KR20200073402A - Method for measuring rotation of vertebral body, apparatus and computer readable medium for performing the method - Google Patents

Abstract

According to an embodiment of the present invention, a vertebral body rotation measurement apparatus may comprise: a spine image collection unit for collecting photographed images of a vertebral body and a pair of pedicles formed on the vertebral body; a parameter setting unit which sets parameters for detecting the amount of rotation of the vertebral body by measuring the width of the vertebral body and the separation distance between the pair of pedicles; and a rotation amount calculation unit which calculates the rotation angle of the vertebral body based on the set parameters.

Description

Method for measuring vertebral body rotation, device and recording medium for performing it METHOD FOR MEASURING ROTATION OF VERTEBRAL BODY, APPARATUS AND COMPUTER READABLE MEDIUM FOR PERFORMING THE METHOD}

The present invention relates to a method for measuring vertebral body rotation, an apparatus for performing the same, and a recording medium, and more specifically, a vertebral body rotation measuring method for calculating an angle at which the vertebral body is rotated from its original position using an image of the vertebral body. It relates to a device and a recording medium for.

When the screw of the spine is inserted, the rotation of the vertebral body is an important factor for correct screw insertion. In particular, scoliosis or degenerative spinal disease is accompanied by rotational deformity of the vertebral body, so caution is required when inserting screws, and spinal screw insertion has been used as a conventional method, but free hand technique has been used in recent years to improve accuracy. Screw insertion using a robot arm is being attempted.

At this time, it is important to check the rotation of the vertebral body for correct screw insertion. For this, most of them use computed tomography.

In general, computed tomography is taken in the supine position, which is in the supine position before surgery, but most of the actual spinal surgery is performed in the prone position, and rotational deformation changes after anesthesia during surgery or depending on the patient's posture during surgery. Due to the change, it is limited to confirm the rotational deformation of the vertebral body using only computed tomography images taken before surgery. In this case, there is a problem in that a rotation error occurs due to a change in the posture of the patient, and an additional special computerized tomography or expensive equipment such as an O-arm capable of imaging after anesthesia in the operating room is required.

Accordingly, there is a need for a technique for accurately detecting the amount of rotation of the vertebral body using a simple method.

Korean Registered Patent No. 10-1124144 Korean Patent Publication No. 10-2011-0105879

One aspect of the present invention provides a method for measuring a vertebral body rotation that can reliably measure the amount of axial rotation of a vertebral body using only a two-dimensional photographic image of the vertebral body, an apparatus for performing the same, and a recording medium.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A device for measuring vertebral body rotation according to an embodiment of the present invention includes a vertebral body image collection unit for collecting a vertebral body and a pair of vertebral body imaged images formed on the vertebral body, the width of the vertebral body, and the distance between the pair of pedicles It includes a parameter setting unit for setting a parameter for detecting the amount of rotation of the vertebral body by measuring a distance and a rotation amount calculating unit for calculating the rotation angle of the vertebral body based on the set parameter.

The parameter setting unit may set the measured width of the vertebral body as the first parameter, and set the length from the midpoint of the separation distance to the left or right side of the vertebral body as the second parameter.

The rotation amount calculating unit may calculate a rotation angle of the vertebral body according to a ratio of the second parameter to the first parameter.

The parameter setting unit, centering on the center of the vertebral body, creates a circle having a width of the vertebral body as a diameter, and on a line segment connecting both end points of the diameter, a reference line segment based on a first normal passing through the midpoint It can be set to generate a comparison line segment connecting the midpoint from the intersection of the first normal and the circle passing through a point spaced apart by the second parameter from any one end point of the diameter.

The rotation amount calculating unit may calculate an inner angle of the reference line segment and the comparison line segment as a rotation angle of the vertebral body.

The rotation amount calculating unit generates a virtual right-angled triangle having the comparative segment as the hypotenuse and the reference segment as the base, and using a sine function, the angle between the reference segment and the comparative segment is the rotational angle of the vertebral body. Can be calculated.

The spine image collection unit may collect a radiographic image of a pair of pedicles formed on a side portion of the vertebral body and a side portion of the vertebral body by photographing the vertebral body in a predetermined direction as the captured image.

In addition, the method for measuring vertebral body rotation performed by the vertebral body rotation measuring apparatus according to an embodiment of the present invention collects a vertebral body and a pair of vertebrae photographed images formed on the vertebral body, the width of the vertebral body and the one The distance between the pedicles of the pair is measured to set parameters for detecting the amount of rotation of the vertebral body, and the rotation angle of the vertebral body is calculated based on the set parameters.

