JP2014069043A - Top board for medical image diagnostic apparatus - Google Patents

Top board for medical image diagnostic apparatus Download PDF

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JP2014069043A
JP2014069043A JP2012220329A JP2012220329A JP2014069043A JP 2014069043 A JP2014069043 A JP 2014069043A JP 2012220329 A JP2012220329 A JP 2012220329A JP 2012220329 A JP2012220329 A JP 2012220329A JP 2014069043 A JP2014069043 A JP 2014069043A
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exterior
top plate
medical image
diagnostic apparatus
image diagnostic
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JP6104552B2 (en
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Toyomasa Honda
豊正 本多
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Toshiba Corp
Canon Medical Systems Corp
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Toshiba Corp
Toshiba Medical Systems Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a top board for a medical image diagnostic apparatus which can be used for adults and infants and reduces image quality deterioration.SOLUTION: A top board for a medical image diagnostic apparatus 1 has a package 5 and a filler 3. Portions 51, 53 of the package 5 have radiation absorption coefficients lower than that of the other portion 55 of the package 5.

Description

本発明の実施形態は、医用画像診断装置に用いられる天板に関する。   Embodiments described herein relate generally to a top board used in a medical image diagnostic apparatus.

従来、医用画像診断装置の寝台に用いられている天板は、被検体が成人であることを前提として設計され、製品化されている。このため、天板には、ある程度の重量に耐えるための強度が要求される。また、天板の外装及び充填材には、例えば図１１に示すように、それぞれ同一でかつ均一な材料が使用されている。以下、医用画像診断装置として、例えばＸ線コンピュータ断層撮影（Ｃｏｍｐｕｔｅｄ Ｔｏｍｏｇｒａｐｈｙ：以下、ＣＴと呼ぶ）装置について述べる。   Conventionally, a couch used for a bed of a medical diagnostic imaging apparatus is designed and commercialized on the assumption that the subject is an adult. For this reason, the top plate is required to have strength to withstand a certain amount of weight. In addition, as shown in FIG. 11, for example, the same and uniform materials are used for the exterior and filler of the top plate. Hereinafter, as a medical image diagnostic apparatus, for example, an X-ray computed tomography (hereinafter referred to as CT) apparatus will be described.

成人に比べて体の小さい乳幼児をＣＴ検査する場合、乳幼児の体の厚みは成人の体の厚みに比べて薄い。このため、天板を透過したＸ線に関するビュー数が増加する。加えて、Ｘ線の減弱度合いに対する天板のＸ線吸収の寄与が大きくなる。これらのことから、乳幼児を透過した透過Ｘ線の減少は、成人を透過した透過Ｘ線の減少に比べて大きくなる。すなわち、乳幼児を検査する場合、天板のＸ線吸収によるビューごとの投影データの不均一性は、成人の場合に比べて大きくなる。従って、乳幼児の医用画像の画質が成人の医用画像の画質に比べて劣化する問題がある。   When a CT examination is performed on an infant whose body is smaller than that of an adult, the thickness of the infant's body is thinner than that of an adult. For this reason, the number of views related to the X-rays transmitted through the top plate increases. In addition, the contribution of X-ray absorption of the top plate to the degree of attenuation of X-rays increases. For these reasons, the decrease in transmitted X-rays transmitted through the infant is larger than the decrease in transmitted X-rays transmitted through the adult. That is, when examining an infant, the non-uniformity of projection data for each view due to X-ray absorption of the top plate is larger than that for an adult. Therefore, there is a problem that the quality of the medical image of the infant is deteriorated compared to the quality of the adult medical image.

さらに、乳幼児は成人に比べて被曝の影響が大きいため、成人に比べてより被曝を低減させる必要がある。このため、乳幼児のＣＴ検査において発生されるＸ線強度は、成人の場合に比べて、より低くする必要がある。このことは、先の画質劣化を助長する。   Furthermore, since the effects of exposure are greater on infants than on adults, it is necessary to reduce exposure more than adults. For this reason, the X-ray intensity generated in the CT examination of infants needs to be lower than in the case of adults. This promotes the previous image quality degradation.

