SU1192786A1 - Apparatus for multi-dimensional ultrasound investigation of the interior organs - Google Patents

Description

The invention relates to medical equipment, namely, devices for determining the functional state of internal organs (heart, liver, spleen) and is intended for use in medical monitoring systems in assessing functional adaptive organ changes in operators, as well as in diagnosing their diseases.

The purpose of the invention is the elimination of errors associated with the individual anatomical and morphological features of the body, by continuous automatic assessment of the ratio of functional adaptive changes in its two zones.

FIG. 1 shows a block diagram of the proposed device; in fig. 2 and 3 are the stress diagrams at the main points of the circuit.

The device comprises a series-connected generator 1 and a transmitter converter 2, a series-connected receiver converters 3 and high-frequency amplifiers 4, the first adder 5, the first detector 6, the first low-frequency amplifier 7 and the second detector 8 connected in series, the second low-frequency amplifier 9, as well as the first integrator 10, the indicator 11 and the electrocardiograph electrodes 12 connected in series, the biopotential amplifier 13, the driver 14, the decoupling elements 15, the inputs to Which are connected to the output of the generator 1, and the outputs - to the inputs of the corresponding amplifiers 4 high frequency.

The device is multichannel, and receiving transducers 3 are placed in the projections of the first and second zones of the test body 16, and each channel contains serially connected to the output of the high frequency amplifier 4 a time selection element 17 and a block 18 for automatically compensating the signal level whose output is connected to the second input amplifier 4 high frequency, the synchronizer 19 range, the input of which is connected to the output of the generator 1, the second adder 20, the first block 21 time adjustable selection, the second integrator 22 ^ serially connected unit 23 installation of the original ratio of the signals, the element 24 comparison, the switch 25, the memory block 26, the output of which is connected to the indicator 11, the second unit

5 27 time adjustable selection, the input of which is connected to the output of the first low-frequency amplifier 7, and the output is connected through the first integrator 10 to the second input of the comparison element 24, the third input of which is connected to the output of the second integrator 22, and the second output to the input of the installation unit 23 the original ratio of signals, block 28 for-.

15 holders whose output is connected

to the second inputs of the first 10 and second 22 integrators, and the input is connected to the first output of the driver 14, the second output of which is connected to

20 to the second input of the switch 25, the output of the synchronizer 19 of the range area is connected to the second inputs of the time selection elements 17 and the second inputs of the first 21 and second 27 time adjustable selection blocks, the second outputs of the high frequency amplifiers 4 of the first zone are connected to the inputs of the first adder 5, and the second zone-to the inputs of the second adder 20.

The device works as follows (Fig. 1).

Using the generator 1 and the transmitting transducer 2, irradiation with ultrasonic waves is performed.

^{35 of the} test organ 16 (for example, the liver in its projections in VI and .V11

* intercostal spaces on the right of the sternum of the subject). Acoustic waves, reflected from the areas of the zone under investigation (zone 1 — VI intercostal space), are caught along the length of. ¹ intercostal space receiving transducers 3 of the first zone, and from sections of the reference zone (in VII intercostal space) - receiving transducers 3 of the second zone. In connected through decoupling elements 15, to the generator 1 of the amplifiers 4 high frequency is the conversion of signals. In the process of signal conversion, due to the use of well-known circuit solutions in amplifiers (for example, cascades with logarithmic conversion characteristics), the fluctuation level of reflected pulses caused by the influence of a number of destabilizing factors is reduced.

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At the times corresponding to the emission of the probe signals,

The synchronizer 19 of the range zone produces synchro pulses A (Fig. 2). These pulses, acting on the element 17 of the temporary selection of signals, cause it to trigger.

. As a result, at its first output, strobe signals W are generated, corresponding to the location of the area under study (for example, the back wall of the organ) · and arriving at the first inputs of high frequency amplifiers 4. With the help of the indicated gating pulses, at the moments of their formation, the first of the amplifier channels are brought to a working state. V. the result on the first outputs of the amplifiers 4 high frequency wasp. There is a selection of signals B, reflected from the zone under study, i.e. within the permitted range.

Simultaneously with this, at the second output of elements 1–7, gating pulses E are generated, which arrive at the second inputs of the amplifiers 4. These pulses E, for the time of their formation, lead to the second state of the amplifiers. As a result, signals B, which are reflected within the near zone of the location (signals of identity of the initial "zero" conditions, i.e., mi-) conditions, are distinguished at the second outputs of each amplifier.

