JP2012253757A - Stereoscopic image display device and operation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress an increase in fatigue by detecting an observer's fatigue by a simple device configuration and process in sequentially observing plural stereoscopic images in a stereoscopic image display device.SOLUTION: When an input unit 42 receives a user instruction to display a next stereoscopic image G while a stereoscopic image G is displayed, a display control unit 433 displays the next stereoscopic image G on the basis of the user instruction. A display time determination unit 435 measures a display time for each stereoscopic image G, and the display time determination unit 435 determines whether the display time is within a predetermined time. A warning unit 436 issues a warning by screen display and/or sound when the display time exceeds the predetermined time.

Description

  The present invention relates to a stereoscopic image display apparatus and an operation method thereof. More specifically, the present invention relates to a stereoscopic image display apparatus that displays a stereoscopic image of a subject using two pieces of radiographic image data obtained by radiographing the subject from two different photographing directions, and an operation method thereof.

  Conventionally, it is known that stereoscopic viewing is possible by combining and displaying two images having parallax. Such a stereoscopically viewable image (hereinafter referred to as a stereoscopic image) is displayed based on two pieces of image data with parallax obtained by photographing the same subject from two different photographing directions. Such generation of stereoscopic images is used not only in the fields of digital cameras and televisions, but also in the field of radiography.

  That is, the subject is irradiated with radiation from two different imaging directions, and the radiation transmitted through the subject is detected by the radiation detector to obtain stereoscopic image data composed of two pieces of radiation image data having parallax. A stereoscopic image is displayed. By using such a stereoscopic image, it becomes possible to observe a radiographic image with a sense of depth, and diagnosis can be performed more easily.

  By the way, such stereoscopic viewing of a stereoscopic image is performed by synthesizing two images having parallax with each other in the brain and recognizing it as a stereoscopic image. Therefore, the observer tends to feel fatigue because the stereoscopic image is stereoscopically viewed while suppressing the phenomenon of perceiving different visual images with both eyes (the binocular rivalry). In particular, when an observer sequentially observes a plurality of stereoscopic images, it is necessary to perform a new synthesis in the brain every time a stereoscopic image is displayed, which easily causes fatigue.

  Patent Document 1 proposes a stereoscopic image display device that detects observer fatigue by measuring observer information such as a blink of an observer and a pupil diameter, and adjusts the amount of parallax and the display size. . Further, in Patent Document 2, a cumulative intensity is calculated based on a stereoscopic intensity indicating the stereoscopic effect of each stereoscopic image and a display time, and a warning is displayed when the cumulative intensity exceeds a predetermined threshold. A visual image display device has been proposed.

JP 2004-289527 A JP 2004-207773 A

  However, in the technique proposed in Patent Document 1, it is necessary to acquire the observer's body information in order to detect the observer's fatigue, and the apparatus configuration may be complicated. Further, the technique proposed in Patent Document 2 requires a process for calculating the stereoscopic intensity for each stereoscopic image.

  By the way, generally, when an observer continues to observe a plurality of stereoscopic images sequentially and fatigue increases, the time for observing the stereoscopic image is the time for observing the previous stereoscopic image. There is a tendency to become extremely longer than.

  In view of the circumstances described above, an object of the present invention is to provide a stereoscopic image display device capable of detecting an observer's fatigue and suppressing an increase in fatigue with a simple device configuration and processing when sequentially observing a plurality of stereoscopic images and its operation. Provide a method.

  In order to solve the above-described problem, the stereoscopic image display apparatus of the present invention stores a plurality of stereoscopic image data composed of two radiographic image data obtained by radiographing a subject from two different imaging directions. An image data storage unit, a display unit that displays a stereoscopic image of the subject using one stereoscopic image data read from the image data storage unit, and a stereoscopic image of the next stereoscopic image during display of the stereoscopic image. An instruction receiving unit that receives a user instruction to display, a display control unit that controls the display unit so that the display unit displays the next stereoscopic image based on the user instruction, and each stereoscopic image A display time measuring unit for measuring the display time, a display time determining unit for determining whether or not the display time is within the predetermined time, and a screen display and / or an audio warning when the display time exceeds the predetermined time Emit Characterized in that it includes a warning section.

