CN2384576Y

CN2384576Y - Short axle direction composite focusing convex transducer

Info

Publication number: CN2384576Y
Application number: CN 99227767
Authority: CN
Inventors: 卜书中; 夏鞍毅
Original assignee: Maidixun Medical Equipment Co
Current assignee: Maidixun Medical Equipment Co
Priority date: 1999-07-07
Filing date: 1999-07-07
Publication date: 2000-06-28
Anticipated expiration: 2009-07-07

Abstract

The utility model belongs to the technical field of ultrasonic diagnostic equipment, which particularly relates to a convex array transducer. The structure of the utility model is mainly composed of a back lining block (1), a piezoelectric crystal array (2), a matching layer (3), a medium layer (4), and an acoustic lens (5) from interior to exterior, wherein, the piezoelectric crystal array (2) is composed of piezoelectric crystals with radians. After sound waves emitted by the utility model are compounded and focused, ultrasonic sound beams become thinner, the pulse-echo sensitivity of the transducer becomes higher, and the resolution and the sensitivity of the ultrasonic diagnostic apparatus which adopts the utility model also become higher.

Description

The convex array transducer of short-axis direction complex focusing

This utility model belongs to the ultrasonic equipment for medical diagnosis field, is specifically related to a kind of convex array transducer.

Its transducer array element of convex array transducer is arranged along circular arc, and it is compared with linear array transducer, and identical body surface contact surface, convex array transducer can form the broader visual field in the deep, and can avoid the dead angle that bone, gas cause.Supersonic diagnostic set is launched ultrasound wave and is received echo-signal by transducer in human body, for resolving power and the sensitivity that improves complete machine, must improve the acoustic beam characteristic of transducer, usually the long axis direction at transducer adopts electron focusing to improve the acoustic beam characteristic, and adopts geometric focusing to realize at short-axis direction.Existing convex array transducer is a kind of short-axis direction employing geometric focusing--and the acoustic lens method focuses on, its principle can produce refraction when being sound wave through the different medium of the velocity of sound, the shape of acoustic lens has convex and spill, if the human body velocity of sound is greater than the acoustic lens medium velocity of sound, acoustic lens is made convex, if the human body velocity of sound is less than the acoustic lens medium velocity of sound, then acoustic lens is done concavity.Its structure of existing convex array transducer mainly is made up of backing piece, piezoelectric element battle array, matching layer and acoustic lens from the inside to the outside.

The purpose of this utility model is to provide a kind of convex array transducer, and its institute's its acoustic beam of ultrasonic waves transmitted is thinner, and the sensitivity of transducer is higher.

The purpose of this utility model is achieved in that this convex array transducer adopts complex focusing at short-axis direction, promptly not only adopt the acoustic lens method to focus on, and the another kind of employing geometric focusing--active focussing focuses on, active focussing be exactly with piezoelectric element be processed into radian as pipe shape, circular, part spherical shell shape etc., particularly watt shape.Emitting sound wave is earlier through there being the piezoelectric chip focusing of radian like this, after the transmission of matching layer and medium layer enters acoustic lens, focus on once more, acoustic beam behind this complex focusing becomes thinner, the pulse-echo sensitivity of transducer is higher, adopts its resolving power of supersonic diagnostic set and the sensitivity of this convex array transducer also higher.

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

Fig. 1 is the structural representation of convex array transducer;

Fig. 2 is the A portion enlarged drawing of Fig. 1.

In Fig. 1,2, alleged its structure of convex array transducer of this utility model mainly is made up of with acoustic lens 5 backing piece 1, piezoelectric chip battle array 2, matching layer 3, medium layer 4 from the inside to the outside, and piezoelectric chip battle array 2 wherein is to be made by the piezoelectric chip of watt shape.

Claims

1, a kind of convex array transducer, it is characterized in that its structure mainly is made up of backing piece (1), piezoelectric chip battle array (2), matching layer (3), medium layer (4) and acoustic lens (5) from the inside to the outside, piezoelectric chip battle array (2) wherein is by being made up of the piezoelectric chip of radian.

2, a kind of convex array transducer according to claim 1 is characterized in that piezoelectric chip battle array (2) wherein is to be made by the piezoelectric chip of watt shape.