SU1287837A1 - Apparatus for measuring the dimensions of blood vessels - Google Patents

Abstract

The invention is intended to diagnose diseases that cause ./ changes in the diameters of the blood vessels of the ocular fundus and conjunctiva, and improves the accuracy of measurements. The device comprises an image signal sensor 1, a television converter 2, a monitor 3, a 4 marker driver, a tag control unit 5, meters 6 and 7 horizontally and vertically in size. Shaper 4 generates a signal that highlights the vertical and horizontal lines on the monitor screen with two glowing dots on each of them. Shaper 4 contains single vibrators 8, 9, 13–20, 25, and 26, elements 10, 21, 23, 27, and 29, adder 12, trigger & (L

Description

hera 11, 22, 24, 28 m 30. The position of the slider of potentiometer X on the panel of block 5 sets the position of the horizontal line on monitor 3. The potentiometers of potentiometers XI and X2 select the position of points on the line. When combining points XI and X2 with the ends of the measured segment, trigger 24 produces a pulse, the duration of which

one

The invention relates to the field of medicine, namely to measuring and recording devices, and can be used to diagnose diseases that cause changes in the diameters of the blood vessels of the fundus and the conjunctiva.

The purpose of the invention is to improve the measurement accuracy.

Fig. 1 shows a structural electrical circuit of the device; 2 shows timing diagrams for the operation of the device.

The device comprises an image signal sensor 1, a television converter 2, a television monitor 3, a 4 marker driver, a tag control unit 5, a 6 horizontal dimensions meter and a 7 vertical dimensions meter.

The shaper 4 tags contains successively connected first and fourth single vibrators 8 and 9, the first element I 10, the first trigger 11, the adder 12, and also the fifth one vibrator 13, the sixth one vibrator 14 connected to the adder 12, the eighth one vibrator 15, through the seventh one-shot 16 connected to the third input of the adder 12, the twelfth one-shot 17 and the eleventh one-shot 18, successively connected the third one-shot 19, nine one-shot 20, the second element And 21, the second trigger 22 and the third element And 23, in addition, th trigger 24 and in series connected the second one-shot 25, the tenth one-shot 26, the fourth element And 27, the third trigger 28, the fifth element And 29 and the fourth trigger

proportional to the measured segment along the X axis. Similarly, the pulse duration of the trigger 30 is proportional to the measured segment along the Y axis. Measuring instruments 6 and 7 determine the average pulse duration. The diameter of the blood vessel is then calculated according to a known relationship. 2 or:

30, the output of which is connected to the meter 7 vertical sizes.

The device works as follows.

From sensor 1, an image of a fragment of a network of blood vessels of the eye is converted into a video signal by a television converter 2, which is connected to one input of a television monitor 3, another input of a television monitor is connected to the first output of a tag formation unit horizontally and vertically 4, which generates a signal flashing on the screen monitor vertical and horizontal lines with two bright points for each, oh of them. The control unit 5 labels horizontally and vertically, including potentiometers, the operator

can move lights around the screen5

thirty

perpendicular lines (cross), thereby choosing the measurement location (the intersection of the lines should be inside the contour of the vessel being measured). By shifting the light points to their alignment with the points of intersection of the blood vessel with the horizontal and vertical lines, the ends of the measured segments are fixed. The length of the segments in the horizontal direction is measured by a meter 6 sizes horizontally, and in the vertical direction by a meter 7 sizes vertically. The accuracy of determining the dimension of the horizontal horizontally is determined by the accuracy of the meter 6, and vertically by the discreteness of the horizontal scanning. Shaper 4 labels works on the following algorithm. Produced by