乳幼児の医用画像の劣化を解消するために、天板の外装として、Ｘ線吸収係数が小さい材料（以下、低Ｘ線吸収材料と呼ぶ）を天板に用いることができる。しかしながら、低Ｘ線吸収材料は強度が低いため、成人を支えることができない問題がある。   In order to eliminate the deterioration of the medical image of the infant, a material having a small X-ray absorption coefficient (hereinafter referred to as a low X-ray absorption material) can be used for the top plate as the exterior of the top plate. However, since the low X-ray absorption material has low strength, there is a problem that it cannot support an adult.

目的は、成人および乳幼児に使用可能な天板であって、乳幼児の医用画像の画質劣化を低減する医用画像診断装置用天板を提供することにある。   An object of the present invention is to provide a top plate that can be used for adults and infants, and that can reduce deterioration in image quality of medical images of infants.

本実施形態に係る医用画像診断装置用天板は、外装と充填材とを具備し、前記外装の一部分は、前記外装の他の部分よりも低い放射線吸収係数を有すること、を特徴とする。   The medical image diagnostic apparatus top plate according to the present embodiment includes an exterior and a filler, and a portion of the exterior has a lower radiation absorption coefficient than other portions of the exterior.

図１は、本実施形態に係る医用画像診断装置用天板の概要の一例を示す概要図である。FIG. 1 is a schematic diagram showing an example of an outline of a top plate for a medical image diagnostic apparatus according to the present embodiment. 図２は、本実施形態に係り、図１のａ−ａ’の断面の一例を示す断面図である。FIG. 2 is a cross-sectional view illustrating an example of a cross section taken along line a-a ′ of FIG. 1 according to the present embodiment. 図３は、本実施形態に係り、図１のｃ−ｃ’の断面の一例を示す断面図である。FIG. 3 is a cross-sectional view showing an example of a cross section taken along line c-c ′ of FIG. 1 according to the present embodiment. 図４は、本実施形態を寝台に装備した一例を示す図である。FIG. 4 is a diagram illustrating an example in which the present embodiment is installed in a bed. 図５は、寝台に装備された本実施形態を、ガントリに挿入した一例を示す図である。FIG. 5 is a diagram showing an example in which the present embodiment mounted on a bed is inserted into a gantry. 図６は、本実施形態の第１の変形例に係る医用画像診断装置用天板の概要の一例を示す概要図である。FIG. 6 is a schematic diagram illustrating an example of an outline of a top plate for a medical image diagnostic apparatus according to a first modification of the present embodiment. 図７は、本実施形態の第１の変形例に係り、図６のａ−ａ’の断面の一例を示す断面図である。FIG. 7 is a cross-sectional view showing an example of a cross section taken along line a-a ′ of FIG. 6 according to the first modification of the present embodiment. 図８は、本実施形態の第１の変形例に係り、図６のｃ−ｃ’の断面の一例を示す断面図である。FIG. 8 is a cross-sectional view illustrating an example of a cross section taken along line c-c ′ of FIG. 6 according to the first modification of the present embodiment. 図９は、本実施形態の第２の変形例に係る医用画像診断装置用天板の概要の一例を示す概要図である。FIG. 9 is a schematic diagram showing an example of an outline of a top plate for a medical image diagnostic apparatus according to a second modification of the present embodiment. 図１０は、本実施形態の第２の変形例に係る医用画像診断装置用天板の概要の一例を示す概要図である。FIG. 10 is a schematic diagram showing an example of an outline of a top plate for a medical image diagnostic apparatus according to a second modification of the present embodiment. 図１１は、従来の天板を示す図である。FIG. 11 is a view showing a conventional top plate.

