JPH067708U - Cardiac / thoracic ratio measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable efficient and accurate measurement of the heart-thoracic ratio. [Structure] An index 12 that is moved so as to be located at a total of four positions, that is, the left and right end positions of the rib cage 4 and the left and right end positions of the heart 5 shown in the X-ray photograph 3, is provided. The position of the index 12 detected by the position detecting means 14 is read by the read command switch 13 which is operated when the index 12 reaches the above four positions. The heart-thoracic ratio γ is calculated based on the read four positions, and the calculation result is displayed on the display screen 17 and the recording paper 18a of the printer 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heart-thoracic ratio measuring device for measuring a heart-thoracic ratio indicating a ratio of the width of the heart to the width of the thorax.

[0002]

[Prior art]

 Recently, as one of the tests for heart disease, the heart-thoracic ratio, which is the ratio of the width of the heart to the width of the chest, is often measured in order to know the tendency of cardiac hypertrophy. In order to measure this heart-thoracic ratio, the conventional method was to apply a straight-line to an X-ray photograph (radiograph) showing the chest and heart, and then measure the width of the chest and the width of the heart, respectively. , The ratio of these two measured values was calculated by a desk calculator.

[0003]

[Problems to be solved by the device]

 However, the above-described conventional measurement method has a problem that the calculation error is high and the efficiency is extremely low. In recent years, in particular, due to mass examinations and the like, there are many opportunities to measure the heart-thoracic ratio in large quantities at one time, and some measures are desired in this respect.

Therefore, an object of the present invention is to provide a heart-thoracic ratio measuring device capable of efficiently and accurately measuring the heart-thoracic ratio.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has the following configuration. That is, the index is manually operated and moved on the photograph showing the chest and the heart, the position detecting means for detecting the displacement position of the index, and the index is manually operated for each of the left and right sides of the chest. Read command means for reading the displacement positions detected by the position detecting means at a total of four positions, one at the end and one at each of the left and right ends of the heart, and read by the command of the read instruction means. Calculating means for calculating a heart-thoracic ratio, which is a ratio of the width of the rib cage to the width of the heart, based on the total four displacement positions, and display means for displaying the heart-chest rib ratio calculated by the calculating means. , Is provided.

The display means may be at least one of a display screen and a printer. The index may be directly moved by hand. In this case, guide means for guiding the index to move along a predetermined locus can be provided. The index and the position detecting means can be set so as to move integrally with each other.

The calculation means further includes a sort means for rearranging the four displacement positions read by the instruction of the read instruction means in order of magnitude, and the calculation means is the first one after being rearranged by the sort means. The heart-thoracic ratio should be calculated based on the first deviation, which is the deviation between the fourth value and the fourth value, and the second deviation, which is the deviation between the second value and the third value. You can

A main body equipped with a mounting surface on which the photograph is set and further equipped with the display means on the mounting surface side, and a predetermined linear locus provided on the main body and parallel to the mounting surface. It is possible to further include a guide means for guiding the user to move along. In this case, the index, the position detecting means, and the read commanding means can be set so as to move integrally with each other along the guide means.

A casing equipped with the index, the read command means, the calculation means and the display means, a guide rod for slidably holding the casing, and a longitudinal end portion of the guy rod. And a supporting leg that supports the guide rod so as to be parallel to a predetermined plane.

A casing equipped with the read command means, the calculation means, and the display means, an elongated body which can be wound into the casing, and an elongated body mounted in the casing, A spring for urging the long body to be wound into the casing, and the rotary position detecting means is housed in the casing, and The index may be provided at the other end of the elongated body that is linked to one end and extends to the outside of the casing.

[0011]

[Effect of device]

 According to the present invention, the index is brought to the positions of the left and right ends of the rib cage and the ends of the heart, which are four positions in total, and the read command means is operated at these four positions. Will automatically calculate the heart-thoracic ratio, and the calculation result will be displayed on the display means. Therefore, the time from the start of measurement of the heart-thoracic ratio to the time when the heart-thoracic ratio is displayed on the display means is extremely short, and the measurement efficiency is greatly improved. , The obtained heart-thoracic ratio is highly reliable, that is, accurate measurement can be performed.

