 to 2.5 mm. In the future, however, sections will become thinner, spatial resolution will become greater, and localized radiofrequency coils will be developed for specific anatomic regions. Practicing podiatrists should now consider MR a useful tool in the imaging armamentarium.
Insights
Magnetic Resonance (MR) imaging has rapidly advanced since 1977, becoming a leading tool in radiology. Modern MR imaging now enables detailed visualization of soft tissues, cartilage, and synovium, offering new diagnostic possibilities.
Area of Science:
- Radiology
- Medical Imaging
- Biomedical Engineering
Background:
- Magnetic Resonance (MR) imaging technology has evolved significantly since the first live human scan in 1977.
- Initial MR imaging was time-consuming, but technological advancements have made it a cornerstone of modern radiology.
Purpose of the Study:
- To highlight the advancements in MR imaging technology and its expanding applications in clinical practice.
- To emphasize MR imaging's current and future potential in diagnosing soft-tissue abnormalities, marrow processes, cartilage, and synovial conditions.
Main Methods:
- Review of the technological evolution of MR imaging devices and capabilities.
- Discussion of the diagnostic utility of MR imaging for various anatomical structures and pathological conditions.
Main Results:
- MR imaging is now the preferred method for soft-tissue abnormality staging and shows promise for marrow evaluation.
- Hyaline cartilage, previously difficult to visualize, is now identifiable with MR imaging.
- Synovium is well-delineated, with future potential for quantitative assessment and therapy monitoring.
Conclusions:
- MR imaging has become an indispensable tool in radiology, offering unprecedented detail for soft-tissue and cartilage evaluation.
- Future advancements in MR imaging, including higher resolution and specialized coils, will further enhance its diagnostic capabilities.
- Podiatrists and other clinicians should consider MR imaging a valuable tool for patient diagnosis and management.