CN102495523A

CN102495523A - Imaging plate (IP) cassette

Info

Publication number: CN102495523A
Application number: CN2011103897551A
Authority: CN
Inventors: 董荣胜; 麻正义; 王念
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2011-09-28
Filing date: 2011-11-30
Publication date: 2012-06-13

Abstract

The invention discloses an imaging plate (IP) cassette, which comprises a cassette body and a IP arranged in the cassette body, wherein the IP comprises a protective layer, a fluorescent layer and a substrate; the fluorescent layer is coated on one face of the substrate; and the protective layer is overlapped with one face of the substrate, which is coated with the fluorescent layer. The IP cassette is characterized in that: a scattered ray filtering layer is overlapped with the other face of the substrate, and is a lead plate; and the thickness of the lead plate is 0.5-1.5 millimeters, and is preferably 1 millimeter. In the invention, the scattered ray filtering layer lead plate is arranged, so that rays can be effectively absorbed, and the damage of scattered rays to a detected person and entourages is reduced; the scattered rays can be absorbed by the lead plate, so that the generation of secondary rays is reduced, images are clear, image residual latent images are reduced, and the image definition is increased; and the IP cassette has the advantages of simple structure, low cost and good protection effect.

Description

A kind of image IP plate magazine

Technical field

The present invention relates to medical equipment, especially a kind of computer x-ray image IP plate magazine.

Background technology

Computed radiography (computed radiography; CR) be that (imaging plat IP) as carrier, reads X line imaging information by laser with the image plate that can write down X line imaging information; Read processing through X line exposing and information, form the digital plain image.In the CR imaging system, the formation of image information adopts image plate (IP plate) to accomplish with preliminary storage.The image plate is that a kind of barium fluobromide crystalline solid that contains micro-europium is coated in the product on the support.After X ray penetrated human body, because the inside of human body tissue is different for the receptivity of X ray, it no longer was uniformly that the ray energy that penetrates distributes, but has the specific distribution of organization of human body information, and X ray at this moment makes the sensitization of image plate and forms latent image.

The principle of work of image plate is: see through the X ray of tissue, produce on image plate surface Two dimensional Distribution, with trapped electron and hole that the x-ray dose of this point acceptance is directly proportional, X ray image just gets up with the sub-image stored in form of electron hole distribution; Then, the capable auspicious scanning of X-Y is done on image plate surface, under the excitation of laser beam, captured attitude electronics and hole and will be released out and produce the fluorescence that is directly proportional with the electron hole density of this point with the laser beam that focuses on; The fluorescence pointwise receives, and changes the electric signal of sequential into, changes digital signal entering computing machine into through mould/transformation of variables again and does the digital picture processing, on video screen, demonstrates the X ray transmission image at last.Basic mechanism is; Trace divalent europium fluorine barium halide crystal has photoluminescence property and promptly energy is all stored during excitation of X-rays for the first time; When receive once more excite with the first time energy all discharge; Can the remaining image after the release of image plate energy thoroughly be eliminated and the recovery primary characteristic through strong illumination, can be repeatedly used.Image plate magazine is the critical component of computed radiography, is mainly used in the throwing of accomplishing computed radiography and shines exposure-collection of images and excite scanning-image to read process.

The structure of image plate such as commercially available daily output FUJI image plate comprises protective seam, fluorescence coating and substrate, and the effect of protective seam is to prevent that fluorescence coating from sustaining damage; Fluorescence coating is mixed in the polymer material by fluorescent material, is coated on the substrate and processes; The main effect of substrate is the fixing fluorescent material of fluorescence coating; Protective seam simultaneously splices with that of substrate that scribbles fluorescence coating, and the image plate is arranged in the magazine.

The factor that the image project rings the CR imaging comprises 1. image plate quantum noises; 2. the residual latent image of image plate; 3. the damage of image plate.