With the configuration as described in claim 2, it is possible to check the heart-thoracic ratio extremely quickly by using the display screen, and record the heart-thoracic ratio one by one by using the printer. It will save you the trouble of doing.

By adopting the structure as described in claim 3, it becomes possible to easily and accurately bring the index to predetermined positions such as the left and right end positions of the rib cage and the end positions of the heart, and the structure Is also simplified, which is advantageous in terms of manufacturing cost.

With the structure as described in claim 4, it is preferable for promptly bringing the index to the predetermined position.

With the configuration as described in claim 5, it becomes possible to easily perform both the movement of the index and the reading command with one hand.

With the configuration as described in claim 6, the order in which the indexes are brought to the positions of the four positions does not matter, so that the labor for reading the displacement positions of these four positions is more efficient. You will be able to do it.

By adopting the configuration as described in claim 7, the ideal setting position of the photograph showing the rib cage and the heart is ensured, and the device is set as a whole to perform a predetermined examination such as a hospital. It is advantageous when installed and used on a desk in the room.

With the structure as described in claim 8, the operation of the index and the reading command can be easily performed with one hand, and the position detection can be made close to the photograph to improve the detection accuracy. it can.

By adopting the structure as described in claim 9, it is possible to provide a stable installation state with respect to a predetermined plane on which a photograph showing the rib cage and the heart is set, while making it considerably convenient to carry as a whole. Measurement can be performed while holding.

By adopting the structure as described in claim 10, not only is it extremely compact as a whole and convenient for carrying, but it is easy to use in a manner similar to using a general tape measure. Can be used for

[0021]

【Example】

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 FIGS. 1 to 4 show an embodiment of the present invention. First, in FIG. 1, 1 is a box-shaped main body, which is composed of a first box portion 1A and a second box portion 1B. The first box portion 1A has a thin rectangular parallelepiped shape and is used in a state where a large surface area thereof extends in the vertical direction. The second box portion 1B is horizontally long and low, and is fixed to the lower front surface of the first box portion 1A. With this second box portion 2B, the main body 1 can be placed in a stable state even on a desk in the state as shown in FIG.

The front wall 2 of the main body 1 is made of a semitransparent plate material, and the front surface thereof is a mounting surface (set surface) 2 a for the photograph 3. This photograph 3 consists of a chest X-ray photograph (X-ray photograph) of the subject, and as shown in FIG. 2, at least the rib cage 4 and the heart 5 are photographed. In the first box portion 1A, a light source 6 such as a fluorescent lamp is arranged on the back side of the mounting surface 2a, and the rib cage 4 and the heart 5 shown in the photograph 3 arranged on the mounting surface 2a are clearly shown. It is supposed to be projected on. As described above, the first box portion 1A (the mounting surface 2a of the first box portion 1A) constitutes a so-called Schaukasten which is often used when analyzing an X-ray photograph.

Two guide rods 7 extending straight in the left-right direction are provided immediately above the second box portion 1B, that is, on the lower front surface of the mounting surface 2a. The left and right ends of the guide rod 7 are fixed to sliders 8, respectively, so that the sliders 8 can move vertically along the guide grooves 9 formed in the left and right side walls of the first box portion 1A. However, due to sliding resistance, the immobile state at that position is maintained unless a special external force is applied. Of course, a lock mechanism such as a lock screw for locking the slider 8 at an arbitrary height position can be separately provided. The guide rods 7 extend in parallel to the plate surface of the mounting surface 2a and the lower edge thereof, and such a parallel state is maintained even if the slider 8 is moved to change its vertical position. .