Setting the parameter may be to set the measured width of the vertebral body as the first parameter, and set the length from the midpoint of the separation distance to the left or right side of the vertebral body as the second parameter. .

Calculating the rotation angle of the vertebral body may be calculating the rotation angle of the vertebral body according to a ratio of the second parameter to the first parameter.

Setting the parameter, focusing on the center of the vertebral body, creates a circle having a width of the vertebral body as a diameter, and on a line segment connecting both ends of the diameter, a first normal passing through the midpoint Set as a reference line segment, it may be to generate a comparison segment connecting the midpoint from an intersection point of the first normal line and the circle passing through a point spaced apart by the second parameter from one end point of the diameter. .

The rotation angle of the vertebral body may be calculated by calculating an internal angle of the reference line segment and the comparison segment as the rotation angle of the vertebral body.

Calculating the rotation angle of the vertebral body, generates a virtual right-angled triangle having the comparative segment as the hypotenuse, and the reference segment as the base, and uses a sine function to calculate the internal angle between the reference segment and the comparative segment. It may be calculated by the rotation angle of.

Collecting the photographed image may be to collect a radiograph of a pair of pedicle formed on a side portion of the vertebral body and a side portion of the vertebral body by photographing the vertebral body in a predetermined direction as the captured image.

In addition, the computer-readable recording medium according to the present invention may record a computer program for performing the method for measuring the rotation of a vertebral body according to the present invention.

According to one aspect of the present invention described above, it is possible to easily set a parameter for evaluating vertebral body rotation using only the information displayed on a simple two-dimensional image, and use this to accurately calculate the rotational angle of the vertebral body. .

1 is a block diagram showing a schematic configuration of a vertebral body rotation measuring apparatus according to an embodiment of the present invention.
2 is a view for explaining the vertebral body and pedicle constituting the spine.
3 to 6 are views showing a specific example for calculating the rotation angle of the vertebral body.
7 is a flowchart illustrating a schematic flow of a method for measuring vertebral body rotation according to an embodiment of the present invention.

For a detailed description of the present invention, which will be described later, reference is made to the accompanying drawings that illustrate, by way of example, specific embodiments in which the invention may be practiced. These examples are described in detail enough to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the invention are different, but need not be mutually exclusive. For example, the specific shapes, structures, and properties described herein can be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it should be understood that the location or placement of individual components within each disclosed embodiment can be changed without departing from the spirit and scope of the invention. Therefore, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention, if appropriately described, is limited only by the appended claims, along with all ranges equivalent to those claimed. In the drawings, similar reference numerals refer to the same or similar functions across various aspects.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a block diagram showing a schematic configuration of a vertebral body rotation measuring apparatus according to an embodiment of the present invention.

The vertebral body rotation measuring apparatus 1 according to the present invention is a medical device for evaluating vertebral body rotation during spinal surgery, and measures the distance between pedicles in a captured image to evaluate the degree of rotation of the vertebral body. have.

That is, the vertebral body rotation measuring apparatus 1 according to the present invention can measure how much the vertebral body has been rotated by using only a two-dimensional image, and can be used for a spinal rotation when a pedicle screw is inserted using a navigation system during spinal surgery. Providing information can assist in the correct insertion of screws.

To this end, the vertebral body rotation measuring apparatus 1 according to the present invention may be installed and executed with software (application) for measuring the amount of rotation of the vertebral body according to the vertebral body rotation measuring method according to the present invention. ) Can be controlled by software for performing a method for measuring a vertebral body rotation performed in each configuration constituting the vertebral body rotation measuring device 1 described below.

The vertebral body rotation measuring device 1 may be mobile or stationary. The vertebral body rotation measuring apparatus 1 may be in the form of a server or an engine, and may be a device, an apparatus, a terminal, a user equipment (UE), a mobile station (MS), It can also be called another term, such as a wireless device or a handheld device.

The vertebral body rotation measuring apparatus 1 may execute or manufacture various softwares based on an operating system (OS), that is, a system. The operating system is a system program for enabling the software to use the hardware of the device, such as Android OS, iOS, Windows Mobile OS, Sea OS, Symbian OS, BlackBerry OS Mobile computer operating system and Windows series, Linux series, Unix series, It can include any computer operating system such as MAC, AIX, HP-UX.

