CN101282689A - Radiographic imager - Google Patents
Radiographic imager Download PDFInfo
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- CN101282689A CN101282689A CNA200680037493XA CN200680037493A CN101282689A CN 101282689 A CN101282689 A CN 101282689A CN A200680037493X A CNA200680037493X A CN A200680037493XA CN 200680037493 A CN200680037493 A CN 200680037493A CN 101282689 A CN101282689 A CN 101282689A
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- 238000003384 imaging method Methods 0.000 claims abstract description 35
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- 238000012423 maintenance Methods 0.000 claims description 2
- 210000000481 breast Anatomy 0.000 abstract description 58
- 230000003321 amplification Effects 0.000 description 102
- 238000003199 nucleic acid amplification method Methods 0.000 description 102
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/484—Diagnostic techniques involving phase contrast X-ray imaging
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Abstract
A radiographic imager for performing phase contrast imaging. The region of the position of the subject at which the phase contrast imaging is possible is extended, and more patients can be imaged. The radiographic image is characterized in that a control unit (16) of a breast image imaging device (1) controls a drive unit (17) in response to a depression of a position adjustment switch of an input unit (14a) so as to adjust the position of a subject table (10); the position of a press plate (11) is adjusted by the operator such as a radiographer, the subject (H) is pressed and fixed; when the magnification of the phase contrast imaging is inputted through the input unit (14a), the control unit (16) control a drive unit (20) according to the positions of the subject table (10) and the press plate (11) and the inputted magnification so as to elevate/lower a holding member (8); and thereby the relative distances between the subject table (10) and a radiation source (6) and between the subject table (10) and a radiation image detector are adjusted to the distances satisfying the magnification=(R1+R2)/R1.
Description
Technical field
The present invention relates to X-ray imaging apparatus, relate in particular to and to take the X-ray imaging apparatus of phase contrast than image.
Background technology
Utilize lonizing radiation to see through the radiographic equipment of material effect, be widely used in medical diagnostic imaging and nondestructive inspection etc.Especially the X-ray imaging apparatus that adopted of breast photography, common method for imaging be with the incorporate subject platform of radiation image detector on fixedly subject take.But, the subject size of taking with this method is the actual size of subject, contrasting of image is insufficient, judges that in order to observe breast lesion partly waits the medical photographic attachment of specific part microstructure, exists the insufficient problem of distinctiveness of image as being used for.
At this, in recent years, there is a kind of phase contrast of taking to be proposed than the X-ray imaging apparatus of image.Phase contrast is a kind of image that image is contrasted in refraction that is referred to as again than image, be considered to the monochromatic parallel radiography that obtains by from SPring-8 isoradial source in the past, or be the little focus radiation source photography about 10 (μ m) and the image that can access by focal spot size, but it is now know that, also can obtain this image with the radiation source (focal spot size is the little focus radiation source of 30～300 (μ m)) of uses such as general curative facility.
The technology of record in the patent documentation 1 for example, wherein, do not adopt necessary synchronous acceleration radiating light of large-scale plant or X line focus size little in addition can be considered X line source into point source, also can access the edge reinforced effects.According to this patent documentation 1, when X line focus dimension D when 30 (μ m) are above, satisfy the zone of (m) formula of R1 〉=(D-7)/200 at radiation source X spool to the distance R 1 of subject, and the distance R 2 between subject and the X line detector just can access edge enhanced images when 0.15 (m) is above.Be macrophotography at this moment, amplification=(R1+R2)/R1.
But, in the past, when in the X-ray imaging apparatus that carries out the photography of phase contrast ratio, changing amplification, for example described in patent documentation 2, changed R2 by fixing above-mentioned R1 and carried out.
Patent documentation 1: the spy opens the 2001-91479 communique
Patent documentation 1: the spy opens the 2004-173879 communique
The problem that the invention desire solves
Pattern has been shown in the X-ray imaging apparatus in the past among Fig. 7, when taking breast than photography, the detector support 12 (the numeral amplification among the figure) of radiation source 6, subject H, supporting radiation image detector (X line detector), carry out the position relation of phase contrast than floor (floor) in the photographic studio of photography and ceiling (ceiling) with phase contrast.In the X-ray imaging apparatus in the past, because the distance R between radiation source 6 and the subject H 1 is fixing, so radiation source 6 only is positioned at the vertical direction top from subject H position R1 distance.That is, corresponding subject position, radiation source 6 vertical positions (when subject is breast, from the floor to the height of subject H) raises.But the space in photographic studio is limited.Therefore, when the higher patient of height waits the position of the higher and subject H in subject H breast position and the distance between the ceiling less than R1, then can not photograph.In addition, the position of detector support 12 is to make according to the position of subject H and amplification, and the big more R2 of amplification is also big more.Therefore, the patient that height is lower waits subject H breast position lower, and the possible amplification of photographing sometimes is restricted.
Summary of the invention
Problem of the present invention is in carrying out the X-ray imaging apparatus of phase contrast than photography, realizes enlarging the scope of the phase contrast subject position more possible than photography, enables to be applicable to more patients' photography.
With the means that solve problem
In order to solve above-mentioned problem, the invention of the 1st record is a kind of X-ray imaging apparatus, comprising: radiation source, and focal spot size D is more than 30 (μ m); Detector supporting means, supporting radiation image detector, it detects the lonizing radiation from described radiation source ejaculation through subject; The subject platform is arranged between described radiation source and the described detector supporting means, is used for fixing subject; Wherein, be that R1 〉=(D-7)/200 (m) carries out phase contrast than photography with described radiation source to the distance R 1 of described subject, X-ray imaging apparatus is characterised in that, has:
The maintenance means, it is certain being used for keeping the distance between described radiation source and the described detector supporting means;
Regulating measure, the relative distance of regulating described relatively radiation source of described subject platform and described radiation image detector.
The invention of the 2nd record is the invention of record in the 1st, it is characterized in that the distance L (m) between described radiation source and the described detector supporting means is more than 0.95 (m).
The invention of the 3rd record is the invention of record in the 2nd, it is characterized in that focal spot size D=100 (μ m).
The invention of the 4th record is the invention of putting down in writing in any one of the 1st to the 3rd, it is characterized in that,
Described subject platform is installed after can electing from multiple different size,
And have: subject platform dimension information is obtained means, obtains the dimension information of the described subject platform of being loaded onto; Control device according to the described subject platform dimension information of being obtained, is controlled described regulating measure.
The invention of the 5th record is the invention of record in the 4th, it is characterized in that, described control device is according to the described subject platform dimension information of being obtained, described regulating measure is adjusted to described relative distance, make the radiation image of the subject integral body that is placed on the subject platform, can be by the distance that is detected by the radiation image detector of described detector supporting means supporting.
The invention of the 6th record is the invention of record in the 4th or the 5th, it is characterized in that,
And have the detector size and obtain means, it obtains the dimension information of described radiation image detector,
Described control device is controlled described regulating measure according to the dimension information of described subject platform dimension information of being obtained and the described radiation image detector of being obtained.
The invention of the 7th record is the invention of putting down in writing in any one of the 4th to the 6th, it is characterized in that, and has:
The setting means are set the photography multiplying power;
Control device, it is according to described subject platform dimension information of being obtained and the described photography multiplying power that is set, when judgement is photographed with the described photography multiplying power that is set, place the radiation image of the subject integral body on the described subject platform, can be by being detected by the radiation image detector of described detector supporting means supporting, according to described judged result, control described regulating measure.
