JP4686338B2 - Radiation exposure control indicator band - Google Patents

Description

  The present invention relates to a radiation exposure management indicator band that is used for confirming the safety of a patient undergoing radiation medical care or a worker performing radiation irradiation, and that manages the dose and position of the patient.

  Medical treatment using radiation such as X-ray is to accurately determine or locally treat a lesion. For radiological treatment, radiation therapy for irradiating malignant tumor lesions from outside the body and minimally invasive interventional radiology (irradiational radiology: irradiating radiation from the back side by a percutaneous technique under the guidance of radiographic images: Treatment methods such as IVR) therapy are being performed.

  To accurately detect and predict the exposure dose at a specific part of the patient and avoid excessive double exposure at the same part so that the patient will not be exposed excessively or cause radiation damage during radiotherapy Therefore, it is important to strictly manage the exposure.

  For this management, as disclosed in Patent Document 1, a radiation-sensitive composition-coated sheet that displays the exposure amount by changing the color tone according to the exposure amount is used. Since this sheet changes in color as the radiation exposure amount increases, the exposure amount is displayed in the vicinity of the radiation exposure position by a wide range of tone variations of similar colors that are easily misidentified. Even if such an unclear color change is observed, it is difficult to take the correspondence between the specific position of the skin near the irradiation position of the patient and the gradation color change that should be taken care of most when performing radiological care. It is difficult to accurately and precisely manage the exposure dose to the position.

  In addition, when each sheet is simply attached to a surgical gown or a surgical cap, it is difficult to accurately and strictly manage the exposure dose to an arbitrary position.

JP 2005-502051 gazette

  The present invention has been made to solve the above-mentioned problems, and can be easily attached and detached when performing radiation medical care on a patient, and it is easy to clearly and easily confirm the radiation exposure amount and exposure position at any part of the body. An indicator band is provided for managing exposure by accurately displaying or accurately detecting changes in color tone.

The radiation exposure management indicator band according to claim 1, which has been made to achieve the above object, comprises a layer containing a radiation-changing composition on a cloth wound around a body part to be detected of the radiation exposure amount. Is applied to the site while being fractionated in a grid or stripe pattern, and the radiation-discoloring composition-containing layers of the fractionated adjacent fractions are discolored with different sensitivities and are different. It is formed with the said radiation-color-changing composition which changes in color tone separately .

  The radiation exposure management indicator band according to claim 2 is characterized in that the lattice shape is a grid pattern or the stripes are equally spaced.

  The radiation exposure management indicator band according to claim 3 is characterized in that an identification code is attached to each fractionated fraction.

The radiation exposure management indicator band according to claim 4, wherein the discoloration detects a radiation exposure amount by visually comparing a color tone of each fractionated fraction and a standard color corresponding to the exposure amount. The radiation exposure amount is detected by comparing the color difference of each fractionated fraction and the color difference of another radiation-discoloring composition-containing layer previously exposed according to the exposure amount. Features.

The radiation exposure management indicator band according to claim 5, wherein the radiation-discoloring composition-containing layer is printed on the base material affixed to the fabric with the radiation- discoloring composition , or the radiation-discoloration composition. It is printed directly on the fabric .

  The radiation exposure management indicator band according to claim 6 is characterized in that the cloth is a single long cloth.

  The radiation exposure management indicator band of the present invention is to install an indicator at a site where radiation exposure should be managed, such as a patient's head, neck, shoulders, chest, abdomen, flank, buttocks, armpits, arms or legs. It can be used for patients of any body type and is highly versatile. Moreover, since it is flexible and has a strip shape, it can be easily wound around an arbitrary position while being in close contact with a patient or the like, and can be easily removed. In addition, since the structure is simple and inexpensive, productivity is high.

