RU2305488C1 - Diagnostics assembly - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: diagnostics assembly has power supply, kilovolt frequency generator, computer, controller provided with analog-to-digital converter, wide-band radiating and application aerials. Application aerial is connected with microwave radiometer through coaxial cable. Microwave radiometer has command decoder connected with controller by control bus. Electromagnet feedback coupling loop is introduced into assembly, which loop connects cable and power input of kilovolt frequency generator. Application aerial, electromagnet feedback coupling loop, kilovolt frequency generator and radiating wide-band aerial are integrated in same case and are tightly fixed inside it. Assembly also has power current modulator of kilovolt frequency generator. Power current modulator is introduced into case and it connects output of power supply with power input of kilovolt frequency generator. Modulator, coaxial cable, application aerial, electromagnet feedback coupling loop, kilovolt frequency generator and radiation wide-band aerial, heat sink of modulator are integrated in united case-module by means of holder.

EFFECT: elimination of screening box; small size.

4 cl, 1 dwg

Description

The invention relates to medical equipment, namely to devices, devices, complexes for diagnosis.

Known hardware complex for the implementation of functional diagnostics [patent RU No. 2192781 "Method for functional diagnostics and hardware complex for its implementation"], containing a generator of electromagnetic radiation of the millimeter wavelength range with a tunable frequency, a radiating antenna, a receiving device made in the form of at least , one sensor-applicator with the possibility of fixing on the patient’s body, and connected to the radiometer of the long-wave part of the microwave range, as well as containing elements for placing, securing and / or moving sensors on the patient’s body, located inside the noise-resistant capsule, while the sensors are connected to the software module. The millimeter wave electromagnetic radiation source is rigidly fixed to the inner wall of the capsule body so that the distance between the radiation source and the patient is 20-40 cm, and the projections of the patient's internal organs are exposed to electromagnetic radiation. The receiving device is made of at least two sensor applicators, each of which is connected to a multi-channel non-frequency-adjustable radiometer or to a single-channel non-frequency-adjustable radiometer via a switching device.

Also known as "Apparatus for diagnosis and multifactorial physiotherapy" [patent RU No. 2167686]. The apparatus contains a base unit consisting of a main infrared IR terminal and a control panel interconnected, an additional IR terminal, N (where N≥1) additional laser terminals configured to irradiate and receive reflected radiation for different frequencies of the optical range, EHF range terminal, ultrasonic terminal, elements for express diagnostics. The indicated terminals and elements of express diagnostics are connected to the control panel through the corresponding connector and are configured to perform scheduled and express diagnostics, affect biological objects simultaneously or sequentially in time, obtain information on the display of a personal computer and compare information about the patient’s condition before and upon completion of the physiotherapeutic effect.

Also known apparatus for influencing biological objects by an electromagnetic field in the EHF frequency range [patent RU 2032430]. This device contains n sources fixed by the frequency of electromagnetic radiation, with the ability to work in pulsed and continuous modes, each of n sources is configured to change the spatial position depending on the mode of operation and is equipped with pin attenuators to control the output power when switching from EHF mode diagnostics to the regime of EHF-therapy and vice versa, with 2 <n <5, and the fixed frequencies of electromagnetic radiation sources are shifted one relative to another in frequency by 8-20%.

The known apparatus allows you to combine the preliminary diagnostic mode with the therapeutic effect by adjusting the output signal power depending on the mode. This unit operates both in continuous and in pulsed mode.

However, the apparatus for influencing biological objects with an electromagnetic field in the EHF frequency range is quite complicated and requires high professionalism in choosing one or another working frequency of exposure after studying the body in the diagnostic mode.

Closest to the claimed device is an "Analytical device for the study of biological objects" [patent RU No. 24794 of 03/06/2002, authors Petrosyan VI, Vlaskina SV, Sokolova V.G. and etc.]. It includes an emitter of electromagnetic waves in the form of an EHF generator and an antenna, an receiver of an electromagnetic signal in the form of a microwave radiometer with an applicator antenna, a power supply for the analyzing device, a control panel containing a controller, an analog-to-digital converter (ADC), a keyboard, and an audio unit alarms, light-signaling unit, power supply for the control panel, command bus, computers and a programmable power source connected to an emitter of electromagnetic waves. The command bus connects the controller to a programmable power supply. The computer is connected to the controller, the microwave radiometer is connected to the ADC. All elements of the analytical device, except for computers, are placed in a shielding box. The analytical device additionally has a decoder inserted into the microwave radiometer and connected to the controller by a command bus.