The invention of the 8th record is the invention of record in the 7th, it is characterized in that,
And have the warning means that give a warning,
When described control device is judged, when photographing with the described photography multiplying power that is set, when placing the part of the radiation image of the subject on the described subject platform not detect by described radiation image detector, described warning means are given a warning, when the photography enabling signal with the described photography multiplying power that is set is transfused to, according to the described photography multiplying power that is set, control described regulating measure, make it regulate described relative distance.
The invention of the 9th record is the invention of record in the 7th or the 8th, it is characterized in that,
Described control device is according to the dimension information of described subject platform dimension information of being obtained and the described radiation image detector of being obtained, when judgement is photographed with the described photography multiplying power that is set, place the radiation image of the subject integral body on the described subject platform, can be by being detected by the radiation image detector of described detector supporting means supporting.
The invention of the 10th record is the invention of putting down in writing in any one of the 1st to the 9th, it is characterized in that,
Described detector supporting means have the mouth of packing into/shirk of the described radiation image detector of packing into/shirk,
Be provided with the lonizing radiation curtain-shaped cover member, it covers the space between described subject platform and the described detector supporting means, this lonizing radiation curtain-shaped cover member with described detector supporting means on mouthful corresponding position of packing into/shirk on, formed the peristome that the radiation image detector can pass through.
The invention of the 11st record is the invention of record in the 10th, it is characterized in that, described lonizing radiation curtain-shaped cover member comprises: the 1st lonizing radiation curtain-shaped cover member, and when it covers the photography of the 1st photography multiplying power, the space between described subject platform and the described detector supporting means; The 2nd lonizing radiation curtain-shaped cover member, when it covers the photography of the 2nd photography multiplying power when described subject platform is relative with the distance between the described detector supporting means photographs greater than described the 1st photography multiplying power, the space that occurs between described the 1st lonizing radiation curtain-shaped cover member and the described subject platform; Described peristome is formed on described the 1st lonizing radiation curtain-shaped cover member.
The effect of invention
According to the invention of record in the 1st, in carrying out the X-ray imaging apparatus of phase contrast, can carry out phase contrast and obtain expansion, so can be applicable to photography to more patients than the scope of the subject position of photography than photography.
Invention according to record in the 2nd, the 3rd can guarantee that the phase contrast of photographs compares effect.
Invention according to record in the 4th, the 5th, because according to the relative distance between subject platform size adjustment subject platform and the detector supporting means, so can prevent the image shortcoming of the subject part that produces owing to employed subject platform size.
Invention according to record in the 6th, in the X-ray imaging apparatus of radiation image detector size variable, can prevent the image shortcoming of the subject part that produces owing to employed subject platform size and radiation image detector size.
According to the invention of record in the 7th, the 8th, when photographing, can prevent that the image of the subject part that produces owing to employed subject platform size is short of with the photography multiplying power that is set.
Invention according to record in the 9th, in the X-ray imaging apparatus of radiation image detector size variable, can prevent the image shortcoming of the part of the subject that produces owing to employed subject platform size and radiation image detector size.
According to the invention of record in the 10th, in carrying out the X-ray imaging apparatus of phase contrast, can improve the easiness of packing into/shirk of the radiation image detector when using the lonizing radiation curtain-shaped cover member than photography.
According to the invention of record in the 11st, can both use the photography of lonizing radiation curtain-shaped cover member with the 1st or the 2nd any one photography multiplying power, and can be under the state of use lonizing radiation curtain-shaped cover member, the radiation image detector of easily packing into/shirk.
Description of drawings
Fig. 1: the configuration example sketch map of the breast image photographic attachment 1 that the present invention relates to.
Fig. 2: the internal structure pattern diagram of the photographic attachment body 2 of breast image photographic attachment 1.
Fig. 3: the functional structure block diagram of breast image photographic attachment 1.
Fig. 4: phase contrast is than the principle key diagram of photography.
Fig. 5: when taking breast image in the breast image photographic attachment 1, the position relation schema sketch map of radiation source 6, subject H, detector support 12, floor and ceiling.
Fig. 6: in the breast image photographic attachment 1, when distance L (R1+R2) between change radiation source 6 and the detector support 12 and amplification are taken, the visual evaluation result sketch map of each photographs.
Fig. 7: breast photography is in the past used when taking breast image in the X-ray imaging apparatus, the position relation schema sketch map of radiation source 6, subject H, detector support 12, floor and ceiling.
Gu 8: the ideograph (profile) of subject platform assembled portion on the subject platform 10 of the Fig. 1 that sees from above and the support 5.
The control device 16 practiced Position Control of Fig. 9: Fig. 3 are handled the flow process signal of A.
The flow process signal of the control device 16 practiced Position Control treatments B of Figure 10: Fig. 3.
Figure 11: the structure example sketch map of loading onto the breast image photographic attachment 1 of the 1st lonizing radiation curtain-shaped cover member 22.
Figure 12: the structure example sketch map of loading onto the breast image photographic attachment 1 of the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23.
Figure 13: the pattern diagram of subject platform 10, detector support 12 and the 1st lonizing radiation curtain-shaped cover member 22.
Figure 14: (a) the subject platform of seeing from right flank 10 and the ideograph of the 2nd lonizing radiation curtain-shaped cover member 23, the ideograph of the 2nd lonizing radiation curtain-shaped cover member of (b) seeing 23 from above.
Figure 15: (a) ideograph of seeing from right flank of loading onto the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23, the ideograph of (b) seeing of loading onto the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23 from the front.
Symbol description
1 breast image photographic attachment
2 photographic attachment bodies
3 support base station
4 fulcrums
6 radiographic sources
7 iris apparatus
8 support components
9 bodies
10 subject platforms
11 compel plate
12 detector supports
13 quantity of radiation detecting elements
14 operating means
14a input equipment
The 14b display device
15 power supply units
16 control device
17 driving devices
18 position detection parts
19 subject platform test sections
20 driving devices
21 buses
22 the 1st lonizing radiation curtain-shaped cover members
22a, 22b screw cave
The 22c peristome
23 the 2nd lonizing radiation curtain-shaped cover members
23a, 23b Magnet
Protuberance closes in 23c system
The specific embodiment
(the 1st embodiment)
The breast image photographic attachment 1 that present embodiment relates to is to carry out the X-ray imaging apparatus of phase contrast than photography.Below, with reference to accompanying drawing, the structure of the breast image photographic attachment 1 in the 1st embodiment is explained.
The configuration example of having shown breast image photographic attachment 1 among Fig. 1,2.Fig. 1 is the surface structure illustration intention of breast image photographic attachment 1, and Fig. 2 is that the inside of the photographic attachment body 2 of the breast image photographic attachment 1 shown in Fig. 1 constitutes the medelling sketch map.And in Fig. 2, operating means 14, power supply unit 15, driving device 17 and be the driving device 20 of regulating measure are connected on the control device 16 (illustrating among Fig. 3) for body 9 control devices, but diagram not here.Breast image photographic attachment 1 as shown in Figure 1, wherein, body 9 is provided with and supports base station 3, and its lifting leisure is supported on the base station 3, by being located at the fulcrum 4 that supports on the base station 3, is supporting photographic attachment body 2.Support base station 3 and drive lifting by the driving device 17 that motor etc. constitutes.Photographic attachment body 2 drives by driving device 17 and supports base station 3 liftings and can lifting, can also be that fulcrum rotates with described fulcrum 4 by driving device 17.