  An operation method of a stereoscopic image display apparatus according to the present invention includes an image data storage unit that stores a plurality of stereoscopic image data including two radiographic image data obtained by radiographing a subject from two different imaging directions. An operation method of a stereoscopic image display apparatus including a display unit that displays a stereoscopic image of a subject using one stereoscopic image data read from an image data storage unit, and displaying a stereoscopic image Next, a user instruction to display the next stereoscopic image is received, the next stereoscopic image is displayed based on the user instruction, the display time is measured for each stereoscopic image, and the display time is within a predetermined time. And when the display time exceeds the predetermined time, a screen display and / or a sound warning is issued.

  Here, the “subject” in the stereoscopic image display apparatus and the operation method of the present invention is not limited to the same subject, but includes different subjects.

  In the stereoscopic image display apparatus according to the present invention, the stereoscopic image data includes the imaging region information of the subject, and the display time determination unit sets a predetermined time based on the imaging region information. There may be. Here, “imaging part information” means information indicating a part to be photographed by the subject, such as the head, neck, chest, abdomen, legs, stomach, lungs or breast.

  In the stereoscopic image display apparatus according to the present invention, the instruction receiving unit may invalidate a user instruction that is subsequently received when the display time exceeds a predetermined time. In the stereoscopic image display device of the present invention, the display control unit controls the display unit so that the displayed stereoscopic image is not displayed when the display time exceeds the predetermined time. Also good.

  Further, in the stereoscopic image display device of the present invention, the instruction receiving unit receives instructions for stopping and restarting the measurement of the display time. When the instruction for stopping the measurement is received, the display time measuring unit The measurement of the display time may be stopped until an instruction for resuming is received.

  According to the stereoscopic image display apparatus and its operation method of the present invention, image data for storing a plurality of stereoscopic image data composed of two radiographic image data obtained by radiographing a subject from two different imaging directions. A storage unit, and a display unit that displays a stereoscopic image of the subject using one stereoscopic image data read from the image data storage unit, and the instruction receiving unit displays the following during the display of the stereoscopic image: A user instruction to display the stereoscopic image is received, the display control unit displays the next stereoscopic image based on the user instruction, the display time measuring unit measures the display time for each stereoscopic image, and the display time The discriminating unit discriminates whether or not the display time is within a predetermined time, and if the display unit exceeds the predetermined time, the warning unit issues a warning by either screen display and audio or screen display and audio. It can suppress fatigue increased by detecting fatigue of the viewer with a simple apparatus configuration and processing for determining whether it is within a predetermined time by measuring the display time for each stereoscopic image.

  Further, according to the stereoscopic image display apparatus of the present invention, the stereoscopic image data is accompanied by the imaging part information of the subject, and the display time determination unit sets a predetermined time based on the imaging part information. Accordingly, it is possible to detect an observer's fatigue and suppress an increase in fatigue while taking into consideration that the ease of stereoscopic viewing differs depending on the imaging region to be observed.

  According to the stereoscopic image display device of the present invention, after the display time exceeds the predetermined time, the instruction receiving unit invalidates a user instruction that is subsequently received when the display time exceeds the predetermined time. It is possible to detect an observer's fatigue and prevent an increase in fatigue while avoiding the observation of the next stereoscopic image.

  Further, according to the stereoscopic image display apparatus of the present invention, the display control unit controls the display unit so that the displayed stereoscopic image is not displayed when the display time exceeds a predetermined time. Further, it is possible to detect an observer's fatigue and suppress an increase in fatigue while avoiding observation of a stereoscopic image being displayed after the display time exceeds a predetermined time.

  Further, according to the stereoscopic image display device of the present invention, the instruction receiving unit receives instructions for stopping and restarting measurement of the display time. When the instruction for stopping measurement is received, the display time measuring unit By stopping the measurement of the display time until an instruction to restart the measurement is received, the display time can be extended when necessary, or the observer's fatigue is detected without including the time when the observation is interrupted And increase in fatigue can be suppressed.

Schematic configuration diagram of radiographic imaging display system Partial side view of radiographic imaging display system Schematic configuration diagram of a stereoscopic image display device The flowchart which shows a series of processes regarding the continuous display of a stereoscopic vision image display apparatus.

  Hereinafter, a radiographic image display system using an embodiment of a stereoscopic image display apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a radiographic image capturing and displaying system 1. The radiographic image capturing and displaying system 1 acquires a stereoscopic image G composed of two radiographic images by radiographing a subject P from two different imaging directions, and displays the stereoscopic image G. As shown in FIG. 1, the radiographic image capturing and displaying system 1 displays a radiographic image capturing apparatus 10 that performs radiographic imaging of a subject P, a bed 30 that is a support base for supporting the subject P, and a stereoscopic image G of the subject P. It is comprised from the stereoscopic image display apparatus 40 to display.

