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Fundamentals of B-ultrasound imaging for pigs

Edit: Henan Tianchi Instrument Equipment Co., Ltd    Date:2020-04-26
Pig B-mode ultrasound generates low-intensity, high-frequency sound waves through electrical stimulation of the piezoelectric crystal in the transducer (probe). These waves do not pass through the air, so the probe surface must be "coupled" to the tissue with gel or oil. Hair, dirt, feces and other debris can also cause interference. The number of crystals or components in the probe plays an important role in determining the image quality of the machine. Therefore, the probe usually accounts for 1/3 of the machine cost.
When the detector reflects or "echoes" the tissues and objects they encounter, the sound waves are emitted and received by the detector. Soft tissues, especially liquid-filled objects, absorb many sound waves and have few echoes (shown as black), while hard tissues absorb few sound waves and show many echoes (shown as white). Therefore, the "echoicity" of the changes in the examined tissue is interpreted by the machine and displayed on the monitor as 32 or 64 gray scales (black to white), which represent thin (eg, 2 mm), 2-dimensional slices. organization. The image on the monitor is "real time" because the transmission and reception of ultrasonic waves are constant, and the display is rapidly updated at many frames / second.
Some probes are linear and the crystals are arranged in a linear array to produce square or rectangular images, while other probes are fan-shaped and the crystals are arranged on a rotating platform to produce pie-shaped images. Linear probes are ideal for inspecting large (ie, wide) ultrasonic windows, while sector probes generally allow people to examine smaller areas in more detail. Linear probes are usually ideal for back fat / lumbar muscle measurement and transrectal reproductive imaging, while fan-shaped probes are usually suitable for transabdominal reproductive imaging, such as pregnancy diagnosis. The resolution of the probe depends on its frequency (in megahertz, megahertz). Compared with high-frequency probes, low-frequency probes provide deeper tissue penetration but lower image resolution.
Related Reading:Application Range Of Veterinary B Ultrasound On Pig Farms 
Fundamentals of B-ultrasound imaging for pigs