The maximum depth of the echo target observed by the veterinary B-ultrasound equipment under the conditions of the maximum sensitivity and brightness allowed by the normal display of the image is called the detection depth. The larger the value, the wider the range of veterinary B-ultrasound examination can be performed in the animal body. However, there are several factors that affect this performance:

The sensitivity of the veterinary B-ultrasound transducer. The transducer realizes the electrical-acoustic and acoustic-electric conversion efficiency during the transmission and reception of ultrasonic waves. The higher the sensitivity, the greater the detection depth. The sensitivity mainly depends on the electromechanical properties of the chip and the matching status of the acoustic and electrical matching layers of the transducer.

The transmitting power of the veterinary B-ultrasound. Increasing the acoustic power radiated by the transducer can increase the detection depth. However, increasing the acoustic power requires increasing the transmitting voltage of the circuit. This not only brings difficulties to the design of the veterinary B-ultrasound machine, but also requires limiting the acoustic power within the safe dose threshold. Its technical indicators are often expressed by sound intensity, that is, the sound intensity should not exceed 10 mW/cm2.

The gain of the veterinary B-ultrasound receiving amplifier. Increasing the gain of the receiving amplifier can increase the detection depth. However, the increase in amplifier gain amplifies the weak echo signal while also amplifying the noise signal of the veterinary B-ultrasound system, so that the useful signal is submerged in the noise, so the gain should be moderate.

The working frequency of veterinary B-ultrasound and the acoustic attenuation coefficient of the animal's body tissue are linearly related to the frequency. The lower the frequency, the longer the slope length, the smaller the amplitude attenuation, and the greater the detection depth. But the resolution becomes worse. On the contrary, the higher the frequency, the smaller the detection depth, but the resolution becomes better. In order to improve the working performance of the whole machine, dynamic frequency scanning and dynamic tracking filtering technology are generally adopted. It is to take high resolution and detection depth into account. Nevertheless, in order to meet clinical needs, different transducers still need to be designed to diagnose different parts of the organism.