WO2012056693A1

WO2012056693A1 - Distance measurement/display method and device, and 3d image display method and device

Info

Publication number: WO2012056693A1
Application number: PCT/JP2011/005982
Authority: WO
Inventors: 俊孝阿賀野; 孝夫桑原; 靖子八尋; 大田　恭義; 玲長谷川
Original assignee: 富士フイルム株式会社
Priority date: 2010-10-28
Filing date: 2011-10-26
Publication date: 2012-05-03

Abstract

[Problem] To easily measure the distance between two points in a 3D image. [Solution] The following are provided: distance-information acquisition units (10 and 11) that are worn on the tips of two fingers of a hand and acquire information pertaining to the distance between said fingertips; and a distance-information display unit (50) that displays the information, obtained by the distance-information acquisition units (10 and 11), pertaining to the distance between the aforementioned fingertips. When the distance-information acquisition units (10 and 11) are placed in or near a 3D image, said distance-information acquisition units (10 and 11) acquire information pertaining to the distance between the aforementioned two fingertips, and said information is displayed on the distance-information display unit (50).

Description

Distance measurement display method and apparatus, and stereoscopic image display method and apparatus

The present invention provides a distance measurement display method and apparatus for measuring and displaying a distance between two points, and a radiation image for each imaging direction by irradiating the subject with radiation from two different imaging directions. The present invention relates to a stereoscopic image display method and apparatus for detecting and displaying a stereoscopic image using the two detected radiographic images.

Conventionally, it is known that stereoscopic viewing can be performed using parallax by displaying a combination of a plurality of images. Such a stereoscopically viewable image (hereinafter referred to as a stereoscopic image or a stereo image) is generated based on a plurality of images having parallax obtained by photographing the same subject from different directions.

And the generation of such stereoscopic images is used not only in the fields of digital cameras and televisions, but also in the field of radiographic imaging. That is, the patient is irradiated with radiation from different directions, the radiation transmitted through the subject is detected by a radiation image detector, and a plurality of radiation images having parallax are obtained, and these radiations are acquired. A stereoscopic image is displayed based on the image. And by generating a stereoscopic image in this way, a radiographic image with a sense of depth can be observed, and a radiographic image more suitable for diagnosis can be observed.

For example, Patent Document 1 proposes a mammography imaging apparatus as a radiographic imaging apparatus that generates a stereoscopic image as described above.

JP 2007-229201 A

Here, when the breast image taken by the above-described mammography apparatus is stereoscopically displayed, it is desired to measure the size of a calcification or a mass in the breast image or to compare these sizes. There is a case.

In such a case, for example, in a conventional two-dimensional display monitor, a ruler or the like can be directly applied to the monitor, but the ruler or the like is directly applied to the stereoscopically displayed image. The distance between two points on a stereoscopic image could not be measured easily.

In view of the above circumstances, an object of the present invention is to provide a distance measurement display method and apparatus and a stereoscopic image display method and apparatus that can easily measure the distance between two points on a stereoscopic image. .

In the distance measurement display method of the present invention, the distance information acquisition unit attached to each of the two fingertips of the hand acquires information about the distance between the two fingertips, and displays the acquired information about the distance. Features.

The stereoscopic image display method of the present invention acquires two radiographic images detected by a radiographic image detector by irradiating a subject with radiation from two imaging directions different from each other, and the acquired two radiations In a stereoscopic image display method for displaying a stereoscopic image on a display unit using an image, distance information acquisition units respectively attached to two fingertips of an observer's hand of the stereoscopic image are displayed in the stereoscopic image or stereoscopically. When installed in the vicinity of the image, the distance information acquisition unit acquires information on the distance between the two fingertips, and displays the acquired information on the distance.

The distance measurement display device of the present invention is mounted on each of two fingertips of a hand, and a distance information acquisition unit that acquires information about a distance between the two fingertips, and a fingertip acquired by the distance information acquisition unit And a distance information display unit for displaying information on the distance between the two.

Further, in the distance measurement display device of the present invention, a magnetic sensor attached to each of two fingertips can be provided as a distance information acquisition unit.

Further, as the distance information acquisition unit, an optical sensor attached to at least one of the two fingertips can be provided. As the distance information acquisition unit, a cover that covers each of the two fingertips can be used.

