MAGNETIC RESONANCE IMAGING FINDINGS IN HORSES WITH RECENT ONSET NAVICULAR SYNDROME BUT WITHOUT RADIOGRAPHIC ABNORMALITIES     

SARAH N. SAMPSON  ROBERT K. SCHNEIDER  PATRICK R. GAVIN  CHARLES P. HO  RUSSELL L. TUCKER  ELIZABETH M. CHARLES 《Veterinary radiology & ultrasound》2009,50(4):339-346

Seventy-two horses with recent onset of navicular syndrome and normal radiographs were assessed. Horses underwent magnetic resonance (MR) imaging of both front feet. All abnormalities were characterized and the most severe abnormality identified, if possible. Abnormal signal intensity in the navicular bone was the most severe abnormality in 24 (33%) horses. Pathologic change in the deep digital flexor tendon was the most severe abnormality in 13 (18%) horses. Pathologic change in the collateral sesamoidean ligament was the most severe abnormality in 11 (15%) horses. Pathologic change in the distal sesamoidean impar ligament was the most severe abnormality in seven (10%) horses. Multiple abnormalities were observed in 13 (18%) horses in which an abnormality that was more severe than the others could not be determined. Abnormalities were not observed in the navicular bone or its supporting soft tissues in four (5%) horses. Fifty-six horses had abnormalities that were most severe in one limb; in 52 (93%) horses, the most severe abnormalities were in the foot of the most lame limb. In 7% (4/56) of horses, the most severe findings were in the opposite limb, and in 16 horses, the findings on both limbs were similar. MR imaging is a useful technique for evaluating horses with navicular syndrome and can differentiate between multiple abnormalities. This provides a more specific diagnosis which affects further treatment of the horse. Pathologic changes in different locations in the foot can cause similar clinical signs that, before MR imaging, were categorized as one syndrome.  相似文献   

应用脂肪细胞膜免疫技术调控动物体脂含量的研究进展   总被引：12，自引：0，他引：12  

邓跃林  霍启光  齐广海  陈阳城 《动物营养学报》2000,(4)

本文综述了脂肪细胞膜免疫对动物生产性能、屠宰率、胴体品质的影响以及脂肪细胞膜免疫降低动物胴体脂肪的作用机理 ,并展望了脂肪细胞膜免疫技术的发展方向和应用前景。  相似文献   

Integration of environmental, agronomic, and economic aspects of fertilizer management   总被引：5，自引：0，他引：5  

PA Matson  R Naylor  I Ortiz-Monasterio 《Science (New York, N.Y.)》1998,280(5360):112-115

Nitrogen fertilization is a substantial source of nitrogen-containing trace gases that have both regional and global consequences. In the intensive wheat systems of Mexico, typical fertilization practices lead to extremely high fluxes of nitrous oxide (N2O) and nitric oxide (NO). In experiments, lower rates of nitrogen fertilizer, applied later in the crop cycle, reduced the loss of nitrogen without affecting yield and grain quality. Economic analyses projected this alternative practice to save 12 to 17 percent of after-tax profits. A knowledge-intensive approach to fertilizer management can substitute for higher levels of inputs, saving farmers money and reducing environmental costs.  相似文献