The top of photographic attachment body 2 is provided with the radiation source 6 that is used for shining lonizing radiation, and this radiation source 6 is by fulcrum 4 and support base station 3, is connected on the power supply unit 15 that is connected with body 9.Apply tube voltage and tube current by 15 pairs of radiation sources 6 of power supply unit.The radiation exposure mouth place of radiation source 6 is provided with the aperture mouth and opens and closes comfortable iris apparatus 7, as the irradiation field adjusting device, regulates the radiation exposure open country.
Focal spot size D is big more, and the quantity of radiation of irradiation is many more.In order to see through human body, in fact need a certain amount of above lonizing radiation, so in the breast image photographic attachment 1, the preferred focus dimension D is (μ m) in D 〉=30, it can shine takes the necessary quantity of radiation of human body.
As radiation line chart detector, except the above-mentioned cassette changer of taking in the stimulated Fluoropher thin film, can also use for example screen (sensitized paper)/film, FPD (flat panel detector) etc.
In the photographic attachment body 2,, from the slightly vertically extending position of radiation source 6, be provided with from the subject platform 10 of following surface bearing subject H and from the fixing plate for forcing 11 of subject H of top compressing below the radiation source 6 and above the detector support 12.As shown in Figure 2, subject platform 10 is installed on the support 5 of photographic attachment body 2, and is corresponding with 2 liftings of driving device 17 driving photographic attachment bodies, does lifting.Like this, can adjust the height of subject platform 10 according to the position (breast position) of subject H.Plate for forcing 11 can be provided with in the photographic attachment body 2 does not have illustrated back shaft lifting.
The position of plate for forcing 11 is detected by position detection part 18 (illustrating among Fig. 3), is output to the control device 16 of body 9.As position detection part 18, can adopt the infrared ray Exposure Metering, or on the back shaft rail that plate for forcing slides, establish the line resistance, measure modes such as carrying out the position differentiation from Resistance Value.
On the opposite one side of detector support 12 facing to the face of subject platform 10, be provided with the quantity of radiation detecting element 13 that detects irradiated quantity of radiation, the quantity of radiation that this quantity of radiation detecting element 13 detects is output to the control device 16 of body 9.
Body 9 has the control device 16 that is made of CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory).Fig. 3 represents the functional structure example of breast image photographic attachment 1.As shown in Figure 3, on the control device 16, connecting by bus 21: quantity of radiation detector 13, it detects irradiated quantity of radiation; Keyboard or touch panel are used for importing photography conditions etc.; Switch is adjusted in the position, is used for adjusting the position (switch is adjusted in the top of adjusting upward, and switch is adjusted in the below of adjusting) of subject platform 10 downwards; Operating means 14, it comprises input equipment 14a and display device 14b, and wherein, input equipment 14a has the setting means of setting photography multiplying power etc., and display device 14b is display devices such as CRT demonstration or liquid crystal display; Power supply unit 15 for the device power source; Driving device 17 makes 2 liftings of photographic attachment body by driving 3 liftings of support base station, and drives 2 rotations of photographic attachment body; Position detection part 18, it detects the position of plate for forcing 11; Subject platform test section 19, its detect subject platform 10 loaded onto with and dimension information; Driving device 20, it drives support component 8 liftings.Among the ROM of control device 16, remembering the control sequence and the various handling procedure that are used for controlling breast image photographic attachment 1 various piece, CPU is by moving with the association of this control sequence and various handling procedures, control the action of photographic attachment 1 various piece comprehensively, carry out phase contrast than photography.CPU controls as follows, in case for example adjustment switch in the position of input equipment 14a is pressed, then corresponding accessory drive 17 is adjusted the position of subject platform 10, operators such as photography technician adjust the position of plate for forcing 11, subject H is fixed, in case contrast the amplification of photography by input equipment 14a input phase, the position of then corresponding subject platform 10 and plate for forcing 11 and the amplification that is transfused to, accessory drive 20, make support component 8 liftings, regulate the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector thus.In case it is subsequent by input equipment 14a indication shooting, then apply tube voltage and tube current by 15 pairs of radiation sources 6 of power supply unit, make it to subject H irradiation lonizing radiation, in case reach fixed quantity of radiation being shot in advance from the quantity of radiation of quantity of radiation detecting element 13 inputs, then make radiation source 6 stop radiation exposure by power supply unit 15.
With reference to Fig. 4, the principle of phase contrast than photography described.Phase contrast is by establishing certain distance R2 between subject H and radiation image detector than photography, and the refractive edge of lonizing radiation that results from that obtains as shown in Figure 4 strengthens (enhancing is contrasted in refraction) image.Paint as pattern among Fig. 4, reflect when lonizing radiation pass object, the lonizing radiation density of object boundary inboard becomes dredges, and rises because of overlap lonizing radiation density with the lonizing radiation that do not pass object in the outside of object.Like this, the edge of subject boundary member is enhanced as image.This is because the phenomenon that object and air cause the refractivity of lonizing radiation.It is so-called edge enhanced images.
And the edge that is not only air shown in Fig. 4 and subject border strengthens, and the boundary member of the refractive index different piece in the object also can access same effect.Subject boundary member among the present invention can show as the boundary member of the different material of lonizing radiation refractive index.
As the situation that obtains this edge enhanced images with usage range sensitivity zone and plant bulk in the medical facilities, know, preferred focus dimension D (μ m) is when 30 (μ m) are above, distance R 1 from radiation source 6 to subject H (is opened the 2001-91479 communique with reference to the spy) for the distance R 2 that satisfies R1 〉=(D-7)/200 zone of (m) formula, and subject H and radiation image detector more than 0.15m.Here, the D in (m) formula of substitution R1 〉=(D-7)/200 is to be the focal spot size of unit with μ m, for example, and focal spot size D=30 (μ m), then R1 〉=(30-7)/200=0.115 (m).
When R1 less than R1 〉=(D-7)/200 shown in (m) formula apart from the time, then be difficult to obtain edge enhanced images or visuality is lower.In addition, increase intensity of radiation with R1 and die down, it is bigger that requisite space becomes.
By making distance R 2 more than 0.15 (m) from subject H to the radiation image detector, remove the line at random that comes from subject of the vividness deterioration that makes radiation image, further improve the enhanced visuality in edge.
If make R2 more than 0.15m, then be the macrophotography of amplification=(R1+R2)/R1.The relevant R1 here, its starting point is the focal position of radiation source 6, indicates to some extent on the radiation source of selling 6 usually.In addition, terminal point is the centrage of 10 fixed subject H of subject platform of fixedly subject position, here to leave subject platform 10 and the plate for forcing 11 equidistant positions centrage as subject H.Relevant R2, its starting point is a subject H centrage, terminal point is the top that the lonizing radiation of radiation image detector are accepted face, i.e. the top of detector support 12.
