JP2004294507A - Cassette for positional relation recording - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately record positional relation of the irradiation position of position confirmation radiation and the irradiation position of positional confirmation light under visible light in a storage phosphor panel, concerning a cassette for positional relation recording. <P>SOLUTION: The storage phosphor panel 10 is stored in the cassette for the positional relation recording 15 provided with a filter window 16 transmitting the position confirming radiation Xc, a uniform radiation Xb and a blue positional confirmation light Lp by blocking red light. Irradiation of the positional confirmation radiation Xc, irradiation of the uniform radiation Xb to a range including a region on the storage phosphor panel 10 irradiating the position confirming radiation Xc and irradiation of the blue positional confirmation light Lp are carried out on to the storage phosphor panel 10, arranged at a prescribed position in an indoor illuminating light 61 emitting the red light which the visible light, in this order; and the positional relation of the irradiation position of the positional confirmation radiation Xc to the irradiation position of the positional confirmation light Lp is recorded in the storage phosphor panel 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cassette for recording a positional relationship, and more particularly to a cassette for recording a positional relationship used when confirming a position irradiated with radiation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a radiotherapy apparatus that performs treatment by irradiating a focus on a lesion is known (for example, see Patent Document 1 and Non-Patent Document 1). In such an apparatus, the position confirmation light set so as to propagate the same path as the therapeutic radiation propagation path is used, and the lesion part is placed on the optical path of the position confirmation light. By adjusting the position and then irradiating the therapeutic radiation, the therapeutic radiation is accurately applied to the lesion.
[0003]
Further, the deviation of the irradiation position allowed when the therapeutic radiation is irradiated to the lesion is several mm. For example, every time the apparatus is operated, the deviation of the optical path of the position confirmation light with respect to the propagation path of the therapeutic radiation ( Thereafter, it is confirmed that the optical path position deviation) is within an allowable range that does not hinder radiation therapy.
[0004]
Confirmation that the optical path position deviation is within an allowable range is, for example, preparing an X-ray film having a hole in the center, and adjusting the hole position to match the center position of the light beam of the position confirmation light. After the X-ray film is visually aligned and positioned, the X-ray film is irradiated with position confirmation radiation that propagates the same propagation path as the therapeutic radiation, and then the X-ray film is developed to form the hole position. This is done by reading the positional relationship with the position irradiated with the position confirmation radiation. Note that this optical path position shift confirmation operation is performed in a state in which room light is turned on, that is, under visible light.
[0005]
[Patent Document 1]
Utility Model Registration No. 2593412 [0006]
[Non-Patent Document 1]
Illustrated Clinical Radiation Technology Practice Guide (2002) Bunkodo Co., Ltd. [0007]
[Problems to be solved by the invention]
By the way, in order to guarantee that the optical path position deviation is several mm or less, it is desirable to measure the optical path position deviation with an accuracy one digit smaller than this value. If the alignment with the center position of the light beam is to be performed accurately, the work becomes complicated, the work efficiency of the radiation therapy is lowered, and the reliability in measuring the optical path position deviation is insufficient. Further, when the measurement work of the optical path position deviation is performed in a dark place, there is a risk that the work efficiency may be lowered, and there is a demand for performing this measurement work under visible light.
[0008]
The present invention has been made in view of the above circumstances, and the positional relationship between the position confirmation radiation irradiation position and the position confirmation light irradiation position under visible light is more easily and accurately recorded in the stimulable phosphor panel. It is an object of the present invention to provide a positional relationship recording cassette that accommodates the stimulable phosphor panel.