  First, the radiation image capturing apparatus 10 will be described. The radiographic image capturing apparatus 10 performs stereo shooting by irradiating the subject P with radiation from two different shooting directions, acquires stereoscopic image data D of the subject P, and stores the stereoscopic image data D. The processed image file F is transmitted to the stereoscopic image display device 40.

  The radiographic imaging device 10 includes a radiation irradiation unit 11 that emits conical radiation, a radiation detection unit 12 that detects radiation emitted from the radiation irradiation unit 11, a radiation irradiation unit 11, and a radiation detection unit 12 at the end thereof. A C arm 13 that is provided facing each other, a rotation drive unit 14 that rotates the C arm 13, and an arm 15 that holds the rotation drive unit 14 are provided.

  The C-arm 13 is attached to the rotation drive unit 14 so as to be able to rotate 360 ° around the rotation axis C. The arm 15 includes a movable portion 16 and is held by a base 17 that is movably installed with respect to the ceiling. The C arm 13 can be moved to a wide range of positions in the photographing room by moving the base 17, and the axial direction of the rotation axis C can be changed by moving the movable portion 16 of the arm 15. It is configured. The rotation of the C arm 13 and the movement of the arm 15 are controlled by an arm controller 18 incorporated in the base 17.

  Inside the radiation detector 12, a radiation detector 19 such as a flat panel detector and a detector controller 20 that controls reading of a charge signal from the radiation detector 19 are provided. Further, inside the radiation detection unit 12, a charge amplifier that converts the charge signal read from the radiation detector 19 into a voltage signal, a correlated double sampling circuit that samples the voltage signal output from the charge amplifier, A circuit board or the like provided with an A / D conversion unit or the like for converting a voltage signal into a digital signal is also provided.

  The radiation detector 19 can repeatedly perform recording and reading of charge signals, and may use a so-called direct type radiation image detector that directly receives radiation to generate charges, A so-called indirect radiation image detector that converts radiation once into visible light and converts the visible light into a charge signal may be used.

  As a radiation image signal reading method, a radiation image signal is read by turning on / off a TFT (thin film transistor) switch, or a radiation image signal by irradiating reading light. Although it is desirable to use a so-called optical readout system in which is read out, the present invention is not limited to this, and other types may be used.

  A radiation source 21 and a radiation source controller 22 are provided inside the radiation irradiation unit 11. The radiation source controller 22 controls the timing of irradiating radiation from the radiation source 21 and the radiation generation conditions (tube current (mA), irradiation time (ms), tube voltage (kV), etc.) in the radiation source 21. is there.

  The computer 23 includes a central processing unit (CPU), a storage device such as a semiconductor memory, a hard disk, and an SSD, and an input unit 24. The computer 23 outputs predetermined control signals to the various controllers 18, 20, and 22 to control the entire radiographic image capturing apparatus 10. Then, the computer 23 stores in the image file F stereoscopic image data D obtained by performing predetermined signal processing on the charge signal detected by the radiation detector 19 by stereo imaging, and transmits it to the stereoscopic image display device 40. Is.

  The input unit 24 is composed of a pointing device such as a keyboard or a mouse, for example. The imaging unit such as the head, neck, chest, abdomen, legs, stomach, lungs or breast, or stereo imaging. It receives an input of shooting conditions including the angle θ and an instruction to start shooting.

  FIG. 2 is a partial side view of the radiographic imaging display system 1. In FIG. 2, for easy understanding, only the radiation irradiation unit 11, the radiation detection unit 12, the bed 30, and the subject P are displayed, and other displays are omitted.

  The operation of the radiation image capturing apparatus 10 will be described with reference to FIGS. 1 and 2. First, as shown in FIG. 1, the subject P is laid on the bed 30. The computer 23 is arranged so that the rotation axis C of the C arm 13 coincides with the approximate center of the body of the subject P, and the radiation source 21 and the radiation detection unit 12 are arranged at symmetrical positions with the rotation axis C interposed therebetween. A control signal for initial alignment is output to the controller 18.