₍ impairments of the influence of destabilizing factors caused by some possible non-identity of the receiving channels, installation conditions of the transducers, etc.). The levels of pulses B coming from amplifiers 4 high frequency through the elements 17 time selection on the block 18 automatic level compensation, the feedback circuits arrive at the third (controlled) inputs of the amplifiers 4, changing their modes of operation and gain, thereby minimizing the effects of destabilizing factors.

t

The signals from the outputs of the amplifiers 4 of the first (investigated) zone are fed to the inputs of the first adder 5, in which they are added. Similarly, the pulses from the outputs of amplifiers 4 of the second (control) zone are fed to the second adder 20. Relevant.

^: total signals are detected

the first 6 and second 8 detectors are amplified by the first 7 and the second 9 low frequency amplifiers, after

which is received at the first inputs of the first 10 and second 22 integrators (pulses D and D, respectively, in Fig. 2). The second inputs of integrators 10 and 22 receive signals W of the allowed range from the first output of elements 17 of the time selection of signals, pulses W bring the storage elements of integrators into a working state only during the period of their formation. As a result, the voltage at the output of the integrators 10 and 22 takes the form of 3 and And, respectively, and those 20 is an insignificant value. relations A, / A ₂ type K.

From the signal L (Fig. 3) of the electro25 cardiogram (ECG), amplified by the amplifier 13 of biopotentials with the help of the shaper 14, yn are formed. M pulses that, after passing through the delay block 28, are shifted in time and take the form of signals N. The pulses H arrive at the switching elements of the accumulative elements of the integrator 10 and 22 in accordance with the cardiac mode (formed from the teeth of the ECG K), causing the discharge of the accumulative elements at the end of each cardiac cycle and the preparation of integrators for the next cycle of accumulator. Integral values 0

40 and P levels of the total signals of the first and second zones arrive at the element 24 comparison, built, for example, according to the scheme of the standard relationship divider, the output of which is allocated

· * Voltage level Р proportional to the ratio А ^ / А ^. Before measurements using the block • 23 settings of the initial ratio of signals, the value is set.

50 equals 1. Level value

voltage P is fixed by the memory unit 26, which is connected by the switch 25. To output data to the indicator 11 in

55 strictly fixed moments of the cardiac cycle and the results of measurements for the entire cardiac cycle input

I block 27 is connected to the output ele5

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ment 24 at the end of each cardiac cycle only for a time equal to the duration of the impulses G.

The value of the ratio А ^ / А ^ is displayed by the indicator 1 1. and read by the operator-operator conducting the examination.

FIG. one

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FIG?

Claims (1)

DEVICE FOR MULTI-DIMENSIONAL ULTRASONIC RESEARCH OF THE INTERNAL ORGANS, containing a series-connected generator and. transmitting transducer, serially connected receiving transducers and high-frequency amplifiers, serially connected first adder, first detector, first low-frequency amplifier and also second serially connected second detector, second low-frequency amplifier, as well as first integrator, indicator, and serially connected electrocardiograph electrodes, amplifier biopotentials, driver, decoupling elements, the inputs of which are connected to the output of the generator, and the outputs - to the inputs of the corresponding high frequency amplifiers, characterized in that, in order to increase the reliability of the measurement results, taking into account the individual anatomical and morphological features of the organ, it is made multi-channel ,. and receiving channel converters are installed in the projections of the first and the second zone of the organ, and each channel contains successively connected with the output of the high-frequency amplifier element time selection and block automatic compensation of the signal level, the output of which is connected to the second input of the high-frequency amplifier, range synchronizer, the input of which is connected to the generator output, second adder, first block adjustable time selection, second integrator, serially connected unit for setting the initial ratio of signals, comparison element, switch, memory unit, output wired is connected to the indicator, the second block of time adjustable selection, the input of which is connected to the output of the first low-frequency amplifier, and the output is connected through the first integrator to the second input of the element, the comparison, the third input of which is connected to the output of the second integrator, and the second output to the input unit of the installation of the original ratio of signals, the delay unit, the output of which is connected to the second inputs of the first and second integrators, and the input is connected to the first output of the driver, the second output of which is connected to the second input of the comm Ator, range zone synchronizer output is connected to second inputs of the gating element and the second inputs of the first and second blocks of time-controlled selection, the second amplifier outputs a high-frequency band connected to the first inputs of the first adder and the second zone to the inputs of the second adder. SC "1192786 1192786