[Volumes of synovial membrane and joint effusion determined by MR imaging. Markers of severity and/or activity in rheumatoid arthritis?].

Volumes of synovial membrane and joint effusion were determined by MRI in 36 knees with gonarthritis and five healthy knees. In 18 knees MRI was performed before and immediately after arthrocentesis. The difference between MRI-determined and syringe-determined volumes of aspirated joint fluid was 0-7 ml, median 2 ml, corresponding to 0-18%, median 7%, of the pre-aspiration effusion volume.

[Magnetic resonance in hematological diseases. Imaging of bone marrow].

Magnetic resonance imaging (MRI) is a highly sensitive alternative to plain radiography, CT, and radionuclide studies for the imaging of normal and abnormal bone marrow. The cellularity and the corresponding fat/water ratio within the bone marrow show clear changes in haematological diseases. This enables MRI to detect differences between fatty, fibrotic, aplastic and hypercellular marrow in patients with haematological disease.

[Magnetic resonance imaging of the cardiovascular system].

Magnetic resonance (MR) is a noninvasive technique to obtain tomographic images in any desired plane of the body. MR offers possibilities not only for morphologic imaging, but also for various physiological measurements, e.g.

[Magnetic resonance imaging (MRI) in central pontine myelinolysis].

Three cases of central pontine myelinolysis (CPM) including magnetic resonance (MRI), are presented and the literature describing the pathological physiological background for the appearance in MRI is reviewed. MRI is recommended as the method of choice in cases of suspected CPM.