CN1139843C - Method for preparing X-ray image storage plate - Google Patents
Method for preparing X-ray image storage plate Download PDFInfo
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- CN1139843C CN1139843C CNB001245775A CN00124577A CN1139843C CN 1139843 C CN1139843 C CN 1139843C CN B001245775 A CNB001245775 A CN B001245775A CN 00124577 A CN00124577 A CN 00124577A CN 1139843 C CN1139843 C CN 1139843C
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- image plate
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Abstract
The present invention relates to a method for preparing an X-ray image storage plate. Image plates prepared by the existing technologies have the weaknesses of complicated operation and low resolution. The present invention has a technical scheme that under the condition of the existence of activated carbon, a cementing agent (polyacrylic ester) is spread on raw material to prepare the X-ray image storage plate, wherein the activated carbon is added in casing tubes outside a crucible containing the raw material for reaction, and is also added on the surfaces of the impacted raw material. The X-ray image storage plate prepared by the present invention has the advantages of high sensitivity, wide dynamic range, high resolution, no pollution and quick imaging, and can be used repeatedly for myriads of times; images are digitized, obtained data are represented by digits, and can be processed directly by computers, and the image storage plate is applicable to X-ray machines in hospitals.
Description
The present invention relates to the luminescent material of X ray, specifically relate to the preparation method of X ray memory image plate.
X ray is to be found by the roentgen in 1895, since the whole century, people are in order to reduce x-ray irradiation dosage and to improve picture quality, carrying out unremitting effort aspect sensitivity that improves intensifying screen and film and the sharpness, simultaneously, developed technology such as ray tomoscan, image intensifier tube, X-ray television, reduced irradiation dose and improve these two problems of image definition but all fail to solve simultaneously.Along with electronic technology and fast development of computer technology, the storage of radiodiagnosis image has become new problem again with transmission in recent years.(PictureArchiving and Communication System, development an urgent demand PACS) accounts for the radioscopic image of medical image total amount 80% and realizes digitizing the medical image storage transmission system.Yet nearly all hospital is still using screen a slice combined system of many decades history.Fuji Photo Film Corporation utilized the X ray storage luminescent material at first to develop X ray computed image technology in 1984, had not only solved at one stroke the problem that reduces irradiation dose and improve image definition, and was the revolutionary change on the developing method.Be limited to computer technology level at that time, the said firm has only made a huge model machine that takes up an area of tens of square metres.20 TCR-2 model machines have been manufactured experimently in company of Fuji in 1989 and Toshiba's cooperation.Electronic technology and fast development of computer technology not only make the storage of image and transmission problem be readily solved, and make the faster convenience of operation, and automaticity is higher, and greatly reduces cost.To summer nineteen ninety-five, in the hospital of Japan all parts of the country, equip 2500 each model computed image instrument of TCR that company of Fuji produces, and captured American market, after this, Siemens, Kodak also all succeed in developing.
Electronic technology develops with rapid changepl. never-ending changes and improvementsly, and computing machine is come into huge numbers of families just overwhelmingly, and information network rapidly spreads in the big ground of China as telephone network originally, and the digitizing of radioscopic image is the inexorable trend of X ray medical diagnosis development.
(Image Plate is called for short image plate: the IP plate) be the X ray surface detector made from a kind of X ray storage luminescent material (Area Detector).See through the X ray of tissue, in many capture attitude electronics and the holes of IP plate surface generation along Two dimensional Distribution, these electronics and hole are directly proportional with the x-ray dose that this point is accepted in the distribution density of IP plate surface every bit, and the Density Distribution in IP plate these electronics of surface and hole is consistent with the intensity distributions of X ray in other words.X ray image just stores with the sub-image form that the electron hole distributes like this.Then, with the laser beam that focuses on the capable hardwood scanning of X-Y is done on IP plate surface, under the excitation of laser beam, the electronics and the hole of capturing attitude will be released generation fluorescence, and the electron hole density of the fluorescence intensity of every bit and this point (just x-ray dose) originally is directly proportional.With photomultiplier the fluorescence pointwise is received, change the electric signal of sequential into, through amplifying and mould/transformation of variables changes digital signal into and enters computing machine and make digital picture and handle, on video screen, demonstrate the X ray transmission image at last, the confession diagnosis again.Image can be printed on the paper, be archived in the CD or by networking and be sent to other section office or other hospital.
