CN101919710A

CN101919710A - Medical Ultrasound Imager

Info

Publication number: CN101919710A
Application number: CN 201010285217
Authority: CN
Inventors: 马建国; 刘立; 王建; 王天慧
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2010-12-22

Abstract

The invention belongs to the technical field of biomedical engineering and signal processing, and relates to a medical ultrasonic imager, which includes an ultrasonic probe, a control conditioning circuit and a host. The ultrasonic probe includes a shell and a soft inner wall, and a coupling agent is distributed between the shell and the inner wall. The bracket fixed on the shell has multiple sets of ultrasonic transducers installed on the bracket, each set of ultrasonic transducers is installed on a vertical plane of the central axis of the probe, and its emission or reception direction points to the central axis, forming a three-dimensional ultrasonic The transducer array realizes two-dimensional imaging and three-dimensional imaging of different sections through the combination of different ultrasonic transducers transmitting or receiving ultrasonic signals. The ultrasonic instrument of the invention can realize the three-dimensional imaging of the limbs and neck of the human body, and improve the accuracy and efficiency of medical diagnosis.

Description

Medical ultrasonic imaging device

Technical field

The invention belongs to biomedical engineering, signal processing technology field, relate to a kind of ultrasonic imaging device.

Background technology

Medical supersonic equipment is by the probe emission and accept the ultrasonic work of carrying out.The ultrasonic penetration tissue of emission reflects between different medium, and reflection or projection ultrasonic signal by analysis receives can obtain the tissue internal information.Modern ultrasonic device commonly used, the array that usually adopts a plurality of ultrasonic transducers to constitute as the probe of B ultrasonic is to realize focusing and the imaging to the particular organization position.

According to the difference of using, typical ultrasonic probe comprises array linear array, two-dimensional array and ring battle array.By combination, realize focusing on and to surveying the scanning at position, thereby improved precision and the efficient surveyed wherein ultrasonic transducer.

But the three-dimensional live body of human body right and wrong rule comprises the steric information of different depth, and is in the nonstatic state.Existing diasonograph based on linear array or face battle array needs repeatedly imaging could obtain more complete information.But because the motion of human body and interior tissue, existing medical supersonic instrument can't be realized the real time stereoscopic imaging to human body.Existing 3D medical ultrasonic instrument mainly is based on the two dimension of phased array or curved surface probe in certain the local implementation three-dimensional imaging to tissue of certain specific sensing point or direction.For the tissue with stereochemical structure, as extremity and even trunk, existing 3D medical ultrasonic instrument can not be realized real-time complete structure detection.

Summary of the invention

The objective of the invention is,, improve sonde configuration, propose a kind of medical ultrasonic imaging device with stereochemical structure at shortcoming based on present supersonic array medical examination device.Technical scheme of the present invention is as follows:

A kind of medical ultrasonic imaging device, comprise ultrasonic probe, control modulate circuit and main frame, it is characterized in that, described ultrasonic probe comprises shell, soft inwall, between shell and inwall, be distributed with couplant, be fixed on the support on the shell, many group ultrasonic transducers are installed on support, every group of ultrasonic transducer is installed on the vertical of probe axis, its emission or receive direction point to the axis, form a three-dimensional ultrasound transducer array, one or more not on the same group the ultrasonic transducers of main frame gating apply pumping signal and make its emission ultrasonic, and the ultrasonic signal that receives of other part or all of ultrasonic transducers of acquisition time, by different ultrasonic transducer emissions or the combination between the reception ultrasonic signal, realize different section two-dimensional imaging and three-dimensional imaging.

Medical ultrasonic imaging device of the present invention, ultrasound transducer array can be cylindrical array, is made up of the many groups of ring-type ultrasonic transducer groups that distribute along the probe axis.

The present invention can be used for realizing to the human body certain organs, such as (but being not limited to) extremity, cervical region, and the three-dimensional imaging of stereochemical structure, and handle by time domain and to combine realization human body organ three-dimensional doppler image sequence with Doppler's mode.Can realize three-dimensional imaging based on Ultrasound Instrument of the present invention to human limb and cervical region, the information that provides present equipment to defy capture, as one constantly the organ transient images or the limb blood liquid stream to time-varying sequence image etc., thereby improve the accuracy and the efficient of medical diagnosis.

Description of drawings

The structured flowchart of Fig. 1 medical ultrasonic imaging device of the present invention.

The overall structure sketch map of the ultrasonic probe that Fig. 2 the present invention adopts.

The ring-type ultrasound transducer array that Fig. 3 the present invention adopts is at the ring section at one group of ultrasonic transducer place.

Description of drawings is as follows:

2 one groups of ring-type ultrasonic transducer 3 hard shells in 1 ultrasonic transducer unit

4 deformable soft inwall 5 supports 6 couplants

7 conduits

The specific embodiment

Below in conjunction with drawings and Examples medical ultrasonic imaging device of the present invention is described further.

