ULTRASONIC PROBE Russian patent published in 2011 - IPC A61B8/00 G01N29/24 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to ultrasonic probes for alive body diagnostics. Ultrasonic probe, in the first version of implementation, contains multitude of piezoelectric elements and acoustic matching layer, on one surface of the multitude of piezoelectric elements, which is formed from elastic India rubber material. Sound velocity in acoustic matching layer is lower or equals 1650 m/s, and acoustic impedance of elastic India rubber material is lower than acoustic impedance of piezoelectric elements, but higher than acoustic impedance of the object. In the second version, additionally, acoustic matching layer includes, at least, three acoustic matching layers, each of which is located from one side of multitude of piezoelectric elements. The third acoustic matching layer has acoustic impedance within from 1.8 to 2.2 MRayl and sound velocity equal 1650 m/s or lower, and the first and the second acoustic matching layers are located between the third acoustic matching layer and the multitude of piezoelectric elements. In the third version, the second and the third acoustic matching layers are located on one surface of the multitude of piezoelectric elements and also have the velocity of sound in the layer equal 1650 m/s or lower. The first acoustic matching layer is located between the second and the third acoustic matching layers and the multitude of piezoelectric elements. In the fourth version of implementation the fourth acoustic matching layer is located from the side of one surface of the multitude of piezoelectric elements and has velocity of sound equal 1650 m/s, and the first, second and third acoustic matching layers are located between the fourth acoustic matching layer and the multitude of piezoelectric elements. In the fifth version probe has a load-bearing element in form of padding, and the multitude of piezoelectric elements are arranged on the upper surface of the load-bearing element in form of padding. In addition, the first polymer film is located between the load-bearing element and the multitude of piezoelectric elements and is provided with electric leads, matching the corresponding piezoelectric elements. The first acoustic matching layer is arranged in such a way as to match the corresponding piezoelectric elements. In addition, on the upper surface of the first acoustic matching layer there is the second polymer film and the second acoustic matching layer on its upper surface. The third acoustic matching layer is made on the upper surface of the second acoustic matching layer and is formed from elastic India rubber material, with sound velocity in it lower or equal 1650 m/s. In the sixth version of implementation, at least, piezoelectric elements, the first acoustic layer and the second polymer film are separated many times.

EFFECT: application of the invention makes it possible to obtain ultrasonic images with high resolution.

17 cl, 12 dwg