CN210774334U

CN210774334U - On-site detection device for medical focusing transducer

Info

Publication number: CN210774334U
Application number: CN201921928748.2U
Authority: CN
Inventors: 于龙晶; 郑慧峰; 郭成成; 曹永刚; 王月兵
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-06-16
Anticipated expiration: 2029-11-11

Abstract

The utility model relates to a field detection device of medical focus transducer. The utility model discloses a host computer control system, mechanical running gear, scanning receiving arrangement, data acquisition device, take sound absorbing material's water tank. The control system comprises a 4-axis motion control card and a linear motor, and is connected to the computer through the Ethernet; the mechanical walking mechanism consists of three-degree-of-freedom linear modules; the scanning receiving device mainly comprises a hydrophone; during measurement, the medical transducer emits high-intensity focused sound waves, and the hydrophones in the water bag receive sound wave information near the focus along with the travelling mechanism. The data acquisition device is completed by an acquisition card and transmits acquired data to the computer through the Ethernet. The utility model discloses can realize not only having improved the treatment precision and the security performance of medical high strength focusing transducer to the detection of medical high strength focusing transducer sound field, the portability of device has still improved detection efficiency.

Description

On-site detection device for medical focusing transducer

Technical Field

The utility model relates to a field detection device of medical focus transducer.

Background

Today, ultrasonic diagnostic equipment is rapidly developed, ultrasonic sound power measurement calibration is always a hot problem for study of scholars, and if the dosage of ultrasonic sound power is different from a preset value, normal cells around a tumor are damaged, so that complications are caused; or the treatment is not in place, and the disease condition of the patient is repeated, so that the diagnosis and treatment accuracy and timeliness are seriously influenced. The sound field characteristics and the measurement difficulty of the high-intensity focused ultrasound HIFU determine that the measurement of the sound power is greatly limited, the sound power measurement at the present stage is stopped at the stage of a large-scale laboratory for inspection, the timeliness of diagnosis and treatment is greatly reduced, and the transportation route may physically damage the treatment probe to influence the treatment application.

The existing acoustic power measuring method can not meet the requirement of field measurement detection, the near-field measuring method belongs to near-field acoustic holography, and is an important sound source positioning and sound field visualization technology established on the basis of an acoustic radiation theory, namely an acoustic wave generation and propagation theory. The method lays a theoretical foundation for a portable ultrasonic field calibration system.

Disclosure of Invention

The utility model discloses it is not enough to prior art, provide a field detection device of medical focus transducer.

The utility model provides a technical scheme that technical problem took does:

the focusing sound field of the high-intensity focusing ultrasound has the characteristics of high temperature and the like, and is difficult to directly measure, so that the novel high-intensity focusing ultrasound detection device utilizes a near-field measurement method to measure the vicinity of the focusing domain, calculates information such as the sound field intensity of the focusing domain and the like by a cross-spectrum method, avoids the defect of directly measuring the sound pressure at the focusing domain, and avoids irreversible damage to the measuring hydrophone.

In order to obtain more accurate sound field detection information, a three-dimensional sound field is scanned in a uniform step length, and certain errors are caused manually, so that motors are used in three directions, the walking of the motors is controlled by a single chip microcomputer program, the walking in the uniform step length in each direction is guaranteed, and the sound field information near a focusing area can be accurately reflected by the obtained data through subsequent processing.

For data acquisition of HIFU sound field characteristics, GB/T19890-2005 acoustic High Intensity Focused Ultrasound (HIFU) sound power and sound field characteristics measurement has special requirements for data acquisition card selection. In the data acquisition process, because voltage signals received by the hydrophone are very small, the voltage signals need to be filtered, amplified and the like, and then the electric signals are converted into analog signals through the A/D conversion module and then input into a computer.

The basic principle of the utility model is as follows: the existing acoustic power measuring method can not meet the requirement of field measurement detection, the near-field measuring method belongs to near-field acoustic holography, and is an important sound source positioning and sound field visualization technology established on the basis of an acoustic radiation theory, namely an acoustic wave generation and propagation theory. The method lays a theoretical foundation for a portable ultrasonic field calibration system.

The beneficial effects of the utility model reside in that: aiming at the HIFU focused ultrasound scalpel, the portable field acoustic power metering device is designed according to the characteristics of the medical instrument, and the field detection of a diagnosis and treatment field is realized. The situation of calibration in a large-scale laboratory for inspection is broken through, and theoretical and experimental foundations can be provided for subsequent on-site measurement and detection. The method is beneficial to establishing a quantity value tracing and transmitting system of medical ultrasonic equipment in China, further perfects the metering and verification standards of relevant equipment, and can better ensure that the medical equipment is safely and effectively used. The ultrasonic diagnosis and treatment instrument provides measurement and test guarantee for further development of ultrasonic treatment equipment in China and entrance to the international market, and has great social benefit.

