Table 1 relates the final ultrasound scan to the
corresponding carcass measurements at harvest. The mean
values and rank for fat cover and rib eye area indicate that
the real-time ultrasound measurements were similar to
carcass measurements. Fat cover measured on the carcass
was 0.07 inches fatter than the ultrasound prediction, similar
results have been observed in earlier studies, suggesting that
on fatter cattle, ultrasound, usually underestimates the
carcass measurement. Mean values for rib eye area were
15.1 and 15.0 for carcass and ultrasound respectively.
Percent intramuscular fat ultrasound predictions are within
parameters established in model development and reflect
accurately an intramuscular fat level higher than most of the
rib samples from cattle utilized in model development