Abstract
The stifle region of 18 healthy cattle (14 cows, four bull calves) and the stifles of five bovine cadavers were examined using 7.5 MHz linear or convex and 5 MHz sector transducers. The normal ultrasonographic appearance of soft tissues and bony structures was studied.The homogeneously echogenic patellar and collateral ligaments, the combined tendon of the long digital extensor and peroneus tertius muscles, the popliteus tendon, the anechoic articular cartilage of the femoral trochlea, the echogenic menisci and the hyperechoic bone surfaces were imaged successfully in all cattle and cadavers. The boundaries of the joint pouches only became partially identifiable, when small amounts of anechoic fluid were present in the medial and lateral femorotibial joint pouches. After experimental filling in cadavers, the distended synovial cavities were imaged as clearly demarcated, anechoic areas. Measurement values of cross-sectional diameters of the ligaments, tendons and the popliteal lymph node, the width of normal joint pouches, where visible, and articular cartilage thickness are presented. The established results should serve as reference data for ultrasonography of bovine stifle disorders.
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