Specifically, the vertebral body rotation measuring apparatus 1 according to an embodiment of the present invention may include a spine image collection unit 100, a parameter setting unit 200, and a rotation amount calculating unit 300.

At this time, the vertebral body rotation measuring apparatus 1 may be a separate terminal or a part of a module of the terminal. In addition, the configuration of the spine image collection unit 100, the parameter setting unit 200, and the rotation amount calculating unit 300 may be formed of an integrated module, or may be formed of one or more modules. However, on the contrary, each configuration may be made of a separate module.

The spine image collection unit 100 may collect a captured image (spine image) for measuring the amount of rotation of the vertebral body. In this regard, it will be described with reference to FIG. 2 together.

2A is a view showing a spine model, and FIG. 2B is an example of a radiographic image of a spine model taken from the side.

In the human body, 33 vertebrae are stacked from the head bone to the tail bone, and each vertebrae is composed of a vertebra body surrounding the intervertebral disc and a vertebrae arch in the form of a spinal cord as shown in FIG. 2A. In between, the vertebral canal is formed between the vertebral body and the vertebral body to locate the spinal nerve.

At this time, the portion where the vertebral body and the vertebral root are connected is called a pedicle (pedicle), and when a vertebral body is viewed from the side, it can be seen that a pair of pedicles were formed on the side of the vertebral body.

In general, when radiography using x-ray, as described above, the actual spinal surgery is performed in a different posture than in radiography, and rotational deformation after anesthesia occurs during surgery or changes according to the patient's posture during surgery. Due to the occurrence, there is a limit to confirm the rotational deformation of the vertebral body using only computed tomography images taken before surgery. In order to solve this problem, the vertebral body rotation measuring apparatus 1 according to the present invention does not require a separate imaging image for evaluating the rotation of the vertebral body, and measures the amount of rotation of the vertebral body using a radiographic image that is generally photographed. can do.

That is, the spine image collection unit 100 is the shape of a pair of pedicle formed on the side of the vertebral body and the side of the vertebral body by photographing the vertebral body to be measured in a predetermined direction at a position (attitude) during the operation or procedure of the user (patient). The photographed radiograph may be collected as a captured image.

Here, the photographed image may be defined as an image photographed while the center of the vertebral body is aligned with the center of the C-arm or X-ray photographing apparatus. However, the photographed image is not limited to the above-described example, and if a shape of a pair of pedicles formed on the lateral portion of the vertebral body and the lateral portion of the vertebral body can be photographed, it is inclined at a predetermined angle in the direction of the caudal or head bone (cephalad). It may further include an image of a true spine.

The spine image collection unit 100 may receive a captured image photographed by an external device through wired or wireless communication. Alternatively, the captured image may be obtained by itself through the imaging unit provided in the vertebral body rotation measuring apparatus 1 of the spine image collection unit 100.

The parameter setting unit 200 may analyze a captured image collected from the spinal image collection unit 100 and set parameters for detecting the amount of rotation of the vertebral body displayed on the captured image. In this regard, it will be described with reference to FIGS. 3 and 4 together.

3 to 4 are diagrams illustrating a specific example of setting parameters from a captured image. 3 is a conceptual view illustrating an example of setting parameters from the vertebral body and pedicle shown in FIG. 2B, and FIG. 4 is a plan view of the spine model shown in FIG. 2B.

The parameter setting unit 200 may set at least two parameters for detecting the amount of rotation of the vertebral body from the captured image as shown in FIG. 3.

Specifically, the parameter setting unit 200 may measure the width of the vertebral body displayed on the photographed image and the distance between the pair of pedicles formed inside the vertebral body. The parameter setting unit 200 sets the width of the measured vertebral body as the first parameter (b), and the length from the midpoint (C) of the measured separation distance to the left or right side of the vertebral body is the second parameter ( Can be set to a).

In one embodiment of the present invention, the parameter setting unit 200 sets the width of the upper side or the lower side of the vertebral body as the first parameter (b), and determines the length from the midpoint (C) to the left or right side of the upper side. Can be set as the second parameter (a).

In another embodiment of the present invention, the parameter setting unit 200, as shown in Figure 3 (a), the concave portion of the side of the vertebral body, that is, the width between the midpoints of both sides of the vertebral body is the first parameter ( b), and the length from the midpoint (C) to the left midpoint or the right midpoint can be set as the second parameter (a).

On the other hand, the rotation amount calculating unit 300 calculates the rotation amount (rotation angle) of the vertebral body using a trigonometric function. For this, the length of the side of the right-angled triangle having the rotation angle as the internal angle needs to be defined.

