System for local exposure dose evaluation and measurement method of radiation dose using thin-film scintillator

Abstract

A local exposure dose assessment system using a thin-film scintillator according to one embodiment of the present invention may include: a phantom of an exposed area 3D printed by a 3D printer that 3D prints using data obtained by scanning the exposed area of ​​an exposed person by a 3D scanner; a thin-film scintillator mimicking the skin basal layer coupled to a part of the exposed area phantom; a skin epidermal layer composed of a tissue-equivalent material coupled to the upper part of the thin-film scintillator mimicking the skin basal layer; and a signal processing system that measures a radiation dose by connecting the thin-film scintillator mimicking the skin basal layer coupled to the skin epidermal layer by a light guide.

Description

Technology Field

[0001] The present invention relates to a local exposure dose assessment system and a post-dose assessment method using a thin-film scintillator that verifies the radiation dose (local exposure dose) by utilizing 3D printing technology to produce a thin-film scintillator that mimics the basal layer of the skin and a phantom of the exposed area of ​​the exposed person. More specifically, the invention relates to a local exposure dose assessment system and a post-dose assessment method using a thin-film scintillator that evaluates the radiation dose post-examined by measuring the actual absorbed dose by combining a thin-film scintillator and a skin epidermal layer made of tissue-equivalent material using 3D printing technology and a phantom that mimics the actual exposure situation of the exposed person. Background Technology

[0003] In the event of a radiation exposure accident at a workplace using a radiation source or radiation generating device, deterministic effects—harmful tissue reactions resulting from the interaction between radiation and body tissues—may manifest. Relevant laws and regulations stipulate that if a radiation worker suffers radiation damage due to a radiation exposure accident, necessary health measures must be taken for the exposed individual; therefore, an assessment of the accumulated dose in localized areas where deterministic effects may occur is required to establish a plan for prompt health measures.

[0004] Currently, post-dose assessment technologies utilized domestically and internationally include computational simulation, biological, physical, and clinical dose assessment methods. Methodologies for measuring the exposure dose of over-exposed individuals can be classified into biological dose assessment, such as chromosomal mutation testing, and physical dose assessment using statutory dosimeters, such as thermoluminescent dosimeters (TLDs) and optically stimulated luminescence dosimeters (OSLDs).

[0005] In practice, when regulatory agencies perform post-dose assessment, they estimate the exposure dose range by synthesizing the results derived from using various dose assessment methodologies in combination. In the case of physical dose assessment, radiation doses are accumulated according to the location and time of exposure using a statutory dosimeter (mainly a TLD), and the dosimeter is transported to a reading facility to record the accumulated thermoluminescence using a TLD reader. Consequently, the deep dose equivalent (Hp(10)) and surface dose equivalent (Hp(0.07)) are derived by applying a dose equivalent conversion factor to the thermoluminescence.

[0006] As such, the measurement methodologies used for post-exposure dose assessment are indirect methods, and various factors causing error exist compared to direct measurements using radiation detection systems. Therefore, a system is required to directly measure and evaluate the local post-exposure dose of exposed individuals in the event of a radiation exposure accident.

[0007] There are limitations in that the exposure dose assessment ranges differ among the post-dose assessment technologies presented above, there are variables that may increase the uncertainty of the dose assessment or minimum detection doses, and the exposure dose to local areas of the human body cannot be accurately assessed, so limited treatment methods such as symptomatic treatment are used in the event of overexposure to local areas.

[0008] In physical evaluation methods, TLDs and OSLDs, which are used as statutory dosimeters for indirect measurement in post-dose assessment, may experience deformation of the film surface depending on ambient conditions such as temperature, humidity, and visible light. Furthermore, errors can increase due to the occurrence of thermofluorescence caused by mechanical vibration and friction, in addition to the influence of radiation. Additionally, there are disadvantages such as the existence of a fading phenomenon, where the luminescence of the phosphor decreases with exposure to visible light or elapsed time, and the fact that film readings may vary depending on the angle of radiation incidence.

[0009] Furthermore, inaccurate results may be obtained when evaluating tissue equivalent doses due to differences in the density and effective atomic number of the statutory dosimeter material, and it is difficult to derive an accurate dose when converting between deep dose equivalents and surface dose equivalents because different conversion factors are used for the same irradiation dose.

