CN102949193A - Fluoroscopy equipment and method for reducing fluoroscopy dosage - Google Patents
Fluoroscopy equipment and method for reducing fluoroscopy dosage Download PDFInfo
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- CN102949193A CN102949193A CN2011102411993A CN201110241199A CN102949193A CN 102949193 A CN102949193 A CN 102949193A CN 2011102411993 A CN2011102411993 A CN 2011102411993A CN 201110241199 A CN201110241199 A CN 201110241199A CN 102949193 A CN102949193 A CN 102949193A
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Abstract
The invention relates to a method for reducing fluoroscopy dosage. Initial dosage is set according to body type of an examinee and enabled to be closer to target dosage. The method includes steps of measuring thickness of the examinee; determining the initial fluoroscopy dosage of the examinee according to a fluoroscopy dosage-examinee thickness relation; emitting X-rays for examining the examinee according to the initial fluoroscopy dosage; and adjusting the fluoroscopy dosage according to acquired examinee images, and examining the examinee again until acceptable examinee images are obtained.
Description
Technical field
The present invention relates to fluoroscopy equipment, especially relate to a kind of method that reduces fluoroscopy dosage.
Background technology
Fluoroscopy (fluoroscopy) obtains the XRF image by the x-ray bombardment human body.Based on the requirement of image viewing or post processing, need the dosage of calibration X ray, make image reach best or more excellent brightness.For instance, when initial given dosage was higher, the brightness of image that obtains may be too high, therefore with the dosage downward modulation, with the convergence target dose.On the contrary, when initial given dosage was low, the brightness of image that obtains may be too low, therefore dosage raised, with the convergence target dose.
Yet in the process of Dose Calibration, human body unnecessarily is subject to the radiation of X ray.Therefore, the Dose Calibration that is desirably in X ray is before the target dose, and the radiation that human body is subject to is the least possible.
Summary of the invention
At present, the predose setting of fluoroscopy and person under inspection are individual irrelevant, that is to say, all persons under inspection use fixing predose, the dosage that once checks before perhaps.Yet the X ray predose that thinner person under inspection is subject to may be higher than its required dosage, and more fat person under inspection may begin with lower dosage, thereby is subject to unnecessary additional radiation before reaching target dose.
Given this, technical problem to be solved by this invention provides a kind of method that reduces fluoroscopy dosage, can predose be set according to person under inspection's build, makes it more near target dose.
The present invention is that to solve the problems of the technologies described above the technical scheme that adopts be to propose a kind of method that reduces fluoroscopy dosage, is applicable to a fluoroscopy equipment, and the method may further comprise the steps: the thickness of measuring the person under inspection; According to inspection dosage-person under inspection's thickness relationship curve, determine this person under inspection's initial inspection dosage; According to this initial inspection dosage emission X ray, the person under inspection is checked; And according to the person under inspection's image that obtains, adjust and check dosage, the person under inspection is checked again, until obtain acceptable person under inspection's image.
In one embodiment of this invention, said method also is included in pre-configured this inspection dosage-person under inspection's thickness relationship curve in this fluoroscopy equipment.
In one embodiment of this invention, said method also is included in this fluoroscopy equipment and uses the initial stage, by the human sample inspection of predetermined quantity, sets up this inspection dosage-person under inspection's thickness relationship curve.
In one embodiment of this invention, the step of setting up this inspection dosage-person under inspection's thickness relationship curve comprises: the human sample to predetermined quantity carries out fluoroscopy; A series of target doses of preservation fluoroscopy-person under inspection's thickness data; And this series target dose-person under inspection's thickness data carried out match, to obtain this inspection dosage-person under inspection's thickness relationship curve.
In one embodiment of this invention, the step of setting up this inspection dosage-person under inspection's thickness relationship curve also comprises: this inspection dosage-person under inspection's thickness relationship curve is carried out segmentation; Calculate in each segmentation the average criterion dosage under between person under inspection's caliper zones.
The present invention also proposes a kind of fluoroscopy equipment, comprises thickness detector, thickness detector, X-ray producer, picture receiver and aligner.Thickness detector is measured person under inspection's thickness in order to before beginning inspection.X-ray producer checks dosage-person under inspection's thickness relationship curve in order to the thickness and one according to this person under inspection, determines the initial inspection dosage of X ray, and adjusts this initial inspection dosage according to a feedback signal.Picture receiver receives X ray and passes the image that produces behind the person under inspection.Aligner provides this X-ray producer that feeds back signal to of dose titration according to the quality of this image.
