Field of View (FOV), (degree)
Higher operating frequency, MHz
Lower operating frequency, MHz
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Linear sensors are designed for surface research and operate at a high frequency: from three to fifteen megahertz. The piezoelectric crystals are installed in a line and alternately emit an ultrasonic beam, while the scanning depth does not exceed eleven centimeters. The device provides a rectangular field of view with high resolution, so that the screen displays a high-quality detailed image. Sensors of this type are used for examining superficially located organs and structures: muscles, mammary glands, thyroid glands, joints and ligaments, vessels. During scanning, the image around the edges is distorted, which causes certain difficulties in the process of work and requires the doctor to do the trick. When choosing a device, you should pay attention to the length of its aperture: it is responsible for the width of the visualized area.
The linear sensor consists of three parts: a scanning head, a connector and a cable. In order not to make mistakes when choosing a device, it is worthwhile to study the state of the head parts: acoustic lens and matching layers, piezocrystals, damper, clutch and body. Acoustic lens is responsible for the formation of ultrasound. It is made with a special, durable and waterproof plastic, on which the lubricant is applied. If there are scratches, cracks, chips or opacities on its surface, it is better to refuse the purchase of the device. For generation and emission of ultrasound, piezocrystals, which are assembled into a single matrix, are responsible. The presence of broken or burnt out elements promises the loss of electrical energy necessary to generate high-frequency sound, and as a result - the deterioration of the quality of the picture on the screen. The damper is made of a hard, wear-resistant material. Its function: vibration damping. Thanks to it, the resolving power of the sensor increases. The body plays an important role: it protects the matrix from damage. In turn, the rubber clutch does not allow the cable to break at the base of the device. Any defects found on the plastic surface of the device may interfere with a qualitative ultrasound. On the other hand, the replacement of components allows to restore the correct operation of the sensor.
A wide range of new and used ultrasonic equipment has been collected on the BiMedis website. Equipment is sold by official representatives of manufacturers and independent sellers, regardless of the location of the goods. Advertisements for sale can accommodate anyone. The number of publications is unlimited. To find the suitable model of the linear sensor, use the built-in search: specify the type of device, manufacturer, year of manufacture, condition, suitable price range. The system will automatically select the acceptable options.