The X line belongs to electromagnetic wave, and wavelength is 0.0006-50nm, and the wavelength that is used for the X line imaging is 0.031-0.008nm (when being equivalent to 40-150KV), in electromagnetic wave, occupy between gamma-rays and the ultraviolet ray, and very high frequency, penetration power is strong, can make atom and molecular ionizationization.

In recent years, the examinee is when accepting the CR detection, and the radiation insult of the X ray that receives more and more comes into one's own.For radiation sickness, absorbed dose is big more, and radiation insult is serious more, and when accumulated dose was identical, high dose rate was more obvious than the damage of low dose rate irradiation.In a single day the X line gets into the biological effect that is absorbed generation behind the human body people is known from experience the generation radiation damage, and the degree of damage is decided with absorbed dose.Generally speaking, low dose still is not enough to constitute injury, and heavy dose of or added up multiple dose and can cause histocyte to destroy and the pathology of blood circulation system aspect.Because people are indifferent to X line radiation protection consciousness, thereby the protection of having ignored the examinee causes the examinee and the person of accompanying and attending to receive unnecessary radiation, even medical tangle.Examinee's X line radiation protection attracts great attention in the world already, and the incidence of malignant disease and genetic disease is brought out in ionising radiation, depends on the collective dose equivalent that accepted by photograph person.If body in a long time continuously or be interrupted when receiving roentgen radiation x and reaching doses, the cell in the tissue is by the ionising radiation deactivation, thereby causes radioactive damage.Also ill-effect can appear in long term, the aftereffect far away of meaning.The radiation cataract that is caused by ray etc. belongs to the determinacy effect, and can being accumulated to a certain degree in vivo, the back takes place.Stochastic effect once irradiating probably will be diseases induced.Radioactive dose is many more, and the probability that induces an illness is big more, and it is exactly a kind of stochastic effects that ray brings out cancer.The radiograph test meeting causes the part body cell impaired, and this damaged cell begins carcinous duplicating when hypoimmunity or cancer factor exist, become cancerous lesions.

Existing C R system exists examinee and the person of accompanying and attending to damages greatly, the image retention latent image is more, image definition is not high enough shortcoming.

Summary of the invention

The objective of the invention is the deficiency to above-mentioned prior art, and provide a kind of to the examinee and the person of accompanying and attending to damage little, the image retention latent image is less, image definition is higher, and image IP plate magazine simple in structure, that cost is low.

The objective of the invention is to realize through following technical scheme:

A kind of image IP plate magazine; Comprise box body and be arranged on the image plate in the box body; The image plate comprises protective seam, fluorescence coating and substrate, and fluorescence coating is coated on the one side of substrate, and protective seam simultaneously splices with that of substrate that scribbles fluorescence coating; Different with prior art is: the another side that is provided with scattered ray filtering layer and substrate splices, and described scattered ray filtering layer is a stereotype.

The thickness of said stereotype is 0.5-1.5mm, and preferred thickness is 1mm.

The present invention can effectively absorb ray through scattered ray filtering layer stereotype is set, and reduces the injury of scattered ray to examinee and entourage; Stereotype can also the ABSORPTION AND SCATTERING line, reduce the generation of Secondary radiation, makes clear picture and the image retention latent image is reduced, and has increased image definition; The present invention is simple in structure, cost is low, and protection effect is good.

Description of drawings

Fig. 1 is the structural representation of embodiment;

Fig. 2 is the decomposing schematic representation of Fig. 1.

Among the figure, 1. box body 2. protective seams 3. fluorescence coatings 4. substrates 5. scattered ray filtering layers.

Embodiment

Below in conjunction with accompanying drawing and embodiment content of the present invention is done further to set forth, but be not qualification of the present invention.

Embodiment:

With reference to Fig. 1 Fig. 2; A kind of image IP plate magazine comprises box body 1 and is arranged on the image plate in the box body 1 that the image plate comprises protective seam 2, fluorescence coating 3 and substrate 4; Fluorescence coating 3 is coated on the one side of substrate 4; That of protective seam 2 and the substrate 4 that scribbles fluorescence coating 3 simultaneously splices, and the another side that is provided with scattered ray filtering layer 5 and substrate 4 splices, and scattered ray filtering layer 5 is a stereotype.