 Te lev from an ion converter 2 human sync pulses (XI) trigger

one-shot 8, generating a pulse with a duration of 1 to 20 x, depending on the position of the potentiometer, setting the X-axis in block 5. The back edge of this pulse starts the one-shot 9, generating a pulse of 32 microseconds, which goes to the first input of the AND 10 logic element, to the second the input of which receives horizontal sync pulses (FID) from block 2. At the output of element 10, one FID appears from an even or odd television half-frame, which translates the trigger 11 into the position of the logical unit. The next FID reverses trigger 11, thereby at the output of trigger 11 a pulse of 64 microseconds (the length of one line) is received, which is supplied

f5

The generation of the upper and lower points on a given vertical occurs in a similar way as the formation of a horizontal line. Their position depends on the position of the potentiometer sliders Y and YP, respectively. Single-vibrators, 25 and 26, and elements 21 and 27, triggers 22 and 28 generate pulses of illumination of the corresponding lines. The impulse from the trigger 22 goes to the first input of the element I 23, the second input of which receives a pulse from the output of the block 18. The output impulse of the block 23 goes to the fourth inlet of the adder 12 and the first input of the information trigger 30. The top point on the vertical is displayed on the monitor screen. Similarly, the pulse from the output of the trigger 28 enters

It goes to the first input of the adder 12, the first input of the element I 29, the second of which is connected to the second input of which receives a pulse of the television monitor 3. Thus, from the output of the block 18. The output pulse in the monitor 3 The element 29 is highlighted on the fifth single horizontal line, the 5 input of the adder 12 and the second input of the information trigger 30, and the lower point is displayed on the screen of the monitor 3.

Thus, when combining measuring points Y / and Y with the beginning and end of the measured vertical

the position of which depends on the position of the slider of the potentiometer X- on the panel of the block 5.

The sync pulses of the beginning of the selected line from the element And 10 also arrive in the one-shot 13, the duration

the pulse of which depends on the position of the potentiometer engine for setting the left point X, in block 5, the back edge of which launches the one-shot 14, producing a short pulse of 0.125 µs, fed to the second input of the adder 12 and the first input of the information trigger 24. Similarly, the right point is formed. When combining measuring points X and X with the beginning and end of the measured segment, information trigger 24 produces a pulse, the duration of which is proportional to the measured segment along the X axis.

The choice of the position of the vertical at which the measurement takes place is determined by the pulse duration of the one-shot 17, triggered by the FID

35

40

45

the length of the output pulse of the trigger 30 is proportional to the measured segment along the Y axis.

The pulses of the flip-flops 24 and 30, the duration of which is proportional to the magnitude of the measured projections, arrive at gauges 6 and 7 of the dimensions horizontally and vertically. Both gauges are built according to the same time interval transducer to digital code 2 with information output to seven-segment digital indicators and to a communication connector with an EUM-23 type electric typewriter.

The measurement of the projections occurs after the installation of the measuring marks on the measured blood vessel, pressing the buttons on the front panel of the measurement, depending on the position of the sliders 6 and 7 (not shown). Resetting the Y potentiometer on block 5. The back edge of this pulse triggers a one-shot 18, producing a pulse of 0.125 msec on each line that goes to the sixth input of the adder 12, and a vertical line is displayed on the screen of monitor 3.

o

five

The generation of the upper and lower points on a given vertical occurs in a similar way as the formation of a horizontal line. Their position depends on the position of the potentiometer sliders Y and YP, respectively. Single-vibrators, 25 and 26, and elements 21 and 27, triggers 22 and 28 generate pulses of illumination of the corresponding lines. The impulse from the trigger 22 goes to the first input of the element I 23, the second input of which receives a pulse from the output of the block 18. The output impulse of the block 23 goes to the fourth inlet of the adder 12 and the first input of the information trigger 30. The top point on the vertical is displayed on the monitor screen. Similarly, the pulse from the output of the trigger 28 enters

the first input of the element is 29, the second input of which receives a pulse from the output of the block 18. The output pulse of the element 29 goes to the fifth 5 input of the adder 12 and the second input of the information trigger 30, and the bottom point is displayed on the screen of the monitor 3.

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40

45

the length of the output pulse of the trigger 30 is proportional to the measured segment along the Y axis.