[0010] Related prior art documents include Korean Registered Patent No. 10-2260156 (Title of invention: Method for accurate dose evaluation on skin, Registration date: May 28, 2021) and Korean Registered Patent No. 10-1203676 (Title of invention: Radiation dose measuring device using a scintillator, Registration date: November 15, 2012). Prior art literature

[0012] Korean Registered Patent No. 10-2260156 (Published June 7, 2021) Korean Registered Patent No. 10-1203676 (Published November 21, 2012) The problem to be solved

[0013] An embodiment of the present invention can be used as a novel and additional method for post-exposure dose assessment of a radiation victim by directly measuring the radiation dose through a thin-film scintillator that mimics the thickness and shape of the skin basal layer, made of a material with tissue constituent elements, density, and effective atomic number.

[0014] The cumulative radiation dose regarding the skin's basal layer, thickness, and shape can be measured using a thin-film scintillator fabricated with a 3D printer, rather than the indirect post-dose measurement method using conventional legal dosimeters TLD / OSLD. means of solving the problem

[0016] According to one embodiment of the present invention, a local exposure dose assessment system using a thin-film scintillator is provided, comprising: a phantom of an exposed area 3D printed by a 3D printer that 3D prints using data obtained by scanning the exposed area of ​​an exposed person by a 3D scanner; a thin-film scintillator mimicking the skin basal layer coupled to a part of the exposed area phantom; a skin epidermal layer composed of a tissue-equivalent material coupled to the upper part of the thin-film scintillator mimicking the skin basal layer; and a signal processing system that measures a radiation dose irradiated from a radiation source by connecting the thin-film scintillator mimicking the skin basal layer coupled to the skin epidermal layer by a light guide.

[0017] The above signal processing system includes: a photomultiplier that amplifies a signal generated from the skin basal layer mimicking thin film scintillator; and an ammeter that displays the radiation dose as an electric current through the photomultiplier.

[0018] It further includes a radiation source that irradiates the above-mentioned skin basal layer mimic thin film scintillator with radiation.

[0019] It further includes a housing in which the above radiation source and the above signal processing system are provided.

[0020] The above housing further includes a test table on which the phantom of the exposed area is located; and a radiation detector for detecting radiation irradiated onto the test table.

[0021] The phantom of the exposure site, to which the skin basal layer-mimicking thin film scintillator is combined, is positioned on the test table, and radiation is irradiated from the radiation source to measure the radiation dose.

[0022] The above skin basal layer mimicking thin film scintillator comprises, in weight ratio to the total weight, a photopolymerizable bisphenol A-based monomer with a weight ratio of 98.5 wt% or less, a diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide (TPO) with a weight ratio of 0.03 wt% to 0.11 wt%, a 2.5-diphenyloxazole (PPO) with a weight ratio of 0.5 wt% to 1.5 wt%, and 2,7-bis(2-(9-ethylcarbazol-4-yl)vinyl-9,9-dihexyl-SHfluorine and It contains 0.005 wt% to 0.015 wt% by weight of 9,10-Bis[(9-ethyl-3-carbazoyl)-vinylenyl]-anthracene.

[0023] The planar area of ​​the skin basal layer mimicking thin film scintillator is smaller than the planar area of ​​the skin epidermal layer, and the thickness of the skin basal layer mimicking thin film scintillator is smaller than the thickness of the skin epidermal layer.

[0024] According to another aspect of the present invention, a post-dose assessment method is provided, comprising: scanning the exposed area of ​​a person exposed to radiation; fabricating an exposed area phantom composed of tissue-equivalent material by a 3D printer using data obtained from the scan; fabricating a skin epidermal layer composed of a skin basal layer-mimicking thin film scintillator and tissue-equivalent material; combining the exposed area phantom, the skin basal layer-mimicking thin film scintillator, and the skin epidermal layer; combining with a signal processing system to process a light signal generated from the skin basal layer-mimicking thin film scintillator; and directly measuring the radiation dose in the signal processing system.

[0025] The step of directly measuring the radiation dose in the above signal processing system involves amplifying the signal generated from the skin basal layer mimicking thin film scintillator in a photomultiplier and displaying it as current by an ammeter. Effects of the invention

[0027] The local exposure dose assessment system and post-dose assessment method using a thin-film scintillator according to an embodiment of the present invention can propose a new technology for applying radiation safety regulations through the direct measurement of radiation dose, in addition to conventional computational simulation / biological / physical / clinical post-dose assessment methodologies.