[0009]
[Means for Solving the Problems]
The first positional relationship recording cassette of the present invention is configured to irradiate the stimulable phosphor panel disposed at a predetermined position with irradiation of position confirmation radiation and on the stimulable phosphor panel irradiated with the position confirmation radiation. The irradiation of the uniform radiation to the range including the region of the region and the irradiation of the position confirmation light in the visible wavelength region, and the irradiation of the position confirmation light after the irradiation of the uniform radiation, A positional relationship recording cassette containing the stimulable phosphor panel, which is used when recording a positional relationship between an irradiation position and a position confirmation light irradiation position in the stimulable phosphor panel, the position confirmation radiation And a filter window that transmits at least a part of the uniform radiation and at least a part of the position confirmation light and blocks light in a part of the wavelength region in the visible wavelength region. It is.
[0010]
In the second positional relationship recording cassette of the present invention, the stimulable phosphor panel arranged at a predetermined position is irradiated with position confirmation light in the visible wavelength region after irradiation with position confirmation radiation, This is a positional relationship recording cassette containing the stimulable phosphor panel, which is used when recording the positional relationship between the position confirmation radiation irradiation position and the position confirmation light irradiation position in the stimulable phosphor panel. And a filter window that transmits at least a part of the position confirmation radiation and at least a part of the position confirmation light and blocks light in a part of the wavelength region in the visible wavelength region.
[0011]
The positional relationship recording cassette may also be used as a cassette for storing a stimulable phosphor panel used when recording a radiation image of a subject such as a living body.
[0012]
The position confirmation radiation and the position confirmation light are emitted from the radiation irradiation means and the confirmation light irradiation means, respectively, so that the positional relationship can be compared with each other when recorded on the stimulable phosphor panel. For example, it is desirable to be able to confirm the center positions of the position confirmation radiation recording area and the position confirmation light recording area in the stimulable phosphor panel, or to confirm the relative inclination of each of the recording areas.
[0013]
【The invention's effect】
The positional relationship recording cassette of the present invention is a positional relationship recording cassette containing a stimulable phosphor panel that records the positional relationship between the position confirmation radiation irradiation position and the position confirmation light irradiation position. A filter window that transmits at least a part of the uniform radiation, at least a part of the position confirmation light, and blocks light in a part of the wavelength region in the visible wavelength region, or The filter window has a filter window that transmits at least part of the position confirmation radiation and at least part of the position confirmation light and blocks light in a part of the visible wavelength range. By recording the positional relationship under visible light in the blocked wavelength region, while suppressing the incidence of this visible light on the storage phosphor The recording operations of the serial positional relationship can be easily performed, it is possible to suppress a decrease in work efficiency.
[0014]
At the same time, radiation energy is accumulated and recorded at different levels in the irradiation region of position confirmation radiation and the irradiation region of position confirmation light in the stimulable phosphor panel, thereby reading a radiation image from the stimulable phosphor panel. Since the positional relationship between the irradiation position of the position confirmation radiation and the irradiation position of the position confirmation light can be acquired, the acquisition accuracy of the positional relationship is reduced. For example, the hole position of the X-ray film and the light beam of the position confirmation light Factors such as the adjustment work of the alignment with the center position can be removed. As a result, the positional relationship can be obtained from the radiographic image more easily and with higher accuracy, and when confirming that the optical path displacement of the position confirmation light with respect to the position confirmation radiation is within an allowable range that does not interfere with radiation therapy. The reliability and efficiency of this confirmation work can be further increased.
[0015]
The stimulable phosphor panel, for example, stores a part of the radiation energy when irradiated with radiation such as X-rays, and then corresponds to the stored radiation energy when irradiated with excitation light such as visible light. A recording medium using a stimulable phosphor (stimulable phosphor) that generates stimulated emission light and emits the radiation energy, and has a stimulable phosphor layer made of the stimulable phosphor on a support substrate. Those made by laminating are known.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a side view showing a schematic configuration of a radiotherapy apparatus using a positional relationship recording cassette according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a schematic configuration of a positional relationship recording cassette according to an embodiment of the present invention. FIG. 3 is a diagram showing the relationship between the wavelength region of the position confirmation light and the visible light for illumination and the light transmission characteristics of the filter window, and FIG. 4 is a side view showing how the radiation is irradiated to the lesion using a radiotherapy apparatus. FIG. 5 is an enlarged side view showing a radiation irradiation unit and a confirmation light irradiation unit, and FIG. 6 is a diagram showing an elongated cross-shaped region formed in the light reflection mirror that reflects the position confirmation light.
