SU410776A1 - - Google Patents

Description

one

The invention relates to medical technology, namely to ultrasound diagnostic aniarata.

A known ultrasonic diagnostic apparatus, comprising a sensor in an intermediate liquid medium, an electronic unit, a sensor displacement unit, a scanner with an electron beam memory tube.

However, the fulfillment of a carriage unit in the form of a carriage performing reciprocating motion causes turbulent motion in the fluid, which leads to an increase in noise at the input of the receiver and to a decrease in the resolution and accuracy of the diagnosis.

In order to improve the accuracy of diagnosis. By reducing the noise in the present Annarate, the sensor displacement unit is made in the form of a rotating rod with guides FOR moving the sensor, perpendicular to the axis of the axis. In addition, the scanner is made in the form of an electrically interconnected rotating transformer, a potentiometer, kinematically connected to a sensor, an alternating voltage generator, an isolating transformer, and two phase detectors.

FIG. 1 shows a block diagram of the proposed ultrasound diagnostic apparatus; in fig. 2 - kinematic scheme

an unblocking unit; in fig. 3 - schematic diagram of the scanner.

The ultrasonic diagnostic apparatus contains a sensor 1 placed in an intermediate fluid, such as water, a sensor displacement unit 2, made in the form of a rotating rod 3 with guides 4 for moving the sensor, reinforced perpendicular to the axis of the rod, scanning unit 5,

made in the form of electrically coupled rotating transformer 6, potentiometer 7, alternating voltage generator 8, isolation transformer 9 and two phase detectors 10 and 11,

an electronic unit 12 and a cathode-ray tube 13. The electronic unit 12 is made in the form of an electrically connected amplifier 14, a pulse generator 15, a delay node 16, a standby generator 17, a gate cascade 18, and a signal generation stage 19.

Ultrasonic diagnostic apparatus operates as follows. When you turn on the device shtanga 3 together

with guides 4, counterweights 20 n sensor 1 is inserted into the rampage of the help of electric motor 21. Simultaneously with the lie, the sensor and counterweights move along the guides in mutually opposite

directions, resulting in

scanned by removing the sensor’s point of focus of the entire plane of a selected section of the tissues under investigation, which lies at a predetermined depth from the surface. Vran1, the displacement and linear movement of the sensor with a rotary transformer 6 and potentiometer 7, which are kinematically associated with the movement of the sensor, perform a sweep on the screen of the cathode ray tube 13.

The electrical circuit of the scanner (see Fig. 3) works as follows.

The reference voltages for the detectors 10 and 11 are supplied from two separate windings of the isolation transformer, and the input voltages of the detectors are removed from the two separate windings of the rotating transformer 6, which are shifted relative to each other by an angle of 90 °. When the voltage of the alternating voltage generator 8 is immeasurable, the position of a point on the screen of the cathode ray tube 13 caused by the voltage supplied on the pair of flap plates depends on the position of the loss of the transformer 6 and the rotating transformer 6. In the pulse generator (1 15 electronic unit 12 are formed impulses that produce shock excitation of sensor 1. Ultrasonic vibrations excited by the sensor are sent to the test tissue through any intermediate medium (for example, water). Echo signals reflected from internal The structures of the investigated tissues are captured by the sensor, converted into electrical oscillations, then fed to the amplifier 14 through the sliding contacts 22 and through the strobe cascade 18 and the formation cascade 19 to the entrance 2 of the EMT tube 13. The stroking cascade is controlled by pulses, decreasing through delay node 16 and a standby generator 17 IMNs. From the signal received by the amplifier 14 by the gating cascade, a short pulse, in the order of one microsecond, is extracted from the area of the sensor focus, which is controlled by a brightness-emitting point. A scanner from the scanner unit 5, fed to the deflecting plates of the electron-beam tube 13, and the impulses from the electronic unit 12, fed to the input Z of the tube 13, form a two-dimensional echogram

investigated tissue section.

Subject invention

Claims (2)

1. Ultrasound diagnostic annarate, containing a sensor, changed into an intermediate medium, a sensor non-bias unit, an electronic unit, a scanner with an electron-beam tube, characterized in that, in order to improve the diagioscination accuracy by reducing the nomome caused by turbulent motion of the intermittent medium The unit is non-temporary, the sensor's sensor is made in the form of a rod with a guide for preventing the sensor from moving, which is perpendicular to the axis of the rod. 2. The apparatus according to claim 1, wherein the scanner unit is made in the form of an electrically connected rotating transformer, potentiometer, kinematically connected to the sensor, an alternating generator, an isolating transformer and two phase detectors. 20 fpuz.l