JP2005136726A - Device, system, and method for displaying thee-dimensional image, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional image displaying device capable of displaying an accurate scale at a desired part in a three-dimensional image; and to provide a three-dimensional image display system, a three-dimensional display method, and a program. <P>SOLUTION: Based on a parallax original image for left and right eyes obtained from an object, display is made so that the image light of a parallax image for left eyes including an index for left eyes and a parallax image for right eyes including an index for right eyes separately are incident on each eye of an observer, thus allowing the observer to perform the stereoscopic vision of a three-dimensional image including a three-dimensional index based on the parallax of the indexes of left and right eyes from the parallax of the parallax images for left and right eyes. After that, a position in the object corresponding to the position of the three-dimensional index specified based on each position of the indexes for left and right eyes is obtained, and a scale value in the three-dimensional image is calculated from the scale value of actual dimensions at the position in the object. Then, scales for left and right eyes according to the scale value are included into the parallax images for left and right eyes each for displaying, thus displaying a three-dimensional scale in the three-dimensional image. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stereoscopic image display apparatus, a stereoscopic image display system, a stereoscopic image display method, and a stereoscopic image display apparatus suitable for a medical stereoscopic image display apparatus that stereoscopically displays a medical image of a diagnostic apparatus such as a stereo X-ray diagnostic apparatus, CT scan apparatus, and MRI apparatus. Regarding the program.

  Conventionally, stereo X-rays can be obtained in which a stereo X-ray image of a subject such as a human body is acquired by alternately irradiating X-rays from two X-ray sources for stereo to stereoscopically view the X-ray image of the subject. Diagnostic devices are known. This type of stereo X-ray diagnostic apparatus is effective for grasping complicated blood vessel running in the diagnosis of the circulatory system, and the obtained three-dimensional image is used for surgery for inserting a catheter into the blood vessel and performing treatment. It is used.

  In addition, when performing actual diagnosis or treatment based on the obtained stereoscopic image, the accurate size and distance of the target region of the subject may be required. In such a case, conventionally, as shown in FIG. 11, a method of measuring a size of a region of interest in the stereoscopic image 103 by displaying a fixed scale 102 on a part of the screen 101 of the stereoscopic display, A method is employed in which two points a and b to be measured are designated by a three-dimensional cursor and the distances are calculated (see Patent Document 1).

  However, the fixed scale 102 displayed on the screen is often separated from the target portion and the scale 102 on the screen 101 when viewed stereoscopically, and it is difficult to directly compare these. Cannot be read. Further, depending on the position in the depth direction in the stereoscopic image 103, a scale shift may occur, and the scale 102 may not be applied as it is.

  Also, in the method of measuring the distance by specifying two points in the stereoscopic image with the stereoscopic cursor, it is necessary to respecify each one when measuring a large number of dimensions in the vicinity of the site of interest, and the operation is troublesome.

JP 2001-42259 A

  It is an object of the present invention to provide a stereoscopic image display device, a stereoscopic image display system, a stereoscopic image display method, and a program that can display an accurate scale at a desired part of a stereoscopic image.

  As a result of intensive studies to solve the above problems, the present inventor has come up with various aspects of the invention described below.

  The first stereoscopic image display device according to the present invention is based on a left-eye parallax original image and a right-eye parallax original image obtained from a subject, and a left-eye parallax image and a right-eye parallax image including a left-eye index. By alternately displaying parallax images for the right eye including an index, the parallax of the index for the left eye and the index for the right eye is obtained from the parallax of the parallax image for the left eye and the parallax image for the right eye for the observer. Obtaining a position in the subject corresponding to the position of the three-dimensional index determined based on each position of the left-eye index and the right-eye index; Calculating means for calculating a scale value in a stereoscopic image from a scale value of an actual size at a position in the subject, and the display means is for a left eye scale and a right eye scale corresponding to the scale value. The scale is divided into the left-eye parallax image and the right-eye view, respectively. By displaying included in the image, characterized in that the inclusion of three-dimensional scale to the three-dimensional image.

  A second stereoscopic image display device according to the present invention is a stereoscopic image display device for inputting a medical image having parallax to the left and right eyes of an observer and causing the observer to stereoscopically view the stereoscopic image on the display screen of the medical image. On the image, a stereoscopic index having parallax for each of the left and right eyes of the observer is aligned with a specific part, and an input means for inputting the position of the stereoscopic index, and a position of the stereoscopic index on the display screen input by the input means A calculation unit for calculating a scale value on the display screen from a scale value of an actual dimension of the subject at the point, and a three-dimensional image on the display screen of the medical image. And display means for displaying a three-dimensional scale based on the scale value obtained by the calculation means at the three-dimensional index position input by the input means on the image.