A stereoscopic image display apparatus according to the present invention includes a radiation image acquisition unit that acquires two radiation images detected by a radiation image detector by irradiating a subject with radiation from two different imaging directions, and a radiation In a stereoscopic image display device including a display unit that displays a stereoscopic image using two radiographic images acquired by an image acquisition unit, the stereoscopic image display device is attached to each of two fingertips of an observer's hand of the stereoscopic image. The distance between the fingertip acquired by the distance information acquisition unit and the distance information acquisition unit that acquires information about the distance between the two fingertips when placed in or near the stereoscopic image. And a distance information display unit for displaying information on the information.

Also, in the stereoscopic image display device of the present invention, a magnetic sensor attached to each of two fingertips can be provided as a distance information acquisition unit.

Also, as the distance information acquisition unit, an optical sensor attached to at least one of the two fingertips can be provided.

Also, a cover that covers each of the two fingertips can be used as the distance information acquisition unit.

According to the distance measurement display and apparatus of the present invention, when the distance information acquisition unit is mounted on each of the two fingertips of the hand, and the distance information acquisition unit is installed in or near the stereoscopic image Since the distance information acquisition unit acquires information about the distance between the two fingertips and displays the acquired distance information, the distance between the two points on the stereoscopic image is easily measured. be able to.

The figure which shows schematic structure of one Embodiment of the distance measurement display apparatus of this invention. 1 is a schematic configuration diagram of a breast image photographing display system using an embodiment of a stereoscopic image display device of the present invention. The figure which shows the state which inclined the rotation arm part only by the convergence angle (theta) in the breast imaging | photography imaging display system shown in FIG. The block diagram which shows schematic structure inside the computer of the mammography imaging | photography display system shown in FIG. FIG. 2 is a configuration diagram of a monitor in the breast image photographing display system shown in FIG. The flowchart for demonstrating the effect | action of the breast image radiographing display system using one Embodiment of the stereoscopic vision image display apparatus of this invention. Block diagram of a computer of a breast image photographing display system using another embodiment of the stereoscopic image display device of the present invention.

Hereinafter, a breast image photographing display system using an embodiment of a distance measurement display device and a stereoscopic image display device of the present invention will be described with reference to the drawings. First, a distance measurement display device in the breast image photographing display system will be described.

As shown in FIG. 1, the distance measurement display device of this embodiment includes a pair of distance measurement finger attachment units 10 attached to each of two fingertips of an observer's hand for observing a breast stereo image, which will be described later. , 11 are provided. In this embodiment, as shown in FIG. 1, the distance measuring finger mounting unit 10 is mounted on the index finger of the observer's hand, and the distance measuring finger mounting unit 11 is mounted on the thumb of the observer's hand. It is. In addition, about the finger | toe which mounts the distance measurement finger |

toe mounting parts

10 and 11, it is not restricted to two of an index finger and a thumb, The combination of another finger may be sufficient.

As shown in FIG. 1, the distance measurement

finger mounting portions

10 and 11 are made of rubber or the like, and cover 10a, 11a covering the tip of the finger, and position detection provided at the tip of the covers 10a, 11a.

Parts

10b and 11b. The position detection unit 10b detects the tip position of the index finger, and the position detection unit 11b detects the tip position of the thumb. As the

position detection units

10b and 11b, known ones can be used. For example, a magnetic sensor or an acceleration sensor can be used.

The information on the tip position of the index finger detected by the position detection unit 10b and the information on the tip position of the thumb detected by the position detection unit 11b are output to the distance information calculation unit 30. The distance information calculation unit 30 calculates the distance between the position detection unit 10b and the position detection unit 11b based on the input tip position information of the index finger and the tip position information of the thumb. In the distance information calculation unit 30, the coordinate systems of the

position detection units

10b and 11b are set in advance.

Then, the distance information calculated by the distance information calculation unit 30 is output to the distance information display unit 50, and the distance information display unit 50 displays distance information corresponding to the interval between the viewer's index finger and thumb.

Next, a description will be given of the breast image radiographing display system configured to include the distance measurement display device configured as described above.

FIG. 2 is a diagram showing a schematic configuration of the entire breast image capturing / displaying system of the present embodiment.

As shown in FIG. 2, the mammography and display system of the present embodiment includes a mammography apparatus 1, a computer 2 connected to the mammography apparatus 1, a monitor 3 and an input unit 4 connected to the computer 2. And.