A scale 10 is slidably held on the guide rod 7. The scale 10 has a casing 11, an index 12 extending upward from an upper surface of the casing 11, a casing 11 that can be operated from the outside of the casing 11, and a push-push type. A command switch 13 and a start switch SS are provided. In addition, the scale 10 constitutes a so-called mouse in a computer, and has a position detecting means 14 such as an encoder inside and a scale (not shown) interlocked with the position detecting means 14 to scale. A rolling member that is rolled (or rotated) by sliding on the mounting surface 2a when the lever 11 is displaced along the guide rod 7. The position detecting means 14 may adopt an appropriate configuration such as detecting the relative displacement position of the casing 11 with respect to the guide rod 7.

The second box portion 1 B is equipped with three display screens 15 to 17, a printer 18, a floppy disk drive 19, and a power switch 20. The display screens 15 to 17 are, for example, liquid crystal display type, the width α of the rib cage 4 is displayed on the screen 15, the width β of the heart 5 is displayed on the screen 16, and the heart-thoracic ratio is displayed on the screen 17. γ is represented. Further, the above values α, β, γ are recorded in the printer 18, respectively. It should be noted that the display screens 15 to 17 are arranged so as to be displayed toward the front surface in the same manner as the mounting surface 2a so as to be easily viewed by the measurer.

A control unit U configured by using a microcomputer is further installed in the second box portion 1B. The input / output relation to the control unit U is shown in FIG. is there. Next, the control content of the control unit U will be described with reference to the flowchart of FIG. 4 while also explaining how to use the measuring device. In the following description, P represents a step.

Of course, at the start of the measurement, the photograph 3 is set on the mounting surface 2a as shown in FIGS. 1 and 2, but at the time of this setting, one of the lower surface and the left and right side surfaces is mounted on the mounting surface 2a. It is brought into a predetermined posture by hitting a step formed on the edge of 2a, and thereafter, it is held stationary by a known clip (not shown) or the like. In addition, in FIG. 2, the index 12 is shown in a state in which it is positioned greatly downward from the maximum width portions of the rib cage 4 or the heart 5, but in reality, the index 12 is located at a height position near the maximum width. It is set.

Now, the power switch 20 is turned on to start the operation, and first, at P1, the system is initialized. After this, it is determined whether or not the start switch SS has been turned on, that is, whether or not a signal to start the measurement has been given by the measurer. If the determination in P2 is NO, the process directly returns to P2 and waits for the signal to start the measurement.

If the determination in P2 is YES, in P3, the position signal of the position detection 14 at the time when the ON signal from the command switch 13 is input is read, and this read value is temporarily stored. . Thereafter, in P4, it is determined whether or not the above-described process of P3 has been performed four times. When the determination in P4 is NO, the process returns to P3 again, and when the determination in P4 is YES, the process proceeds to P5. The processing of P3 and P4 is a total of four position readings of the positions of the left and right ends of the rib cage 4 and the left and right ends of the heart 5. That is, the measurer grasps the scale 11 and manually moves it to the left and right as shown in FIG. 2 so that the reference planes 12a of the index 12 are set to the left and right ends of the rib cage 4 and the left and right sides of the heart 5. When the position of each end is reached, the command switch 13 is turned on, so that the position signals indicated by the position detection means 14 when this is turned on are sequentially read.

In the embodiment, the position signal value detected by the position detecting means 14 becomes smaller as the scale 11 moves to the left. Therefore, the position signal value at the right end position of the chest 4 is L1, the position signal value at the right end position of the heart 5 is L2, the position signal value at the left end position of the heart 5 is L3, and the position signal value at the left end position of the chest 4 is When the value is L4, L1> L2> L3> L4.

When the determination in P4 is YES, in P5, the position signal values L1 to L4 indicating the read four positions are sorted in order of magnitude. That is, in the embodiment, the first rank value is sorted in order of L1, the second rank value is L2, the third rank value is L3, the fourth rank value is L4, and so on. By performing such a sort, the order of the indices 12 with respect to the four positions of the left and right end positions of the rib cage 4 and the left and right end positions of the heart 5 can be arbitrarily determined. Become.

After P5, in P6, the first deviation α indicating the width of the rib cage 4 is calculated by subtracting L4 from L1. In P7, the second deviation β indicating the width of the heart 5 is calculated by subtracting L3 from L2. Then, in P8, the ratio β is divided by α to calculate the heart-thoracic ratio γ.