  Furthermore, since the radiation-changing composition and the radiation detection element are fractionated in a grid pattern or stripe pattern, radiation exposure is applied to the corresponding body surface of the patient, particularly the skin in the vicinity of the irradiation position of the patient to be managed. The amount and position can be accurately detected. Detection of the radiation exposure amount and position is obtained as data representing a change in color tone or digital amount of the radiation-changing composition or radiation detection element. Based on this data, it is possible to manage the data by collecting the radiation exposure at specific three-dimensional parts of the patient's body surface, or to reduce the exposure to the same part of concern during radiological examination it can. It is even more prominent when adjacent radiation fractions are provided with a plurality of radiation-changing compositions that have different sensitivities or change color to different tones.

  Examples of the present invention will be described in detail below, but the scope of the present invention is not limited to these examples.

  The radiation exposure management indicator band 1 will be described with reference to FIG. 1 corresponding to the embodiment.

  FIG. 1 is a rear view of an extended radiation exposure management indicator band. The radiation exposure management indicator band 1 is bent around the arrow and wound around the patient on the front side. The belt 1 is made of a water-absorbing cloth 10. The fabric 10 is horizontally long so that the patient's torso can be wound in a single layer, and tapers as it approaches one end of the horizontally long. The dough 10 has a vertical width that can wrap the back of a patient whose radiation exposure is to be detected.

  In accordance with the back of the patient whose radiation exposure is to be detected, the radiation-changing composition-containing ink layer, which is a radiation exposure detection indicator 11 as a radiation exposure detection material, is disposed on the back side of the fabric 10 near the other side of the horizontally long side. Fraction 13 is attached. The radiation composition-containing ink layer comprises a polymer compound having at least one of a halogen group and an acetal group and a hydroxyl group, a colorable electron donor organic compound, and an electron donor organic compound depending on the exposure dose. A composition containing an active species-generating organic compound that causes coloration and a radiation absorber and / or a radiation fluorescent agent is printed. On the radiation composition-containing ink layer of the indicator 11, grid lines 14 that are divided into a grid of 7 rows and 8 rows and “A1... A7” that are unique identification codes 12 for each of the fractions 13. ”To“ G1... G7 ”are printed.

  The radiation-changing composition is a polyacetylene compound and a diarylethene compound instead of a composition comprising a polymer compound, an electron donor organic compound, an active species-generating organic compound, and a radiation absorber and / or a radiation fluorescent agent. And a composition containing at least one of fulgide compounds.

  The radiation exposure management indicator band 1 is used as follows.

  FIG. 1 is an example of use in the case of exposure to radiation at the center of a patient's back.

  As shown in FIG. 1, first, the indicator 11 is installed so that the radiation exposure amount detection indicator 11 faces outward and covers the surface of the patient body where radiation exposure is expected. The radiation exposure management indicator band 1 is wrapped around the patient while adjusting to fit the patient's body shape. The both ends of the radiation exposure management indicator band 1 are bonded and fixed together with surgical tape or adhesive bandage frequently used in the medical field. A picture of the installation status of the radiation exposure management indicator band 1 is taken. Lay the patient on his back on the radiotherapy table.

  Radiation is irradiated toward the patient from a radiation irradiation device (not shown) provided under the treatment table. Then, a change in gradation color tone is caused over the plurality of fractions 13 of the indicator 11 according to the radiation exposure amount.

  After the treatment, the surgical tape is peeled off, and the radiation exposure management indicator band 1 is pulled out from the armpit of the patient toward the lateral direction while lifting the patient slightly.

  The color tone of the indicator is visually observed, the color tone of each fraction 13 is compared with the standard color corresponding to the exposure dose, and the radiation exposure dose is detected. The fraction 13 of the indicator may be measured by a color difference meter, and the radiation exposure amount may be detected by comparing the color difference of each fraction with the color difference of another indicator previously exposed according to the radiation exposure amount. Compared with the photograph taken in the radiation exposure management indicator band before the treatment, the indicator installation position of the patient was specified, and the exposure amount indicated for each fraction 13 of the indicator 11 was written in the chart.