[0028] In addition, the post-dose evaluation method and the direct measurement method of radiation dose using a thin-film scintillator according to an embodiment of the present invention are direct measurement methods using a scintillator having a density, effective atomic number, thickness, and shape similar to that of the exposure site; therefore, compared to other methodologies, they reduce the error in dose evaluation and enable rapid and precise evaluation. Brief explanation of the drawing

[0030] FIG. 1 is a diagram showing an image of a three-dimensional scan file extracted by scanning the exposed area of ​​an exposed person with a 3D scanner in a local exposure dose assessment system using a thin-film scintillator according to an embodiment of the present invention. FIG. 2 is a drawing showing a phantom of an exposed area of ​​an exposed person produced by a 3D printer in a local exposure dose assessment system using a thin-film scintillator according to an embodiment of the present invention. FIG. 3 (a) is a diagram showing a skin epidermal layer composed of a skin basal layer mimicking a thin film plastic scintillator and a tissue-equivalent material combined therewith, which are fabricated through a 3D printer in a local exposure dose assessment system using a thin film scintillator according to an embodiment of the present invention, and FIG. 3 (b) is a diagram showing the actual fabricated result. FIGS. 4 (a) and FIGS. 4 (b) are drawings illustrating the results of measurements taken using a thin film scintillator mimicking the skin basal layer and a precision thin film thickness measuring instrument for measuring the thickness of the skin epidermal layer in a local exposure dose evaluation system using a thin film scintillator according to an embodiment of the present invention. FIG. 5 is a diagram illustrating an experimental apparatus using a local exposure dose evaluation system using a thin-film scintillator according to an embodiment of the present invention. FIG. 6 is a flowchart of a post-dose evaluation method using a thin film scintillator according to an embodiment of the present invention. Specific details for implementing the invention

[0031] Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or restricted by the embodiments. Identical reference numerals in each drawing indicate identical components.

[0032] FIG. 1 is a diagram showing an image of a three-dimensional scan file extracted by scanning the exposed area of ​​an exposed person with a 3D scanner in a local exposure dose assessment system using a thin-film scintillator according to an embodiment of the present invention.

[0033] Referring to FIG. 1, a 3D scanner (11) performs a three-dimensional scan of the hand, which is the exposed area of ​​the exposed person. FIG. 1 shows a three-dimensional scan model (12) of the locally exposed hand area.

[0034] FIG. 2 is a drawing showing a phantom of an exposed area of ​​an exposed person produced by a 3D printer in a local exposure dose assessment system using a thin-film scintillator according to an embodiment of the present invention.

[0035] Referring to FIG. 2, the 3D printer (13) receives data from the 3D scanner (11) and 3D prints the exposed area phantom (110) using the data scanned by the 3D scanner (11).

[0036] FIG. 3 (a) is a diagram showing a skin epidermal layer composed of a skin basal layer mimicking a thin film plastic scintillator and a tissue-equivalent material combined therewith, which are fabricated through a 3D printer in a local exposure dose assessment system using a thin film scintillator according to an embodiment of the present invention, and FIG. 3 (b) is a diagram showing the actual fabricated result.

[0037] Referring to FIG. 3 (a), a local exposure dose assessment system using a thin film scintillator according to one embodiment of the present invention is illustrated with a skin basal layer mimicking thin film scintillator (120) coupled to a part of the exposure site phantom and a skin epidermal layer (130) composed of a tissue-equivalent material coupled to the upper part of the skin basal layer mimicking thin film scintillator (120).

[0038] The planar area of ​​the skin base layer mimicking thin film scintillator (120) is smaller than the planar area of ​​the skin epidermal layer (130), and the thickness of the skin base layer mimicking thin film scintillator (120) is formed to be smaller than the thickness of the skin epidermal layer (130).

[0039] FIGS. 4 (a) and FIGS. 4 (b) are drawings illustrating the results of measurements taken using a precision thin film thickness measuring instrument to measure the thickness of a skin basal layer mimicking thin film scintillator (120) and a skin epidermal layer (130) in a local exposure dose evaluation system using a thin film scintillator according to an embodiment of the present invention.

[0040] Referring to FIG. 4 (a) and FIG. 4 (b) together, the X-axis represents the scan length and the Y-axis represents the thickness, and the results measured using a precision thin film thickness gauge are shown, where FIG. 4 (a) shows the thickness of a thin film scintillator (120) mimicking the skin basal layer and FIG. 4 (b) shows the thickness of the skin epidermal layer (130).

[0041] It can be seen that the thickness of the skin basal layer mimicking thin film scintillator (120) is smaller than the thickness of the skin epidermal layer (130).