At P9, the respective values α, β, γ obtained as described above are temporarily stored in the RAM of the control unit U. Thereafter, in P10, α 1, β, and γ are individually displayed on the display screens 15 to 17. Next, at P12, the recording paper 18a on which the respective values α, β, γ are recorded is output from the printer 18.

At the time of group medical examination and the like, the above-mentioned measurement is repeated with the photograph 3 changed. As a result of this repeated measurement, the RAM of the control unit U stores a set of α, β, γ corresponding to the number of persons to be inspected. The values of α, β, and γ are stored and saved in an external storage medium called a floppy disk.

FIGS. 5 and 6 show another embodiment of the present invention, in which the same components as those in the above embodiment are designated by the same reference numerals and the description thereof is omitted. In this embodiment, the support legs 32 are attached to the end portions of one guide rod 31 in the longitudinal direction, and when the support legs 32 are placed on a predetermined plane R on which the photograph 3 is placed, 31 is stably held in a state parallel to the predetermined plane.

A scale 33 is slidably held on the guide rod 31, and the scale 33 is attached to the casing 34 by an index 12, a command switch 13, and a guide switch 13. Small display screens 15 to 17, a start switch SS, and a control unit U are respectively incorporated.

According to the present embodiment, as compared with the case shown in FIG. 1, the size is considerably reduced, which is advantageous when the heart-thoracic ratio is measured while frequently changing the place of use. . A stopper plate 35 may be installed between the left and right support legs 32 to form a positioning surface by which the photograph 3 is abutted. Similarly, the inner surface 32a of at least one of the left and right support legs 32 is also configured as a positioning surface with which the side surface of the photograph 3 is abutted to perform its positioning (formed as a flat surface perpendicular to the guide rod 31). I will). A small dry battery such as a button battery incorporated in the casing 34 is used as the power source.

FIG. 7 shows still another embodiment of the present invention, in which the measuring device is a tape measure type. That is, the position detecting means 14 including a rotary encoder and the control unit U are housed in a small portable casing 41, and the position detecting device 14 is moved in a predetermined direction (in the embodiment, a timepiece shown in the drawing). A coil spring 42 that urges to rotate in the direction) is housed. Further, the casing 41 is equipped with a command switch 13, a start switch SS, and small display screens 15 to 17. A small dry battery such as a button battery incorporated in the casing 41 is used as the power source.

Further, in the present embodiment, a rollable elongated body 43 made of a thin steel plate, a thin wire made of metal or the like is used, and one end of the elongated body 43 slides into the casing 41. It is self-inserted and fixed to the outer circumference of the rotary position detecting means 14. That is, although the position detecting means 14 also serves as the winding drum, a separate winding drum may be provided. Further, the indicator 12 is formed on the other end of the elongated body 43 extending outside the casing 41.

Although detailed description is omitted, when the long body 43 is pulled out from the casing 41 as in the case of a commercially available tape measure, the long body 43 is locked at this pulling position, It is preferable that when the predetermined lock release button is operated, the elongated body 43 is caught in the casing 41 by the urging force of the spring 42.

In the case of this embodiment, the casing 41 is placed on a predetermined plane R such as a desk on which the photograph 3 is set, and the casing 41 is fixed, held and switched by the left hand, for example. 13, while operating the SS, it is sufficient to move the index 12 with the right hand. Of course, the measurement is performed so that the elongated body 43 is in a tensioned state (state without slack).

In order to fix and hold the casing 41 on the predetermined plane R, a holding means such as a suction cup may be provided on the back surface of the casing 41 (the back side of the paper in FIG. 7). In this case, a rotating joint is interposed between the holding means such as a suction cup and the casing 41 so that the casing 41 can rotate at least a predetermined angle in a plane parallel to the predetermined plane R. It is good (to secure the relative posture angular position of the casing 41 with respect to the photograph 3 for easy measurement).