At this time, as shown in FIG. 4, when the parameter setting unit 200 sets the width of the vertebral body as the first parameter (b), the central portion of the vertebral body is set to O and the width of the vertebral body is diameter. In the circle, the direction of the reference line segment L1 passing through the midpoint O may be the direction of the vertebral body. That is, the rotation amount calculating unit 300 may calculate the rotation angle of the reference line segment L1 in the rotational direction of the vertebral body.

That is, as the parameter setting unit 200 sets the width of the vertebral body as the first parameter (b), the central part O of the vertebral body is used as the center point, and the width of the vertebral body, that is, the first parameter ( A virtual circle can be created with b) as the diameter.

Then, the parameter setting unit 200 may measure the midpoint C of the distance P1-P2 between a pair of pedicles formed on the vertebral body. For example, the parameter setting unit 200 may measure the midpoint of the distance between the inner surfaces facing each other from the pair of pedicles as the midpoint (C) of the distance between the pair of pedicles (P1-P2). . As another example, the parameter setting unit 200 may measure the midpoint of the line segment connecting the central points of each pedicle as the midpoint C of the distance P1-P2 between the pair of pedicles. In addition to this, the parameter setting unit 200 may measure the midpoint of various indicators capable of explaining the separation distance between two pedicles as the midpoint C of the distance P1-P2 between a pair of pedicles.

Thereafter, the parameter setting unit 200 may set the distance from the measured midpoint C to the left or right boundary surface of the vertebral body as the second parameter (a). In this case, the second parameter (a) may represent the movement distance of the reference line segment (L1) and the contact point (X) between the circle, which is the rotation of the center point (C) of the distance (P1-P2) between both pedicles) It can be the same as the angle. Details related to this will be described later.

Thereafter, the parameter setting unit 200 displays the first parameter (b) and the second parameter (a) set in the captured image collected by the spine image collection unit 100, so that the vertebral body rotation measuring apparatus 1 ) Can be controlled to be displayed as image information on a display device (eg, a monitor) interlocked with. Accordingly, the medical staff and the patient, which are output by the display device, can easily identify the degree of rotation of the vertebral body by simply checking the vertebral body image overlaid with parameters.

The rotation amount calculating unit 300 may calculate the rotation angle of the vertebral body using the first parameter b and the second parameter a set by the parameter setting unit 200. In this regard, it will be described with reference to FIGS. 5 and 6 together.

5 and 6 are views showing a specific example of calculating the rotation angle of the vertebral body. 5 is a conceptual diagram illustrating an example in which a parameter is changed when the vertebral body is rotated in a specific direction, and FIG. 6 is a diagram illustrating a specific example of calculating the rotation angle of the rotated vertebra.

The rotation amount calculating unit 300 may calculate the rotation angle of the vertebral body based on the change in the position of the pair of pedicles.

As shown in FIG. 5, when the vertebral body is rotated in a specific direction, the pedicle may be displayed on the captured image while the vertebral body is moved by the rotated angle. As described above, since the photographed image is a radiograph representing a vertebral body in a two-dimensional form, when the vertebral body is rotated by a specific angle or more, any one of the pair of pedicles may or may not be partially displayed.

In this case, the position of the midpoint of the separation distance between the pedicles can also be moved according to the rotation angle of the vertebral body, and the size of the second parameter set to the length from the midpoint (C') to either side can also be varied. Yes (a->a').

Accordingly, the rotation amount calculating unit 300 always rotates the vertebral body according to the change amount of the ratio of the second parameter (a') having a variable value according to the rotation of the vertebral body with respect to the first parameter (b) having a constant value. You can calculate the angle.

6 is a plan view of the rotated vertebral body shown in FIG. 5, when the vertebral body rotates in a specific direction, the reference line segment L1 may also be rotated by the rotational angle of the vertebral body (L2). That is, the rotation amount calculating unit 300 may calculate the size of the inner angle formed by the reference line segment L1 before rotation and the reference line segment L2 after rotation as the rotation angle θ of the vertebral body.

At this time, the rotation angle θ is the center point (O) of the vertebral body, the reference line segment (L2) after rotation and the intersection point (X') with the circle, and the contact point (Y) perpendicular to the reference line segment (L1) before rotation from X' It can be defined as the interior angle between the base and the hypotenuse of a right-angled triangle with a vertex.