以下、医用画像診断装置用天板の実施形態について図面を参照しながら説明する。以下、説明を簡単にするために、医用画像診断装置は、Ｘ線コンピュータ断層撮影（Ｃｏｍｐｕｔｅｄ Ｔｏｍｏｇｒａｐｈｙ：以下、ＣＴと呼ぶ）装置であるとする。なお、本実施形態は、Ｘ線ＣＴ装置以外にもＸ線診断装置、核医学診断装置等にも使用可能である。以下の説明において、略同一の機能及び構成を有する構成要素については、同一符号を付し、重複説明は必要な場合にのみ行う。   Hereinafter, embodiments of a top plate for a medical image diagnostic apparatus will be described with reference to the drawings. Hereinafter, in order to simplify the explanation, it is assumed that the medical image diagnostic apparatus is an X-ray computed tomography (hereinafter referred to as CT) apparatus. In addition, this embodiment can be used not only for an X-ray CT apparatus but also for an X-ray diagnostic apparatus, a nuclear medicine diagnostic apparatus, and the like. In the following description, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.

図１は、本実施形態に係る医用画像診断装置用天板１の概要の一例を示す概要図である。本実施形態に係る医用画像診断装置用天板１は、充填材３と外装５とを有する。充填材３は、均一な材料から構成される。充填材３の材料は、例えば、発泡ウレタンである。   FIG. 1 is a schematic diagram showing an example of an outline of a top plate 1 for a medical image diagnostic apparatus according to this embodiment. A top plate 1 for a medical image diagnostic apparatus according to this embodiment includes a filler 3 and an exterior 5. The filler 3 is composed of a uniform material. The material of the filler 3 is, for example, urethane foam.

外装５は、充填材３の周囲に設けられる。具体的には、外装５の一部分５１、５３は、充填材３を挟んで相対する上面と下面とのうち少なくとも一方に設けられる。以下、外装の一部分５１、５３は、充填材３の上面と下面とに設けられるものとする。外装５の一部分５１、５３は、後述する外装５の他の部分５５よりも低いＸ線吸収係数（以下、低Ｘ線吸収係数と呼ぶ）を有する。外装５の一部分５１、５３は、例えば、充填材３の短軸方向の中央部分に位置する。加えて、外装５の一部分５１、５３は、充填材３の長軸方向の中央部分の両端のうちいずれか一方の端部分に位置する。これにより、本医用画像診断装置用天板１の強度を維持することができる。外装５の一部分５１、５３における長軸方向の長さは、乳幼児の体長、または成人の頭部（例えば、５０ｃｍ）程度の長さである。外装５の一部分５１、５３における短軸方向の長さは、乳幼児の体幅、または成人の頭部幅程度の長さである。外装５の一部分５１、５３は、外装５の他の部分５５より低いＸ線吸収係数の材料（以下、第１材料と呼ぶ）により構成される。第１材料は、例えば、塩化ビニールである。なお、第１材料は、炭素を含まない強化プラスチックであってもよい。   The exterior 5 is provided around the filler 3. Specifically, the portions 51 and 53 of the exterior 5 are provided on at least one of the upper surface and the lower surface that face each other with the filler 3 interposed therebetween. Hereinafter, the exterior portions 51 and 53 are provided on the upper surface and the lower surface of the filler 3. The portions 51 and 53 of the exterior 5 have an X-ray absorption coefficient (hereinafter referred to as a low X-ray absorption coefficient) lower than other portions 55 of the exterior 5 described later. The portions 51 and 53 of the exterior 5 are located, for example, in the central portion of the filler 3 in the minor axis direction. In addition, the portions 51 and 53 of the exterior 5 are located at either one of the ends of the central portion of the filler 3 in the long axis direction. Thereby, the intensity | strength of the top plate 1 for this medical image diagnostic apparatus can be maintained. The length in the major axis direction of the portions 51 and 53 of the exterior 5 is about the length of an infant or the head of an adult (for example, 50 cm). The length in the minor axis direction of the portions 51 and 53 of the exterior 5 is about the body width of an infant or the head of an adult. The portions 51 and 53 of the exterior 5 are made of a material having an X-ray absorption coefficient lower than that of the other portion 55 of the exterior 5 (hereinafter referred to as a first material). The first material is, for example, vinyl chloride. The first material may be a reinforced plastic that does not contain carbon.