  A stereoscopic image display system according to the present invention includes any one of the stereoscopic image display devices described above, an irradiation unit that irradiates the subject with electromagnetic waves, and a detection unit that detects the electromagnetic waves transmitted through the subject. And

  A first stereoscopic image display method according to the present invention is based on a left-eye parallax original image and a right-eye parallax original image obtained from a subject, and a left-eye parallax image and a right-eye parallax image including a left-eye index. The parallax between the parallax image for the left eye and the parallax image for the right eye is displayed to the observer by displaying the image light of the parallax image for the right eye including the index so as to be incident on each eye of the observer separately. From the index display step for stereoscopically viewing a stereoscopic image including a stereoscopic index based on the parallax of the left-eye index and the right-eye index, and the position determined based on each position of the left-eye index and the right-eye index A calculation step of obtaining a position in the subject corresponding to the position of the stereoscopic index, calculating a scale value in the stereoscopic image from a scale value of an actual dimension at the position in the subject, and a left eye corresponding to the scale value Scale for right eye and scale for right eye, respectively By displaying included in eye parallax image and the right-eye parallax image, and having a three-dimensional scale display step of displaying a stereoscopic scale in said stereoscopic image.

  A second stereoscopic image display method according to the present invention is a stereoscopic image display method in which a medical image having a parallax is input to each of the left and right eyes of an observer to cause the observer to stereoscopically view the stereoscopic image on the display screen of the medical image. On the image, an input step for aligning a stereo index having parallax for each of the left and right eyes of the observer with a specific part and inputting the position of the stereo index, and the position of the stereo index on the display screen input in the input step A calculation step for calculating a point on the display screen from a scale value of an actual size of the subject at the point, and a three-dimensional image on the display screen of the medical image. A display step for displaying a three-dimensional scale based on the scale value obtained in the calculation step at the three-dimensional index position input in the input step on the image. .

  The first program according to the present invention includes a left-eye parallax image including a left-eye index and a right-eye index based on a left-eye parallax original image and a right-eye parallax original image obtained from a subject. The parallax of the parallax image for the left eye and the parallax image for the right eye is displayed to the observer by causing the display device to display the image light of the parallax image for the right eye so as to be incident on each eye of the observer separately. The index display processing for stereoscopically viewing a stereoscopic image including a stereoscopic index based on the parallax of the left-eye index and the right-eye index, and the position determined based on each position of the left-eye index and the right-eye index A calculation process for obtaining a position in the subject corresponding to the position of the stereoscopic index, calculating a scale value in the stereoscopic image from a scale value of an actual dimension at the position in the subject, and a left eye corresponding to the scale value Scale for the right eye and scale for the right eye, respectively By use parallax images and included in the right eye parallax image to be displayed on the display device, characterized in that to execute a three-dimensional scale display process for displaying a stereoscopic scale within said three-dimensional image, to the computer.

  A second program according to the present invention is a program for inputting a medical image having parallax to the left and right eyes of an observer to a computer and causing the observer to stereoscopically view the stereoscopic image on the display screen of the medical image. , Corresponding to the position of the three-dimensional index on the display screen input in the input process, by matching the three-dimensional index having parallax to the left and right eyes of the observer with a specific part and inputting the position of the three-dimensional index A point is obtained on the original image of the medical image, and a calculation process for calculating the scale value on the display screen from the scale value of the actual size of the subject at the point, and on the stereoscopic image on the display screen of the medical image And causing the computer to execute a display process for displaying a three-dimensional scale based on the scale value obtained in the calculation step at the three-dimensional index position input in the input process. That.

  According to the present invention, since an accurate scale value at a desired position in a stereoscopic image can be obtained, an accurate stereoscopic scale can be displayed at that position. Therefore, it is possible to accurately measure the dimension of the attention site. In addition, when the three-dimensional scale is configured to be freely moved within the scale display plane, the dimensions and the like can be measured easily and accurately even at a part separated from the target part.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a configuration of a medical stereoscopic image display system according to an embodiment of the present invention.

