JP2970474B2 - Ultrasonic probe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic probe and an ultrasonic diagnostic apparatus for obtaining an ultrasonic tomographic image by scanning an ultrasonic beam from an ultrasonic transducer.

[0002]

2. Description of the Related Art Conventionally, an ultrasonic probe electrically or mechanically scans an ultrasonic transducer to obtain an ultrasonic tomographic image.

A conventional configuration of an electric scanning ultrasonic probe will be described below with reference to FIG. 3, reference numeral 1 denotes an ultrasonic probe housing, 2m to 2m + x denotes a group of plate-shaped ultrasonic transducers provided on the front side of the ultrasonic probe housing, and 3m to 3m.
+ X is a first electrode group provided on the back surface of the ultrasonic transducer group, 4m to 4m + x is a second electrode group provided on the front surface of the ultrasonic transducer group, and 5m to 5m + x is connected to the first electrode group. Lead wire groups 6m to 6m + x are lead wire groups connected to the second electrode group, and these lead wire groups 5m to 5m + x,
6 m to 6 m + x are connected to an ultrasonic diagnostic apparatus main body (not shown) via a coaxial cable 7. As shown in the above figure, the lead wire groups 5m to 5m + x and 6m to 6m + x are arranged along both inner edges of the housing 1 and are converged by the coaxial cable 7 to form a conductor loop.

[0004]

The recent circumstances surrounding the ultrasonic diagnostic apparatus include an increase in electromagnetic interference due to an improvement in reception sensitivity and a tightening of EMC comprehensive regulations in Europe.

Since the ultrasonic probe is connected to the main body of the ultrasonic diagnostic apparatus through a coaxial cable of about 2 m, the ultrasonic probe is in a floating state in terms of potential.

In the above conventional configuration, the lead wire group 5 m
When the conductor loop formed by 5m + x, 6m to 6m + x and the coaxial cable 7 crosses the external magnetic field, a noise current is induced, and the noise is superimposed on the diagnostic image. Further, there is a problem that unnecessary radiation is generated due to a magnetic field generated when a high value transmission pulse signal current flows through the lead wire groups 5m to 5m + x and 6m to 6m + x.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. An object of the present invention is to arrange a short-ring-shaped conductor in an ultrasonic probe so as to enhance the resistance to electromagnetic wave noise and suppress the generation of unnecessary radiation. The purpose is.

[0008]

In order to achieve the above object, the present invention provides an ultrasonic transducer group for transmitting and receiving ultrasonic waves in an ultrasonic probe housing, and an ultrasonic transducer group for the ultrasonic transducer group. First
A first lead wire group connected to the first electrode group, a second lead wire group connected to the second electrode group, and a coaxial cable including the first lead wire group and the second lead wire group And a short ring-shaped conductor that is in a conductor loop formed by the first lead wire group, the second lead wire group, and the coaxial cable and that includes an insulating spacer.

[0009]

According to the present invention, with the above-described configuration, noise induced by an external magnetic field crossing a conductor loop formed by a first lead wire group, a second lead wire group, and a coaxial cable is reduced, and ultrasonic diagnosis is performed. Improve the device's resistance to electromagnetic noise. Further, unnecessary radiation can be suppressed by the effect of canceling out magnetic flux based on the magnetic field generated from the conductor loop.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a structural view showing an ultrasonic probe according to an embodiment of the present invention. In FIG. 1, 1 is an ultrasonic probe housing, 2m to 2m + x is an ultrasonic transducer group, 3m to 3m
+ X is the first electrode group of the ultrasonic transducer group, 4m to 4m + x
Is the second electrode group of the ultrasonic transducer, 5m to 5m + x is the first
First lead wire group connected to the electrode group of
x is a second lead wire group connected to the second electrode group, 7 is a coaxial cable including the first lead wire group and the second lead wire group, and 8 is provided on the back surface of the first electrode group. 9 is an insulating spacer provided between the back load member and the coaxial cable, and 10 is a conductor loop formed by the first lead wire group, the second lead wire group, and the coaxial cable 7. And a short ring-shaped conductor including the insulating spacer 9. The width of the conductor 10 is at least as long as the width of the entire ultrasonic transducer group.
Rolled copper is used. Reference numeral 11 denotes an acoustic matching layer, and reference numeral 12 denotes an acoustic lens.