  When the initial alignment of the C-arm 13 is performed, next, imaging part information is input from the input unit 24 by the photographer. The computer 23 has in advance a radiation generation condition table in which various imaging parts are associated with radiation generation conditions. In the radiation generation condition table, as described above, the tube current (mA), the irradiation time (ms), and the tube voltage (kV) as the radiation generation conditions are set for each imaging region.

  When the imaging part information is input from the input unit 24, the computer 23 refers to the radiation generation condition table to acquire the radiation generation condition and outputs it to the radiation source controller 22.

  Next, the computer 23 reads out a combination of two different shooting angles θ in stereo shooting, and outputs information on one shooting angle θ to the arm controller 18. Further, the imaging angle θ is an angle formed by the C arm 13 with respect to a direction perpendicular to the surface 31 of the bed 30, and the radiation irradiation unit 11 is located above and the radiation detection unit 12 is located below. The state in which 13 is perpendicular to the surface 31 is 0 °. In the present embodiment, as shown in FIG. 2, the shooting angle θ is clockwise as a positive direction and counterclockwise as a negative direction. In the present embodiment, it is assumed that a combination of shooting angles θ = 0 ° and + 4 ° is input, but there is no particular limitation, and an angle formed by two shooting directions corresponds to parallax. What is necessary is just to set the combination of imaging | photography angle (theta) so that it may become the range of about 2 degrees-8 degrees.

  When an imaging start instruction is input from the input unit 24, the arm controller 18 is perpendicular to the surface 31 based on the imaging site and imaging angle θ = 0 ° information output from the computer 23, A control signal for rotating and / or moving the C-arm 13 so as to move to a predetermined photographing position is output.

  When the C arm 13 moves to a predetermined position where the imaging angle θ = 0 °, which is perpendicular to the surface 31, based on an instruction from the arm controller 18, the computer 23 includes the radiation source controller 22 and the detector controller 20. The control signal is output so as to read the radiation image data DR of the image GR for the right eye that constitutes the stereoscopic image G.

  In response to this control signal, the radiation source 21 emits radiation, the radiation detector 19 detects the irradiated radiation, and a charge signal is read from the radiation detector 19 by the detector controller 20. The computer 23 performs predetermined signal processing on the charge signal and stores the radiation image data DR of the right-eye image GR.

  Next, based on the information of the shooting angle θ = + 4 ° output from the computer 23, the arm controller 18 causes the C-arm 13 to tilt + 4 ° with respect to the direction perpendicular to the surface 31 as shown in FIG. Output a simple control signal.

  When the C-arm 13 is inclined + 4 ° with respect to the surface 31, the computer 23 applies radiation to the radiation source controller 22 and the detector controller 20 and the radiation of the left-eye image GL constituting the stereoscopic image G. A control signal is output so as to read the image data DL. In this embodiment, the radiographic image data DR of the right-eye image GR at the imaging angle θ = 0 ° and the radiographic image data DL of the left-eye image GL at the imaging angle θ = + 4 ° are read and stored, respectively. However, it is not particularly limited. That is, the radiographic image data DL of the left-eye image GL at the imaging angle θ = 0 ° and the radiographic image data DR of the right-eye image GR at the imaging angle θ = + 4 ° may be read and stored.

  In response to this control signal, the radiation source 21 emits radiation, the radiation detector 19 detects the irradiated radiation, and a charge signal is read from the radiation detector 19 by the detector controller 20. The computer 23 performs predetermined signal processing on the electrical signal and stores the radiation image data DL of the left-eye image GL. The computer 23 stores the radiographic image data DL and DR, which are the stereoscopic image data D of the stereoscopic image G composed of the right-eye image GR and the left-eye image GL of the subject P, in the image file F and stores the stereoscopic image. It transmits to the display device 40. Further, the computer 23 can describe the imaging part information in the header area of the image file F, attach the imaging part information to the image file F, and transmit it to the stereoscopic image display device 40.

  Next, the stereoscopic image display device 40 will be described. FIG. 3 is a schematic configuration diagram of a stereoscopic image display apparatus. As shown in FIG. 3, the stereoscopic image display device 40 includes a monitor 41 as a display unit, an input unit 42 as an instruction receiving unit, and a computer 43. The stereoscopic image display device 40 displays the stereoscopic image G by displaying the right-eye image GR and the left-eye image GL on the monitor 41, respectively.

  The monitor 41 includes two monitor screens 41a and 41b adjacent in the vertical direction, a half mirror 44 provided between the monitor screens 41a and 41b, and a hinge mechanism 45 that makes the angle α formed by the monitor screens 41a and 41b variable. ing.