Hereinafter, for convenience of explanation, a line segment connecting both ends of a diameter in a virtual circle created with a center of the vertebral body as the center point (O), and a width of the vertebral body, that is, a first parameter (b) as a diameter. The first normal passing through the midpoint O is defined as a reference line segment L1 and described. Then, the center point from the intersection (X') where the circle intersects the second normal passing through the point spaced apart by the length of the second parameter (a) from one end point of the diameter (the right end point in the illustrated embodiment). The line segment connected to O) will be described as a comparison line segment (L2).

That is, the rotation amount calculating unit 300 generates a virtual right-angled triangle having the comparison line segment L2 as the hypotenuse, and the reference line segment L1 as the base side, and uses a sine function to compare the reference line segment L1 with the comparison line. The internal angle of the minute L2 can be calculated as the rotational angle of the vertebral body. This is expressed by the following equation.

Here, the length of the comparison line segment L2 set to the hypotenuse is the center of the vertebral body as the center point O, and is equal to the length of the radius r of the circle having the width of the vertebral body as the diameter, and the height is the second parameter (a). It is equal to the length minus the radius. Accordingly, Equation 1 may be converted into Equation 2 or Equation 3 below.

At this time, since the width 2r of the vertebral body is the same as the first parameter b set by the parameter setting unit 200, the length of the radius r is equal to 1/2 the size of the first parameter b. Therefore, Equations 2 and 3 can be converted as follows.

In conclusion, in Equation 4 above, the rotation angle of the vertebral body is expressed as the first parameter (b) and the second parameter (a).

That is, the rotation amount calculating unit 300 may calculate the rotation angle θ of the vertebral body by inputting the first parameter (b) and the second parameter (a) measured in Equation (5).

On the other hand, as shown in the above equation, the rotation amount calculating unit 300 may calculate the rotation angle of the vertebral body using a sine function.

At this time, the rotation amount calculating unit 300 may calculate the rotation angle of the vertebral body using other trigonometric functions such as cosine, tangent, etc., but the vertebral body generally rotates at an angle of 0° to 90°, compared to the sine of the cosine tangent. Because of the nature of the function, the amount of change from 0° to 90° is larger than other trigonometric functions, so if the rotation angle is expressed as a sine function, the rotation angle of the vertebral body can be more accurately expressed. Therefore, the rotation amount calculating unit 300 according to the present invention may calculate the rotation angle from the first parameter b and the second parameter a using a sine function.

7 is a flowchart illustrating a schematic flow of a method for measuring vertebral body rotation according to an embodiment of the present invention.

The method for measuring vertebral body rotation according to the present invention can be performed by the vertebral body rotation measuring device 1 shown in FIG. 1, and the vertebral body rotation measuring device 1 performs each step constituting the vertebral body rotation measuring method described later. The software for the application (application) may be installed in advance.

The vertebral body rotation measuring apparatus 1 may collect a photographed image of a vertebral body and a pair of pedicles formed on the vertebral body (710 ).

The vertebral body rotation measuring apparatus 1 may collect a radiograph generated by photographing a user's vertebral body in a predetermined direction as a captured image, and such a captured image may show a state of a pair of pedicles formed on the side and side portions of the vertebral body. Can. The vertebral body rotation measuring apparatus 1 may collect a captured image from an external device or generate a captured image itself.

The vertebral body rotation measuring apparatus 1 may analyze collected images and set parameters for detecting the amount of rotation of the vertebral body (720).

Specifically, the vertebral body rotation measuring apparatus 1 measures the width of the vertebral body displayed on the captured image and sets it as the first parameter (b), and measures the separation distance between a pair of pedicles to determine the vertebral body from the midpoint of the separation distance. The distance to one side can be set as the second parameter (a).

Thereafter, the vertebral body rotation measuring apparatus 1 may calculate the rotational angle of the vertebral body based on the set parameter (730).

The vertebral body rotation measuring apparatus 1 may express the ratio of the second parameter (a) to the first parameter (b) as a sine function, and determine the angle (θ) of the expressed sine function as the rotational angle of the vertebral body. have. Since detailed contents related to this have been described above, repeated description will be omitted.

As described above, the technology for providing a method for measuring the rotation of the vertebral body may be implemented as an application or may be recorded in a computer-readable recording medium by being implemented in the form of program instructions that can be executed through various computer components. The computer-readable recording medium may include program instructions, data files, data structures, or the like alone or in combination.

The program instructions recorded on the computer-readable recording medium are specially designed and configured for the present invention, and may be known and available to those skilled in the computer software field.

Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media), and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

Examples of program instructions include not only machine language codes produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform processing according to the present invention, and vice versa.

Although described above with reference to embodiments, those skilled in the art understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Will be able to.

1: vertebral body rotation measuring device
100: spine image collection unit
200: parameter setting unit
300: rotation amount calculation unit

Claims (15)

A vertebral body image collecting unit configured to collect a vertebral body and a pair of pedicle images taken on the vertebral body;
A parameter setting unit configured to measure a width of the vertebral body and a separation distance between the pair of pedicles and set parameters for detecting the amount of rotation of the vertebral body; And
And a rotation amount calculator configured to calculate a rotation angle of the vertebral body based on the set parameters.
The method of claim 1, wherein the parameter setting unit,
A vertebral body rotation measuring apparatus that sets the measured width of the vertebral body as a first parameter and sets the length from the midpoint of the separation distance to the left or right side of the vertebral body as a second parameter.
According to claim 2, The rotation amount calculating unit,
A vertebral body rotation measuring apparatus for calculating a rotation angle of the vertebral body according to a ratio of the second parameter to the first parameter.
The method of claim 2, wherein the parameter setting unit,
Create a circle with the center of the vertebral body as the center, and the width of the vertebral body as the diameter,
On a line segment connecting both ends of the diameter, a first normal line passing through the midpoint is set as a reference line segment,
A vertebral body rotation measuring apparatus for generating a comparison segment connecting the midpoint from an intersection point of a first normal passing through a point spaced apart by the second parameter from any one end point of the diameter.
According to claim 4, The rotation amount calculating unit,
A vertebral body rotation measuring device for calculating the internal angle of the reference line segment and the comparative segment in the rotational angle of the vertebral body.
According to claim 5, The rotation amount calculating unit,
A vertebral body rotation measurement for generating a virtual right-angled triangle having the comparative segment as the hypotenuse, the reference segment as the base, and calculating the inner angle between the reference segment and the comparative segment using a sine function as the rotation angle of the vertebral body Device.
According to claim 1, The spine image collection unit,
A device for measuring vertebral body rotation by photographing the vertebral body in a predetermined direction and collecting radiographic images of a pair of pedicles formed on the lateral portion of the vertebral body and the lateral portion of the vertebral body as the captured image.
A method of measuring vertebral body rotation performed by a vertebral body rotation measuring device,
Collect a vertebral body and a pair of vertebrae formed photographed image formed on the vertebral body,
The width of the vertebral body and the distance between the pair of pedicles are measured to set parameters for detecting the amount of rotation of the vertebral body,
A method of measuring vertebral body rotation based on calculating the rotation angle of the vertebral body based on the set parameter.
The method of claim 8, wherein setting the parameter,
A method of measuring vertebral body rotation, wherein the measured width of the vertebral body is set as a first parameter, and the length from the midpoint of the separation distance to the left or right side of the vertebral body is set as a second parameter.
The method of claim 9, wherein calculating the rotation angle of the vertebral body,
A method of measuring vertebral body rotation, wherein a rotation angle of the vertebral body is calculated according to a ratio of the second parameter to the first parameter.
The method of claim 9, wherein setting the parameter,
Create a circle with the center of the vertebral body as the center, and the width of the vertebral body as the diameter,
On a line segment connecting both end points of the diameter, a first normal line passing through the midpoint is set as a reference line segment,
A method of measuring vertebral body rotation, wherein the first segment passing through a point spaced apart by the second parameter from any one end point of the diameter and a comparison line segment connecting the midpoint from an intersection point of the circle intersect.
The method of claim 11, wherein calculating the rotation angle of the vertebral body,
A method for measuring the rotation of a vertebral body, wherein the internal angle of the reference line segment and the comparative segment is calculated as a rotation angle of the vertebral body.
The method of claim 12, wherein calculating the rotation angle of the vertebral body,
A vertebral body that generates a virtual right-angled triangle having the comparative segment as the hypotenuse and the reference segment as the base, and calculates the inner angle between the reference segment and the comparative segment using a sine function as the rotation angle of the vertebral body. How to measure rotation.
According to claim 8, Collecting the photographed image,
A method of measuring vertebral body rotation, wherein the vertebral body is photographed in a predetermined direction to collect radiographs of a pair of pedicles formed on a side portion of the vertebral body and a side portion of the vertebral body as the captured image.
15. A computer-readable recording medium having a computer program recorded thereon for performing the method of measuring spinal body rotation according to any one of claims 8 to 14.

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