In the breast image photographic attachment 1, for the effect (edge reinforced effects) that can bring into play above-mentioned phase contrast ratio, focal spot size D 〉=30 (μ m), during photography, satisfying the distance R 1 〉=(D-7)/200 (m) from radiation source 6 to subject H and the scope of the distance R 2 〉=0.15 (m) subject H and the radiation image detector, by the position of control device 16 adjusting subject platform 10 relative radiation sources 6 and radiation image detector.
When promptly photographing, in case comprise the photography conditions of photography direction by input equipment 14a input, whether the photography direction that 16 judgements of control device are transfused to needs the photography direction of photographic attachment body 2 rotations, be when needing the photography direction of rotation, for example, when being the MLO (Medio-Lateral Oblique) from loxosis direction photography breast, driving device 17 makes the 2 whole rotations of photographic attachment body a certain amount of.In case the position of input equipment 14a is adjusted switch and is pressed, 16 of control device are accessory drive 17 correspondingly, adjusts the position of subject platform 10.Adjust the position of plate for forcing 11 by operators such as photography technicians, plate for forcing 11 compressings are subject H fixedly, in case contrasting the amplification of photography by input equipment 14a input phase (is from 1 in the present embodiment, 46 times, 1.75 doubly, 2.63 select doubly), control device 16 amount of movements and the positional information that comes from position detection part 18 according to subject platform 10, the position of specific shot object H, the position of corresponding subject platform 10 and plate for forcing 11 and the amplification that is transfused to, accessory drive 20, make support component 8 liftings, regulate the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector thus.At this moment, the amplification ground that makes (R1+R2)/R1 equal to be transfused to calculates the position of radiation source 6 and detector support 12, makes support component 8 liftings, so that radiation source 6 and detector support 12 are positioned at the position of trying to achieve.Then, in case be instructed to photography by input equipment 14a, control device 16a then applies tube voltage and tube current by 15 pairs of radiation sources 6 of power supply unit, make it subject H irradiation lonizing radiation, in case the quantity of radiation that is transfused to from quantity of radiation detecting element 13 reaches fixed quantity of radiation being shot in advance, then makes radiation source 6 stop radiation exposure by power supply unit 15.
The adjusting of the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector, R1 〉=(D-7)/200 the scope of (m), R2 〉=0.15 (m) is carried out satisfying.When the amplification that is transfused to did not satisfy above-mentioned scope, control device 16 made display device 14b demonstrate mistakenly complain to show.
As mentioned above, make support component 8 liftings, realized regulating the regulating measure of the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector by control device 16 accessory drives 20.
Pattern has been shown in the breast image photographic attachment 1 in the present embodiment when taking breast image among Fig. 5, radiation source 6, subject H, detector support 12 (the numeral amplification among the figure), carries out the position relation schema sketch map of phase contrast than floor in the photographic studio of photography and ceiling.As shown in Figure 5, in the present embodiment, even magnification change, the distance L of R1+R2 is certain, so, avoided that the distance between the big more then floor of amplification and detector support 12 also increases as in the past, if the subject position is low then can not guarantee this distance, the phenomenon that causes the possible amplification of photography to be restricted.Its result has enlarged the scope of phase contrast than the possible subject position of photographing, and can be applicable to more patient.
(the visuality evaluation of breast image photographic attachment 1)
Below, to the distance L between radiation source 6 and the detector support 12, and the visual evaluation result of photographs explains.
Shown with the distance L between radiation source 6 and the detector support 12 among Fig. 6, be that R1+R2 is 1555,1140,950,750 (mm), when each R1+R2 is carried out the breast image photography with 1.75 times, 1.46 times amplification, the visual evaluation result of each photographs.Evaluation be with visual, divide 4 grade evaluations to carry out, that is, and A: splendid, B: good, C: general, can (can be judged as is the degree that diagnosis is allowed), D: bad.Evaluation is carried out respectively by projects shown in Figure 6.
During evaluation, the device that breast image photographic attachment 1 adopts Konica Minolta Co., Ltd to study, the radiation image detector adopts レ ジ ウ ス プ レ one ト RP-5PM and the レ ジ ウ ス カ セ Star テ RC-110M that makes with company.With focal spot size D is D=100 (μ m).Radiation image detector after the breast photography, read pixel spacing with 43.75 (μ m) in the regius model 190 that Konica Minolta Co., Ltd makes reads, and the image of reading spacing that writes with 25 (μ m) in drypro model 793 is exported.At this moment, each pixel that makes reading images and each pixel of output image be 1: 1 corresponding, handle ground between not mending and do not export, the image that amplification is 1.75 times is exported with actual size 0.83 times of the image of 1.46 times of full sizes (actual size), amplification.In addition, during photography that amplification is 1.46 times, carry out 1.25 times amplification and handle between mending, use the image that has amplified between mending, export, but find visual and result's shown in Figure 6 difference with writing spacing 25 (μ m).
At this, the factor of influence " output " project is the R1 distance.In general, R1 is big, and the quantity of radiation that arrives time per unit on the radiation image detector is few, then can not get sufficient concentration.
The factor of influence " uniformity " project is the R1 distance.In general, the words that R1 is too little can not be shone lonizing radiation on whole of radiation image detector, so produce speckle, uniformity reduces.
The factor of influence " distinctiveness ", " graininess " is an amplification, and in general, the big more image of amplification is good more.
The factor of influence " line containing ratio at random " is R2, and in general, R2 is big more, and line at random is removed, and image is good more.
The factor of influence " phase contrast is than effect (edge reinforced effects) " is amplification and R2, and amplification and R2 are big more simultaneously, can access phase contrast more than effect, and it is good that image becomes.
" overall merit " is the visual evaluation result of integral image.
The visual result who estimates, when R1+R2 〉=950 (mm), phase contrast is diagnosis than effect and the evaluation of overall merit both sides gained and allows.As long as promptly confirmed to accomplish R1+R2 〉=950 (mm), and fixedly R1+R2 carries out obtaining diagnosing the image that is allowed in the X-ray imaging apparatus of phase contrast than photography
In the above-mentioned evaluation result, shown the example of focal spot size D=100 (μ m), but as long as D more than 30 (μ m), exceeds 100 (μ m) and also can obtain effect.
(the 2nd embodiment)
Subsequent the 2nd embodiment is explained.Except that the explanation of following record, other parts are identical with the explanation in the 1st embodiment.
Adopt the radiation image detector of 14 * 17 (inches) in the present embodiment.
As the radiation image detector, except the above-mentioned cassette changer of taking in the stimulated Fluoropher thin film, also can adopt for example screen (sensitized paper)/film, FPD (flat panel detector) etc.
Be installed in the subject platform 10 on the support 5, drive correspondingly lifting of photographic attachment body 2 liftings with driving device 17.Like this, can adjust the height of subject platform according to the position (breast position) of subject.Packing into of subject platform 10, and the size that is installed into the subject platform 10 of photographic attachment body 2, detected by the subject platform test section 19 (illustrating among Fig. 3) of obtaining means as subject platform size, this dimension information is output to the control device 16 of body 9.Subject platform test section 19 can adopt microswitch etc.For example as shown in Figure 8, on support 5, establish microswitch 19a, 19b, as subject platform test section 19, subject platform 10 with 18 * 24 (cm) possesses protuberance 10c, and the subject platform 10 of 24 * 30 (cm) does not possess the words of protuberance 10c, microswitch 19a became ON when any one subject platform 10 was loaded onto, only 18 * 24 (cm) when loading onto microswitch 19b become ON.Like this, can detect subject platform 10 pack into and size.Plate for forcing 11 can be along the illustrated back shaft lifting that do not have that is located in the photographic attachment body 2.