  The monitor screens 41a and 41b display the right-eye image GR and the left-eye image GL with polarized light orthogonal to each other based on the radiation image data DR and DL. The hinge mechanism 45 adjusts the angle α formed by the two monitor screens 41a and 41b by rotating the monitor screen 41a in the arrow direction of FIG. 3 with respect to the monitor screen 41b. The half mirror 44 tilts the monitor screen 41a with respect to the monitor screen 41b, thereby reflecting the display light on the monitor screen 41a as indicated by a solid line in the drawing, and indicating the display light on the monitor screen 41b by a broken line in the drawing. It is made to pass through.

  The half mirror 44 overlaps the optical image for right eye GR and the image for left eye GL so as to have a predetermined parallax on the half mirror 44 and optically couples them. Then, when the observer wears polarizing glasses having a right-eye polarizing lens for observing the right-eye image GR and a left-eye polarizing lens for observing the left-eye image GL, the observer can The stereoscopic image G is stereoscopically observed by observing the GL and the right-eye image GR with the left and right eyes, respectively. In the present embodiment, the monitor screen 41a displays the right-eye image GR, and the monitor screen 41b displays the left-eye image GL, but is not particularly limited.

  The input unit 42 is composed of a pointing device such as a keyboard and a mouse, and gives instructions regarding display from the observer, for example, instructions for selecting stereoscopic image data D to be displayed, starting display, and ending display. Accept.

  A program for causing the computer 43 to function as the stereoscopic image display apparatus according to the present embodiment is installed. The computer 43 includes a central processing unit (CPU), a storage device such as a semiconductor memory, a hard disk, and an SSD. The hardware includes a control unit 431, an image data storage unit 432, a display control unit 433, a display time. A determination unit 435 and a warning unit 436 are configured.

  The control unit 431 receives the image file F from the radiographic image capturing apparatus 10 and controls the entire computer 43. The image data storage unit 432 stores a plurality of stereoscopic image data D including the radiation image data DL and DR stored in the received image file F.

  The display control unit 433 controls the display on the monitor 41. The display control unit 433 reads one of the stereoscopic image data D selected by the observer using the input unit 42 from the image data storage unit 432 so that the left-eye image GL and the right-eye image GR have a mirror image relationship. Are displayed on the monitor screens 41a and 41b, respectively. The display control unit 433 displays imaging conditions, diagnosis reports, and the like on the monitor screens 41a and 41b as necessary.

  In addition, the display control unit 433 can sequentially display the stereoscopic image G using the plurality of stereoscopic image data D selected by the observer using the input unit 42. In this case, the display control unit 433 displays the first stereoscopic image G, and when the input unit 42 receives an instruction to display the next stereoscopic image G, the first stereoscopic image G is hidden. The next stereoscopic image data D is read out and displayed on the monitor 41. Thereafter, this process is repeated until the display of each stereoscopic image G is completed using all of the selected plurality of stereoscopic image data D. (Hereinafter referred to as continuous display).

  The display time determination unit 435 measures the display time of each stereoscopic image G. Here, the display time is the time from the start of display of the stereoscopic image G to the end of display. The display time determination unit 435 determines whether the display time of each stereoscopic image G is within a predetermined time set in advance. For example, the display time determination unit 435 may determine whether or not the display time of the stereoscopic image G being displayed is within 5 to 15 minutes. The predetermined time may be set by default, or may be set by the observer using the input unit 42.

  Further, in order to avoid including the time during which the observation is interrupted or to extend the observation time as necessary, the display time measurement unit 434 displays a display when the input unit 42 receives an instruction to stop the measurement. When the time measurement is stopped and the input unit 42 receives an instruction to resume the display, the measurement of the display time can be resumed. The display time measuring unit 434 can restart the measurement from the display time when the measurement is stopped based on the setting of the observer from the input unit 42, or can reset the display time and restart the measurement. .

  In order to consider that the ease of stereoscopic viewing differs depending on the imaging region of the stereoscopic image G, the display time determination unit 435 may set a predetermined time for each imaging region. Specifically, the display time determination unit 435 has a reference table in which a predetermined time is described for each imaging region, and is displayed with reference to the reference table based on the imaging region information attached to the image file F. A predetermined time is set in accordance with the imaging part of the stereoscopic image to be performed. For example, the display time discriminating unit 435 has a predetermined thickness of about 5 to 10 minutes for the head, chest, and abdomen that has a large depth and is likely to accumulate fatigue because it is thicker than the neck, legs, etc. Further, the predetermined time of the leg may be set to about 10 to 15 minutes.