  In the present embodiment, the X-ray imaging sensor 2 and the stereo X-ray source 3 are disposed to face each other, and a subject (subject) 1 such as a human body is disposed between them. The X-ray imaging sensor 2 includes, for example, an image intensifier (II) or a flat panel. The stereo X-ray source 3 includes, for example, a stereo tube, or two X-ray tubes arranged side by side. In the present embodiment, an X-ray control circuit 4 that controls the operation of the stereo X-ray source 3, an A / D conversion circuit 7 that converts an analog signal output from the X-ray imaging sensor 2 into a digital signal, A CPU that reads out the X-ray parallax original image information from the image memory 6 while outputting a command to the image memory 6 that stores the digital signal output from the D conversion circuit 7 as X-ray parallax original image information and the X-ray control circuit 4 (Central processing unit) 5 is provided.

  Furthermore, a three-dimensional display 10 is connected to the CPU 5. On the stereoscopic display 10, the parallax image for the left eye 21L and the parallax image for the right eye 21R are alternately displayed in a time division manner. When an observer such as a doctor observes the stereoscopic display 10 through the polarized glasses 8, it looks as if the stereoscopic image 9 is projected by the operation described below. In the present embodiment, a stereoscopic image display device is configured by the CPU 5 and the stereoscopic display 10.

  Here, the basic operation of the medical stereoscopic image display apparatus according to the present embodiment will be described. The control CPU 5 causes the X-ray control circuit 4 to start controlling the stereo X-ray source 3 when an instruction to perform stereo imaging is given from a control panel (not shown). The X-ray control circuit 4 causes the stereo X-ray source 3 to irradiate the subject 1 with X-rays alternately from the left and right. As a result, X-ray parallax original images (left-eye parallax original image and right-eye parallax original image) of the left and right viewpoints of the subject 1 are alternately projected on the X-ray imaging sensor 2. The X-ray imaging sensor 2 captures a video signal in synchronization with the irradiation of the stereo X-ray source 3 and stores the X-ray parallax original image information in the image memory 6 through the A / D conversion circuit 7. Thereafter, the CPU 5 reads out the X-ray parallax original image information stored in the image memory 6, transfers it to the stereoscopic display 10, and controls the operation of the stereoscopic display 10.

  The stereoscopic display 10 is provided with a polarization shutter that electrically switches the polarization direction alternately in the orthogonal direction on the front surface of the screen. When the stereoscopic display 10 receives the X-ray parallax original image information, the stereoscopic display 10 alternately displays the parallax image for the left eye and the parallax image for the right eye, and switches the polarization direction in synchronization therewith. As a result, if the observer wears polarized glasses 8, he can see only the left image with the left eye and the right image with the right eye, and can stereoscopically view the stereoscopic image 9 with the parallax of these images. . The switching frequency of the left and right images is set high, for example, about 120 Hz so that the flicker is reduced.

  Next, a system and method for displaying a three-dimensional scale used when measuring the size or the like of a region of interest in the three-dimensional image 9 that can be observed as described above will be described. FIG. 2 is a flowchart illustrating a method for displaying a scale.

  The CPU 5 alternately displays the left-eye parallax image and the right-eye parallax image on the screen 11 of the stereoscopic display 10 as described above. At this time, a cursor (left eye index) 18 is displayed in the parallax image for the left eye as shown in FIG. 3, and the cursor is shown in the parallax image for the right eye as shown in FIG. (Right-eye index) 19 is displayed. As a result, as shown in FIG. 5, a stereoscopic cursor (stereoscopic index) 17 is displayed in the stereoscopic image 9 based on the positions of the cursors 18 and 19 (step S1). The three-dimensional cursor 17 is a three-dimensional view of the cursors 18 and 19.

  Note that the size of the parallax image for the left and right eyes displayed on the screen 11 of the stereoscopic display 10 does not necessarily match the size of the original X-ray image on the X-ray imaging sensor 2 and is appropriately observed. The image is enlarged or reduced to a size suitable for the image.

  When the horizontal direction of the screen 11 is the x-axis direction, the vertical direction is the y-axis direction, and the direction perpendicular to the screen 11 is the z-direction, the position of the three-dimensional cursor 17 on the xy plane is the position of the cursors 18 and 19. Become the center. The interval between the cursors 18 and 19 is parallax, and the position in the z direction is also determined based on this parallax.

  The CPU 5 is included in the information processing device 16 shown in FIGS. 3 to 5, and a mouse 15 is connected to the information processing device 16 as a position indicating device. The observer can move the three-dimensional cursor 17 three-dimensionally by operating the mouse 15 while viewing the three-dimensional image 9.

  The observer can freely select a target region from the stereoscopic image 9, and the observer gives a position determination instruction by clicking or the like when the three-dimensional cursor 17 is positioned at the selected target region (step S2).