Among the ROM of control device 16 shown in Figure 3, remembering the control sequence and the various handling procedure that are used for controlling breast image photographic attachment 1 various piece, CPU is by moving with the association of this control sequence and various handling procedures, control the action of photographic attachment 1 various piece comprehensively, carry out phase contrast than photography.
For example, CPU handles the A program with the Position Control of remembering among the ROM and reads out in RAM, carry out Position Control described later and handle A (with reference to Fig. 9), according to subject platform 10 sizes of packing into, accessory drive 20 moves radiation source 6 and detector support 12, regulates the relative distance with subject platform 10.Then, in case be instructed to photography by input equipment 14a, then carry out photograph processing, apply tube voltage and tube current by 15 pairs of radiation sources 6 of power supply unit, make it to subject H irradiation lonizing radiation, in case reach fixed quantity of radiation being shot in advance from the quantity of radiation of quantity of radiation detecting element 13 inputs, then make radiation source 6 stop radiation exposure by power supply unit 15.
In the 2nd embodiment, any amplification (photography multiplying power) that breast image photographic attachment 1 usefulness is 1.46 times, 1.75 times, 2.63 times is photographed.
Subsequent, the action of the breast image photographic attachment 1 in the 2nd embodiment is explained.
Show the Position Control of carrying out by control device 16 among Fig. 9 and handled A.Following with reference to Fig. 9, control treatment A explains to the position.
Pack in case detect subject platform 10, and subject platform dimension information is transfused to (step S1 by subject platform test section 19; YES), then according to the subject platform dimension information that is transfused to from subject platform test section 19, try to achieve with the subject platform size that is loaded into, can photograph perfectly whole subject H image, promptly by the radiation image of the whole subject H of subject platform 10 supporting, the amplification scope (amplification permissible range) (step S2) that can be detected by radiation image detector by 12 supportings of detector support.
As mentioned above, in the present embodiment, the subject platform is of a size of 18 * 24 (cm) or 24 * 30 (cm).Here because the radiation image detector is 14 * 17 (inches), so, when the subject platform is of a size of 18 * 24 (cm), the words of photographing with 2.65 times amplification, a part that sees through the radiation image of subject platform 10 gamuts is not included the radiation image detector in, so when subject H is put into the situation at subject platform 10 edges greatly, shortcoming will appear in the part of the image of subject H.Therefore, when the subject platform is of a size of 18 * 24 (cm), till the amplification permissible range to 1.75 times.In addition, when the subject platform is of a size of 24 * 30 (cm), the words of photographing with the amplification of 2.65 times or 1.75 times, a part that sees through the radiation image of whole subject platform 10 scopes is not included the radiation image detector in, so, when subject H is put into the situation at subject platform 10 edges greatly, shortcoming will appear in the part of the image of subject H.Therefore, when the subject platform is of a size of 24 * 30 (cm), till the amplification permissible range to 1.46 times.
The amplification permissible range is the amplification that meets the following conditions, that is: the longitudinal size of the longitudinal size * amplification of subject platform 10≤radiation image detector, and: the lateral dimension of the lateral dimension * amplification of subject platform 10≤radiation image detector.It can be calculated when every implementation Position Control is handled A and try to achieve decision, also can be with the table after subject platform dimension information and the amplification correspondence, and memory is tried to achieve with reference to this table in memory means such as ROM.
Subsequent, the position of the position of subject platform 10 and plate for forcing 11 is adjusted, and the position of subject platform 10 and plate for forcing 11 is set (step S3).Specific as follows, by operator's input device 14a such as photography technicians, in case comprising the photography conditions of photography direction is transfused to, judge then whether the photography direction that is transfused to needs the photography direction of photographic attachment body 2 rotations, be when needing the photography direction of rotation, for example, when the loxosis direction is taken the MLO (Medio-Lateral Oblique) of breast, driving device 17 is controlled, and it is a certain amount of to drive the 2 whole rotations of photographic attachment body.In case the position of input equipment 14a is adjusted switch and is operated, then corresponding with the operation of position adjustment switch, driving device 17 is controlled, adjusts the position of subject platform 10.In addition, adjust the position of plate for forcing 11 by operator such as photography technician etc., subject H is oppressed fixing.After the adjustment, by input equipment 14a, input indication is set thus and is finished to the set positions subject platform of having adjusted 10 and the order of plate for forcing 11.
In case set the position of subject platform 10 and plate for forcing 11, driving device 20 is controlled, regulate the relative position of subject platform 10 relative radiation sources 6 and radiation image detector, make amplification in the amplification permissible range that step S2 tries to achieve (step S4).For example, the amplification of pre-set acquiescence, if the acquiescence amplification in the amplification permissible range, then according to the acquiescence amplification, the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector is calculated respectively.Then, driving device 20 is controlled, driving support component 8 moves to subject platform 10 and is respectively the position of calculating distance from the distance of radiation source 6 and radiation image detector, regulates the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector.When the amplification of acquiescence surpassed the amplification permissible range, according to the maximum amplification in the amplification permissible range, the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector was calculated respectively.Then, driving device 20 is controlled, driving support component 8 moves to subject platform 10 and is respectively the position of calculating distance from the distance of radiation source 6 and radiation image detector, regulates the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector.
Above-mentioned Position Control is handled A and is finished, in case the photography indication is transfused to, then carries out photograph processing, by power supply unit 15, radiation source 6 is applied tube voltage and tube current, to subject H irradiation lonizing radiation, photographs.
As above illustration, breast image photographic attachment 1 according to the 2nd embodiment, because scope according to the subject platform size decision amplification of being loaded onto, photograph with the amplification in this scope then, so can prevent the shortcoming of image with subject integral body as camera coverage.
In addition, in above-mentioned the 2nd embodiment, the size of radiation image detector has only a kind of 14 * 17 (inch), but also can constitute the structure of the radiation image detector of size more than 2 kinds of can packing into.At this moment, obtain means as the detector size, can adopt the pick off that detects the detector size with the infrared ray Exposure Metering, the size of the radiation image detector that will pack into outputs to control device 16, also can on the certain position of radiation image detector, establish the coding of expression detector size, simultaneously at detector support 12, on the relative position of the coding that is provided with the radiation image detector when radiation image detector is loaded into, if code reader, when the radiation image detector is loaded into detector support 12, read the detector size of the radiation image detector that is loaded into by code reader, the dimension information with detector outputs to control device 16 then.When carrying out Position Control processing A in the control device 16, as long as, calculate the amplification permissible range and get final product according to the subject platform dimension information and the detector dimension information that are transfused to.
(the 3rd embodiment)
Subsequent the 3rd embodiment is explained.The structure of the 3rd embodiment is slightly identical with the structure of the 2nd embodiment, so omit explanation, the action of the 3rd embodiment is described.