As shown in FIG. 2, the mammography apparatus 1 has a base 21, a rotary shaft 12 that can move in the vertical direction (Z direction) with respect to the base 21, and can rotate. The arm part 13 connected with the base 21 is provided. FIG. 3 shows the arm 13 viewed from the right direction in FIG.

The arm portion 13 has an alphabet C shape, and a radiation source unit 16 is attached to one end of the arm portion 13 so as to face the imaging stand 14 at the other end. The movement of the arm part 13 in the vertical direction is controlled by an arm controller 31 incorporated in the base 21.

In the imaging table 14, a radiation image detector 15 such as a flat panel detector, and a detector controller 33 for controlling reading of a charge signal from the radiation image detector 15 are provided.

Further, inside the imaging table 14, a charge amplifier that converts the charge signal read from the radiation image detector 15 into a voltage signal, a correlated double sampling circuit that samples the voltage signal output from the charge amplifier, A circuit board provided with an AD conversion unit for converting a voltage signal into a digital signal is also installed.

The radiation image detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation image detector that directly receives radiation and generates charges. Alternatively, 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 readout method, a radiation image signal is read out by turning on / off a TFT (thin film transistor) switch, or by irradiating reading light. It is desirable to use a so-called optical readout system from which a radiation image signal is read out, but the present invention is not limited to this, and other systems may be used.

In the radiation source unit 16, a radiation source 17 and a radiation source controller 32 are accommodated. The radiation source controller 32 controls the timing of irradiating radiation from the radiation source 17 and the radiation generation conditions (tube current, time, tube voltage, etc.) in the radiation source 17.

Further, in the central part of the arm part 13, a compression plate 18 that is arranged above the imaging table 14 and presses against the breast, a support unit 20 that supports the compression plate 18, and a support unit 20 in the vertical direction. A moving mechanism 19 for moving is provided. The position of the compression plate 18 and the compression pressure are controlled by the compression plate controller 34.

The computer 2 includes a central processing unit (CPU) and a storage device such as a semiconductor memory, a hard disk, and an SSD. The control unit 8a, the radiation image storage unit 8b, and the display as shown in FIG. The control unit 8c and the distance information calculation unit 30 in the above-described distance measurement display device are configured.

The control unit 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described in detail later.

The radiation image storage unit 8b stores in advance two radiation image signals detected by the radiation image detector 15 by photographing from two different photographing directions.

The display control unit 8c displays a stereo image of the breast of the subject M on the monitor 3 after performing predetermined signal processing on the radiographic image signal read from the radiographic image storage unit 8b. In addition, the display control unit 8 c causes the monitor 3 to display distance information corresponding to the interval between the index finger and the thumb calculated by the distance information calculation unit 30. That is, the monitor 3 shown in FIG. 2 displays a stereo image and also functions as the distance information display unit 50 of the distance measurement display device described above. In the present embodiment, the display of the stereo image and the display of the distance information are performed on the same monitor 3 as described above, but the distance information may be displayed on a monitor different from the monitor 3.

The input unit 4 is configured by a pointing device such as a keyboard and a mouse, for example, and accepts input of shooting conditions and shooting start instructions by the photographer.

The monitor 3 is configured to be able to display a stereo image using two radiation image signals output from the computer 2. Specifically, as shown in FIG. 5, the monitor 3 according to the present embodiment displays two radiation images GL and GR to display the breasts in the radiation images GL and GR in a three-dimensional manner. And the monitor 3 is comprised combining the upper display part 40 and the lower display part 41 which inclined forward, as shown in FIG. A half mirror 42 is disposed between the two

display units

40 and 41.

The upper display unit 40 displays the right-eye radiographic image GR on the display screen 40a, and the lower display unit 41 displays the left-eye radiographic image GL on the display screen 41a. The right-eye radiographic image GR displayed by the upper display unit 40 is reflected by the half mirror 42 as shown by a solid line in the figure, and the left-eye radiographic image displayed by the lower display unit 41 is a broken line in the figure. As shown in FIG. The half mirror 42 is disposed at an angle such that the radiographic images GL and GR overlap during observation.

Then, the observer has polarized light having a right-eye polarizing lens that deflects so that the right-eye radiation image GR is incident only on the right eye and a left-eye polarizing lens that polarizes so that the left-eye radiation image GL is incident only on the left eye By wearing glasses, the two radiation images GL and GR can be observed with the left and right eyes, respectively, and the breast can be viewed stereoscopically.