  When the CPU 5 receives the position determination instruction from the observer, as shown in FIG. 6, the coordinates (x1, y1) of the cursor 18 on the parallax image for the left eye 21L and the cursor 19 on the parallax image for the right eye 21R, as shown in FIG. Coordinates (x2, y2) are obtained (step S3).

  Next, the CPU 5 converts the two coordinates (x1, y1) and (x2, y2) on the screen 11 into coordinates (X1, Y1) and (X2, Y2) on the X-ray imaging sensor 2, respectively ( Step S4). Here, the x-axis, y-axis, and z-axis on the screen 11 correspond to the X-axis, Y-axis, and Z-axis on the X-ray imaging sensor 2, respectively, and the origin of the xy plane is the origin of the XY plane. It shall correspond to. Since the magnification K for displaying the actual X-ray original image on the X-ray imaging sensor 2 on the screen 11 of the stereoscopic display 10 is known, in such a case, the parallax images for the left and right eyes on the screen 11 are known. By dividing the coordinates (x1, y1) and (x2, y2) of the upper cursor position by the magnification K, the coordinates (X1, Y1) and (X2, Y2) of the cursor position on the parallax image of the X-ray original image are divided. Y2) is required.

  Next, the CPU 5 obtains a corresponding position on the subject 1 of the three-dimensional cursor 17 designated on the screen 11, and obtains a coordinate (Z coordinate) in the Z-axis direction (step S5).

Here, a method for obtaining the Z coordinate will be described. FIG. 7 is a schematic diagram illustrating a method for obtaining the Z coordinate of the position corresponding to the three-dimensional cursor 17. To determine the Z coordinate Z _a, distance between the left and right stereo X-ray source 3 B, and the value of the distance S from the stereo X-ray source 3 of the bulb to the X-ray image sensor 2 is required. If the interval B and the distance S is given, from the geometrical conditions, Z coordinates Z _a is expressed by the following Equation 1. However, “Y1 = Y2” holds here.

CPU5 is, Z after obtaining the coordinate Z _a, the unit scale values in the actual position of the subject in one corresponding to a target site in the three-dimensional image 9 S / in (S-Za) multiplying that, stereo X-ray The X-ray original image is converted into a scale value on the parallax image (X-ray imaging sensor 2) from the imaging conditions (step S6).

  Next, the CPU 5 multiplies the scale value on the parallax image of the X-ray original image by the magnification K when displaying the X-ray original image on the screen 11 of the stereoscopic display 10, thereby Is converted into a scale value on the parallax images for the left and right eyes displayed on the screen 11 (step S7).

  In this way, a scale value corresponding to the depth of the site of interest selected by the observer is obtained. That is, the position of the target region designated on the screen 11 of the stereoscopic display 10 corresponds to which position of the actual subject 1 imaged by the X-ray imaging sensor 2 by the processing of step S3 to step S7. The size of the unit scale value at the position on the stereoscopic display 10 screen 11 is obtained.

  Thereafter, the CPU 5 causes the stereoscopic display 10 to display the stereoscopic scale by displaying the scale for the left eye and the scale for the right eye of the calculated scale value at the cursor position on the parallax image for the left and right eyes ( Step S8).

  By a series of these processes, as shown in FIG. 8, a three-dimensional scale 14 having a scale value suitable for the depth is displayed at the attention site 13 in the three-dimensional image 9. As a result, the observer can accurately read the size in the vicinity of the site of interest 13 using the three-dimensional scale 14.

  As shown in FIG. 9, the three-dimensional scale 14 can be freely moved by an operation using the mouse 15 in a plane parallel to the xy plane including the target region designated using the three-dimensional cursor 17. It may be. By adopting such a configuration, not only in the vicinity of the site of interest but also in a portion separated from the site of interest, the dimensions and the like can be easily measured within the same plane.

  Further, as shown in FIG. 10, a display window (window) 71 for displaying the relative position (depth) in the Z-axis direction of the subject 1 corresponding to any two points in the stereoscopic image 9 is displayed on the screen 11. May be displayed. The relative position is calculated by, for example, calculating the relative position in the depth direction in the subject 1 corresponding to the position of the three-dimensional cursor 17 with the position in the subject 1 corresponding to the position of the three-dimensional scale 14 as a reference. It can be obtained by providing means. That is, if the solid scale 14 is displayed on one point as an attention site and then the solid cursor 17 is moved to the other point, the relative position is calculated by the relative position calculation means. The Z coordinate corresponding to the z coordinate of a plane parallel to the xy plane on which the three-dimensional scale 14 is displayed has already been obtained by the above-described processing. Further, the Z coordinate corresponding to the position of the three-dimensional cursor 17 after the movement can be easily obtained in the same manner as the above-described processing. Accordingly, the relative position in the Z-axis direction within the subject 1 can be easily obtained. By providing such a display window 71, it is possible to easily grasp the depth coordinates in the vicinity of the site of interest displaying the three-dimensional scale 14, and to accurately grasp the three-dimensional dimensions.