Show the Position Control treatments B of carrying out by control device 16 among Figure 10.Following with reference to Figure 10, control treatment B explains to the position.
Pack in case detect subject platform 10, and subject platform dimension information is transfused to (step S11 by subject platform test section 19; YES), then according to the subject platform dimension information that is transfused to from subject platform test section 19, try to achieve with the subject platform size that is loaded into, can photograph perfectly whole subject H image, promptly by the radiation image of the whole subject H of subject platform 10 supporting, the amplification scope (amplification permissible range) (step S12) that can be detected by radiation image detector by 12 supportings of detector support.
As mentioned above, in the present embodiment, the subject platform is of a size of 18 * 24 (cm) or 24 * 30 (cm).Here because the radiation image detector is 14 * 17 (inches), so, when the subject platform is of a size of 18 * 24 (cm), the words of photographing with 2.65 times amplification, a part that sees through the radiation image of whole subject platform 10 scopes is not included the radiation image detector in, so when subject H is put into the situation at subject platform 10 edges greatly, shortcoming will appear in the part of the image of subject H.Therefore, when the subject platform is of a size of 18 * 24 (cm), till the amplification permissible range to 1.75 times.In addition, when the subject platform is of a size of 24 * 30 (cm), the words of photographing with the amplification of 2.65 times or 1.75 times, a part that sees through the radiation image of whole subject platform 10 scopes is not included the radiation image detector in, so, when subject H is put into the situation at subject platform 10 edges greatly, shortcoming will appear in the part of the image of subject H.Therefore, when the subject platform is of a size of 24 * 30 (cm), till the amplification permissible range to 1.46 times.
The amplification permissible range, it is the amplification that meets the following conditions, that is: the longitudinal size of the longitudinal size * amplification of subject platform 10≤radiation image detector, and: the lateral dimension of the lateral dimension * amplification of subject platform 10≤radiation image detector.It can be calculated when every Position Control is handled and try to achieve decision, also can be with the table after subject platform dimension information and the amplification correspondence, and memory is tried to achieve with reference to this table in memory means such as ROM.
Subsequent, the position of the position of subject platform 10 and plate for forcing 11 is adjusted, and the position of subject platform 10 and plate for forcing 11 is set (step S13).Specific as follows, by operator's input device 14a such as photography technicians, in case input comprises the photography conditions of photography direction, judge then whether the photography direction that is transfused to needs the photography direction of photographic attachment body 2 rotations, be when needing the photography direction of rotation, for example, when the loxosis direction is taken the MLO (Medio-Lateral Oblique) of breast, driving device 17 is controlled, and it is a certain amount of to drive the 2 whole rotations of photographic attachment body.In case the position of input equipment 14a is adjusted switch and is operated, then corresponding with the operation of position adjustment switch, driving device 17 is controlled, adjusts the position of subject platform 10.In addition, adjust the position of plate for forcing 11 by operator such as photography technician etc., subject H is oppressed fixing.After the adjustment, by input equipment 14a, input indication is set thus and is finished to the set positions subject platform of having adjusted 10 and the order of plate for forcing 11.
After setting the position of subject platform 10 and plate for forcing 11, in case set input amplification (photography multiplying power) (step S14) by input equipment 14a, then whether the amplification that is set of judgement is in the amplification permissible range that step S12 tries to achieve (step S15).(step S15 when the amplification of setting surpasses the amplification permissible range; NO), the amplification of setting surpasses the amplification permissible range, the part of subject H image is not included the radiation image detector in, warns image the warning picture of shortcoming to occur to the operator, is presented at and the display device 14b (step S16) of means by way of caution.When the operator wishes just to photograph with the amplification of this setting, can adjust the position of subject H, so that make the image of subject region-of-interest to enter in the detector.In addition, show among the display device 14b that being used for specifying is just to photograph with the amplification of this setting, still set the affirmation picture of the order of amplification once more, disapprove signal (step S17 in case import photography thus by confirm the picture appointment to set amplification once more from this order; STOP), step S14 is then got back in processing.(step S15 when amplification is in the photography permissible range; YES), (step S17 during input photography enabling signal thus or by confirm picture to specify photography to continue from order; GO), according to the photography multiplying power of setting, calculate the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector respectively.Then, driving device 20 is controlled, driving support component 8 thus moves to subject platform 10 and is respectively the position of calculating distance from the distance of radiation source 6 and radiation image detector, regulate the relative distance (step S18) of subject platform 10 relative radiation sources 6 and radiation image detector, this processing finishes.
Above-mentioned Position Control treatments B finishes, in case the photography indication is transfused to, then carries out photograph processing, by power supply unit 15, radiation source 6 is applied tube voltage and tube current, to subject H irradiation lonizing radiation, photographs.
As above illustration, breast image photographic attachment 1 according to the 3rd embodiment, because dimension information according to the subject platform of being loaded onto, try to achieve the amplification scope that to take subject H image perfectly, when the amplification of setting is not in this scope, the warning of the display image shortcoming meaning is given the chance of setting once more with the operator, so can prevent the shortcoming of image.And when the operator thinks preferential amplification, also can just photograph with the amplification of this setting.At this moment, show that by warning the operator can adjust subject, so that make the image of region-of-interest enter in the detector, so can prevent the image shortcoming of subject region-of-interest.
In addition, in above-mentioned the 2nd embodiment, the size of radiation image detector has only a kind of 14 * 17 (inch), but also can constitute the structure of the radiation image detector of size more than 2 kinds of can packing into.At this moment, obtain means as the detector size, can adopt the pick off that detects the detector size with the infrared ray Exposure Metering, the size of the radiation image detector that will pack into outputs to control device 16, also can on the certain position of radiation image detector, establish the coding of expression detector size, simultaneously at detector support 12, on the relative position of the coding that is provided with the radiation image detector when radiation image detector is loaded into, if code reader, when the radiation image detector is loaded into detector support 12, read the detector size of the radiation image detector that is loaded into by code reader, the dimension information with detector outputs to control device 16 then.When carrying out Position Control processing A in the control device 16, as long as, calculate the amplification permissible range and get final product according to the subject platform dimension information and the detector dimension information that are transfused to.
(the 4th embodiment)
Subsequent the 4th embodiment is explained.The 4th embodiment is in the aforementioned the 1st～3 embodiment, and this spatial lonizing radiation curtain-shaped cover member of covering is established in the space between subject platform 10 and detector support 12.Except that the explanation of following record, other explanations with the aforementioned the 1st～3 embodiment are identical.
The configuration example of having shown the breast image photographic attachment 1 in the 4th embodiment among Figure 11 and Figure 12.Figure 11 is the outward appearance configuration example sketch map of installing in breast image photographic attachment 1 shown in Figure 1 behind the 1st lonizing radiation curtain-shaped cover member 22, and Figure 12 is the outward appearance configuration example sketch map of installing in breast image photographic attachment 1 shown in Figure 1 behind the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23.
Aforementioned lonizing radiation curtain-shaped cover member is formed by lead or lead glass.In addition, in order to improve intensity, can also be resin and plumbous plywood, or metallic plate and plumbous plywood such as ferrum, rustless steel.
In the 4th embodiment, in the breast image photographic attachment 1, according to amplification, the 1st lonizing radiation curtain-shaped cover member 22 with and/or the 2nd lonizing radiation curtain-shaped cover member 23 can pack into/shirk.