The pulses of the flip-flops 24 and 30, the duration of which is proportional to the magnitude of the measured projections, are sent to the meters 6 and 7 of the dimensions horizontally and vertically. Both meters are built according to the same time interval transducer into digital code 2 with information output to seven-segment digital indicators and to a communication connector with an EUM-23 typewriter.

The measurement of the projections occurs after the installation of the measuring marks on the measured blood vessel, pressing the buttons on the front panel of the gauges 6 and 7 (not shown). Reset to zero the digital indicator, Start for arbitrary time. start counting, until an arbitrary moment, press the Stop button. Measuring instruments 6 and 7 determine the average duration of incoming 1p-1 pulses (25 measurements are made in T s), which guarantees a high accuracy of measurements and the elimination of errors. The results are typed on an EUM-23,

The diameter of a blood vessel is calculated using the Pythagorean theorem using any calculators up to input information into a micro-computer.

The diameter of the blood vessel is a b

 one

) 2-C

Where

readings meter readings meter

6; 7

Claims (1)

Invention Formula A device for measuring the size of blood vessels, comprising an image signal sensor, a television transducer connected to f5 It is connected via the seventh and eighth mono-vibrators sequentially connected to the first input of the fifth mono-vibrator and to the output of the first element I, the output of the third one-vibrator through the series-connected nine: th one-vibrator, the second element I connected to the fourth input of the adder, the output of the second one-shot through the serially connected tenth one-shot, the fourth element I, the third trigger, the fifth element And the fourth trigger is connected to the input of the size meter vertically, the first and second inputs of the fourth trigger are connected to the fourth and fifth inputs, respectively, of the adder, the sixth input of which is connected by a four-monitor monitor, the driver cuts the eleventh one-shot from the optics, the horizontal and vertical dimensions, the control unit of labels, in order to improve measurement accuracy, in it the horizontal and vertical label driver is made in the form of three one-shotrs, the inputs of which are connected to the output clock of the television pulses brazovatel, the output of the first one-shot is connected through the fourth one-shot with a series-connected first element And, the first trigger and the adder, the output of which is connected to 25 thirty the house of the twelfth one-shot, the first input of which is connected to the output of the lower-case clock pulses of the television converter, the second inputs of the first, second and fourth elements of AND and the first, second and third triggers, the second inputs of the third and fifth elements of AND, are connected to the output of the eleventh one-oscillator, outputs the sixth and seventh single vibrators are connected to the inputs of the fifth trigger, the output of which is connected to the input of the horizontal size meter, inputs X, X, X, Y, Y, Y blo, -1 1 -1 1 -2 the second input of the television monitor, 35 ka label management, is connected to the output of the fifth one-shot one connected via the sixth one-shot, to the second input of the adder, the third input five It is connected via the seventh and eighth mono-vibrators sequentially connected to the first input of the fifth mono-vibrator and to the output of the first element I, the output of the third one-vibrator through the series-connected nine: th one-vibrator, the second element I connected to the fourth input of the adder, the output of the second one-shot through the serially connected tenth one-shot, the fourth element I, the third trigger, the fifth element And the fourth trigger is connected to the input of the size meter vertically, the first and second inputs of the fourth trigger are connected to the fourth and fifth inputs, respectively, of the adder, the sixth input of which is connected to the house of the twelfth one-shot, the first input of which is connected to the output of the lower-case clock pulses of the television converter, the second inputs of the first, second and fourth elements of AND and the first, second and third triggers, the second inputs of the third and fifth elements of AND, are connected to the output of the eleventh one-oscillator, outputs the sixth and seventh single vibrators are connected to the inputs of the fifth trigger, the output of which is connected to the input of the horizontal size meter, the inputs X, X, X, Y, Y, Y block 1 -1 1 -2 responsibly to the second inputs of the first, second, eighth, twelfth, third and pth one-shot ones. / 7ff ec7 / 7i / ja / 77a i / I / 7ff e / 7. J.JLJULJL. -al-gpp lUL Ljul Editor L. Gratshsho Compiled by A. Dmitriev Tehred L.Oleynik Proofreader M.Pojo Order 7739/4 Circulation 617 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FI.2