Up to now, there is the method for the various X ray memory image plates of preparation countries in the world, but simple to operate, and the high method of image resolution but seldom.
The objective of the invention is to overcome above-mentioned weak point of the prior art, and a kind of preparation method uncomplicated, the good image plate of performance that operates is provided.
Purpose of the present invention can reach by following measure, with raw material BaF
2: BaBr
22H
2O: Eu
2O
3Equivalent proportion is 1: 0.9～1.1: 0.05～0.05, wherein Eu
2O
3With hydrobromic acid dissolving, 80 ℃～200 ℃ heating, dry 24～72 hours, levigate, the NH of adding 0.3～0.8 equivalent
4F, in the presence of activated charcoal, raw material: the activated charcoal weight ratio is 1: 1.5,700 ℃～900 ℃ heating, roasting 5～15 hours makes X ray storage luminescent material barium fluobromide europium (1), consists of:
Ba
1-xEu
xF
1+yBr
1-y (1)
Wherein: 0＜x＜0.10 ,-0.20＜y＜0.20
Activated charcoal will be added in the crucible sleeve pipe outward that fills reaction mass, also will be added on the raw material surface after compressing; The F/Br equivalent proportion is the positive number beyond 1; 20～50% of the adding raw material weight NH when roasting
4F; The luminescent material mean grain size is between 5～50 μ m; Then, use the jointing compound polyacrylate, adopt coating technique, make X ray memory image plate; The preparation of polyacrylate jointing compound: 80 ℃～85 ℃ of temperature, methyl acrylate: butyl acrylate: the butyl acetate weight ratio is 100: 10～30: 60～90, logical N
2, 20～30 hours reaction time, the initiating agent benzoyl peroxide, raw material: the initiating agent weight ratio is 100: 0.03～0.08, stirs 1～3 hour.
Traditional X-ray film among the present invention compared to existing technology has following advantage;
1. highly sensitive, can reduce X-radiation dosage significantly;
2. dynamic range is wide, can reach 10
5Magnitude is 8～4 * 10
4Individual x-ray photon/pixel is linear, and error is no more than 5%;
3. the resolution height can reach 5-10pixels/mm;
4. equivalent quantum efficiency height can surpass 80%, and noise effect is little;
5. do not pollute,, both saved silver, exempted pollution again without film;
6. use repeatedly, image plate can use up to ten thousand times repeatedly;
7. image digitazation, imaging is rapid, obtains the data numeral, directly uses Computer Processing.
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
In there-necked flask, add methyl acrylate 16 grams respectively, butyl acrylate 4 grams, butyl acetate 10 grams stir, logical N
2, 82 ℃ of temperature of reaction, 25 hours reaction time, at this moment, add initiating agent benzoyl peroxide 0.015 gram, stirred 2 hours, promptly make the polyacrylate jointing compound.
In reaction vessel, add 1 equivalent BaF respectively
2And BaBr
22H
2O adds 0.02 equivalent Eu again
2O
3, Eu wherein
2O
3Be dissolved in the hydrobromic acid, excessive hydrobromic acid is removed in 120 ℃ of heating during heating, and dry 50 hours, potpourri is levigate, and add 35% NH of raw material weight
4F, reactant is put into corundum crucible, compacting, cover layer of active carbon on the surface, then, this crucible is placed in the big crucible that fills activated charcoal in cabinet-type electric furnace 800 ℃, roasting 10 hours, roasting is reflected at carries out high temperature solid state reaction in the reducing atmosphere, be prepared into luminescent material barium fluobromide europium, grind after the cooling, mean grain size is between 5～50 μ m, be coated with the polyacrylate jointing compound, make jointing compound, and cover one deck jointing compound film attached on the sheet base, promptly make X ray memory image plate, on the image readout meter, can demonstrate the very high image of resolution.