外装５の他の部分５５は、例えば、炭素繊維強化プラスチック（Ｃａｒｂｏｎ Ｆｉｂｅｒ Ｒｅｉｎｆｏｒｃｅｄ Ｐｌａｓｔｉｃ：以下、ＣＦＲＰと呼ぶ）により構成される。外装５の他の部分５５の材質及び厚みは一定、すなわち均一である。外装５の他の部分５５は、医用画像診断装置用天板１の強度を担う。以下、外装５の他の部分５５に用いられる材料を第２材料と呼ぶ。   The other part 55 of the exterior 5 is made of, for example, carbon fiber reinforced plastic (hereinafter referred to as CFRP). The material and thickness of the other portion 55 of the exterior 5 are constant, that is, uniform. The other part 55 of the exterior 5 bears the strength of the top plate 1 for the medical image diagnostic apparatus. Hereinafter, the material used for the other part 55 of the exterior 5 is referred to as a second material.

図２は、図１のａ−ａ’の断面の一例を示す断面図である。外装５の一部分５１、５３は、ｂとｂ’とに挟まれた間隔において、充填材３の上面と下面とに設けられる。図３は、図１のｃ−ｃ’の断面の一例を示す断面図である。外装５の一部分５１、５３は、ｄとｄ’とに挟まれた間隔において、充填材３の上面と下面とに設けられる。なお、外装５の一部分５１の相対する領域、すなわち外装５の一部分５３に相当する領域において、充填材３は露出されていてもよい。   FIG. 2 is a cross-sectional view showing an example of a cross section a-a ′ of FIG. 1. The portions 51 and 53 of the exterior 5 are provided on the upper surface and the lower surface of the filler 3 at an interval between b and b ′. FIG. 3 is a cross-sectional view illustrating an example of a cross section taken along line c-c ′ of FIG. 1. The portions 51 and 53 of the exterior 5 are provided on the upper surface and the lower surface of the filler 3 at an interval between d and d ′. In addition, the filler 3 may be exposed in a region where the part 51 of the exterior 5 faces, that is, a region corresponding to the part 53 of the exterior 5.

図４は、本実施形態の医用画像診断装置用天板１を寝台７に装備した一例を示す図である。図４の矢印は、本医用画像診断装置用天板１が寝台７から張り出される方向を示している。図４における外装５の一部分５１は、矩形ＡＢＣＤで示されている。図４の矩形ＡＢＣＤは、図１の矩形ＡＢＣＤに対応する。外装５の一部分５１は、天板の張り出し方向の前方部分であって、本医用画像診断装置用天板１の短軸方向の略中央部分に配置される。図５は、寝台７に装備された本実施形態をガントリ９に挿入した断面の一例を示す図である。なお、図１、図２、図３、図５において、外装５の一部分５３に相当する領域において、充填材３は露出されていてもよい。   FIG. 4 is a diagram showing an example in which the bed 7 is equipped with the top plate 1 for the medical image diagnostic apparatus of the present embodiment. The arrows in FIG. 4 indicate the direction in which the medical image diagnostic apparatus top plate 1 projects from the bed 7. A portion 51 of the exterior 5 in FIG. 4 is indicated by a rectangle ABCD. The rectangle ABCD in FIG. 4 corresponds to the rectangle ABCD in FIG. A portion 51 of the exterior 5 is a front portion in the protruding direction of the top plate, and is disposed at a substantially central portion in the short axis direction of the top plate 1 for the medical image diagnostic apparatus. FIG. 5 is a view showing an example of a cross section in which the present embodiment mounted on the bed 7 is inserted into the gantry 9. 1, 2, 3, and 5, the filler 3 may be exposed in a region corresponding to a portion 53 of the exterior 5.