[0042] FIG. 5 is a diagram illustrating an experimental apparatus using a local exposure dose evaluation system using a thin-film scintillator according to an embodiment of the present invention.

[0043] Referring to FIG. 5 together with FIG. 1 to FIG. 4, a local exposure dose evaluation system using a thin film scintillator according to one embodiment of the present invention comprises an exposure site phantom (110), a thin film scintillator (120) mimicking the skin basal layer, a skin epidermal layer (130), and a signal processing system (140).

[0044] The exposed area phantom (110) is 3D printed by a 3D printer (13) that 3D prints using data obtained by scanning the exposed area of ​​the exposed person by a 3D scanner (11).

[0045] In the exposed area phantom (110), an indentation is formed to which a skin basal layer mimicking thin film scintillator (120) is attached.

[0046] In the exposed area phantom (110), a skin epidermal layer (130) is combined on top of a skin basal layer mimicking thin film scintillator (120), and the exposed area phantom (110) is placed on a test table (152) of a housing (150) equipped with a local exposure dose evaluation system.

[0047] The skin basal layer mimicking thin film scintillator (120) preferably has a thickness of 40 μm to 60 μm and is bonded to an upper portion of the exposed area phantom (110). The skin basal layer mimicking thin film scintillator (120) is more preferably 50 μm thick, but different thicknesses may be applied depending on the exposed area.

[0048] The skin basal layer mimic thin film scintillator (120) has, in weight ratio to the total weight, a weight ratio of photopolymerizable bisphenol A-based monomers of 98.5 wt% or less, a weight ratio of diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide (TPO) of 0.03 wt% to 0.11 wt%, a weight ratio of 2.5-diphenyloxazole (PPO) of 0.5 wt% to 1.5 wt%, and 2,7-bis(2-(9-ethylcarbazol-4-yl)vinyl-9,9-dihexyl-SHfluorine) and It is composed of 0.005 wt% to 0.015 wt% by weight of 9,10-Bis[(9-ethyl-3-carbazoyl)-vinylenyl]-anthracene.

[0049] The skin epidermal layer (130) is bonded to the skin basal layer mimicking thin film scintillator (120) and is composed of a tissue-equivalent material.

[0050] The skin epidermal layer (130) preferably has a thickness of 60 μm to 80 μm. The skin epidermal layer (130) preferably has a thickness of 70 μm.

[0051] The skin basal layer mimicking thin film scintillator (120) and the skin epidermal layer (130) can be combined during or after production.

[0052] The signal processing system (140) measures the radiation dose by connecting a thin film scintillator (120) that mimics the skin basal layer, to which the skin epidermal layer (130) is combined, via a light guide (141). When radiation is irradiated, the scintillator emits light according to the radiation dose, and the radiation dose can be determined by inversely calculating the emitted light.

[0053] The optical guide (141) can be connected to the optical fiber (142) to transmit light or a signal, and the optical fiber (142) can be connected to the signal processing system (140).

[0054] The signal processing system (140) is configured to include a photomultiplier (143) and an ammeter (145).

[0055] The photomultiplier device (143) amplifies the signal generated from the skin basal layer mimic thin film scintillator (120). The photomultiplier device (143) may be a PMT (Photo Multiplier Tube) and may be a type of detector that measures light.

[0056] The photomultiplier device (143) converts and amplifies a light signal into an electrical signal based on the principle that when a light signal emitted from a skin basal layer mimicking thin film scintillator (120) is incident, a photon electron is emitted from an internal photocathode, and can be replaced with a multi-anode photomultiplier tube (multi-anode PMT), a silicon photomultiplier (SiPM), etc., depending on the situation and conditions.

[0057] The ammeter (145) displays the radiation dose as an electric current based on the signal amplified through the photomultiplier (143).

[0058] The radiation source (154) irradiates radiation to the exposed area phantom (110). The radiation source (154) includes an identified or unidentified radiation source.

[0059] According to the present invention, Cherenkov measurement and correction are performed through a simulated measuring part made of a tissue-equivalent material having the same shape as a skin basal layer mimicking thin film scintillator (120) and a skin epidermal layer (130).

[0060] The signal processing system (140) according to the present invention may further include a Cherenkov correction measurement unit (144). The Cherenkov correction measurement unit (144) can be connected to an on / off circuit to perform Cherenkov measurement and correction by turning it on and off.

[0061] The Cherenkov correction measurement unit (144) measures the radiation dose by removing noise signals generated in the optical guide (141) and the optical fiber (142). The noise signal refers to Cherenkov light generated by radiation.