Below, with reference to Figure 13～Figure 15, the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23 are explained.
Figure 13 is the pattern diagram of subject platform 10, detector support 12 and the 1st lonizing radiation curtain-shaped cover member 22.As shown in figure 13, the 1st lonizing radiation curtain-shaped cover member 22 can be packed into/shirk in detector support 12, (the 1st photography multiplying power of minimum amplification in the breast image photographic attachment 1, here be 1.46 times) when setting, in order to cover the space between subject platform 10 and the detector support 12, make the 1st lonizing radiation curtain-shaped cover member 22 height h1, width w1, depth w2. Screw cave 22a, 22b are arranged on the 1st lonizing radiation curtain-shaped cover member 22, make screw cave 22a aim at the screw cave 12a that detector support 12 is provided with, and make screw cave 22b aim at screw cave 12b (diagram is omitted), insert screw respectively, can be fixed on the detector support 12 thus.The 1st lonizing radiation curtain-shaped cover member 22 is installed on the detector support 12, the radiation source 6 when adjusting is photographed with minimum amplification and the relative distance of radiation image detector and subject platform 10, then breast image photographic attachment 1 is a state shown in Figure 11.
Breast image photographic attachment 1 is to carry out the device of phase contrast than photography, during any one amplification, all must load onto the 1st lonizing radiation curtain-shaped cover member 22, so the 1st lonizing radiation curtain-shaped cover member 22 is the states that are installed on the breast image photographic attachment 1 always.When absorbing phase contrast, take away the 1st lonizing radiation curtain-shaped cover member 22, just can carry out its photography than photography.
In addition, when the 1st lonizing radiation curtain-shaped cover member 22 installs on the detector support 12, on the position corresponding, formed peristome 22c with mouthful 12c that packs into/shirk of detector support 12.By this peristome 22c, can be under the state of loading onto the 1st lonizing radiation curtain-shaped cover member 22, pack into or take out the radiation image detector from mouthful 12c that packs into/shirk of detector supporting part 12.
Figure 14 (a) is the subject platform 10 seen from the side and the ideograph of the 2nd lonizing radiation curtain-shaped cover member 23, Figure 14 (b) is the ideograph of the 2nd lonizing radiation curtain-shaped cover member 23 seen from above, Figure 15 (a) is the ideograph of seeing from the side under the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23 states loaded onto, and Figure 15 (b) is the ideograph of seeing from the front under the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23 states loaded onto.The 2nd lonizing radiation curtain-shaped cover member 23 is the parts that are contained on the subject platform 10, as Figure 14 (a) (b) shown in, what its end by subject platform 10 1 sides was provided with the cross section hook-shaped is to close protuberance 23c, its can with subject platform 10 be to close recess 10c system to close, on the position that overlaps with subject platform 10 when installing to subject platform 10, be provided with Magnet 23a, 23b as fixed part.By make the 2nd lonizing radiation curtain-shaped cover member 23 be close protuberance 23c system close in subject platform 10 be to close recess 10c, Magnet 23a, 23b hold magnetic metallic plate 10a, the 10b of subject platform 10.Be to close protuberance 23c by this and be that what close recess 10c is to close, and the holding of Magnet 23a and magnetic metallic plate 10a, Magnet 23b and magnetic metallic plate 10b, the 2nd lonizing radiation curtain-shaped cover member 23 can be fixed on the subject platform 10.
The 2nd lonizing radiation curtain-shaped cover member 23 is set at amplification greater than the 1st photography multiplying power, it is the amplification (the 2nd photography multiplying power) of minimum amplification, this moment, subject platform 10 was compared during with minimum amplification elongated with the distance between the detector support 12, the space appears between subject platform 10 and the 1st lonizing radiation curtain-shaped cover member 22, the 2nd lonizing radiation curtain-shaped cover member 23 is the spatial parts that are used to cover this appearance, according to amplification (being that corresponding amplification is 1.76 times or 2.63 times here), in order to cover the space between subject platform 10 and the 1st lonizing radiation curtain-shaped cover member 22, make its height h2.When a plurality of photographies greater than minimum amplification may amplification, can prepare the 2nd lonizing radiation curtain-shaped cover member 23 according to each amplification, also can prepare the 2nd lonizing radiation curtain-shaped cover member 23, make the possible maximum amplification of its height held and photography corresponding.When being used for amplification greater than the photography of minimum amplification, regulate the relative distance of subject platform 10 and radiation source 6 and detector support 12, after loading onto the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23, breast image photographic attachment 1 is whole to be state as shown in figure 12.
After loading onto the 1st lonizing radiation curtain-shaped cover member 22 and the 2nd lonizing radiation curtain-shaped cover member 23, shown in Figure 15 (b), also can pass through peristome 22c, pack into or take out the radiation image detector from mouthful 12c that packs into/shirk of detector support 12.
According to said structure, during the photography of phase contrast ratio, operators such as photography technician install to the radiation image detector on the detector support 12 from the peristome 22c of the 1st lonizing radiation curtain-shaped cover member 22, in case carrying out the position of input equipment 14a, the operator adjusts the operation of switch and the input of photography direction, then corresponding with operator's operation, control device 16 accessory drives 17, subject platform 10 are adjusted to and subject H height and the corresponding position of photography direction.Behind the subject H location, if the operator is from input equipment 14a input amplification, set the position of plate for forcing 11, control device 16 accessory drives 20 then, according to amplification support component 8 is moved, thus, when the relative distance that keeps 12 of radiation source 6 and detector supports is certain, regulate the relative distance of subject platform 10 relative radiation sources 6 and radiation image detector.Then, according to amplification if necessary, the operator installs and corresponding the 2nd lonizing radiation curtain-shaped cover member 23 of amplification, by the input equipment 14a indication of photographing.When the 2nd lonizing radiation curtain-shaped cover member 23 is installed, be that what close that protuberance 23c system is incorporated into subject platform 10 is to close recess 10c as long as the operator makes the 2nd lonizing radiation curtain-shaped cover member 23.In case be instructed to photography, then photograph by control device 16.During photography, by lonizing radiation curtain-shaped cover member 22 with and/or lonizing radiation curtain-shaped cover member 23, can prevent to enter in the radiation exposure zone of 12 of subject platform 10 and detector supports from the outside, like this, can prevent the photograph first-class phenomenon of image that arrives illuminated and being shot at the position beyond the position of patient.
As mentioned above, according to breast image photographic attachment 1, by the lonizing radiation curtain-shaped cover member is constituted, have the 1st general lonizing radiation curtain-shaped cover member of peristome 22c and all amplifications and, the 2nd lonizing radiation curtain-shaped cover member that corresponding amplification can be packed into/be shirked, can be contained under the state of breast image photographic attachment 1 at the 1st all necessary lonizing radiation curtain-shaped cover member 22 of any amplification, easily carry out to the packing into and pack into of the radiation image detector of detector support 12/shirk at this point, can improve when using the lonizing radiation curtain-shaped cover member easiness of packing into/shirk of radiation image detector.
More than the breast image photographic attachment 1 in the 1st～4 the embodiment is illustrated, still, the content of recording and narrating in the respective embodiments described above is one of the breast image photographic attachment 1 that a present invention relates to example preferably, the present invention is not limited thereto.In addition, the thin portion structure of relevant breast image photographic attachment 1 and the action of thin portion in the scope of the aim of the present invention of not overflowing, also can have suitable change.