（第１の変形例）
図６は、本実施形態の第１の変形例に係る医用画像診断装置用天板１の概要の一例を示す概要図である。実施形態との相違は、外装５の一部分５１の厚みが、外装５の他の部分５５の厚みより薄いことにある。図７は、第１の変形例に係り、図６のａ−ａ’の断面の一例を示す断面図である。図８は、第１の変形例に係り、図６のｃ−ｃ’の断面の一例を示す断面図である。図７、図８に示すように、外装５の一部分５１、５３の厚みは、外装５の他の部分５５の厚みに比べて薄い。図７、図８に示すように、外装５の一部分５１、５３に挟まれた部分の充填材の厚み３１は、充填材の他の部分の厚み３３に比べて厚くなる。 (First modification)
FIG. 6 is a schematic diagram showing an example of an outline of the top plate 1 for a medical image diagnostic apparatus according to a first modification of the present embodiment. The difference from the embodiment is that the thickness of the part 51 of the exterior 5 is thinner than the thickness of the other part 55 of the exterior 5. FIG. 7 is a cross-sectional view illustrating an example of a cross section taken along the line aa ′ of FIG. 6 according to the first modification. FIG. 8 is a cross-sectional view illustrating an example of a cross section taken along line cc ′ of FIG. 6 according to the first modification. As shown in FIGS. 7 and 8, the thickness of the portions 51 and 53 of the exterior 5 is thinner than the thickness of the other portion 55 of the exterior 5. As shown in FIGS. 7 and 8, the thickness 31 of the filler between the portions 51 and 53 of the exterior 5 is thicker than the thickness 33 of the other portion of the filler.

（第２の変形例）
図９は、本実施形態の第２の変形例に係る医用画像診断装置用天板１の概要の一例を示す概要図である。実施形態との相違は、外装５の一部分５１が第１材料５７と第２材料５９とが混在していることにある。図９に示すように、外装５の一部分５７は、第１材料５７と第２材料５９とにより、縞状の形状を有する。第１材料５７は、縞の間隔に配置される。なお、図示していないが、充填材３を挟んで外装５の一部分５１に相対する外装の一部分に、外装５の一部分５１と同様な形状を配置することも可能である。 (Second modification)
FIG. 9 is a schematic diagram showing an example of an outline of the top plate 1 for a medical image diagnostic apparatus according to a second modification of the present embodiment. The difference from the embodiment is that the first material 57 and the second material 59 are mixed in a part 51 of the exterior 5. As shown in FIG. 9, the portion 57 of the exterior 5 has a striped shape due to the first material 57 and the second material 59. The 1st material 57 is arrange | positioned at the space | interval of a stripe. Although not shown, it is also possible to arrange a shape similar to that of the portion 51 of the exterior 5 on a portion of the exterior facing the portion 51 of the exterior 5 with the filler 3 interposed therebetween.