  When this patient is again subjected to radiation medical care, the radiation exposure management indicator band 1 is similarly wound and irradiated with radiation, and the color tone of each fraction 13 of the indicator 11 changes according to the cumulative exposure dose.

  The mechanism of coloration of the radiation exposure management indicator band 1 is presumed as follows. First, the radiation absorber in the indicator 11 absorbs and scatters the radiation applied to the indicator, causing the photoelectric effect, the Compton effect, and the generation of electron pairs that emit electrons. A radiation-excited fluorescent agent causes a fluorescent phosphorescence phenomenon together with a similar phenomenon. By these phenomena, active species having electron accepting properties are generated from the active species-generating organic compound, and charge transfer of the mixed color-forming electron donor organic compound is induced. Then, the electron donor compound is colored due to the change in electron density, and thereby the indicator 11 is discolored.

  Since the colored indicator 11 does not fade and the hue does not change, it can be stored for a long period of time as evidence showing the exposure dose. Although the details of the mechanism are unknown, it is considered that the hydroxyl group of the polymer compound generates an electron acceptor such as a hydrogen ion by irradiation and stabilizes the colored electron donor compound and the like, so that it does not fade. In particular, the hydroxyl group in the polymer compound makes it easier to generate an electron acceptor such as a hydrogen ion by the presence of a halogen group or an acetal group.

  This indicator 11 can display a wide range of radiation exposure of 0.05 to 25,000 Gy, and can be discolored at a lower dose than in the past. Although the details are unknown, the polymer compound stabilizes the colored electron donor organic compound and the like, and since it is contained in a relatively large amount in the composition, a clear color can be obtained even at a low exposure dose. It is thought to cause.

  The specific example of the raw material which comprises the radiation exposure management indicator belt | band | zone 1 is as follows.

  The fabric is a material that can absorb sweat generated from the patient during the operation, fits to the patient's body surface, and is made of a natural fiber or synthetic resin material that is difficult to expand and contract so as not to shift the positioning when performing the operation, for example Examples thereof include woven fabrics such as gauze and nonwoven fabrics.

  The fastener is made of resin or cloth that does not hinder radiation irradiation, and is preferably a hook-and-loop fastener, a slide fastener, a hook, a button, a string, an adhesive tape, and an adhesive bandage like Velcro (registered trademark of Kuraray Co., Ltd.). Of these, surgical tape and bandages are more preferred because they are easily available, can adhere to the patient's skin, and can easily fix the radiation exposure management indicator band.

  The radiation exposure amount detection material is preferably one that does not interfere with the image during the IVR treatment.

  For example, the indicator 11 may be one in which a radiation coloring composition is printed on a base material such as a plastic film or paper and the base material is pasted on a cloth. May be printed directly on the fabric. Fraction 13 is preferably fractionated in a grid shape with a side of 0.5 to 40 cm square, rectangular, rhombus or triangle, and is fractionated into horizontal stripes or vertical stripes at intervals of 0.5 to 40 cm. It may be. The identification code 12 assigned to the fraction 13 may be printed with letters, numbers, symbols, and patterns. The ink for printing the identification code 12 and the grid lines 14 is not particularly limited as long as it does not inhibit radiation irradiation.

  If the fraction 13 is fractionated in a grid pattern or a stripe pattern, the change in color tone of the indicator 11 is distributed over the plurality of fractions 13, making it easy to check the shade and position visually. And be accurate.

  Each fraction 13 of the indicator 11 may be fractionated by printing grid lines 14.

  As shown in FIG. 2, the adjacent grid-like fractions 13 may be arranged with a slight gap.

  As shown in FIG. 3, the adjacent striped fractions 13 may be arranged with a slight gap therebetween, and the striped fractions may be further subdivided by grid lines 14. .

  When each fraction 13 of the indicator 11 has a lattice shape or a stripe shape, the contrast of the color tone with the adjacent fraction becomes clearer.