  Note that FIG. 10 shows an example in which the relative position is displayed on the display window 71 with positive and negative distinctions, but instead of the relative position, a distance (absolute value) may be simply displayed.

  In addition to the stereo X-ray diagnostic apparatus, stereoscopic display is performed using parallax images projected in stereo from a three-dimensional model reconstructed by a CT scanning apparatus (Computed Tomography Scanners) or an MRI (Magnetic Resonance Imaging) apparatus. It is also possible to display a similar three-dimensional scale.

  The displayed image is not limited to a medical image. The stereoscopic image display device is not limited to the polarized glasses method, and may be a stereoscopic image display device such as a glassesless stereoscopic display or a head-mounted display (HMD) using a lenticular lens or a parallax barrier.

  The embodiment of the present invention can be realized by, for example, a computer executing a program. Also, means for supplying a program to a computer, for example, a computer-readable recording medium such as a CD-ROM recording such a program, or a transmission medium such as the Internet for transmitting such a program is also applied as an embodiment of the present invention. Can do. The above program can also be applied as an embodiment of the present invention. The above program, recording medium, transmission medium, and program product are included in the scope of the present invention.

It is a schematic diagram which shows the structure of the medical stereoscopic image display system which concerns on embodiment of this invention. It is a flowchart which shows the method of displaying a scale. It is a schematic diagram which shows the cursor (index for left eyes) displayed in the parallax image for left eyes. It is a schematic diagram which shows the cursor (index for right eyes) displayed in the parallax image for right eyes. It is a schematic diagram which shows the three-dimensional cursor displayed in a three-dimensional image. It is a schematic diagram which shows the coordinate of the cursor on the parallax image displayed on the screen. It is a schematic diagram which shows the method of calculating | requiring the Z coordinate of the position corresponding to a solid cursor. It is a schematic diagram which shows the three-dimensional scale displayed in a three-dimensional image. It is a schematic diagram which shows the parallel movement of a three-dimensional scale. It is a schematic diagram which shows the display method of the relative position of a depth direction. It is a schematic diagram which shows the measuring method of the conventional dimension.

Explanation of symbols

1: Subject 2: X-ray imaging sensor 3: Stereo X-ray source 4: X-ray control circuit 5: CPU
6: Image memory 7: A / D conversion circuit 8: Polarized glasses 9: Stereo image 10: Stereo display 11: Screen 15: Mouse 16: Information processing device 17: Stereo cursor 18, 19: Cursor 21L: Left eye 21R: Right Eye 71: Display window

Claims (10)