図１０は、本実施形態の第２の変形例に係る医用画像診断装置用天板１の概要の一例を示す概要図である。図１０に示すように、外装５の一部分５１において、第１材料５７と第２材料５９とにより、格子状の形状を有する。第１材料５７は、格子間隔に配置される。なお、図示していないが、充填材３を挟んで外装５の一部分５１に相対する外装の一部分に、外装５の一部分５１と同様な形状を配置することも可能である。また、外装５の一部分５１は格子状の形状を有し、充填材３を挟んで外装５の一部分５１に相対する外装の一部分は、図９のような縞状の形状を有していてもよい。なお、充填材３を挟んで相対する２つの外装の一部分は、充填材３の上面側に縞状、下面側に格子状の形状で配置させてもよい。   FIG. 10 is a schematic diagram showing an example of an outline of the top plate 1 for a medical image diagnostic apparatus according to a second modification of the present embodiment. As shown in FIG. 10, the first material 57 and the second material 59 have a lattice shape in the part 51 of the exterior 5. The first material 57 is arranged at a lattice interval. Although not shown, it is also possible to arrange a shape similar to that of the portion 51 of the exterior 5 on a portion of the exterior facing the portion 51 of the exterior 5 with the filler 3 interposed therebetween. Further, a portion 51 of the exterior 5 has a lattice shape, and a portion of the exterior facing the portion 51 of the exterior 5 across the filler 3 may have a striped shape as shown in FIG. Good. A part of the two exteriors facing each other with the filler 3 interposed therebetween may be arranged in a stripe shape on the upper surface side of the filler material 3 and in a lattice shape on the lower surface side.

以上に述べた構成によれば、以下の効果を得ることができる。
本実施形態における医用画像診断装置用天板１によれば、強度を維持しつつ、外装５の一部分５１、５３のＸ線吸収係数を、外装５の他の部分５５よりも低いＸ線吸収係数にすることができる。これにより、本医用画像診断装置用天板１によれば、体重の軽い乳幼児（例えば５ｋｇ程度）を支持し、かつＸ線吸収係数を低減できるため、乳幼児に対するＸ線ＣＴ検査において発生される医用画像の画質が向上する。さらに、成人のＸ線ＣＴ検査においては、外装５の一部分５１は、頭部またはつま先となるため、十分な強度を維持することができる。以上のことから、本医用画像診断装置用天板１によれば、成人のＸ線ＣＴ検査に支障をきたさずに、乳幼児の検査において画質の劣化を低減することができる。加えて、乳幼児に対して照射されるＸ線の強度を低減できるため、乳幼児に対する被曝の低減を図ることができる。 According to the configuration described above, the following effects can be obtained.
According to the top plate 1 for the medical image diagnostic apparatus in the present embodiment, the X-ray absorption coefficient of the portions 51 and 53 of the exterior 5 is lower than the other portions 55 of the exterior 5 while maintaining the strength. Can be. Thereby, according to the top plate 1 for the medical image diagnostic apparatus, it is possible to support a light infant (for example, about 5 kg) and reduce the X-ray absorption coefficient. The image quality is improved. Furthermore, in an adult X-ray CT examination, the portion 51 of the outer sheath 5 is a head or a toe, so that sufficient strength can be maintained. From the above, according to the top plate 1 for the medical image diagnostic apparatus, it is possible to reduce the deterioration of the image quality in the examination of the infant without affecting the adult X-ray CT examination. In addition, since the intensity of X-rays irradiated to the infant can be reduced, the exposure to the infant can be reduced.

本実施形態の第１変形例における医用画像診断装置用天板１によれば、外装５の一部分５１、５３の厚みを、外装５の他の部分５５より薄く構成することができる。これにより、外装５の一部分５１、５３のＸ線吸収係数を、外装５の他の部分５５のＸ線吸収係数よりも低くすることができ、かつ本医用画像診断装置用天板１の強度を、実施形態に比べて向上させることができる。   According to the top plate 1 for a medical image diagnostic apparatus in the first modification of the present embodiment, the thickness of the portions 51 and 53 of the exterior 5 can be made thinner than the other portions 55 of the exterior 5. Thereby, the X-ray absorption coefficient of the parts 51 and 53 of the exterior 5 can be made lower than the X-ray absorption coefficient of the other part 55 of the exterior 5, and the strength of the top plate 1 for the medical diagnostic imaging apparatus can be increased. This can be improved compared to the embodiment.