Drawings

Fig. 1 is an overall three-dimensional view of the present device.

Fig. 2 is a three-dimensional view of a walking measurement system.

FIG. 3 is a side view of a walk measurement system.

Fig. 4 is an electronic control system.

FIG. 5 is a hardware design flow diagram.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a host computer control system 1, mechanical running gear 2, scanning receiving arrangement 3, data acquisition device 4, take sound absorbing material's water tank 5. The control system comprises a 4-axis motion control card and a linear motor, and is connected with a computer through an Ethernet; the running gear scanning system of the measuring device: the three-freedom-degree linear module is composed of three-freedom-degree linear modules, and each module is controlled by a motor and controlled by three-axis electric control. The acquisition device is completed by an acquisition card and transmits data through the Ethernet. The electric control system comprises a motor, a motor driver, a single chip microcomputer control module, an interface program, a limiting sensor, a data acquisition module and other electrical elements, can program a control device to automatically complete detection actions according to user requirements, output a data report, communicate with a computer, facilitate control and data acquisition, and can be perfected and upgraded subsequently according to use conditions.

The measuring object is a focused ultrasound tumor treatment system, a portable small water tank structure is placed above the medical HIFU treatment instrument, the platform structure is erected on the detected surface of the HIFU transducer, the lower part of the water tank is used as a soft connection part with a customized silica gel water bag, the motion space of the detection head can be ensured, and the bottom of the water tank can be seamlessly attached to the detected surface. The four columns are supported by plate materials, and the table top is made of 2 cm-thick acrylic glass. A round hole with the diameter of 30cm is arranged in the middle of the table top, a cylindrical water tank is stuck on the round hole, the diameter of the round hole is 30cm, the thickness of the round hole is 1cm, a water bag is fixed at the lower end of the water tank, the opening size of the water bag is 30cm, and the round hole is fixed at the lower end of the water tank through a sealing ring. Be fixed with two-dimentional slip table module on the ya keli mesa, can biax motion, make things convenient for follow-up sound field scanning. A vertical direction shaft is arranged perpendicular to the table top, and the motion in the vertical direction can be controlled through a motor, so that the scanning of a three-dimensional space is finally realized. And the upper end of the vertical shaft is fixed with a clamp structure for fixing the hydrophone.

The specific operation method comprises the following steps: firstly, the detection device is stably arranged on the medical focused ultrasound detection device, so that the contact surface is tightly attached. The medical focusing transducer which faces upwards emits sound waves upwards, and the sound waves are transmitted into the water bag of the detection device through the coupling effect of the two water bag devices. The device for receiving sound waves in the water bag is fixed on a mechanical travelling mechanism and is electrically controlled by three shafts, stepping motors of linear modules in three directions are given by a single chip microcomputer program and can move in a three-dimensional space, so that the receiving device can receive data in the three-dimensional space along with the movement of the travelling mechanism, the received three-dimensional sound field data can be collected by a data collection card with 8-bit resolution, special requirements are placed on the selection of the data collection card due to the measurement of sound power and sound field characteristics of High Intensity Focused Ultrasound (HIFU), and the voltage signals received by a hydrophone are very small in the data collection process, so that the processing such as filtering amplification is needed, and then the electric signals are converted into analog signals through an Ethernet through an A/D conversion module and then are input into a computer.

Claims

1. The utility model provides a field detection device of medical focus transducer, includes upper computer control system, mechanical running gear, scanning receiving arrangement, data acquisition device, takes sound absorbing material's water tank, its characterized in that: the control system consisting of a 4-axis motion control card and a linear motor is connected to a computer through an Ethernet, and the computer sends an instruction to control the scanning motion of the data acquisition device and the mechanical travelling mechanism; the mechanical walking mechanism consists of linear modules with three degrees of freedom, wherein each module is controlled by a motor, so that the mechanical device has three-axis electric control; the upper end of the scanning receiving device is fixed on the travelling mechanism, the three-axis scanning receiving device mainly comprises a hydrophone, and three-dimensional sound field data received by the hydrophone can be collected by a data acquisition card with 8-bit resolution and transmitted to a computer through Ethernet; the data receiving of the hydrophone is completed in a box with a water bag, and sound absorption materials are attached to the periphery of the box body.