X ray storage luminescent material of the present invention is a kind of optical stimulated luminescence material, under the X ray width of cloth shines, produces the electronics and the hole that are present in the crystal defect, and they exist to capture the attitude form, thereby the dosage of X ray is stored pro rata.Under the electromagnetic radiation excitation of 500～800 mum wavelengths, electronics and hole are compound again subsequently, and the NE BY ENERGY TRANSFER that discharges is given luminescent center (Eu
2+Ion), produce Eu
2+This transition emission is measured in transition emission between the d-f electron level of ion, can release the X ray energy that shines on the image plate.
The prepared X ray memory image of the present invention plate is used for the image plate of medical x-ray machine.
Claims (5)
1.X the preparation method of ray memory image plate comprises raw material BaF
2: BaBr
22H
2O: Eu
2O
3Equivalent proportion is 1: 0.9～1.1: 0.005～0.05, wherein Eu
2O
3With hydrobromic acid dissolving, 80 ℃～200 ℃ heating, dry 24～72 hours, levigate, the NH of adding 0.3～0.8 equivalent
4F is characterized in that: activated charcoal exists down, and raw material: the activated charcoal weight ratio is 1: 1.5,700 ℃～900 ℃ heating, and roasting 5～15 hours makes X ray storage luminescent material barium fluobromide europium, consists of:
Ba
1-xEu
xF
1+yBr
1-y
0＜x＜0.10 wherein ,-0.20＜y＜0.20
Then, use the jointing compound polyacrylate, adopt coating technique, make X ray memory image plate.
2. the preparation method of image plate according to claim 1 is characterized in that: the F/Br equivalent proportion is the positive number beyond 1.
3. the preparation method of image plate according to claim 1 is characterized in that: the 20～50%NH that adds raw material weight during roasting
4F.
4. the preparation method of image plate according to claim 1, it is characterized in that: the luminescent material mean grain size is between 5～50 μ m.
5. the preparation method of image plate according to claim 1 is characterized in that the preparation of polyacrylate jointing compound: 80 ℃～85 ℃ of temperature, methyl acrylate: butyl acrylate: the butyl acetate weight ratio is 100: 10～30: 60～90, logical N
2, 20～30 hours reaction time, the initiating agent benzoyl peroxide, raw material: the initiating agent weight ratio is 100: 0.03～0.08, stirs 1～3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001245775A CN1139843C (en) | 2000-09-22 | 2000-09-22 | Method for preparing X-ray image storage plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001245775A CN1139843C (en) | 2000-09-22 | 2000-09-22 | Method for preparing X-ray image storage plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1283803A CN1283803A (en) | 2001-02-14 |
| CN1139843C true CN1139843C (en) | 2004-02-25 |
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|---|---|---|---|
| CNB001245775A Expired - Fee Related CN1139843C (en) | 2000-09-22 | 2000-09-22 | Method for preparing X-ray image storage plate |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023308B (en) * | 2010-09-14 | 2013-07-10 | 中国原子能科学研究院 | Radiation imaging system based on radiation photoluminescence image board with radiation memory function |
| CN106324007B (en) * | 2016-10-11 | 2019-10-22 | 上海洞舟实业有限公司 | A kind of flexible el X-ray memory probe |
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2000
- 2000-09-22 CN CNB001245775A patent/CN1139843C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
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Address after: 100871 School of chemistry, Peking University, Beijing Patentee after: Ruan Shenkang Patentee after: Beijing volcano rubber product design and Research Institute Co Ltd Address before: 100871 School of chemistry, Peking University, Beijing Patentee before: Ruan Shenkang Patentee before: Beijing Rubber Products Designing Institute |
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Granted publication date: 20040225 Termination date: 20091022 |