  The warning unit 436 issues a warning by either screen display and sound or screen display and sound when the display time exceeds a predetermined time. The warning unit 436 may issue a warning for a predetermined time, or may release the warning when the input unit 42 receives an instruction to release the warning.

  Further, in order to avoid observing the stereoscopic image G being displayed after the display time exceeds the predetermined time, the display control unit 433 performs stereoscopic viewing when the display time exceeds the predetermined time during continuous display. The monitor 41 may be controlled to hide the image G. The display control unit 433 cancels the non-display state of the stereoscopic image G when the input unit 42 receives an instruction to cancel the warning.

  Further, in order to avoid the observation of the next stereoscopic image G after the display time exceeds the predetermined time, the input unit 42 allows the subsequent observers when the display time exceeds the predetermined time during the continuous display. The reception of the instruction by may be invalidated. The input unit 42 may invalidate only the reception of an instruction to display the next stereoscopic image G, or may invalidate the reception of all instructions. When only the instruction to display the next stereoscopic image G is invalidated, the input unit 42 cancels the invalid state by receiving an instruction to cancel the warning. When the acceptance of all instructions is invalidated, the invalid state is canceled by shutting off the main power supply of the computer 43.

  The operation of the stereoscopic image display device 40 will be described. First, a series of processes related to continuous display of the stereoscopic image G by the stereoscopic image display device 40 will be described with reference to FIG. FIG. 4 is a flowchart showing a series of processes related to continuous display of the stereoscopic image display device 40. The control unit 431 receives a plurality of image files F from the radiation image capturing apparatus 10, and the image data storage unit 432 stores a plurality of stereoscopic image data D (ST1).

  The input unit 42 accepts selection of a plurality of stereoscopic image data D (ST2). When the input unit 42 receives a display start instruction, the display control unit 433 reads one stereoscopic image data D from the image data storage unit 432 and displays the left-eye image GL and the right-eye image GR, respectively. The stereoscopic image G is displayed by being optically coupled by the half mirror 44 (ST3).

  The display time determination unit 435 starts measuring the display time of the stereoscopic image G (ST4). When the input unit 42 receives an instruction to stop measurement during display (ST5), the display time determination unit 435 stops measuring the display time (ST6). When the input unit 42 receives an instruction to restart the measurement (ST7), the measurement of the display time is started again (ST4).

  The display time determination unit 435 determines whether the measurement time is within a predetermined time (ST8), and if the measurement time exceeds the display time, the warning unit 436 selects either screen display and sound or screen display and sound. Is issued (ST9). When the input unit 42 receives an instruction to display the next stereoscopic image G (ST10), the display control unit 433 ends the display of the stereoscopic image G being displayed and the display time determination unit 435 displays the display time. This measurement is finished (ST11, ST12).

  Then, the display control unit 433 confirms whether or not there is the next stereoscopic image data D (ST13). If there is the next stereoscopic image data D, the next stereoscopic image G is displayed on the monitor 41. (ST3). A series of processes (ST4 to ST13) are repeated again. If there is no next stereoscopic image data D, the process ends.

  According to the above embodiment, the image data storage unit 432 stores a plurality of stereoscopic image data D, and the display control unit 433 reads one stereoscopic image data D from the plurality of stereoscopic image data D. Display on the monitor 41. Then, by accepting that the input unit 42 displays the next stereoscopic image G, the display control unit 433 sequentially displays the stereoscopic image G, and the time measuring unit 434 displays the display time for each stereoscopic image G. Measure. The display time determination unit 435 determines whether or not each display time is within a predetermined time in order to detect whether the observer is fatigued due to the observation of the stereoscopic image G. Then, when the display time exceeds a predetermined time, in order to prevent the fatigued observer from further increasing fatigue by continuing to observe the stereoscopic image G, screen display and sound, or screen display Issue a warning by one of the sounds. Therefore, the above embodiment measures the display time for each stereoscopic image G, determines whether each display time is within a predetermined time, and issues a warning when the display time exceeds the predetermined time. With this simple device configuration and processing, an increase in observer fatigue can be suppressed.