[0017]
The illustrated radiotherapy apparatus includes a radiation irradiation unit 20 that irradiates X-rays, which are an example of radiation, and a confirmation light irradiation unit 30 that emits position confirmation light in the visible wavelength region, and is stored at a predetermined position. Irradiation of the position confirming radiation Xc by the radiation irradiating unit 20 and the radiation irradiating unit 20 to a range including the region on the stimulable phosphor panel 10 irradiated with the position confirming radiation Xc. The irradiation of the uniform radiation Xb by the irradiation and the irradiation of the position confirmation light Lp by the confirmation light irradiating unit 30 and the irradiation of the position confirmation light Lp after the irradiation of the uniform radiation Xb are performed. The panel 10 includes a positional relationship recording unit 40 that records the positional relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp.
[0018]
The radiotherapy apparatus irradiates position confirmation light in a visible wavelength region set so as to propagate the same path as the propagation path of the therapeutic X-ray before irradiating the lesion with the therapeutic X-ray. The position of the lesion is aligned so that it is arranged on the optical path of the position confirmation light, and the therapeutic X-ray and the position confirmation radiation Xc are set to propagate through the same propagation path. Is done.
[0019]
As shown in FIG. 1 and FIG. 2, the positional relationship recording cassette 15 according to the embodiment of the present invention sets the positional relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp to a predetermined position. A cassette used for recording in the arranged stimulable phosphor panel 10 and accommodates the stimulable phosphor panel 10. This positional relationship recording cassette 15 transmits at least a part of the position confirmation radiation Xc, at least a part of the uniform radiation Xb, and at least a part of the position confirmation light Lp, and transmits a part of the wavelength region in the visible wavelength region. The filter window 16 that blocks the visible light for illumination Lr emitted from the indoor lamp 61 that is light is provided.
[0020]
The wavelength of the position confirmation light Lp, the wavelength of the visible light Lr for illumination, and the light transmission characteristics (light blocking characteristics) of the filter window 16 will be described with reference to FIG. Since the wavelength region of the uniform radiation Xb is the same as the wavelength region of the position confirmation light Lp, the description thereof is omitted.
[0021]
As shown in FIG. 3, the position confirmation light Lp is blue light having a peak light intensity at a wavelength of 435 nm and extending from a wavelength of 380 nm to 495 nm, and the visible light for illumination Lr emitted from the room lamp 61 has a peak at a wavelength of 700 nm. It is red light having a light intensity ranging from 625 nm to 780 nm. The filter window 16 transmits blue light having a wavelength of 380 nm to 495 nm, which is the wavelength region of the position confirmation light Lp, and blocks red light having a wavelength of 625 nm to 780 nm, which is the wavelength region of the illumination visible light Lr. It has a light transmission characteristic Tf. Here, a region extending from a wavelength of 625 nm to 780 nm is a partial wavelength region in the visible wavelength region blocked by the filter window 16.
[0022]
As shown in FIG. 4, the radiotherapy apparatus places a base 1 having a placement moving unit 6 on which a patient 1 is placed and the patient 1 is moved in a horizontal direction perpendicular to the irradiation direction of the position confirmation radiation Xc. The radiation irradiating unit 20 and the confirmation light irradiating unit 30 are disposed at the tip of the arm unit 7 that is provided and supported by the base table 5 and positioned above the placement moving unit 6. By the movement of the placement moving unit 6 described above, the lesion part 2 of the patient 1 is adjusted so as to be positioned in the therapeutic X-ray irradiation field irradiated from the radiation irradiation unit 20.