  As shown in FIG. 4, a plurality of radiation-changing compositions having different sensitivities or a plurality of radiation-changing compositions that change color to different tones may be attached to adjacent striped fractions, Each of the striped fractions may be further subdivided by the grid lines 14. For each adjacent grid-like fraction 13, another radiation-changing composition having a different sensitivity or another radiation-changing composition that changes color to a different color tone may be attached.

  The radiation discoloring composition may be printed on a substrate such as a plastic film and covered with a protective film.

  The radiation coloring composition is replaced with a composition containing a polymer compound, a colorable electron donor organic compound, an active species-generating organic compound, and a radiation absorber and / or a radiation fluorescent agent. The composition may contain at least one of a compound, a diarylethene compound, and a fulgide compound.

The polymer compound is represented by the following formula (1):

(In the above formula, X is a halogen atom, -R ₁ is a hydrogen atom, a cyano group, an alkyl group, an aryl group, an alkoxy group, an alkoxycarbonyl group, an aliphatic carbonyloxy group such as an acetoxy group, a carboxyl group, an aryloxy group. , An aralkyl group, or an aralkoxy group, wherein l, m, and n are arbitrary ratios)), and the following formula (2)

(In the above formula, -R ₂ and -R ₃ are the same or different and are a hydrogen atom, a cyano group, an alkyl group, an aryl group, an alkoxy group, an alkoxycarbonyl group, an aliphatic carbonyloxy group such as an acetoxy group, or a carboxyl group. , An aryloxy group, an aralkyl group, or an aralkoxy group, and p, q, and r are in any ratio. These polymer compounds may be used alone or in combination as a mixture, or other polymer compounds may be mixed.

  The color-providing electron donor organic compound is usually colorless or light-colored and has a property of developing color by the action of an active species such as Bronsted acid or Lewis acid, that is, an electron acceptor. Specifically, triphenylmethanephthalides such as crystal violet lactone, malachite green lactone; fluorans such as 3-diethylaminobenzo-α-fluorane, 3-diethylamino-7-chlorofluorane, 3-diethylamino-7-dibenzyl Aminofluorane, 3,6-dimethoxyfluorane; phenothiazines such as 3,7-bisdimethylamino-10- (4′-aminobenzoyl) phenothiazine; indolylphthalides such as 3,3-bis (1-ethyl- 2-methylindol-3-yl) phthalide, 3,3-bis (1-n-butyl-2-methylindol-3-yl) phthalide; leucooramines such as N- (2,3-dichlorophenyl) leucoora Min, N-phenylauramine; Rhodaminelac Rhodamine-β-o-chloroaminolactam; Rhodamine lactones such as Rhodamine-β-lactone; Indolines such as 2- (phenyliminoethanedilidene) -3,3′-dimethylindoline, p-nitrobenzylleucomethylene blue Benzoylleucomethylene blue; triarylmethanes such as bis (4-diethylamino-2-methylphenyl) phenylmethane and tris (4-diethylamino-2-methylphenyl) methane. They may be used alone or as a mixture of two or more.

  The active species-generating organic compound is one in which an active species is irreversibly generated by irradiation of a radiation, and is a compound having a halogen group, such as halogenated alkyls such as carbon tetrabromide, tribromoethanol, tribromomethylphenylsulfone, And methyl derivatives.

  The radiation absorber is a metal of barium, yttrium, silver, tin, hafnium, tungsten, platinum, gold, lead, bismuth, zirconium, europium, cerium, and a compound containing the metal such as sulfate, carbonate of the metal. And nitrates. They may be used alone or as a mixture of two or more.

The radiation-excited fluorescent agent is CaWO ₄ , MgWO ₄ , a salt represented by HfP ₂ O ₇ , ZnS: Ag, ZnCdS: Ag, CsI: Na, CsI: Tl, BaSO ₄ : Eu ²⁺ , Gd ₂ O ₂ S : Tb ³⁺ , La ₂ O ₂ S: Tb ³⁺ , Y ₂ O ₂ S: Tb ³⁺ , Y ₂ SiO ₅ : Ce, LaOBr: Tm ³⁺ , BaFCl: Eu ²⁺ , BaFBr: Eu ²⁺ The baked product shown is mentioned. The fired product of ZnS: Ag is obtained by firing with zinc sulfide as a main component and adding silver as a heavy metal activator. Other fired products can be obtained in the same manner. They may be used alone or as a mixture of two or more.

