Veterinary Ultrasound

Overview

A veterinary ultrasound scanner builds a live cross-section of the inside of an animal from sound alone. The probe sends short pulses of high-frequency sound into the tissue and listens for the echoes that bounce back from boundaries between organs, fluid and bone. Because sound travels at a known speed, the time an echo takes to return gives its depth, and the strength of the echo gives its brightness, so a sweep of pulses across a row of elements paints a grayscale slice the vet reads in real time. It is the everyday tool for pregnancy checks, tendon injuries and abdominal exams across farm and companion animals.

The operator scans with the Transducer Probe, a hand grip holding a long Piezoelectric Element array behind an Acoustic Lens. Inside the console, the Front-End & Beamformer Board fires and listens to each element and the Image Processor Board turns the returns into a picture on the Display & Control Panel. A Battery Pack makes it field-portable, the Chassis Housing keeps it sealed against a dirty environment, and the Connector Set tie the probe and peripherals together.

Higher frequencies give sharper images but penetrate less, which is why a vet swaps probes, a high-frequency linear array for a cat's tendon, a lower-frequency convex for a cow's abdomen.

How it works

To make one scan line the Front-End & Beamformer Board tells its Transmit Pulser to excite a group of array elements, each with a slightly different delay so the wavefronts add up into a focused beam aimed into the tissue. Echoes return to the same elements; the Receive Front-End amplifies them, applies time-gain compensation to lift the faint deep echoes, and digitises every channel. The Beamformer SoC then delays and sums the channels again, this time on receive, to focus the listening beam dynamically along the line. Stepping the active group across the array sweeps the beam to build a full frame, while the matched Matching Layers and damping Backing Block keep each pulse short and efficient so depth resolution stays high.

The beamformed lines pass to the Image Processor Board, where the Image FPGA envelope-detects and log-compresses them, then scan-converts the fan of lines into a square image and writes it to the Cine Memory as part of a scrollable cine loop. That frame appears on the LCD Panel, and the operator adjusts depth, gain and modes through the Touch Digitizer and Control Key Panel.

Everything runs off the Li-ion Cell, 18650 cells in the Battery Pack under BMS Board control, and the Probe Connector in the Connector Set set lets the vet swap probes for the species and study at hand.