The monitor 3 is not limited to such a configuration. For example, a configuration may be adopted in which a stereo image is generated by displaying two radiographic images on a stereoscopically viewable 3D liquid crystal, such as a parallax barrier method and a lenticular method. Good.

Next, the operation of the breast image radiographing display system of this embodiment will be described.

First, the patient's breast M is placed on the imaging table 14, and the breast M is compressed with a predetermined pressure by the compression plate 18 (S10).

Then, when there is an instruction to start imaging at the input unit 4, the first radiographic image of the two radiographic images constituting the stereo image of the breast M is captured (S12).

Specifically, first, the control unit 8 a reads a convergence angle θ for photographing a preset stereo image, and outputs the read information on the convergence angle θ to the arm controller 31. In this embodiment, θ = 4 ° is stored in advance as information on the convergence angle θ at this time. However, the present invention is not limited to this, and an arbitrary convergence angle is set in the input unit 4 by the photographer. Is possible.

Then, the arm controller 31 receives the information of the convergence angle θ output from the control unit 8a, and the arm controller 31 first has the arm unit 13 in a direction perpendicular to the imaging table 14, as shown in FIG. The control signal is output as follows.

Then, in a state where the arm unit 13 is in a direction perpendicular to the imaging table 14 according to the control signal output from the arm controller 31, the control unit 8 a controls the radiation source controller 32 and the detector controller 33. On the other hand, a control signal is output so as to perform radiation irradiation and readout of a radiographic image signal. In response to this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the 0 ° direction is detected by the radiation image detector 15, and a radiation image signal is read by the detector controller 33. After predetermined signal processing is performed on the radiographic image signal, the radiographic image signal is stored in the radiographic image storage unit 8 b of the computer 2.

Next, the second radiographic image out of the two radiographic images constituting the stereo image is taken (S14). Specifically, as shown in FIG. 3, the arm controller 31 outputs a control signal so that the arm unit 13 is rotated by + θ ° with respect to a direction perpendicular to the imaging table 14. That is, in the present embodiment, the control signal is output so that the arm unit 13 is rotated by 4 ° with respect to the direction perpendicular to the imaging table 14.

Then, in a state in which the arm unit 13 is rotated by 4 ° according to the control signal output from the arm controller 31, the control unit 8a applies radiation to the radiation source controller 32 and the detector controller 33 and the radiation image signal. A control signal is output so as to read out. In response to this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the 4 ° direction is detected by the radiation image detector 15, and the radiation image signal is read by the detector controller 33. After the predetermined signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 2.

Then, the two radiographic image signals stored in the radiographic image storage unit 8b are read out, subjected to predetermined processing on these radiographic image signals in the display control unit 8c, and then output to the monitor 3, A stereo image of the breast is displayed on the monitor 3 (S16).

Next, after the stereo image is displayed as described above, when the observer of the stereo image wants to know the distance between two predetermined points of the breast image, specifically, for example, the stereo image When it is desired to measure or compare the size of calcification or mass in the inside, the covers 10a and 11a of the distance measuring display device described above are attached to the index finger and the thumb, The tip of the thumb is placed at two predetermined points in the stereo image or two predetermined points near the stereo image (S18).

Then, the

position detection units

10b and 11b provided at the tips of the covers 10a and 11a detect the tip position of the index finger and the tip position of the thumb, respectively, and the information on the tip position is sent to the distance information calculation unit 30 of the computer 2. Is output. Output of position information from the

position detection units

10b and 11b to the computer 2 may be performed via a wire or may be performed by wireless communication.

Then, the distance information calculation unit 30 of the computer 2 calculates the distance between the position detection unit 10b and the position detection unit 11b based on the input tip position information of the index finger and the tip position information of the thumb (S20). .

The distance information calculated in the distance information calculation unit 30 is output to the display control unit 8c of the computer 2, and the display control unit 8c displays the index finger and thumb of the observer on the monitor 3 based on the input distance information. The distance information corresponding to the interval is displayed (S22).

Here, when the computer 2 is to display two radiation images constituting a stereo image on the monitor 3 at the same magnification, the distance information measured as described above is the breast to be imaged. For example, as shown in FIG. 7, the enlargement / reduction processing unit 8d is provided, and the two radiographic images stored in the radiographic image storage unit 8b are enlarged or reduced as shown in FIG. In the case where a stereo image is displayed on the monitor 3 after performing the above, the distance information measured as described above does not match the distance information on the breast to be imaged.