  The radiation-colorable composition comprises 5 to 50 parts by weight of a polymer compound, 0.01 to 50 parts by weight of a colorable electron donor organic compound, 0.1 to 50 parts by weight of an active species-generating organic compound, It preferably contains 0.1 to 500 parts by weight of a radiation absorber or radiation-excited fluorescent agent.

  The radiation-colorable composition can adjust the hue after color change, the shade of color, and the color change rate by adjusting the type and mixing ratio of the substances.

  The radiation-colorable composition may be used as an ink or paint by dissolving the polymer compound in a solvent to form a medium. The medium preferably contains 50 to 95 parts by weight of the solvent with respect to 5 to 50 parts by weight of the polymer compound.

  Solvents include methanol, ethanol, isopropanol, butyl alcohol, hexyl alcohol, methyl acetate, ethyl acetate, propyl acetate, isobutyl acetate, butyl acetate, acetone, 2-butanone, cyclohexane, isophorone, methyl ethyl ketone, 4-methyl-2-pentanone , Ethyl ether, isopropyl ether, tetrahydrofuran, dioxane, methyl cellosolve, ethyl cellosolve, butyl cellosolve, 2-hexane, isooctane, solvent naphtha, methylene chloride, propylene chloride, ethylene chloride, chloroform, dichloroethane, 1,1,2-trichloroethane , Carbon tetrachloride, benzene, toluene, xylene, chlorobenzene, N, N-dimethylformamide, N-methyl-2-pyrrolidone Dimethyl sulfoxide, at least one compound selected from acetate is preferred. These solvents may be used alone or in combination. Any solvent that dissolves the polymer compound can be used.

  The radiation coloring composition may contain additives such as an antifoaming agent, a surfactant, and a coagulant.

  The indicator 11 may be covered with a transparent or translucent protective film 18.

  The protective film 18 protects the indicator 11 by blocking ultraviolet rays or blocking moisture such as a large amount of perspiration during operation. Examples thereof include polyester, polystyrene, polycarbonate, polyethylene terephthalate, polyimide, or polypropylene films, and those obtained by mixing or laminating ultraviolet absorbers in these films.

  A pigment that approximates the hue before the color change of the ink layer or after the color change according to the radiation exposure amount may be attached to the side of the indicator 11.

  The substrate 16 of the indicator 11 is preferably made of polyester, polystyrene, polycarbonate, polyethylene terephthalate, polyimide, polypropylene resin or paper.

  The radiation-colorable composition may contain a polyacetylene compound, a diarylethene compound or a fulgide compound, and may further contain a condensed polycyclic aromatic compound.

  Examples of the polyacetylene compound include diacetylene compounds, and more specifically, carbazoles having a diacetylene group.

  As diarylethene compounds, diarylethenes exemplified by diarylperfluorocyclopentene having an aryl group which may be substituted with a substituent such as an alkyl group, an alkoxy group, a halogen group, an aryl group or a heteroaryl group at positions 1 and 2; A diheteroaryl perfluorocyclopentene having a heteroaryl group which may be substituted with a substituent such as an alkyl group, an alkoxy group, a halogen group, an aryl group or a heteroaryl group at positions 1 and 2, more specifically, 1 , 2-bis [2-methoxy-5-phenyl-3-thienyl] perfluorocyclopentene and the like.

  Examples of the fulgide compound include bismethylene succinic anhydrides.

  Examples of the condensed polycyclic aromatic compound include naphthalene, anthracene, phenanthrene, fluorene, benzofuran, benzofuran, benzothiophene, and indole.