Referring to Fig. 1, medical ultrasonic imaging device of the present invention comprises mainly comprising ultrasonic probe, signal condition unit, pumping signal generating unit, control unit, main frame several sections.One or more not on the same group the ultrasonic transducer emission ultrasonic signals of host computer using control unit gating main frame gating, other probe of gating receives ultrasonic signal, the control signal that main frame produces converts the ultrasonic action signal to through the pumping signal generating unit, this signal is loaded on the ultrasonic probe by the control unit gating, main frame is admitted to main frame again by other probes of control unit timesharing gating after the unitary conditioning of the induced ultrasonic signal process signal condition of the probe of gating institute.Signal condition unit wherein, pumping signal generating unit, three unit of control unit are collectively referred to as the control modulate circuit in the present invention.

Digital processing, ultra sonic imaging that main frame is finished ultrasonic signal show that functions such as man-machine interaction realize two-dimensional cross-section imaging, three-dimensional imaging and visual.Man-machine interface comprises input equipment such as keyboard and mouse, and output is as printer, display etc.

Ultrasonic probe is core of the present invention as shown in Figures 2 and 3.The probe of present embodiment is the tubular structure of sealing, and two ends are run through, and during inspection, tissue to be measured is contained in the probe.Probe comprises major parts such as flexible inner shell, couplant in hard shell, ultrasound transducer array, the deformable.

Probing shell 3 adopts the hard shell that can play a protective role.Be connected with conduit 7 on the case body 3, be used for injecting or discharging couplant 8.The probe inner ring surface is deformable soft inwall 4, and the expansion by the couplant capacity regulating inner shell between control shell and the inwall in the operation is shunk.The inner couplant container of probe is further divided into a plurality of chambeies, by the adjusting to the different parts chamber, realizes that the tight of irregularly shaped tissue of popping one's head in to be measured contacts.

Ultrasound transducer array is installed on the fixed support 5 of shell 3 inside, and relative position is fixed, so that the difficulty of reduction system location and imaging.On fixed support 5, a plurality of ultrasonic transducers unit 1 is installed, forms a three-dimensional supersonic array face with the certain space geometric ways.A kind of easy mounting means is as follows: ultrasound transducer array is installed in the vertical of probe axis, its emission receive direction points to the axis, ultrasound transducer array is by many groups of ring-type ultrasonic transducer group 2 (the three-dimensional transducing ultrasound transducer arrays that Fig. 2 has drawn and has been made of 4 groups of ring-type ultrasonic transducer groups along probe axis annular spread, in the empty frame is one group of ring-type ultrasonic transducer group) form, the whole ultrasonic transducer array also distributes along the axis, forms cylindrical array.The simplest a kind of situation is that it is identical that each organizes the projection of ultrasound transducer array on the vertical of axis.Ultrasound transducer array is surrounded on and is full of in proximate liquid of acoustic characteristic water or the colloid couplant, does not directly contact with tissue.Equally, the soft interface of probe inner shell also adopts soft materials such as the rubber of similar acoustic characteristic or plastics to constitute.Probing shell is connected with the couplant transmission pipeline and is connected to the outside, realizes the increase and decrease of couplant.

The installation of ultrasonic transducer of the present invention is not limited to aforesaid way, also can take other modes according to concrete application, and as the ultrasonic transducer density difference of different parts, or the relative angle of different rings group staggers etc.

The probe shape is not limited to cylindrical, also can be the three-dimensional shape of square or other realistic application.According to different application, but the designed size probe different with diameter.

Ultrasonic imaging device of the present invention has the structure probe of sealing and axis perforation, can be from a plurality of directions and diverse location around inspected object such as the extremity simultaneously to object detection, realization to the real-time three-dimensional scanner uni of human body stereo tissue to the human body certain organs, as the real-time detection of blood vessel.

Claims

1. A medical ultrasonic imager, comprising an ultrasonic probe, a control conditioning circuit and a main frame, characterized in that, the ultrasonic probe comprises a shell, a soft inner wall, and a couplant is distributed between the shell and the inner wall, and is fixed on the shell There are multiple groups of ultrasonic transducers installed on the bracket, each group of ultrasonic transducers is installed on a vertical plane of the central axis of the probe, and its transmitting or receiving direction points to the central axis, forming a three-dimensional ultrasonic transducer array, The host selects one or more ultrasonic transducers of different groups, applies an excitation signal to make it emit ultrasonic waves, and collects ultrasonic signals received by other part or all of the ultrasonic transducers in time division, and transmits or transmits ultrasonic signals through different ultrasonic transducers. Receive the combination of ultrasonic signals to realize two-dimensional imaging and three-dimensional imaging of different sections.

2 . The medical ultrasonic imager according to claim 1 , wherein the ultrasonic transducer array is a cylindrical array consisting of multiple ring-shaped ultrasonic transducer groups distributed along the central axis of the probe. 3 .