[0023]
As shown in the enlarged view of FIG. 5, the radiation irradiation unit 20 is deflected by a propagation path 21 that propagates an electron beam generated by an electron beam generation source 29, a deflection magnet 22 that deflects the electron beam, and a deflection magnet 22. A vacuum window 23 provided at the exit from the electron beam deflection magnet 22, an X-ray target 24 that emits X-rays upon receiving an electron beam passing through the vacuum window 23, and a propagation path of the emitted X-rays are narrowed down. The conical collimator 25 includes movable collimators 26A and 26B, and a flattening filter 27 disposed between the conical collimator 25 and the movable collimators 26A and 26B. The flattening filter 27 is a filter that makes the X-ray dose distribution passing through the conical collimator 25 uniform.
[0024]
Each of the movable collimators 26A and 26B is composed of two collimator blocks, and by moving these four collimator blocks in a plane perpendicular to the X-ray propagation path, the cross-sectional shape of the X-ray propagation path is The shape should be similar to the desired lesion. That is, by changing the interval between the four collimator blocks, an irradiation field that matches the shape of the target (the shape of the lesion) that is irradiated with X-rays is set.
[0025]
The confirmation light irradiation unit 30 is disposed between the movable collimators 26 </ b> A and 26 </ b> B and the flattening filter 27, a light reflection mirror 31 that can be taken in and out of the X-ray propagation path, and the X-ray target 24 via the light reflection mirror 31. And a visible light source 32 that emits a position confirmation light Lp arranged at a conjugate position, and the position confirmation light Lp emitted from the visible light source 32 is reflected by the light reflecting mirror 31 and propagates in the same direction as the X-ray. As shown in FIG. 6, the region where the light reflecting mirror 31 reflects the position confirmation light Lp is, for example, an elongated cross shape, and the cross section of the light beam of the position confirmation light Lp reflected by the elongated cross shape region J is It becomes an elongated cross shape.
[0026]
The positional relationship recording means 40 is configured to irradiate the X-ray from the radiation irradiating unit 20 and set the X-ray dose to be irradiated, move the movable collimators 26A and 26B, irradiate the X-ray from the radiation irradiating unit 20, and the visible light source 31. The relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp and the position of the position confirmation light Lp in the stimulable phosphor panel 10 is controlled by the controller 41 that controls the lighting of the light reflection mirror 32 and the like. And a data storage unit 42 for outputting data G1 such as a control signal or a control program to be automatically recorded to the controller 41.
[0027]
Next, the case where the optical path positional deviation is recorded on the stimulable phosphor panel 10 accommodated in the positional relationship recording cassette 15 will be described. FIG. 7 is an enlarged side view showing a state in which the position confirmation radiation is emitted from the radiation irradiating unit, and FIG. 8 is a diagram showing X-ray and visible light regions recorded on the stimulable phosphor panel. Is a diagram showing a region irradiated with position confirmation radiation, FIG. 8B is a diagram showing a region irradiated with uniform radiation, and FIG. 8C is a diagram showing a region irradiated with position confirmation light. . FIG. 9 is an enlarged side view showing a state in which uniform radiation is emitted from the radiation irradiation unit, and FIG. 10 is an enlarged side view showing a state in which position confirmation light is emitted from the confirmation light irradiation unit.
[0028]
First, the stimulable phosphor panel 10 is accommodated in the positional relationship recording cassette 15. Then, the positional relationship recording cassette 15 is placed on the placement moving unit 6 of the base 5, and the storage phosphor unit 10 is irradiated with X-rays from the radiation irradiating unit 20 by the movement of the placement moving unit 6. It is moved to a predetermined position (see FIG. 1). At this time, it arrange | positions so that the filter window 16 of the cassette 15 for positional relationship recording may face the radiation irradiation part 20 and the confirmation light irradiation part 30 side.
[0029]
Next, data G1 such as a control signal or a control program for automatically recording the optical path position deviation on the stimulable phosphor panel 10 is output from the data storage unit 42 to the controller 41, and the control from the controller 41 that has input the data G1 is performed. The following operation is executed by the output of the signal G2.
