Breeding and Genetics

Usefulness of Cross-Sectional Image to Predict Intramuscular Fat for Feedlot Application Using Real-Time Ultrasound

---

Abstract

The purpose of this project was to determine if it is possible to accurately calculate both %IMF and 12^th–13^th subcutaneous fat from the cross-sectional ribeye image with a guide in place, therefore eliminating the need for four %IMF images. This would make this technology less time consuming and more efficient. The correlation between the traditional longitudinal %IMF and the %IMF from the ribeye image was moderate and in both the case of ether extract %fat and marbling score, the traditional longitudinal %IMF was more highly correlated than the ribeye image %IMF. From this analysis, it can be concluded that the cross-sectional ribeye image would not be as good of a predictor of %IMF as the longitudinal image currently utilized. The accuracy that would be sacrificed may not be worth the time that would be saved by only taking the one crosssectional ribeye image as compared to the four longitudinal %IMF images and the one cross-sectional ribeye image. A more likely solution would be to collect one cross-sectional ribeye image for a subcutaneous fat measurement and one longitudinal image for a %IMF measurement.

Keywords: ASL R1771

How to Cite:

Vogel, K. J., Wilson, D. E., Rouse, G. H., Minick, J. A., Tait, R. G. & Kruser, J., (2003) “Usefulness of Cross-Sectional Image to Predict Intramuscular Fat for Feedlot Application Using Real-Time Ultrasound”, Iowa State University Animal Industry Report 1(1).