[0062] The Cherenkov correction measurement unit (144) utilizes the Cherenkov phenomenon, in which a charged particle emits blue-white light when its velocity is faster than the phase velocity of light in a transparent material (dielectric) as it passes through the transparent material, and utilizes the principle that dielectric polarization occurs along the trajectory of the particle due to the action of an electric field, and that this energy is radiated as electromagnetic waves when the dielectric polarization returns to its original state.

[0063] A local exposure dose evaluation system using a thin film scintillator according to one embodiment of the present invention may further include a housing (150).

[0064] As an example, it is preferable that only the exposed area phantom (110) be located inside the housing (150), and that it be connected via an optical fiber (142) to a signal processing system (140) located outside the housing, a control unit (160) that controls the overall operation of the signal processing system (140), and a power supply unit (170) that supplies operating power. Additionally, inside the housing (150), a radiation source (154) that irradiates radiation from the bottom upward and a radiation detector (156) that detects radiation irradiated from the radiation source (154) are provided on a test table (152) where the exposed area phantom (110) is located.

[0065] The test table (152) is positioned between the radiation source (154) and the radiation detector (156) and is coupled to the central part of the housing (150).

[0066] A radiation source (154) is provided at the bottom of the housing (150), and a radiation detector (156) is provided at the top of the housing (150) opposite the radiation source (154).

[0067] It is preferable that the door (158) of the housing (150) be closed after the exposed area phantom (110) is placed on the test table (152).

[0068] In addition, a local exposure dose evaluation system using a thin film scintillator according to one embodiment of the present invention may further include a control unit (160) that controls the overall operation.

[0069] The control unit (160) is configured to include a microcontroller that performs computational processing and a memory that stores data.

[0070] In addition, a local exposure dose evaluation system using a thin film scintillator according to one embodiment of the present invention may further include a power supply unit (170) that supplies power.

[0071] It is preferable that the signal processing system (140), control unit (160), and power supply unit (170) be provided outside the housing (150).

[0072] In addition, a local exposure dose assessment system using a thin-film scintillator according to one embodiment of the present invention may further include a storage device for storing data.

[0073] FIG. 6 is a flowchart of a post-dose evaluation method using a thin film scintillator according to an embodiment of the present invention.

[0074] Referring to FIG. 6 together with FIG. 1 to 5, first, the exposed area of ​​the exposed person is 3D scanned with a 3D scanner (11) (S111).

[0075] Then, a three-dimensional scan model (12) is created using data obtained from scanning with a 3D scanner (11), and a phantom (110) of an exposed area composed of tissue-equivalent material is produced by a 3D printer (13) using the three-dimensional scan model (12) (S112).

[0076] Then, a thin film scintillator (120) mimicking the skin's basal layer is fabricated (S121).

[0077] Along with this, a skin epidermal layer (130) composed of tissue-equivalent material is produced (S131).

[0078] In the drawing, for ease of understanding, the skin basal layer mimicking thin film scintillator (120) and the skin epidermal layer (130) are shown as being manufactured separately, but the skin basal layer mimicking thin film scintillator (120) and the skin epidermal layer (130) may be manufactured as a single unit or separately during the manufacturing process.

[0079] Next, the exposed site phantom (110), the skin basal layer mimicking thin film scintillator (120), and the skin epidermal layer (130) are combined (S122).

[0080] The exposure site phantom (110), which is a combination of a skin basal layer mimicking thin film scintillator (120) and a skin epidermal layer (130), is combined with a signal processing system (140) to process the light signal generated from the skin basal layer mimicking thin film scintillator (120) (S123).

[0081] The exposed area phantom (110) is placed on a test table (152) and radiation is irradiated from a radiation source (154).

[0082] Then, the radiation dose is directly measured in the signal processing system (140) (S124).

[0083] The step of directly measuring the radiation dose in the signal processing system (140) involves amplifying the signal generated from the skin basal layer mimic thin film scintillator (120) in the photomultiplier device (143), removing the radiation generated from the light guide (141) and optical fiber (142), and displaying the radiation dose as an electric current by the ammeter (145).

[0084] Accordingly, the local exposure dose assessment system and post-dose assessment method using a thin-film scintillator according to the embodiment of the present invention can propose a new technology for applying radiation safety regulations through the direct measurement of radiation dose, in addition to conventional computational simulation / biological / physical / clinical post-dose assessment methodologies.