However, this analytical device can also ensure normal operation only if the analytical device is placed in a special box.

The task of the invention is to reduce the size of the complex by eliminating boxing while providing stable removable reliable parameters.

The essence of the invention lies in the fact that the diagnostic complex containing a power source, an EHF generator with a radiating broadband antenna, a computer, a controller with an analog-to-digital converter, an electromagnetic signal receiver containing an applicator type receiving antenna connected by a coaxial feeder to a microwave radiometer, including a decoder for controlling the gain and time constant of signal accumulation connected to the controller by the control bus, the analog output of the microwave radiometer being connected connected to the input of the analog-to-digital converter of the controller, which is connected through a data line in serial code to a computer that has an operating system for analyzing the measured signal and comparing it with samples from the reference library, has an electromagnetic feedback loop connecting the coaxial feeder and the EHF power input -generator, moreover, the applicator antenna, the electromagnetic feedback loop, the EHF generator and the radiating broadband antenna are combined into a single module housing and are rigidly connected in it.

In addition, the diagnostic complex has a modulator of the current supply of the EHF generator, also introduced into the module housing and connecting the output of the power source to the power input of the EHF generator.

A diagnostic complex is also claimed in which the electromagnetic coupling loop, modulator and other elements listed in the above-mentioned features, combined in a single module housing, are rigidly connected in it by means of a holder in the form of a heat sink.

In addition, a horn antenna is used as the radiating broadband antenna.

A diagnostic complex is also claimed in which the electromagnetic feedback loop is made in the form of an open wire jumper, which is connected at one end to the input of the EHF generator, and the other end is completed with an open loop rigidly wound over the dielectric sheath of the feeder.

The technical result of the claimed invention is the exclusion of the shielding box from the design of the complex and, therefore, the solution to the problem of miniaturization of the device. This became possible due to a significant increase, about 1000 times, in the level of the useful signal at the input of the microwave radiometer, which led to an increase in the signal-to-noise ratio to the desired level and allowed us to neglect the effect of external electromagnetic interference. This became achievable in connection with the introduction of a feedback loop, modulator, and joint arrangement of a number of the listed receiving-emitting elements into a single module housing, where they are geometrically and mechanically rigidly connected in it.

Another technical result of the claimed complex is to increase the stability of the recorded parameters of the patient, regardless of external conditions.

The inventive diagnostic complex is illustrated using the drawing, where the numbers indicate:

1 - computer

2 - microwave radiometer,

3 - command decoder,

4 - applicator antenna,

5 - coaxial feeder,

6 - analog-to-digital Converter (ADC),

7 - controller

8 - broadband radiating antenna,

9 - EHF generator,

10 - modulator of the current supply of the EHF generator,

11 - feedback loop;

12 - control bus;

13 - power source;

14 - module housing.

The inventive complex consists of a computer 1, a microwave radiometer - 2 with a command decoder 3, the input of which is connected to the applicator antenna 4 using a coaxial feeder 5, and the analog output of a microwave radiometer 2 is connected to the input of an analog-to-digital converter - ADC 6 of controller 7, which is connected through a data line in serial code to a computer 1, a broadband emitting antenna 8 connected to the output of the EHF generator 9, the power input of which is connected to the output of the modulator 10 of the power source 13, the output of which is connected to the input of the modulator 10, feedback loops 11 connecting the coaxial feeder 5 and the output of the modulator 10. The applicator antenna 4, the electromagnetic feedback loop 11, the EHF generator 9, and the broadband emitting antenna 8 are combined into a single module housing 14 and are rigidly connected in it.