Next, the operation of the above embodiment will be described.
The acoustic lens 12 is applied to the subject, and the first lead wire group 5 m
To 5 m + x and the second lead wire group 6 m to 6 m + x, a driving voltage is applied to each electrode group, and the ultrasonic transducer group 2 m to 2 m
By exciting m + x, an ultrasonic wave is radiated to the subject through the acoustic matching layer 11 and the acoustic lens 12, and an ultrasonic echo signal from the subject is received, so that a tomographic image is displayed on the display of the ultrasonic diagnostic apparatus main body. Can be displayed. Then, the first lead wire group 5m to 5m + x and the second
Even if the conductor loop formed by the lead wire groups 6m to 6m + x and the coaxial cable 7 intersects with the external magnetic field, the induced noise flows through the short-ring shaped conductor 10, so that the noise appears on the diagnostic image of the ultrasonic diagnostic apparatus. The resistance to electromagnetic wave interference such as superposition can be enhanced. The above conductor 10
Has an effect of canceling a magnetic flux based on a magnetic field generated when a high-value drive current flows through the conductor loop, and thus can suppress unnecessary radiation from the ultrasonic probe.

FIG. 2 is a structural view showing an ultrasonic probe according to a second experimental example of the present invention. In FIG. 2, 1 is an ultrasonic probe housing, 2m to 2m + x are ultrasonic transducer groups, and 3m to
3m + x is the first electrode group of the ultrasonic transducer group, 4m to 4m
+ X is the second electrode group of the ultrasonic transducer group, 5m to 5m + x
Denotes a first lead wire group connected to the first electrode group,
6m + x is a second lead wire group connected to the second electrode group, 7 is a coaxial cable including the first lead wire group and the second lead wire group, and 8 is provided on the back surface of the first electrode group. 9 is an insulating spacer provided between the rear load material and the coaxial cable, and 13 is a first lead wire group and a second lead wire group.
A ladder-shaped short ring conductor that is in a conductor loop formed by the lead wire group and the coaxial cable 7 and includes the insulating spacer 9. 14 is a ladder-shaped short ring conductor with both ends and the braided wire of the coaxial cable. GN to combine
Line D. The interval between the ladders of the conductor 13 has a length at least equal to or smaller than the minimum aperture width of the group of ultrasonic transducers. In the case of this embodiment, the material is rolled copper. Reference numeral 11 denotes an acoustic matching layer, and reference numeral 12 denotes an acoustic lens.

In the present embodiment, as in the first embodiment, the ladder-like short ring conductor 13 wound around the outer periphery of the insulating spacer 9 can enhance the resistance to electromagnetic interference due to the effect of the ladder-like short ring conductor 13, and can also provide an ultrasonic probe. Unnecessary radiation from the contact can be suppressed.

[0015]

As is apparent from the above embodiment, the present invention can be used even if the conductor loop formed by the first lead group, the second lead group, and the coaxial cable crosses the external magnetic field. Flows through the short-ring-shaped conductor in the conductor loop, so that it is possible to enhance the resistance to electromagnetic wave disturbance such as superimposition of noise on a diagnostic image of the ultrasonic diagnostic apparatus. In addition, the above-described conductor has an effect of canceling out magnetic flux based on a magnetic field generated when a high-value drive current flows through a conductor loop, so that an ultrasonic probe having a feature that unnecessary radiation can be suppressed. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an ultrasonic probe according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an ultrasonic probe according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional ultrasonic probe.

[Explanation of symbols]

 1 Ultrasonic probe housing 2m-2m + x Ultrasonic transducer group 3m-3m + x First electrode group 4m-4m + x Second electrode group 5m-5m + x First lead wire group 6m-6m + x Second lead wire group REFERENCE SIGNS LIST 7 coaxial cable 8 back load material 9 insulating spacer 10 short-ring-shaped conductor 11 acoustic matching layer 12 acoustic lens 13 ladder-shaped short-ring conductor 14 GND wire

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04R 17/00 332 A61B 8/00 G01N 29/24

Claims (2)

(57) [Claims] An ultrasonic transducer group for transmitting and receiving ultrasonic waves in an ultrasonic probe housing, and a first lead wire group connected to a first electrode group of the ultrasonic transducer group. A second lead wire group connected to the second electrode group; a coaxial cable including the first lead wire group and the second lead wire group;
An ultrasonic probe, comprising: a lead group, a second ring group, and a conductor in the form of a short ring that includes an insulating spacer in a conductor loop formed by a coaxial cable. 2. A ladder-shaped short ring conductor including an insulating spacer, wherein both ends of the ladder-shaped short ring conductor are connected to a braided wire of a coaxial cable.
The described ultrasonic probe.