本実施形態の第２の変形例における医用画像診断装置用天板１によれば、外装５の一部分５１において、ＣＦＲＰである第１材料５７と、第２材料５９とを混在させることができる。これにより、外装５の一部分５１のＸ線吸収係数を、外装５の他の部分５５のＸ線吸収係数よりも低くすることができ、かつ本医用画像診断装置用天板１の強度を、実施形態、第１の変形例に比べてさらに向上させることができる。   According to the top plate 1 for the medical image diagnostic apparatus in the second modification of the present embodiment, the first material 57 that is CFRP and the second material 59 can be mixed in a part 51 of the exterior 5. Thereby, the X-ray absorption coefficient of the part 51 of the exterior 5 can be made lower than the X-ray absorption coefficient of the other part 55 of the exterior 5, and the strength of the top plate 1 for the medical image diagnostic apparatus is implemented. The form and the first modification can be further improved.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１…医用画像診断装置用天板、３…充填材、５…外装、７…寝台、９…ガントリ、３１…外装の一部分に挟まれた部分の充填材の厚み、３３…充填材の他の部分の厚み、５１…外装の一部分、５３…外装の一部分、５５…外装の他の部分、５７…第１材料、５９…第２材料   DESCRIPTION OF SYMBOLS 1 ... Top plate for medical image diagnostic apparatuses, 3 ... Filler, 5 ... Exterior, 7 ... Bed, 9 ... Gantry, 31 ... Thickness of filler in a part of the exterior, 33 ... Other filler Thickness of part 51 ... Part of exterior, 53 ... Part of exterior, 55 ... Other part of exterior, 57 ... First material, 59 ... Second material

Claims (7)

外装と充填材とを具備し、
前記外装の一部分は、前記外装の他の部分よりも低い放射線吸収係数を有すること、
を特徴とする医用画像診断装置用天板。 An exterior and a filler,
A portion of the sheath has a lower radiation absorption coefficient than other portions of the sheath;
A top plate for a medical diagnostic imaging apparatus. 前記外装の一部分は、前記充填材の短軸方向の中央部分に位置すること、
を特徴とする請求項１に記載の医用画像診断装置用天板。 A portion of the exterior is located in a central portion in the minor axis direction of the filler;
The top plate for a medical image diagnostic apparatus according to claim 1. 前記外装の一部分は、前記充填材の長軸方向の端部分に位置すること、
を特徴とする請求項２に記載の医用画像診断装置用天板。 A portion of the exterior is located at an end of the filler in the longitudinal direction;
The top plate for a medical image diagnostic apparatus according to claim 2. 前記外装の一部分の厚みは、前記他の部分の厚みよりも薄いこと、
を特徴とする請求項３に記載の医用画像診断装置用天板。 The thickness of a part of the exterior is thinner than the thickness of the other part,
The top plate for a medical image diagnostic apparatus according to claim 3. 前記充填材は、前記外装の一部分に相対する領域において露出されていること、
を特徴とする請求項１に記載の医用画像診断装置用天板。 The filler is exposed in a region facing a portion of the exterior;
The top plate for a medical image diagnostic apparatus according to claim 1. 外装と充填材とを具備し、
前記外装の一部分において、前記外装の他の部分よりも低い放射線吸収係数を有する第１材料と、前記他の部分を構成する第２材料とが混在し、
前記外装の他の部分は、均一な第２材料により構成されること、
を特徴とする医用画像診断装置用天板。 An exterior and a filler,
In a part of the exterior, a first material having a lower radiation absorption coefficient than other parts of the exterior and a second material constituting the other part are mixed,
The other part of the exterior is composed of a uniform second material,
A top plate for a medical diagnostic imaging apparatus. 前記外装の一部分における前記第２材料は格子状または縞状の形状を有し、前記格子状の格子間隔または前記縞状の縞間隔には前記第１材料が充填されること、
を特徴とする請求項６に記載の医用画像診断装置用天板。 The second material in a portion of the exterior has a lattice shape or a stripe shape, and the lattice material interval of the lattice shape or the stripe interval of the stripe shape is filled with the first material,
The top plate for a medical image diagnostic apparatus according to claim 6.
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