[0030]
As shown in FIG. 7, first, the light reflecting mirror 32 is retracted from the X-ray propagation path, and the movable collimators 26A and 26B are narrowed. Thereafter, X-rays are emitted from the X-ray target 24 that has been irradiated with the electron beam generated by the electron beam generation source 29. X-rays radiated from the X-ray target 24 pass through the conical collimator 25, the flattening filter 27, and the narrowed movable collimators 26A and 26B. 10 is irradiated. Thereby, for example, a thick and short cross-shaped region Rc (irradiation field) irradiated with the position confirmation radiation Xc is recorded on the stimulable phosphor panel 10 (see FIG. 8A).
[0031]
Next, as shown in FIG. 9, the movable collimators 26 </ b> A and 26 </ b> B are opened with the light reflecting mirror 32 kept away from the X-ray propagation path. Thereafter, X-rays are emitted from the X-ray target 24 that has been irradiated with the electron beam generated by the electron beam generation source 29. X-rays emitted from the X-ray target 24 are irradiated to the stimulable phosphor panel 10 as uniform radiation Xb through the conical collimator 25, the flattening filter 27, and the open movable collimators 26A and 26B. The uniform radiation Xb is irradiated to a range including a region on the stimulable phosphor panel 10 irradiated with the position confirmation radiation Xc. Thereby, the uniform radiation Xb is irradiated to a range including the region Rc irradiated with the position confirmation radiation Xc on the stimulable phosphor panel 10, and the position confirmation radiation Xc and the uniform radiation Xb are accumulated in the stimulable phosphor panel 10. Is recorded on top of each other. FIG. 8B shows a large circular region Rb as an example of a region irradiated with the uniform radiation Xb.
[0032]
Next, as shown in FIG. 10, the light reflecting mirror 32 is inserted into the X-ray propagation path while the movable collimators 26A and 26B remain open. Thereafter, the visible light source 31 is turned on. The position confirmation light Lp emitted from the visible light source 31 is reflected by the light reflecting mirror 32, and is irradiated to the stimulable phosphor panel 10 through the opened movable collimators 26A and 26B. Here, since the region where the light reflecting mirror 32 reflects the position confirmation light Lp has an elongated cross shape, the region irradiated with the position confirmation light Lp on the stimulable phosphor panel 10 has an elongated cross shape. The region is a region that overlaps the region where the position confirmation radiation Xc and the uniform radiation Xb are recorded in an overlapping manner. From the elongated cross-shaped region of the stimulable phosphor panel 10 irradiated with the position confirmation light Lp, stimulated emission light is generated by the irradiation of the position confirmation light Lp, and the position confirmation radiation Xc and the uniform radiation Xb are generated. The radiation energy accumulated in the stimulable phosphor panel 10 is emitted from the elongated cross region. FIG. 8C shows the elongate cross region Rp in which the radiation energy is released from the stimulable phosphor panel 10 by the irradiation of the position confirmation light Lp.
[0033]
With the above operation, the positional relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp is recorded in the stimulable phosphor panel 10.
[0034]
The stimulable phosphor panel 10 accommodated in the positional relationship recording cassette 15 emits radiation energy stored therein even when irradiated with light in any wavelength region of the visible wavelength region. Since the illumination visible light Lr emitted from the lamp 61 is blocked by the filter window 16, the radiation energy recorded in the stimulable phosphor panel 10 is released only by the position confirmation light Lp transmitted through the filter window 16.
[0035]
The stimulable phosphor panel 10 in which the optical path position deviation is recorded is loaded in a radiation image reading device (not shown), and an image showing the recorded optical path position deviation is read. FIG. 11 is a diagram showing an image representing the positional relationship between the position confirmation radiation irradiation position and the position confirmation light irradiation position read from the stimulable phosphor panel.