The thickness of stereotype is 0.5-1.5mm.

Particularly, adopt Germany to produce the DA0p010/50 stereotype, thickness is 1mm, is equivalent to lead equivalent 0.5MMpb, homemade 500mAX line machine; Daily output FUJI image plate; Environment level X, gamma dose rate appearance are produced in Xi'an; 9206 dosemeters are produced in Chengdu.

Will with the consistent stereotype of magazine box body 1 interior size, insert the dorsal part of image plate, X line machine is shone from top to bottom, magazine lies against on the examination couch, Jiao-pitch of fins 1m, 75Kv, 10MAS, the adjustment raster width is big or small consistent with film magazine.X, gamma dose rate appearance arbitrarily place respectively apart from film magazine 1m, 3m place, respectively to have, no stereotype magazine exposure 3 times, average.

Bulb is got the cross-table projection mode, Jiao-pitch of fins 1m, 75Kv, 10MAS, adjustment raster width and film magazine size is consistent, 9206 dosemeters through magazine over against the bulb window, apart from being 1m, respectively to have, no stereotype magazine makes public 3 times, average.

Examinee's lumbar vertebrae is carried out positive bit slice takes pictures.The result shows that tissue thickness is thick more, density is high more.The image that uses the scattered ray filter to obtain is more clear than not using the image of scattered ray filter.

Table 1 is X, gamma dose rate appearance measurement result.

Table 1

Can find out have stereotype and no stereotype in the value that the 3m distance records significant difference to be arranged from table 1, dosage reduces 69.1%.

Table 2 is 9206 dosemeter measurement results.

Table 2

No stereotype	Stereotype is arranged
		0.0803cgy	0.0012cgy

Can find out more that from table 2 having installed the direct projection roentgen dose X that records at the 1m place behind the stereotype additional has utmost point marked difference.

Stereotype can effectively receive the ray people and know that all altogether the part ray that dosemeter can measure is actually the Secondary radiation of airborne ray at random and minute quantity, and the declaratives harm ray is effectively absorbed by stereotype.

The result that above-mentioned instantiation obtains, the quality of image that is provided with scattered ray filtering layer 5 stereotypes obviously is better than the quality that influences of no stereotype, and image resolution is high, clear-cut margin, latent image reduces, and it is more clear that fine result shows.

Instance through above proves: the present invention utilizes the scattered ray filtering layer 5 stereotypes ability ABSORPTION AND SCATTERING line that increases, the generation that reduces Secondary radiation, has reduced the residual latent image of image plate, makes clear picture; Simultaneously, utilize stereotype to absorb the principle of ray, reduce the injury of radiation, also reduced the influence of scattered ray surrounding environment to examinee and entourage.

Used stereotype selection should be smooth, complete, do not have distortion and hole, and size to fit is answered in cutting, and thickness should not be less than 0.5mm, and thickness is too thin, absorbs, filters the DeGrain of ray; Thickness should not surpass 1.5mm, to be advisable freely into and out of box body 1.General assembly (TW) increased to some extent after magazine installed stereotype additional, should note during use avoiding dropping or collided with and cause cracking and damage and cause image plate light leak.

The method is simple, has tangible practicality and realistic meaning, can apply.

Claims

1. image IP plate magazine; Comprise box body and be arranged on the image plate in the box body; The image plate comprises protective seam, fluorescence coating and substrate, and fluorescence coating is coated on the one side of substrate, and protective seam simultaneously splices with that of substrate that scribbles fluorescence coating; It is characterized in that: the another side that is provided with scattered ray filtering layer and substrate splices, and described scattered ray filtering layer is a stereotype.

2. image IP plate magazine according to claim 1, it is characterized in that: the thickness of said stereotype is 0.5-1.5mm.

3. image IP plate magazine according to claim 1, it is characterized in that: the thickness of said stereotype is 1mm.