  Although the example which used the radiation exposure amount detection indicator was shown as a radiation exposure amount detection material, the radiation exposure amount detection element used for the dosimeter which detects a radiation or measures a radiation dose may be used. A radiation exposure detection indicator and a radiation exposure detection element may be used in combination. The shape of the radiation exposure amount detection material may be any of a sheet shape, a card shape, a chip shape, and a box shape.

  Specific examples of the radiation exposure detection element are as follows. For example, an RPL element such as glass used in a fluorescent glass dosimeter using a radio photoluminescence (RPL) phenomenon in which a glass exposed to radiation fluoresces when irradiated with ultraviolet rays; a solid thermoluminescence phenomenon TLD elements used in thermoluminescence dosimeters (TLDs) using light; light that uses the light-stimulated luminescence phenomenon that fluoresces when light is applied to a substance that has accumulated energy by interaction with radiation OSL element used in Stimulated Luminescence Dosimeter (OSL); Radiation sensitive film batch utilizing phenomenon that photographic film with filter is blackened by radiation; Damage when radiation passes through insulating solid Insulating Solid Element Used in Solid State Track Detectors Utilizing Phenomenon An electrode element used in an ionization chamber dosimeter utilizing a phenomenon that discharges due to an ionization effect of radiation incident in an ionization chamber charged in advance; a semiconductor element used in a semiconductor detector utilizing the ionization effect of a semiconductor A photostimulated luminescence detection element (IP element) such as an imaging plate.

  Examples 1 to 3 show prototypes of radiation exposure management indicator bands to which the present invention is applied.

Example 1
The polymer compound vinyl chloride / vinyl acetate / polyvinyl alcohol copolymer was dissolved in toluene / ethanol (1: 1) as a solvent to prepare a 25% solution medium. 100 parts by weight of the prepared medium, 10 parts by weight of 2- (2-chloroanilino) -6-dibutylaminofluorane, which is a fluorane, is used as a color-forming electron donor organic compound, and 10 parts by weight of tribromoethanol is used as a radiation activator. Then, 20 parts by weight of cerium oxide as a radiation absorber was mixed to prepare an ink, and a composition for radiation dose history indicator was obtained. When the ink is exposed to radiation, the ink becomes darker as the amount of radiation exposure increases. The composition obtained was applied to the front surface of a polyethylene film substrate with a pressure-sensitive adhesive on the back surface, and then dried to prepare an exposure dose detection indicator.

  As shown in FIG. 1, this indicator 11 was affixed to the fabric 10 so as to match the body part to be detected, and the radiation exposure management indicator band 1 was obtained.

  Wrap the radiation exposure control indicator band 1 around the patient, adjust the indicator 11 to fit the body part to be detected, and fix it with surgical tape so that it does not loosen or come off. . Before the operation, the patient was photographed for radiation exposure management indicator band 1.

  IVR treatment by X-ray was performed. Thereafter, the surgical tape was peeled off, the patient was lifted several centimeters, and the radiation exposure management indicator band 1 was pulled out from this gap and removed in a few seconds.

  The fraction irradiated with the radiation by performing the IVR treatment had a color tone changed to black according to the radiation exposure dose. Furthermore, the change of the color tone of the radiation exposure management indicator band 1 was photographed, and compared with the photograph before the operation, the exposure position of the patient was specified. For each fraction 13, a value obtained by estimating the exposure amount from the degree of discoloration of the color tone and the identification code 12 were described in the chart.

(Example 2)
The polymer compound, vinyl chloride / vinyl acetate / polyvinyl alcohol copolymer, was dissolved in toluene / ethanol (1: 1) as a solvent to prepare a 25% medium. For 100 parts by weight of the adjusted medium, 100 parts by weight of 3-dimethylamino-5-methyl-7-diphenylamino-fluorane, which is a fluorane, is used as a color-forming electron donor compound, and 10 parts by weight of tribromoethanol is used as a radiation activator. Part and 20 parts by weight of cerium oxide as a radiation absorber were mixed to prepare a first ink. In order to change the sensitivity, a second ink was prepared in the same manner as the first ink except that 5 parts by weight of the radiation activator was used. When these inks are exposed to radiation, the color changes from light green to dark green according to the amount of radiation exposure.

