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Dosimeter container and dose measuring body

一种剂量计、容器的技术，应用在剂量计容器以及剂量测定体领域，能够解决比率存在极限、影响剂量计测定结果等问题，达到测定精度提高的效果

Inactive Publication Date: 2018-12-11
NIPPON LIGHT METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the molding composition described in Patent Document 2, there is a limit to the ratio of a radiation shielding material such as a lithium compound that can be mixed with the resin, and in order to obtain a sufficient shielding effect, it is necessary to design the shielding material to be relatively thick.
In addition, when irradiated with neutron rays, the resin component is slightly activated by radiation to release gamma rays, which may affect the measurement results of the dosimeter

Method used

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  • Dosimeter container and dose measuring body
  • Dosimeter container and dose measuring body
  • Dosimeter container and dose measuring body

Examples

Experimental program
Comparison scheme
Effect test

no. 2 Embodiment approach

[0112] FIG. 2 is a schematic diagram showing an example of a dosimeter case 20 according to a second embodiment of the present invention. In more detail, Figure 2A is a perspective view of the dosimeter container 10 . Figure 2B is the front view of the dosimeter container 20, Figure 2C Yes Figure 2B A-A cutaway view. Figure 2D is a perspective view of the main body portion 22A of the dosimeter container 20, Figure 2E It is a perspective view of the lid part 22B of the dosimeter case 20. FIG. Figure 2F It is a schematic diagram showing an example of the dosimeter 2 according to the second embodiment of the present invention, and a radiation dosimeter 51 is accommodated in the housing portion 21 of the dosimeter case 20 .

[0113] The dosimeter case 2 includes an accommodating portion 21 and a shielding portion 22 . The storage unit 21 is a member for housing a dosimeter for measuring doses of predetermined radiation other than neutron rays, and has the same functio...

no. 3 Embodiment approach

[0118] FIG. 3 is a schematic diagram showing an example of a dosimeter case 30 according to a third embodiment of the present invention. In more detail, Figure 3A is a perspective view of the dosimeter container 30, Figure 3B is a front view of the dosimeter container 30 . Figure 3C is a top view of the dosimeter container 30, Figure 3D Yes Figure 3C A-A cutaway view. Figure 3E is a perspective view of the main body portion 32A of the dosimeter container 30, Figure 3F It is a perspective view of the cover part 32B of the dosimeter case 30. Figure 3G It is a schematic diagram showing an example of the dosimeter 3 according to the third embodiment of the present invention, and a radiation dosimeter 51 is accommodated in the accommodation portion 31 of the dosimeter case 30 .

[0119] The dosimeter case 3 includes an accommodating portion 31 and a shielding portion 32 . The storage unit 31 is a member for housing a dosimeter for measuring doses of predetermined rad...

Embodiment

[0130] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these Examples.

[0131]

[0132] Through the following steps, the cross-sectional shape (corresponding to Figure 1C )for Figure 5 Dosimeter container 10 of the dimensions shown.

[0133] 〔 6 Manufacture of LiF sintered body]

[0134] Through the following process, a cylindrical shape with a height of about 16mm was obtained 6 LiF sintered body.

[0135] First, set the 6 LiF powder ( 6 Li purity 95.0 at %, LiF 99%: 100 parts by mass of Sigma-Aldrich (manufactured by Sigma-Aldrich) was mixed with 16 parts by mass of a molding aid composed of stearic acid and cellulose to obtain 6 LiF composition.

[0136] (1) Pressurization process

[0137] Then, fill a mold with a diameter of 25mm into about 15.8g of 6 LiF composition, reduced by tapping 6 Porosity of the LiF composition.

[0138] Thereafter, the cylindrical mold was filled in a hydraulic press, ...

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Abstract

The objective of the present invention is to provide a dosimeter container which contributes both to an increase in radiation dose measurement accuracy and a reduction in the size of a measuring device. The dosimeter container (10) of the present invention is provided with an accommodating portion (11) and a shielding portion (12) surrounding the accommodating portion (11). The accommodating portion (11) accommodates a radiation dose measuring instrument which measures a dose of prescribed radiation other than neutron beams. The shielding portion (12) comprises a member of a material which transmits the abovementioned prescribed radiation and shields neutron beams. The shielding portion (12) is preferably a sintered body of LiF, in particular a sintered body of 6LiF. The shielding portion(12) has at least two shielding portion constituent members (a main body portion (12A) and a lid portion (12B)), and adjacent members are capable of abutting one another, and more preferably capable of mating with one another. The size of the accommodating portion (11) is substantially the same as or larger than the size of the radiation dose measuring instrument, and the accommodating portion (11) extends through all the constituent members. The dosimeter container (10) is suitable for use as a dose measuring body (1) in which a radiation dose measuring instrument (51) is accommodated in theaccommodating portion (11).

Description

technical field [0001] The present invention relates to a dosimeter container and a dosimeter for measuring doses of radiation such as gamma rays other than neutron rays. Background technique [0002] In recent years, the research and development of boron neutron capture therapy (BNCT: Boron Neutron Capture Therapy) as a means of cancer treatment is rapidly advancing. Boron neutron capture therapy is radiation therapy using neutron rays. First, the patient is given a boron compound that specifically concentrates into cancer cells. Then, neutron rays with energy controlled within a predetermined range are irradiated to the cells in which the boron compound has accumulated. Boron compounds collide with neutron rays to produce alpha rays. Cancer cells are killed by this α-ray. [0003] The prospect of boron neutron capture therapy as a cancer treatment is highly anticipated and is gradually entering the clinical trial stage. The neutron ray irradiation device used in boron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00G21F3/00G21F5/00
CPCA61N5/00G01T1/02G01T7/00G21F3/00G21F1/10G01T1/00G21F5/00A61N5/10A61N2005/109G01T7/02G21F5/06
Inventor 薄秀明古屋日高高桥真树石川秀德
Owner NIPPON LIGHT METAL CO LTD
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