MR microimaging of articular cartilage and contrast enhancement by manganese ions
| Autor: | H. Rumpel, Karl-Heinz Dannhauer, Wilfried Gründer, Klaus Gersonde, Y. Kusaka |
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| Rok vydání: | 1992 |
| Předmět: |
Cartilage
Articular Gadolinium DTPA Magnetic Resonance Spectroscopy Knee Joint Swine Gadolinium chemistry.chemical_element Contrast Media Manganese Bone and Bones Ion Nuclear magnetic resonance medicine Organometallic Compounds Animals Radiology Nuclear Medicine and imaging Femur Growth Plate Temporomandibular Joint Magnetic resonance microscopy Sulfates Cartilage Delayed Gadolinium Enhanced Magnetic Resonance Imaging of Cartilage Histology Anatomy Pentetic Acid Image Enhancement Magnetic Resonance Imaging Temporomandibular joint medicine.anatomical_structure chemistry Manganese Compounds Proteoglycans Chickens |
| Zdroj: | Magnetic resonance in medicine. 24(1) |
| ISSN: | 0740-3194 |
| Popis: | Saline solutions of manganese ions (Mn2+) were used as articular contrast agents in magnetic resonance microscopy (9.4 T) of cartilage of chicken femoral condyles and pig temporomandibular joints. The diffusion of Mn2+ from the articular surface into the cartilage matrix led to a strong contrast enhancement in the cartilage. The combination of the high spatial resolution and the contrast enhancement allowed the visualization of fine structures (tissue types) in the cartilage, which correlate with the tissue zones in histological sections stained with cationic dyes. We assume that the electrostatic interactions between the negatively charged groups of the proteoglycans and Mn2+ are most important for the mechanism of contrast enhancement. Hence, the different signal intensities of the various zones of cartilage indicate differences in density of proteoglycans. The intraarticular injection of the cationic contrast agent could improve the possibility of an early diagnosis of cartilage dysfunction and degeneration. |
| Databáze: | OpenAIRE |
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