Unlike the modulator included in the microwave radiometer 2, the modulator 10 provides a change in the power mode of the active element of the EHF generator 9, leading to the enrichment of the spectral composition of the output signal of the EHF generator. The control outputs of the controller 7 are connected to the control bus 12, which serves to transmit control commands to the command decoder 3, which is part of the microwave radiometer 2. The control bus 12 connects the inputs of the command decoder 3 and the output of the controller 7. Computer 1 is connected to the controller 7 by a line containing four twisted pairs located in a common shielding for transmitting data in serial code. In the claimed diagnostic complex, the controlled elements are: microwave radiometer 2, controller 7. The sensitivity of the diagnostic complex is determined by the sensitivity of the microwave radiometer 2 and the design of the applicator antenna 4 and a sensitivity level of at least 10-15 W is reached in the prototype. The decoder commands 3 is designed to control parameters of the microwave radiometer 2, such as gain and signal accumulation time. The applicator antenna 4 and the input circuit of the microwave radiometer 2 are designed for the range of received frequencies from 985 to 1015 MHz. The principles of construction of modulation type microwave radiometers described in the literature apply to this sample of microwave radiometer 2.

The inventive diagnostic complex operates as follows. Work begins with a connection to the mains, after which all the blocks reach their working state in about 20 minutes. Using a computer 1 carry out the selection of the operating mode from the set of available for the problem being solved. From the output of the power source 13, a stabilized voltage of the order of 20 V is supplied to a modulator 10, from the output of which the modulated supply voltage is supplied to an EHF generator 9. The frequency spectrum radiated by the EHF generator is fed to a horn type broadband emitting antenna 8, which is directed to the region selected for research body of the examined patient. The microwave response induced in the body - the water-containing object is received by the applicator antenna 4 connected to the broadband horn antenna 8. The signal from the output of the applicator antenna 4 through the coaxial feeder 5 is fed to the input of the microwave radiometer 2 for further processing. In addition, the coaxial feeder 5 is connected to the power input of the EHF generator using feedback loop 11. It is, for example, an open wire jumper, which is connected at one end to the power input of the EHF generator, and the other end ends with one or two turns rigidly wound on top of the dielectric sheath of the feeder.

The modulator 10 included in the circuit of the inventive device is intended to modulate the supply current of the active element of the EHF generator, for example, an avalanche-span diode.

The signal at the input of the microwave radiometer 2 is converted to a constant voltage proportional to the power of the received signal, which carries information about the intensity of the biochemical process of the test tissue located in the studied area of the patient’s body. The signal is fed to the input of the ADC 6, which is part of the controller 7, where it is converted to digital form and stored, after which the controller 7 transfers the received information to the computer memory area for further processing. The standard computer display shows information about the end of the measurement process.

The above demonstrates the purpose of each of the nodes included in the inventive diagnostic complex.

Depending on the specific medical task, the operator performs certain actions and receives information about the physiological state of the body.

Claims (5)

1. Diagnostic complex containing a power source, an EHF generator with a radiating broadband antenna, a computer, a controller with an analog-to-digital converter, an electromagnetic signal receiver containing an applicator type receiving antenna connected by a coaxial feeder to a microwave radiometer, including a gain control command decoder and the signal accumulation time constant connected to the controller by the control bus, the analog output of the radiometer is connected to the input of the analog-to-digital converter ller, which is connected through a data line in serial code to a computer having an operating system for analyzing the measured signal and comparing it with samples from the library of standards, characterized in that it has an electromagnetic feedback loop connecting the coaxial feeder and the power input of the EHF generator moreover, the applicator antenna, the electromagnetic feedback loop, the EHF generator and the radiating broadband antenna are combined into a single module housing and are rigidly connected in it. 2. The diagnostic complex according to claim 1, characterized in that it has a modulator of the power supply current of the EHF generator, introduced into the module housing and connecting the output of the power source to the power input of the EHF generator. 3. The diagnostic complex according to claim 1, characterized in that the modulator, coaxial feeder, applicator antenna, electromagnetic feedback loop, EHF generator and radiating broadband antenna are combined in a single module housing and are rigidly connected to it by a holder in the form of a heat sink. 4. The diagnostic complex according to claim 1, characterized in that a horn antenna is used as the radiating broadband antenna. 5. The diagnostic complex according to claim 1, characterized in that the electromagnetic feedback loop is made in the form of an open wire jumper, which is connected at one end to the input of the EHF generator, and the other end is completed with an open loop rigidly wound over the dielectric sheath of the feeder.