Based on the left-eye parallax original image and the right-eye parallax original image obtained from the subject, the image light of the left-eye parallax image including the left-eye index and the right-eye parallax image including the right-eye index is observed. By displaying so as to be separately incident on each eye of the person, the left eye index and the right eye index are obtained from the parallax of the parallax image for the left eye and the parallax image for the right eye. Display means for stereoscopically viewing a stereoscopic image including a stereoscopic index based on parallax;
A position in the subject corresponding to the position of the three-dimensional index determined based on the positions of the left-eye index and the right-eye index is obtained, and a three-dimensional image is obtained from a scale value of an actual size at the position in the subject. A computing means for computing the scale value at
Have
The display means displays the scale for the left eye and the scale for the right eye corresponding to the scale value in the left-eye parallax image and the right-eye parallax image, respectively, thereby displaying the stereoscopic scale in the stereoscopic image. A stereoscopic image display device characterized in that the stereoscopic image display device is included.   The stereoscopic image display apparatus according to claim 1, further comprising index moving means for moving the left-eye index and the right-eye index in the left-eye parallax image and the right-eye parallax image, respectively. In a stereoscopic image display device for inputting a medical image having parallax to the left and right eyes of an observer and causing the observer to stereoscopically view the image,
On the stereoscopic image on the display screen of the medical image, an input means for matching a stereoscopic index having parallax to the left and right eyes of the observer with a specific part and inputting the position of the stereoscopic index;
A point corresponding to the position of the solid index on the display screen input by the input means is obtained on the original image of the medical image, and the scale value on the display screen from the scale value of the actual size of the subject at that point Computing means for computing
Display means for displaying a stereoscopic scale based on the scale value obtained by the computing means at the stereoscopic index position inputted by the input means on the stereoscopic image on the display screen of the medical image;
A stereoscopic image display device comprising:   The stereoscopic image display apparatus according to any one of claims 1 to 3, further comprising scale moving means for moving the position of the stereoscopic scale while maintaining a position in the depth direction in the stereoscopic image.   A relative position obtained by calculating a relative position in the depth direction in the subject corresponding to the position of the stereoscopic index in the stereoscopic image with reference to the position in the subject corresponding to the position of the stereoscopic scale in the stereoscopic image. 5. The stereoscopic image display device according to claim 1, further comprising a calculation unit. A stereoscopic image display device according to any one of claims 1 to 5,
Irradiation means for irradiating the subject with electromagnetic waves;
Detecting means for detecting electromagnetic waves transmitted through the subject;
A stereoscopic image display system comprising: Based on the left-eye parallax original image and the right-eye parallax original image obtained from the subject, the image light of the left-eye parallax image including the left-eye index and the right-eye parallax image including the right-eye index is observed. By displaying so as to be separately incident on each eye of the person, the left eye index and the right eye index are obtained from the parallax of the parallax image for the left eye and the parallax image for the right eye. An index display step for stereoscopically viewing a stereoscopic image including a stereoscopic index based on parallax;
A position in the subject corresponding to the position of the three-dimensional index determined based on the positions of the left-eye index and the right-eye index is obtained, and a three-dimensional image is obtained from a scale value of an actual size at the position in the subject. A calculation step for calculating the scale value at
A three-dimensional image that displays a three-dimensional scale in the three-dimensional image by displaying a left-eye scale and a right-eye scale corresponding to the scale value in the left-eye parallax image and the right-eye parallax image, respectively. A scale display step;
A stereoscopic image display method characterized by comprising: In a stereoscopic image display method for inputting a medical image having parallax to the left and right eyes of an observer and causing the observer to stereoscopically view,
On the stereoscopic image on the display screen of the medical image, an input step of matching a stereoscopic index having parallax to the left and right eyes of the observer with a specific part and inputting the position of the stereoscopic index;
A point corresponding to the position of the three-dimensional index on the display screen input in the input step is obtained on the original image of the medical image, and the scale value on the display screen from the scale value of the actual size of the subject at that point A calculation step for calculating
On the stereoscopic image on the display screen of the medical image, a display step of displaying a stereoscopic scale based on the scale value obtained in the calculating step at the stereoscopic index position input in the input step;
A stereoscopic image display method characterized by comprising: Based on the left-eye parallax original image and the right-eye parallax original image obtained from the subject, the image light of the left-eye parallax image including the left-eye index and the right-eye parallax image including the right-eye index is observed. By displaying on the display device so as to be separately incident on each eye of the person, the left eye index and the right eye are obtained from the parallax of the left eye parallax image and the right eye parallax image. Index display processing for stereoscopically viewing a stereoscopic image including a stereoscopic index based on the parallax of the index for use;
A position in the subject corresponding to the position of the three-dimensional index determined based on the positions of the left-eye index and the right-eye index is obtained, and a three-dimensional image is obtained from a scale value of an actual size at the position in the subject. Processing to calculate the scale value at
A left-eye scale and a right-eye scale corresponding to the scale value are included in the left-eye parallax image and the right-eye parallax image, respectively, and displayed on the display device, whereby a stereoscopic scale is displayed in the stereoscopic image. 3D scale display processing to be displayed on
A program that causes a computer to execute. In a program for inputting a medical image having parallax to the left and right eyes of an observer into a computer and causing the observer to stereoscopically view the image,
On the stereoscopic image on the display screen of the medical image, an input process for matching a stereoscopic index having parallax to the left and right eyes of the observer with a specific part and inputting the position of the stereoscopic index;
A point corresponding to the position of the three-dimensional index on the display screen input in the input process is obtained on the original image of the medical image, and the scale value on the display screen is obtained from the scale value of the actual size of the subject at that point. Arithmetic processing for calculating
Display processing for displaying a three-dimensional scale based on the scale value obtained in the calculation step at the three-dimensional index position input in the input processing on the three-dimensional image on the display screen of the medical image;
A program that causes a computer to execute.

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