Measurement of back fat thickness of breeding pigs. In the veterinary B-ultrasound image, 3-4 obvious strong echo bands can be seen. The first band is the ultrasound reflection of the skin interface. The second band is the reflection of the interfat fascia. The third band is the reflection of the eye muscle membrane. According to the screen ruler, the vertical distance from the first band to the third band 4 cm away from the strong echo point of the spine is the back fat thickness. After determining the starting point and the end point during measurement, the fat thickness in millimeters is displayed on the veterinary B-ultrasound screen. Determination of Eye muscle area. In the veterinary B-ultrasound image, due to the strong reflection of the eye muscle membrane, a clearly visible, approximately elliptical eye muscle outline is produced. Since the upper and lower boundaries of the eye muscle fascia are directly opposite to the ultrasound emission line, a linear boundary is produced: however, only dot-shaped echo bands are produced at both ends. When measuring, first determine the short axis of the ellipse at the upper and lower boundaries, and then determine the long axis of the ellipse at both ends. The square centimeter value of the approximately elliptical eye muscle area is displayed on the screen.

Disease diagnosis Many diseases in pig farms can be preliminarily diagnosed by veterinary B-ultrasound, especially reproductive tract diseases. Veterinary B-ultrasound monitors ovarian dysfunction or disease, uterine disease, and testicular and accessory gland diseases of boars. Other diseases such as liver and kidney lesions, internal and external masses, etc. Veterinary B-ultrasound can be used for characteristic diagnosis.

Veterinary B-ultrasound is used to measure various fetal indicators to determine the gestational age of the fetus and predict the date of delivery: using veterinary B-ultrasound to predict the number of fetuses is a deeper application of B-ultrasound, which requires certain operating experience. Using veterinary B-ultrasound to regularly track and monitor pregnant sows can not only monitor the development of the fetus, but also promptly detect abnormal conditions such as stillbirth and postpartum uterine involution.

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