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Computed tomography has improved precision for prediction of intramuscular fat percent in the M. longissimus thoracis et lumborum in cattle compared to manual grading
Meat Science ( IF 7.1 ) Pub Date : 2018-07-19 , DOI: 10.1016/j.meatsci.2018.07.025
F. Anderson , J. Cook , A. Williams , G.E. Gardner

This study assessed the ability of computed tomography (CT) to predict intramuscular fat (IMF) % in the M. longissimus thoracis et lumborum of 64 cattle undergoing Meat Standards Australia (MSA) marbling score. The striploin was dissected from carcasses at the 12th rib and CT scanned, with IMF% determined at the 12th rib of the M. longissimus thoracis (LT) and the caudal M. longissimus lumborum (LL). Prediction of IMF% using CT in the LT was moderate (R2 = 0.89, RMSE = 1.91) utilising CT pixel density and standard deviation, and better than prediction using MSA marbling score (R2 = 0.81, RMSE = 2.47). Prediction of IMF% in the caudal aspect of the LL was comparatively poor (R2 = 0.63, RMSE = 4.69), with IMF% 1.97% higher in this region (P < .05). CT is a promising non-destructive method for determination of IMF% that was more accurate than MSA marbling score.



中文翻译:

与手动分级相比,计算机断层扫描可提高预测牛的M. longissimus thoracis et lumborum肌内脂肪百分比的精确度

这项研究评估了64头经过澳大利亚肉类标准(MSA)大理石花纹评分的牛的M. longissimus thoracis et lumborum中肌层层析成像(CT)预测肌肉内脂肪(IMF)%的能力。的西冷从尸体在第12肋解剖和CT扫描,与IMF%在第12肋确定M.最长胸外科(LT)和尾部M.最长lumborum(LL)。 利用CT像素密度和标准偏差,在LT中使用CT预测IMF%的程度适中(R 2 = 0.89,RMSE = 1.91),比使用MSA大理石花纹分数(R 2  = 0.81,RMSE = 2.47)的预测要好。对LL尾侧IMF%的预测相对较差(R 2 = 0.63,RMSE = 4.69),而该区域的IMF%提高1.97%(P  <.05)。CT是确定IMF%的有前途的无损方法,比MSA大理石花纹评分更准确。

更新日期:2018-07-19
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