[Magnetic resonance tomography--a possibility for non-invasive meniscus diagnosis. 1. Experimentally produced lesions].
Meniscus tears were experimentally produced by surgery in 5 pigs. They were identified via MR tomography with the selected routine sequence (SE: TR 1600, TE 22/80 msec, SD 3 mm) independent of position, orientation and severity. The best imaging was obtained between the 2nd and 8th weeks after the operation in the sagittal plane. Subsequently the contrast and with it simultaneously the delineation between intact fibrous cartilage and rupture cleft decreased; this could be observed in sequences weighted according to proton density and T2 in different degrees of intensity. Parallel to this a trial to induce degeneration in the meniscus tissue resulted 8 weeks after the operation in central, signal-intensive zones in the menisci. No success was achieved in trying to improve imaging of the pathological changes by means of intraarticular injections of Gd-DTPA; this was tried out at various points of time. Besides enabling the imaging of lesions of the fibrous cartilage as a matter of principle, MR tomography can also give limited information on the age of a meniscus tear.
Wacker
F
F
Radiologische Klinik, Universität Tübingen.
König
H
H
Sell
S
S
D000818:Animals; D007718:Knee Injuries / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D013552:Swine; D000070600:Tibial Meniscus Injuries
Kernspintomographie--Eine Möglichkeit nicht-invasiver Meniskusdiagnostik. Teil 1: Experimentell gesetzte Läsionen.