Claims (11)
1. X-ray imaging apparatus comprises: radiation source, and focal spot size D is more than 30 (μ m); Detector supporting means, supporting radiation image detector, it detects the lonizing radiation from described radiation source ejaculation through subject; The subject platform is arranged between described radiation source and the described detector supporting means, is used for fixing subject; Wherein, be that R1 〉=(D-7)/200 (m) carries out phase contrast than photography with described radiation source to the distance R 1 of described subject, X-ray imaging apparatus is characterised in that, has:
The maintenance means, it is certain being used for keeping the distance between described radiation source and the described detector supporting means;
Regulating measure, the relative distance of regulating described relatively radiation source of described subject platform and described radiation image detector.
2. the X-ray imaging apparatus of record in the claim 1 is characterized in that the distance L (m) between described radiation source and the described detector supporting means is more than 0.95 (m).
3. the X-ray imaging apparatus of record in the claim 2 is characterized in that focal spot size D=100 (μ m).
4. the X-ray imaging apparatus of putting down in writing in any one of claim 1 to 3 is characterized in that,
Described subject platform is installed after can selecting from multiple different size,
And have: subject platform dimension information is obtained means, obtains the dimension information of the described subject platform of being loaded onto; Control device according to the described subject platform dimension information of being obtained, is controlled described regulating measure.
In the claim 4 record X-ray imaging apparatus, it is characterized in that, described control device is according to the described subject platform dimension information of being obtained, described regulating measure is adjusted to described relative distance, make the radiation image of the subject integral body that is placed on the subject platform, can be by the distance that is detected by the radiation image detector of described detector supporting means supporting.
6. the X-ray imaging apparatus of record in the claim 4 or 5 is characterized in that,
And have the detector size and obtain means, it obtains the dimension information of described radiation image detector,
Described control device is controlled described regulating measure according to the dimension information of described subject platform dimension information of being obtained and the described radiation image detector of being obtained.
7. the X-ray imaging apparatus of putting down in writing in any one of claim 4 to 6 is characterized in that, and has:
The setting means are set the photography multiplying power;
Control device, it is according to described subject platform dimension information of being obtained and the described photography multiplying power that is set, when judgement is photographed with the described photography multiplying power that is set, place the radiation image of the subject integral body on the described subject platform, can be by being detected by the radiation image detector of described detector supporting means supporting, according to described judged result, control described regulating measure.
8. the X-ray imaging apparatus of record in the claim 7 is characterized in that,
And have the warning means that give a warning,
When described control device is judged, when photographing with the described photography multiplying power that is set, when placing the part of the radiation image of the subject on the described subject platform not detect by described radiation image detector, described warning means are given a warning, when the photography enabling signal with the described photography multiplying power that is set is transfused to, according to the described photography multiplying power that is set, control described regulating measure, make it regulate described relative distance.
9. the X-ray imaging apparatus of record in the claim 7 or 8 is characterized in that,
Described control device is according to the dimension information of described subject platform dimension information of being obtained and the described radiation image detector of being obtained, when judgement is photographed with the described photography multiplying power that is set, place the radiation image of the subject integral body on the described subject platform, can be by being detected by the radiation image detector of described detector supporting means supporting.
10. the X-ray imaging apparatus of putting down in writing in any one of claim 1 to 9 is characterized in that,
Described detector supporting means have the mouth of packing into/shirk of the described radiation image detector of packing into/shirk,
Be provided with the lonizing radiation curtain-shaped cover member, it covers the space between described subject platform and the described detector supporting means, this lonizing radiation curtain-shaped cover member with described detector supporting means on mouthful corresponding position of packing into/shirk on, formed the peristome that the radiation image detector can pass through.
11. the X-ray imaging apparatus of record in the claim 10, it is characterized in that, described lonizing radiation curtain-shaped cover member comprises: the 1st lonizing radiation curtain-shaped cover member, and when it covers the photography of the 1st photography multiplying power, the space between described subject platform and the described detector supporting means; The 2nd lonizing radiation curtain-shaped cover member, when it covers the photography of the 2nd photography multiplying power when described subject platform is relative with the distance between the described detector supporting means photographs greater than described the 1st photography multiplying power, the space that occurs between described the 1st lonizing radiation curtain-shaped cover member and the described subject platform; Described peristome is formed on described the 1st lonizing radiation curtain-shaped cover member.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297431/2005 | 2005-10-12 | ||
| JP2005297431A JP2007105146A (en) | 2005-10-12 | 2005-10-12 | Radiographic imaging equipment |
| JP298613/2005 | 2005-10-13 | ||
| JP323477/2005 | 2005-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101282689A true CN101282689A (en) | 2008-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200680037493XA Pending CN101282689A (en) | 2005-10-12 | 2006-09-26 | Radiographic imager |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007105146A (en) |
| CN (1) | CN101282689A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142522A (en) * | 2013-04-25 | 2015-12-09 | 株式会社岛津制作所 | Mobile-type radiographic image pickup device |
| CN105726051A (en) * | 2016-04-26 | 2016-07-06 | 深圳安科高技术股份有限公司 | Mammary gland magnification radiographic apparatus |
| CN107997775A (en) * | 2018-01-17 | 2018-05-08 | 江苏美伦影像系统有限公司 | A kind of adjustable mammary gland X ray photographing systems of FOV |
| CN113925521A (en) * | 2021-09-15 | 2022-01-14 | 深圳圣诺医疗设备股份有限公司 | Ball tube assembly lifting control device and X-ray emission focal point self-adaption system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005080736A (en) * | 2003-09-05 | 2005-03-31 | Konica Minolta Medical & Graphic Inc | Mamma imaging apparatus |
| JP2004229899A (en) * | 2003-01-30 | 2004-08-19 | Konica Minolta Holdings Inc | Mammographic apparatus |
| JP2004248699A (en) * | 2003-02-18 | 2004-09-09 | Konica Minolta Holdings Inc | X-ray imaging method and x-ray imaging system |
-
2005
- 2005-10-12 JP JP2005297431A patent/JP2007105146A/en active Pending
-
2006
- 2006-09-26 CN CNA200680037493XA patent/CN101282689A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142522A (en) * | 2013-04-25 | 2015-12-09 | 株式会社岛津制作所 | Mobile-type radiographic image pickup device |
| CN105726051A (en) * | 2016-04-26 | 2016-07-06 | 深圳安科高技术股份有限公司 | Mammary gland magnification radiographic apparatus |
| CN107997775A (en) * | 2018-01-17 | 2018-05-08 | 江苏美伦影像系统有限公司 | A kind of adjustable mammary gland X ray photographing systems of FOV |
| CN113925521A (en) * | 2021-09-15 | 2022-01-14 | 深圳圣诺医疗设备股份有限公司 | Ball tube assembly lifting control device and X-ray emission focal point self-adaption system |
| CN113925521B (en) * | 2021-09-15 | 2023-10-03 | 深圳圣诺医疗设备股份有限公司 | Bulb assembly lifting control device and X-ray emission focus self-adaptive system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007105146A (en) | 2007-04-26 |
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