JP2010259489A - Radiation image detecting cassette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily load a cassette on a photographing stand, and to easily carry the cassette without dropping the cassette. <P>SOLUTION: In a cassette type detector 1, a projection T is provided on a side surface 32A which is a side surface of a housing 3 and a sliding surface against the photographing stand. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a radiological image detection cassette.

  In recent years, a digital radiographic image detection apparatus has been used as a method of obtaining a radiographic image by irradiating a subject with radiation and detecting the radiation transmitted through the subject. As such a radiation image detection apparatus, there is a so-called FPD (Flat Panel Detector).

  As an example of an FPD, a plurality of detection elements are two-dimensionally arranged on a substrate, radiation that has passed through a subject is irradiated onto a phosphor (scintillator), and visible light that is emitted according to the amount of irradiated radiation is charged. There is one that obtains a radiographic image by reading the electric charge accumulated in the photoelectric conversion element by converting into the photoelectric conversion element. Such an FPD has immediacy that a radiographic image can be obtained immediately after imaging.

  The X-ray detector described in Patent Document 1 is a portable FPD, and is carried to a predetermined place and used for radiographic imaging. In Patent Document 1, it is disclosed that a protective housing in an X-ray detector is formed of a carbon fiber reinforced plastic material, and a handle is mechanically coupled to the protective housing so that the X-ray detector is portable. It is also disclosed that it supports.

JP 2008-90304 A

  If the protective housing of the X-ray detector is formed of a carbon fiber reinforced plastic material as in the technique described in Patent Document 1, the carbon fiber reinforced plastic material generally has a low coefficient of friction. Etc.), the X-ray detector is smoothly slid and set so that the wearability is good.

  However, if the protective housing of the X-ray detector is made of carbon fiber reinforced plastic material, the user slips when carrying the X-ray detector with the protective housing, and accidentally drops the X-ray detector. May end up. Considering the portability of the X-ray detector, it is conceivable to provide a handle as in the technique described in Patent Document 1. However, in the cassette type FPD according to the standard (JIS) size, within a predetermined size. A board | substrate, a photoelectric conversion element, etc. must be installed, and it is difficult to ensure the space for installing a handle.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a radiation image detection cassette that can be easily mounted on an imaging stand and can be easily carried without being dropped.

In order to achieve the above object, a radiological image detection cassette according to the present invention comprises:
A portable radiographic image detection cassette that can be mounted on an imaging stand and that detects radiation irradiated toward a subject to acquire radiographic image data,
A detection unit for detecting radiation transmitted through the subject;
A radiation incident surface and a side surface orthogonal to the incident surface, the housing containing the detection unit;
A protrusion is provided on a side surface of the housing and on a sliding surface with the photographing stand.

  According to the present invention, the cassette can be easily attached to the photographing stand, and can be easily carried without dropping the cassette.

It is a perspective view which shows a cassette type | mold detector. It is a perspective view of a main-body part. It is a fragmentary perspective view which shows the structure of a main-body part and a 1st cover member. It is sectional drawing of the predetermined location which looked at the cassette type detector shown in FIG. 1 from the a direction. It is sectional drawing which shows the state with which the cassette type | mold detector was mounted | worn with Bucky. It is sectional drawing which shows the state which a user carries a cassette type | mold detector. It is a perspective view of the cassette type detector of the form different from embodiment shown in FIG. It is sectional drawing of the cassette type | mold detector which shows another embodiment.

[Outline of cassette type detector]
FIG. 1 is a perspective view of a cassette type detector 1. A cassette type detector 1 which is a radiation image detection cassette is a cassette type flat panel detector. The cassette-type detector 1 includes a radiation detection unit 2 (see FIG. 4) that detects irradiated radiation and acquires it as digital image data, and a housing (housing) 3 in which the radiation detection unit 2 is built. . The housing 3 includes a main body portion 31, a first lid member 32 and a second lid member 33 that block the opening of the main body portion 31.

  In this embodiment, the housing 3 is formed so that the thickness in the radiation incident direction is 15 mm. The thickness of the housing 3 in the radiation incident direction is 16 mm or less, and is within the range of the size (15 mm + 1 mm and 15 mm-2 mm) according to the JIS standard (JIS Z 4905) in the conventional screen / film cassette. (The international standard corresponding to JIS Z 4905 is IEC 60406).