Although the embodiment has been described above, the present invention is not limited to this, and the following may be adopted, for example. First, a clear switch is provided so that it can be dealt with when the read command switch 13 is operated at an incorrect position during measurement, and when this clear switch is operated, all records (memories) currently being measured are recorded. May be cleared and the process may be forcibly returned to step P1 in FIG. In this case, whether or not the clear switch has been operated can be detected by the interrupt processing for FIG. Further, a step of confirming whether or not to display may be provided between P4 and P5 in FIG. 4, and this confirmation is performed by checking whether or not a separately provided confirmation switch is operated, or This can be done by checking whether or not the start switch SS has been operated a plurality of times within a predetermined time.

It is also possible to configure the control system by using an analog circuit without using the microcomputer. In this case, if the measurement order (the order in which the index 12 is brought) of a total of four positions including the left and right end positions of the rib cage 4 and the left and right end positions of the heart 5 is determined, the control circuit is further simplified. It will be. Of course, such a control system can be made into an extremely small size by forming an IC chip.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of a main part of FIG.

FIG. 3 is a control system diagram of the embodiment shown in FIG.

4 is a flow chart showing a control example of the embodiment shown in FIG.
To.

FIG. 5 is a plan view showing another embodiment of the present invention.

FIG. 6 is a view on arrow A in FIG.

FIG. 7 is a plan view showing still another embodiment of the present invention.

[Explanation of symbols]

 1: Main body 2: Front wall 2a: Mounting surface 3: Photograph 4: Chest 5: Heart 7: Guide rod 11: Casing 12: Index 13: Read command switch 14: Position detection means 15: Display screen 16: Display screen 17: display screen 18: printer 31: guide rod 32: support leg 34: casing 41: casing 42: spring 43: long body U: control unit R: predetermined plane

Claims (10)

[Scope of utility model registration request] 1. An index which is manually operated and moved on a photograph showing a chest and a heart, a position detecting means for detecting a displacement position of the index, and the index which is manually operated on each side of the chest. Read command means for reading the displacement positions detected by the position detecting means at a total of four positions, one at the end and one at each of the left and right ends of the heart, and read by the command of the read instruction means. Calculating means for calculating a heart-thoracic ratio, which is a ratio of the width of the thorax to the width of the heart, based on the total four displacement positions obtained; and a display means for displaying the heart-thoracic ratio calculated by the calculating means. A heart-thoracic ratio measuring device comprising: 2. The display device according to claim 1, wherein the display means is at least one of a display screen and a printer. 3. The index according to claim 1, wherein the index is directly moved by hand. 4. The guide device according to claim 3, further comprising guide means for guiding the index to move along a predetermined locus. 5. The set according to claim 3, wherein the index and the position detecting means are integrally moved with each other. 6. The method according to claim 1, further comprising sort means for rearranging the four displacement positions read by the instruction of the read instruction means in order of magnitude, wherein the calculating means is rearranged by the sort means. The first deviation, which is the deviation between the first value and the fourth value after
Calculating the heart-thoracic ratio based on a second deviation which is a deviation between the third value and the third value. 7. The main body according to claim 1, further comprising a mounting surface on which the photograph is set, and the display means is mounted on the mounting surface side; and the indicator provided on the main body and the mounting surface. And a guide means for guiding the movement along a predetermined parallel straight line locus. 8. The set according to claim 7, wherein the index, the position detecting means and the read commanding means are set so as to move integrally with each other along the guide means. 9. The casing according to claim 1, wherein the casing is equipped with the index, the read command means, the calculation means and the display means, a guide rod for slidably holding the casing, and a guide rod for the guide rod. Support legs provided at respective longitudinal end portions for supporting the guide rods in parallel with each other along a predetermined plane. 10. The casing according to claim 1, wherein the casing is equipped with the read command means, the calculation means, and the display means, an elongated body that can be wound into the casing, and the casing. A spring that is installed in the casing and biases the elongated body so as to wind the elongated body into the casing, and the rotary position detecting means is housed in the casing. The index is provided at the other end of the elongated body which is linked to one end of the elongated body and extends outside the casing.