  Further, according to the above-described embodiment, the stereoscopic image data D accompanies the imaging part information of the subject P, and the display time determination unit 435 sets the predetermined time based on the attached imaging part information. Can be set. Therefore, the fatigue of the observer is detected by considering whether the observer is observing the stereoscopic image G of a part that is easily stereoscopically viewed or observing the stereoscopic image G of a part that is difficult to stereoscopically view. Increase can be suppressed.

  Further, according to the above-described embodiment, when the display unit exceeds the predetermined time, the input unit 42 invalidates a user instruction to be accepted thereafter, so that the observer can perform the next operation after the display time exceeds the predetermined time. Since it is possible to avoid observing the stereoscopic image G, it is possible to further suppress an increase in observer fatigue.

  Further, according to the above-described embodiment, the display control unit 433 controls the monitor 41 so as to hide the stereoscopic image being displayed when the display time exceeds the predetermined time. Since it is possible to prevent the observer from observing the stereoscopic image G being displayed after the predetermined time has been exceeded, an increase in observer fatigue can be further suppressed.

  Further, according to the above-described embodiment, the input unit 42 receives instructions for stopping and restarting the measurement of the display time. When the input unit 42 receives an instruction to stop the measurement, the display time determination unit 435 The measurement of the display time is stopped until an instruction for resumption is received.For example, when the display time is extended for more careful observation or when the observation is interrupted due to necessity, the fatigue of the observer is detected. Increase can be suppressed.

  In addition, the display configuration of the stereoscopic image G by the stereoscopic image display device 40 is not limited to the above configuration, and the stereoscopic image G is stereoscopically displayed using a parallax barrier method and a lenticular method. Alternatively, the right-eye image GR and the left-eye image GL are alternately switched and displayed at a predetermined cycle, and the observer opens and closes the right-eye portion and the left-eye portion in synchronization with the predetermined cycle. A configuration may be adopted in which stereoscopic viewing is performed by wearing stereoscopic glasses having a liquid crystal shutter or the like.

D Stereoscopic image data DL, DR Radiation image data F Image file G Stereoscopic image P Subject 40 Stereoscopic image display device 41 Monitor (display unit)
42 Input unit (instruction receiving unit)
432 Image data storage unit 433 Display control unit 434 Display time measurement unit 435 Display time determination unit 436 Warning unit

Claims (6)

An image data storage unit for storing a plurality of stereoscopic image data composed of two radiographic image data obtained by radiographing a subject from two different imaging directions;
A display unit for displaying a stereoscopic image of the subject using one stereoscopic image data read from the image data storage unit;
An instruction receiving unit that receives a user instruction to display the next stereoscopic image during the display of the stereoscopic image;
A display control unit that controls the display unit so that the display unit displays the next stereoscopic image based on the user instruction;
A display time measuring unit for measuring each display time for each stereoscopic image;
A display time determination unit for determining whether or not the display time is within a predetermined time;
A stereoscopic image display device comprising: a warning unit that issues a screen display and / or a voice warning when the display time exceeds a predetermined time. The stereoscopic image data is accompanied by imaging part information of the subject,
The stereoscopic image display apparatus according to claim 1, wherein the display time determination unit sets the predetermined time based on the imaging region information.   3. The stereoscopic image display device according to claim 1, wherein when the display time exceeds the predetermined time, the instruction receiving unit invalidates a user instruction that is subsequently received.   The display control unit controls the display unit so that the stereoscopic image being displayed is not displayed when the display time exceeds the predetermined time. The stereoscopic image display device according to claim 1. The instruction receiving unit receives an instruction to stop and restart the measurement of the display time;
5. The display time measuring unit stops the measurement of the display time until receiving an instruction to restart the measurement when receiving an instruction to stop the measurement. 6. The stereoscopic image display device according to claim 1. An image data storage unit for storing a plurality of stereoscopic image data composed of two radiographic image data obtained by radiographing a subject from two different imaging directions, and one stereoscopic view read out from the image data storage unit An operation method of a stereoscopic image display device including a display unit that displays a stereoscopic image of the subject using image data for an object,
While displaying the stereoscopic image, accept a user instruction to display the next stereoscopic image,
Based on the user instruction, the next stereoscopic image is displayed,
Measure the display time for each stereoscopic image,
Determine whether the display time is within a predetermined time,
An operation method for a stereoscopic image display device, wherein when the display time exceeds the predetermined time, a screen display and / or a sound warning is issued.

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