  FIG. 2 is a perspective view of the main body 31. The main body 31 is made of carbon (for example, carbon fiber reinforced plastic: CFRP), and is lightweight and excellent in strength. Also, the X-ray transmittance is good. As shown in FIG. 2, the main body 31 has a hollow cylindrical shape and is formed so as to maintain the strength of the cassette type detector 1. There are openings 31A and 31B on both sides of the main body 31. The opening 31A is closed by the first lid member 32, and the opening 31B is closed by the second lid member 33 (see FIG. 1).

  FIG. 3 is a partial perspective view showing the structure of the main body 31 and the first lid member 32 as seen from an angle different from those in FIGS. 1 and 2. The insertion portion 32 </ b> B of the first lid member 32 has a structure that enters the interior of the main body 31 when the opening 31 </ b> A (see FIG. 2) of the main body 31 is closed by the first lid member 32. On the other hand, the outer wall 32 </ b> C of the first lid member 32 does not enter the interior of the main body 31 even if the opening 31 </ b> A of the main body 31 is blocked by the first lid member 32, and constitutes the exterior of the housing 3. It has become. That is, a part of the first lid member 32 enters the inside of the main body portion 31, and both ends of the first lid member 32 do not enter the inside of the main body portion 31.

  The first lid member 32 and the second lid member 33 have substantially the same shape, and the openings 31A and 31B have the first lid member 32 and the second lid by the structure described in FIG. The member 33 is closed. The first lid member 32 and the second lid member 33 are made of a hard resin (for example, ABS resin) having a low friction coefficient.

[Internal structure of cassette type detector]
Next, the internal structure of the cassette type detector 1 will be described. FIG. 4 is a cross-sectional view of a predetermined portion of the cassette type detector 1 shown in FIG.

  As shown in FIG. 4, the radiation detection unit 2 includes a detection unit 21, a base 22, and electrical components (a relay board 23A, a control board 23B, a rechargeable battery 24 (for example, a lithium ion capacitor)). In the present embodiment, the detection unit 21 is supported on the upper surface of the base 22, and a plurality of electrical components such as the control board 23 </ b> B and the rechargeable battery 24 are attached to the lower surface of the base 22. .

  The base 22 is flexible and is made of resin. The material of the base 22 is, for example, a resin in which polycarbonate and ABS are mixed. The base 22 supports the glass substrate 213, and although not shown in FIG. 3, a thin lead layer is interposed between the base 22 and the glass substrate 213.

  The detection unit 21 includes a scintillator 211, a detection unit 212, a glass substrate 213, a counter substrate 214, and the like. The basic structure of the detection unit 21 will be described. The detection unit 212 is installed on the glass substrate 213, and the scintillator 211 is installed above the detection unit 212. A counter substrate 214 is installed above the scintillator 211, and the scintillator 211 is sandwiched between the counter substrate 214 and the glass substrate 213. The glass substrate 213 and the counter substrate 214 are both substrates having a thickness of about 0.6 mm, for example.

  The scintillator 211 has a function of converting incident radiation into light. The scintillator 211 has, for example, a phosphor as a main component, and outputs an electromagnetic wave having a wavelength of 300 nm to 800 nm, that is, an electromagnetic wave (light) ranging from ultraviolet light to infrared light centering on visible light, based on incident radiation. It has become.

  The detection unit 212 converts the electromagnetic wave (light) output from the scintillator 211 into electric energy and accumulates it, and outputs an electric signal based on the accumulated electric energy. The electrical signal generated by the detection unit 212 is sent to the first relay board 23A by a flexible harness (not shown).

  A buffer material 215 is installed at the end of the base 22 and above the counter substrate 214.

  As described above, by using the cassette type detector 1 shown in FIGS. 1 to 3, it is possible to detect a radiographic image of a subject.

[Housing protrusion]
Next, the protrusion T provided on the side surface of the housing 3 will be described.

  When the cassette-type detector 1 is mounted on an imaging table (such as Bucky), the side surface 32A (see FIG. 1) of the first lid member 32 is mounted by sliding on the imaging table (the side surface 32A is the housing 3). Among these surfaces, the normal direction is a surface orthogonal to the radiation direction (direction b in FIG. 1) and the sliding surface of the cassette type detector 1 with respect to the imaging table). Further, in the cassette type detector 1 in the present embodiment, a protrusion T is provided on the side surface 32A.

