TY  - JOUR
T1  - Ultrasound Measurement of Backfat Thickness and Longissimus Muscle Area in Live Swine: Effects of Equipment, Personnel and Pigs Pose
AU - Zhu, Li AU - Jiang, Xiaobing AU - Zhang, Liang AU - Chen, Siqing AU - Wang, Ketian AU - Chen, Zhuping AU - Chen, Lei AU - Wang, Jinyong 
JO  - Journal of Animal and Veterinary Advances
VL  - 13
IS  - 8
SP  - 506
EP  - 513
PY  - 2014
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2014.506.513
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2014.506.513
KW  - Ultrasonic measurement
KW  -in vivo measurement
KW  -backfat thickness
KW  -longissimus muscle area
KW  -accuracy
KW  -swine
AB  - Ultrasound measure is an important tool to evaluate carcass 
  merit in live swine and the accuracy of ultrasonic measurement directly related 
  to the breeding process. Here, researchers studied the effects of machine, posture 
  and technician factors on the accuracy of ultrasonic measurement in live swine. 
  The results indicated that the accuracy of A-mode ultrasonic machine measurement 
  was lower than B-mode ultrasonic machine measurement and the accuracy of B-mode 
  ultrasonic machine with equipped 3.5 MHz linear array probe performed the highest 
  accuracy. Measured through the ultrasonic machine back fat thickness obtained 
  from both the posture of bowing back (p<0.01) and standing posture with mouth 
  contacting with the ground (p<0.05) were statistically significant different 
  from the real carcass backfat thickness. Obtained from the posture of pigs were 
  standing naturally both backfat thickness and logissimus muscle area were most 
  approximated to the true value. During the operation of ultrasonic machine, 
  the value of backfat thickness recognised by unexperienced technicians was statistically 
  significantly different (p<0.01) from the true value. Thus in the process 
  of measure both back fat thickness and logissimus muscle area through ultrasonic 
  machine, the types of machine, the posture of pig standing and the skill level 
  of technicians were validated to influence the obtaining of true value. In conclusion, 
  the results indicated that the accuracy of ultrasonic measurement can be improved 
  by suitable machines and probes, obtain picture while pig are standing naturally 
  and skilled technicians.
ER  -