  As shown in FIG. 4, the first and second inks are alternately applied in stripes on the polyethylene film substrate 16, dried, covered with a flexible polyethylene terephthalate film, and then applied to the fabric 10. Affixed to obtain a radiation exposure control indicator band 1.

  When the radiation exposure management indicator band 1 was irradiated with radiation, it was confirmed by visual observation that each of the fractions 13 of both inks had changed color tone, but a difference in the degree of change in color tone could not be confirmed. . When using a color difference meter, the difference in the degree of change in color tone according to the radiation exposure could be detected as a digital quantity.

(Example 3)
Instead of the second ink of Example 2, the same procedure as in Example 2 was used, except that 3-dimethylaminobenzo {a} fluorane was used as the color-forming electron donor compound to change the color tone after the color change. Thus, a radiation exposure control indicator band 1 was obtained.

  When the radiation exposure management indicator band 1 was irradiated with radiation, the degree of change in the color tone of each fraction 13 of both inks according to the radiation exposure amount could be confirmed by visual observation. When a color difference meter was used, a difference in the degree of change in color tone according to the radiation exposure amount was confirmed. When using a color difference meter, the difference in the degree of change in color tone according to the radiation exposure could be detected as a digital quantity.

  In place of the radiation exposure detection indicator, radiation exposure detection elements such as RPL elements, TLD elements, OSL elements, film batches, insulating solid elements, electrode elements, semiconductor elements, and IP elements may be used. The exposure amount could be detected as a digital amount or a change in color tone.

  In addition to X-rays, similar results were obtained by radiation therapy in which radiation such as gamma rays, neutron rays, proton rays, heavy particle rays, and electron rays was irradiated.

  The radiation exposure management indicator band is used to manage the radiation exposure amount of the patient at the time of radiation medical care and the worker at the time of radiation measurement.

It is a rear view of the radiation exposure management indicator belt to which the present invention is applied.

It is a partial rear view of another radiation exposure management indicator band to which the present invention is applied.

It is a partial rear view of another radiation exposure management indicator band to which the present invention is applied.

It is a partial rear view of another radiation exposure management indicator band to which the present invention is applied.

Explanation of symbols

  1 is a radiation exposure management indicator band, 10 is a fabric, 11 is a radiation exposure amount detection indicator, 12 is an identification code, 13 is a fraction, and 14 is a grid line.

Claims (6)

To fabric wrapped around a body part to be detected and radiation exposure, radiation discoloration composition containing layer, being fractionated in a grid or stripes are denoted in accordance with the said site was the fraction next A radiation exposure control indicator band, wherein the radiation-changing composition-containing layer for each fraction is formed of the radiation-changing composition that is discolored with different sensitivities and has a different color tone .   The radiation exposure management indicator band according to claim 1, wherein the lattice shape is a grid pattern or the stripes are equally spaced.   The radiation exposure management indicator band according to claim 1, wherein an identification code is attached to each of the fractionated fractions. The discoloration is to detect the radiation exposure amount by visually comparing the color tone of each fractionated fraction and a standard color corresponding to the exposure amount, or the color difference of each fractionated fraction. 2. The radiation exposure management indicator according to claim 1, wherein the radiation exposure amount is detected by comparing a color difference of another radiation-discoloring composition-containing layer previously exposed in accordance with the exposure amount. band The radiation-discoloring composition-containing layer is printed with the radiation- discoloring composition on a substrate affixed to the fabric , or directly printed on the fabric with the radiation-discoloring composition. The radiation exposure management indicator band according to claim 1.   The radiation exposure management indicator band according to claim 1, wherein the cloth is a single long cloth.

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