  FIG. 5 is a cross-sectional view showing a state where the cassette type detector 1 is attached to the bucky S. In FIG. 5, only the main body 31 and the first lid member 32 are shown for the cassette type detector 1, and the detection unit 21 and the like inside the cassette type detector 1 are omitted.

  As shown in FIG. 5, the cassette type detector 1 is mounted vertically on the Bucky S (the cassette type detector 1 is mounted on the Bucky S after moving from the front side to the back side in FIG. 5). . A projection T is provided on the side surface 32A of the first lid member 32, the projection T slides on the installation surface S1 of the bucky S, and the cassette type detector 1 is attached to the bucky S. Since the projection T is provided on the side surface 32A, the sliding area between the cassette type detector 1 and the bucky S is reduced, and the cassette type detector 1 is smoothly slid and attached to the bucky S. Will be.

  FIG. 6 is a cross-sectional view showing a state in which the user carries the cassette type detector 1. Since the first lid member 32 is formed of a resin having a low coefficient of friction, as shown in FIG. 6, when the user carries the cassette-type detector 1 vertically and carries the first lid member 32 portion. Hands slip easily. However, since the protrusion T is provided on the side surface 32A, it is possible to prevent the protrusion T from being caught on the user's finger (H in FIG. 6) and slipping the hand to drop the cassette type detector 1. it can.

  As described above, by providing the projection T on the side surface 32A, the cassette type detector 1 can be easily attached to the photographing stand, and the cassette type detector 1 can be easily carried without dropping. In particular, in the cassette type detector 1 having a size conforming to the standard as in the present embodiment, the detection unit 21 and the like must be installed within a predetermined size, and a handle that is a part of the user is installed. Since it is difficult to secure a space, it is more effective to apply the present invention to a cassette type detector having a size conforming to the standard.

  FIG. 7 is a perspective view of a cassette type detector 1 having a different form from the embodiment shown in FIG. Unlike the embodiment shown in FIG. 1, the cassette type detector 1 of the embodiment shown in FIG. As described with reference to FIG. 6, when the cassette type detector 1 is placed vertically and the user carries the first lid member 32, the projection T is caught on the user's finger (H in FIG. 6). . Therefore, by providing a plurality of projections T on the side surface 32A, the portion that is caught by the user's finger is increased, and the cassette type detector 1 can be more easily carried without slipping the hand.

  FIG. 8 is a cross-sectional view of a cassette type detector 1 showing still another embodiment. In FIG. 8, the detection unit 21 and the like inside the cassette type detector 1 are omitted.

  In the cassette type detector 1 shown in FIG. 8, a portion between the end X and the projection T of the side surface 32 </ b> A is constituted by a protective cover U indicated by hatching. The protective cover U has a higher friction coefficient than the protrusion T and is formed of a soft material such as an elastomer (the protrusion T is formed of a hard resin (for example, ABS resin) having a low friction coefficient).

  Since the end portion of the side surface 32A is constituted by the protective cover U, as described in FIG. 6, when the cassette type detector 1 is placed vertically and the user carries the portion of the first lid member 32, a grip is provided. The feeling increases and the cassette type detector 1 can be made easier to carry without slipping the hand in combination with the protrusion T. Further, even when the cassette type detector 1 is accidentally dropped, the protective cover U serves as a cushioning material to absorb the impact applied to the cassette type detector 1 and prevent the cassette type detector 1 from being damaged. I can do it.

  As mentioned above, although this invention was demonstrated by embodiment shown in FIGS. 1-8, this invention is not limited to the said embodiment, Even if there exists a change and addition in the range which does not deviate from the summary of this invention. It is included in the present invention.

DESCRIPTION OF SYMBOLS 1 Cassette type detector 2 Radiation detection part 3 Housing 21 Detection unit 22 Base 211 Scintillator 212 Detection part 213 Glass substrate 214 Opposite substrate T Protrusion

Claims (3)

A portable radiographic image detection cassette that can be mounted on an imaging stand and that detects radiation irradiated toward a subject to acquire radiographic image data,
A detection unit for detecting radiation transmitted through the subject;
A radiation incident surface and a side surface orthogonal to the incident surface, the housing containing the detection unit,
A radiation image detection cassette, wherein a projection is provided on a side surface of the housing and a sliding surface with the imaging table.   The radiographic image detection cassette according to claim 1, wherein a plurality of the protrusions are provided on the same surface.   The radiographic image detection cassette according to claim 1, wherein an end of the side surface is formed of a material having a higher friction coefficient than the protrusion.

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