[0036]
As shown in FIG. 11, an image Gc indicating the position confirmation radiation Xc, an image Gb indicating the uniform radiation Xb, and an image Gp indicating the position confirmation light Lp are read as shown in FIG. Are superimposed, and the positional relationship between the center position Vc of the image Gc indicating the position confirmation radiation Xc and the center position Vp of the image Gp indicating the position confirmation light Lp is the optical path position deviation. When the positional deviation amount δ indicated by the distance between the center position Vc and the center position Vp is equal to or less than a predetermined allowable amount E, the position confirmation light Lp emitted from the confirmation light irradiation unit 30 is the position confirmation radiation Xc. It can be confirmed that it can be used to indicate the irradiation position.
[0037]
The image Gp indicating the position confirmation light Lp is an image formed by erasing a part of the radiation image recorded on the stimulable phosphor panel by the position confirmation radiation Xc and the uniform radiation Xb.
[0038]
Here, the positional deviation amount δ is obtained by image processing or the like, and when this positional deviation amount δ exceeds a predetermined allowable amount E, a warning is given, for example, by lighting of the lamp 65 arranged in the arm portion 7. You may make it emit.
[0039]
The filter window of the positional relationship recording cassette may be any one that transmits position confirmation radiation, uniform radiation, and position confirmation light and blocks light in a part of the wavelength region in the visible wavelength region. As shown in FIG. 12, the position confirmation light Lp1 is light ranging from green to red with a wavelength of 495 nm to 780 nm having a peak light intensity at a wavelength of 625 nm. In the case of blue light having a peak light intensity ranging from 380 nm to 495 nm, the filter window blocks light of wavelengths 380 nm to 495 nm, which is the wavelength region of the illumination visible light Lr1, and the position confirmation light Lp1. As described above, it has the light transmission characteristic Tf1 that transmits light having a wavelength range of 495 nm to 780 nm. It can measure the optical path positional deviation.
[0040]
In the above embodiment, the storage phosphor panel is irradiated with the position confirmation radiation Xc, the uniform radiation Xb, and the position confirmation light Lp in this order. The irradiation order may be changed in any way as long as the position confirmation light Lp is irradiated after the uniform radiation Xb. For example, the irradiation of the uniform radiation Xb, the irradiation of the position confirmation radiation Xc, and the irradiation of the position confirmation light Lp are performed in this order, or the irradiation of the uniform radiation Xb, the irradiation of the position confirmation light Lp, and the irradiation of the position confirmation radiation Xc. You may make it carry out in this order.
[0041]
Further, the positional relationship recording cassette irradiates the storage phosphor panel 10 disposed at a predetermined position with the position confirmation light Lp in the visible wavelength region after the position confirmation radiation Xc is irradiated. It is assumed that the positional relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp is recorded in the stimulable phosphor panel 10 without performing irradiation with the like radiation Xb. Even if a filter window that transmits at least part of the radiation Xc and at least part of the position confirmation light Lp and blocks light in part of the visible wavelength region is used, the same effect as described above can be obtained. it can. In this case, the step of irradiating the uniform radiation Xb in the above embodiment is omitted, and the positional relationship between the irradiation position of the position confirmation radiation Xc and the irradiation position of the position confirmation light Lp is the stimulable phosphor panel 10. Recorded in.
[0042]
That is, as shown in FIG. 13A, after the position confirmation radiation Xc is irradiated, a thick and short cross-shaped region Rc (irradiation field) is recorded on the stimulable phosphor panel 10, and then the elongated cross-region Rp is applied to the elongated cross-region Rp. The irradiation of the position confirmation light Lp releases the radiation energy accumulated in the area included in the elongated cross area Rp in the thick and short cross-shaped area Rc (see FIG. 13B), and the position confirmation radiation Xc The positional relationship between the irradiation position and the irradiation position of the position confirmation light Lp is recorded in the stimulable phosphor panel 10, and the stimulable phosphor panel 10 in which the optical path position deviation is recorded is a radiation image reader (not shown). ) And the recorded image showing the optical path position deviation is read.