[0085] In addition, the post-dose evaluation method and the direct measurement method of radiation dose using a thin-film scintillator according to an embodiment of the present invention are direct measurement methods using a scintillator having a density, effective atomic number, thickness, and shape similar to that of the exposure site; therefore, compared to other methodologies, they reduce the error in dose evaluation and enable rapid and precise evaluation.

[0087] As described above, the embodiments of the present invention have been explained with specific details such as specific components, limited embodiments, and drawings; however, this is provided merely to aid in a more comprehensive understanding of the present invention, and the present invention is not limited to the above embodiments. A person skilled in the art to which the present invention pertains can make various modifications and variations from this description. Accordingly, the scope of the present invention should not be limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims themselves, shall be considered to fall within the scope of the concept of the present invention. Explanation of the symbols

[0089] 11: 3D Scanner 12: 3D Scan Modeling 13: 3D Printer 110: Exposure site phantom 120: Skin basal layer mimicking thin film scintillator 130: Epidermal layer of the skin 141: Light Guide 142: Optical Fiber 140: Signal Processing System 143: Photomultiplier 144: Cherenkov correction measurement unit 145: Ammeter 150: Housing 152: Test Table 154: Radiation source 156: Detector 158: Door 160: Control unit 170: Power supply

Claims

Claim 1 A 3D-printed exposure site phantom by a 3D printer that 3D-prints using data obtained by scanning the exposure site of an exposed person by a 3D scanner; a skin basal layer mimicking thin film scintillator coupled to an indentation formed in a part of the exposure site phantom; a skin epidermal layer composed of a tissue-equivalent material coupled to the upper part of the skin basal layer mimicking thin film scintillator; and a signal processing system that measures the radiation dose irradiated from a radiation source, wherein the skin basal layer mimicking thin film scintillator coupled to the skin epidermal layer is connected by a light guide; and wherein the signal processing system comprises: a photomultiplier that amplifies a signal generated from the skin basal layer mimicking thin film scintillator; and an ammeter that displays the radiation dose as an current through the photomultiplier. It includes a radiation source that irradiates radiation onto the skin basal layer mimicking thin film scintillator, and further includes a housing in which the radiation source and the signal processing system are provided inside, wherein the housing comprises: a test table on which the phantom of the exposed site is located; and a radiation detector that detects radiation irradiated onto the test table. It further comprises, wherein the radiation source irradiates radiation from the bottom upward onto a test table in which an exposed site phantom is positioned inside the housing, and wherein, in weight ratio to the total weight of the skin basal layer mimicking thin film scintillator, the weight ratio of a photopolymerizable bisphenol A-based monomer is 98.5 wt% or less, the weight ratio of diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide (TPO) is 0.03 wt% to 0.11 wt%, and the weight ratio of 2.5-diphenyloxazole (PPO) is 0.5 wt% to 1.A thin film type comprising 5 wt%, and 0.005 wt% to 0.015 wt% by weight of 2,7-Bis(2-(9-ethylcarbazol-4-yl)vinyl-9,9-dihexyl-SHfluorine) and 9,10-Bis[(9-ethyl-3-carbazoyl)-vinylenyl]-anthracene, wherein the planar area of ​​the skin basal layer mimicking thin film scintillator is smaller than the planar area of ​​the skin epidermal layer, the skin basal layer mimicking thin film scintillator has a thickness of 40 μm to 60 μm, and the skin epidermal layer has a thickness of 60 μm to 80 μm. Local exposure dose assessment system using a scintillator. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 A method for evaluating post-mortem dose using a thin-film scintillator, comprising: a step of scanning the exposed area of ​​an exposed person; a step of fabricating an exposed area phantom composed of a tissue-equivalent material by a 3D printer using data obtained from the scan; a step of fabricating a skin epidermal layer composed of a skin basal layer-mimicking thin-film scintillator and a tissue-equivalent material; a step of combining the exposed area phantom, the skin basal layer-mimicking thin-film scintillator, and the skin epidermal layer; a step of combining with a signal processing system to process a light signal generated from the skin basal layer-mimicking thin-film scintillator; and a step of directly measuring the radiation dose in the signal processing system; characterized by comprising: a method for evaluating post-mortem dose using a thin-film scintillator. Claim 9 In claim 8, the step of directly measuring the radiation dose in the signal processing system is characterized by amplifying the signal generated from the skin basal layer mimicking thin film scintillator in a photomultiplier and displaying it as current by an ammeter, in a method for evaluating post-mortem dose using a thin film scintillator.

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