Therefore, after the distance information calculation unit 30 calculates the distance between the position detection unit 10b and the position detection unit 11b, the distance is converted into the actual distance in the breast according to the expansion / contraction rate in the expansion / contraction processing unit 8d. May be. Specifically, for example, when the computer 2 performs an n-fold enlargement / reduction process on two radiation images, the distance information calculation unit 30 is located between the position detection unit 10b and the position detection unit 11b. A value obtained by multiplying the distance by 1 / n is calculated as an actual distance, and this actual distance is displayed on the monitor 3.

In the above embodiment, the

position detection units

10b and 11b are attached to the index finger and the thumb as the distance measurement display device. However, the present invention is not limited to this, and the covers 10a and 11a attached to the index finger and the thumb are not limited thereto. A light source is installed on either side of the light sensor, and a light sensor for detecting light emitted from the light source is provided on the other side of the light source so as to face the light source. Based on the intensity of the light detected by the light sensor, You may make it calculate the distance between.

Alternatively, a light sensor is provided on both the index finger and the thumb, and the light source is installed in a place other than the finger, for example, in the vicinity of the monitor 3, and the light emitted from the light source is detected by the two light sensors, respectively. The distance from the light source to each photosensor is calculated based on the detected light intensity, and the distance between the two fingers is calculated by calculating the distance between the two photosensors based on the two distances. A distance corresponding to the distance may be acquired.

In the above embodiment, the distance measurement display device and the stereoscopic image display device of the present invention are applied to the breast image photographing display system. However, the subject is not limited to the breast, and the chest other than the breast is used. You may make it apply to what is called radiographic imaging apparatuses for what is called general imaging, such as imaging | photography.

Claims

A distance measurement display method characterized in that information on a distance between the two fingertips is acquired by a distance information acquisition unit attached to each of two fingertips of the hand, and the acquired information on the distance is displayed. .
Two radiation images detected by the radiation image detector are acquired by irradiating the subject with radiation from two different imaging directions, respectively, and a stereoscopic image is displayed on the display unit using the two acquired radiation images. In the stereoscopic image display method for displaying
When the distance information acquisition unit respectively attached to the two fingertips of the observer's hand of the stereoscopic image is installed in the stereoscopic image or in the vicinity of the stereoscopic image, the distance information acquisition unit causes the two information to be acquired by the distance information acquisition unit. Get information about the distance between your fingertips,
A method for displaying a stereoscopic image, wherein the information regarding the acquired distance is displayed.
A distance information acquisition unit that is attached to each of the two fingertips of the hand and acquires information about the distance between the two fingertips, and displays information about the distance between the fingertips acquired by the distance information acquisition unit A distance measurement display device comprising a distance information display unit.
The distance measurement display device according to claim 3, wherein the distance information acquisition unit includes a magnetic sensor attached to each of the two fingertips.
The distance measurement display device according to claim 3, wherein the distance information acquisition unit includes an optical sensor attached to at least one of the two fingertips.
The distance measurement display device according to any one of claims 3 to 5, wherein the distance information acquisition unit includes a cover covering each of two fingertips.
A radiographic image acquisition unit that acquires two radiographic images detected by the radiographic image detector by irradiating the subject with radiation from two different imaging directions, and two radiographic image acquisition units acquired by the radiographic image acquisition unit In a stereoscopic image display device including a display unit that displays a stereoscopic image using a radiation image,
Information about the distance between the two fingertips when mounted on the two fingertips of the observer's hand of the stereoscopic image and arranged in the stereoscopic image or in the vicinity of the stereoscopic image. A distance information acquisition unit to acquire;
A stereoscopic image display device comprising: a distance information display unit that displays information on the distance between the fingertips acquired in the distance information acquisition unit.
The stereoscopic image display device according to claim 7, wherein the distance information acquisition unit includes a magnetic sensor attached to each of the two fingertips.
The stereoscopic image display device according to claim 7, wherein the distance information acquisition unit includes an optical sensor attached to at least one of the two fingertips.
The stereoscopic image display device according to any one of claims 7 to 9, wherein the distance information acquisition unit includes a cover covering each of two fingertips.