[0043]
As shown in FIG. 14, the image indicating the optical path position deviation read by the radiation image reading device is an image in which the image Gc indicating the position check radiation Xc and the image Gp indicating the position check light Lp are overlapped. The positional relationship between the center position Vc of the image Gc indicating the radiation Xc and the center position Vp of the image Gp indicating the position confirmation light Lp is the optical path position shift. When the positional deviation amount δ indicated by the distance between the center position Vc and the center position Vp is equal to or less than a predetermined allowable amount E, the position confirmation light Lp emitted from the confirmation light irradiation unit 30 is the position confirmation radiation Xc. It can be confirmed that it can be used to indicate the irradiation position.
[0044]
The positional relationship recording cassette is not limited to being used in a radiotherapy apparatus, but is also used for recording an optical path deviation (optical path position deviation) of position confirmation light with respect to a radiation propagation path in a radiographic apparatus or the like. be able to.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of a radiotherapy apparatus according to an embodiment of the present invention. FIG. 2 is a positional relationship recording cassette according to an embodiment of the present invention. Fig. 4 is a side view showing the relationship between the wavelength region and the light transmission characteristics of the filter window. Enlarged side view [Fig. 6] Fig. 7 shows an elongated cross-shaped region where the light reflecting mirror reflects visible light. [Fig. 7] Enlarged side view showing how the position confirmation radiation is emitted from the radiation irradiation unit. FIG. 9 is an enlarged side view showing a state in which uniform radiation is emitted from the radiation irradiating unit. FIG. 10 irradiates position confirmation light from the confirmation light irradiating unit. Enlarged side view showing the situation [Fig. 11 The figure which shows the image showing the position shift of the irradiation position of the position confirmation light with respect to the irradiation position of the position confirmation radiation read from the stimulable phosphor panel. [FIG. 12] Wavelength regions and filters of other position confirmation light and illumination visible light FIG. 13 is a diagram showing the relationship between the light transmission characteristics of the window and FIG. 13 is a diagram showing regions of radiation and visible light recorded on the stimulable phosphor panel. FIG. 14 is a diagram showing the position confirmation radiation read from the stimulable phosphor panel. The figure which shows the image showing the position shift of the irradiation position of the position confirmation light with respect to the irradiation position
DESCRIPTION OF SYMBOLS 10 Storage phosphor panel 15 Cassette for positional relationship recording 16 Filter window 20 Radiation irradiation part 30 Confirmation light irradiation part 40 Positional relationship recording means

Claims (2)

Irradiation of position confirming radiation to the stimulable phosphor panel arranged at a predetermined position, and uniform radiation irradiation to a range including the region on the stimulable phosphor panel irradiated with the position confirming radiation And irradiation of the position confirmation light in the visible wavelength region, and irradiation of the position confirmation light after the irradiation of the uniform radiation, the irradiation position of the position confirmation radiation and the irradiation position of the position confirmation light, A cassette for recording a positional relationship for storing the stimulable phosphor panel, which is used when recording the positional relationship in the stimulable phosphor panel,
A filter window that transmits at least part of the position confirmation radiation, at least part of the uniform radiation, and at least part of the position confirmation light and blocks light in a part of the wavelength region in the visible wavelength region; A cassette for positional relationship recording characterized by the above. Irradiation of the position confirming radiation and the position confirming light are performed by irradiating position confirming light in the visible wavelength region after irradiation of the position confirming radiation to the stimulable phosphor panel arranged at a predetermined position. A cassette for recording a positional relationship containing the stimulable phosphor panel, which is used when recording the positional relationship with the position in the stimulable phosphor panel;
A positional relationship recording cassette comprising a filter window that transmits at least a part of the position confirmation radiation and at least a part of the position confirmation light and blocks light in a part of a wavelength region in a visible wavelength region. .

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