In one embodiment of this invention, pre-configured being somebody's turn to do checks dosage-person under inspection's thickness relationship curve in this fluoroscopy equipment.
In one embodiment of this invention, this fluoroscopy equipment by the human sample inspection of predetermined quantity, is set up this inspection dosage-person under inspection's thickness relationship curve at the use initial stage.
The present invention is owing to adopting above technical scheme, check dosage-person under inspection's thickness relationship by introducing, so that the more approaching target dose that can obtain to receive image of initial inspection dosage before each fluoroscopy, thereby reduced the X-radiation dosage that the person under inspection is subject to.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates according to an embodiment of the invention fluoroscopy device structure.
Fig. 2 illustrates according to an embodiment of the invention person under inspection's thickness measure schematic diagram.
Fig. 3 illustrates according to an embodiment of the invention x-ray dose calibration schematic diagram.
Fig. 4 illustrates according to an embodiment of the invention KV/mA-thickness curve Establishing process figure.
Fig. 5 illustrates according to an embodiment of the invention x-ray dose calibration flow chart.
Fig. 6 A, 6B illustrate respectively according to an embodiment of the invention KV-thickness, mA-thickness dosage matched curve schematic diagram.
The specific embodiment
Fig. 1 illustrates the fluoroscopy device structure, as exemplary implementation environment of the present invention.With reference to shown in Figure 1, fluoroscopy equipment 100 comprises X-ray producer 102, X-ray tube 104, pointing instrumentation 106, is examined platform 108, picture receiver 110 and aligner 112.
X-ray producer 102 can provide the X ray predose to X-ray tube 104.At this, exemplarily use KV/mA (being the long-pending of voltage and current) to weigh the inspection dosage of X ray.Below, will represent with the KV/mA value inspection dosage of X ray.X-ray tube 104 emission X ray see through pointing instrumentation 106 and person under inspection 10, arrive picture receiver 110.According to the picture quality that receives, aligner 112 produces feedback signal and offers X-ray producer 102.X-ray producer 102 is calibrated the x-ray dose of weighing with KV/mA according to feedback signal.
Above-mentioned calibration flow process can circulate, until x-ray dose reaches target dose.
In different application, the calibration flow process may be carried out Dose Calibration with different KV/mA data sets.Each KV/mA data set can form curve as shown in Figure 3, and in curve, abscissa is electric current (mA of unit), and vertical coordinate is voltage (unit K V).The increase of electric current or voltage or to reduce be to carry out along curve.Suppose that the O point is target KV/mA point, when initial KV/mA point during for the A point, the feedback signal of aligner 112 can show that current KV/mA surpasses desired value, and Dose Calibration can be towards the Dir2 direction; Otherwise when initial KV/mA point during for the B point, the feedback signal of aligner 112 can show current KV/mA less than desired value, and Dose Calibration can be towards the Dir1 direction.Desired value is that equipment reaches the required value of acceptable picture quality.
Therefore initial KV/mA is more near desired value, and the time that equipment is calibrated is shorter, thereby the unnecessary dosage that imposes on the person under inspection is fewer.
Consider the relation of person under inspection's build and required x-ray dose (weighing with KV/mA in the present embodiment), can test by multisample, set up in advance the corresponding relation between x-ray dose and the buman body type.For example, represent build with the thickness of human body, in fluoroscopy equipment, set up KV-thickness curve and mA-thickness curve.Then, when checking the person under inspection, measure person under inspection's thickness, determine accordingly initial KV/mA.
Fig. 2 illustrates according to an embodiment of the invention person under inspection's thickness measure schematic diagram.With reference to shown in Figure 2, at pointing instrumentation 106 thickness detector 107 is installed.After equipment 100 designs are finished, SID (Source Image Distance, the source images distance) be known, examined the distance D 2 between platform 108 surfaces and picture receiver 110 surfaces, thickness and the D3 of X-ray tube 104 and pointing instrumentation 106, and the thickness of thickness detector 107 is fixed values, and thickness detector 107 can detect by thickness detector 107 to the distance D 4 on person under inspection 10 surfaces and obtain.Thereby person under inspection's thickness D1 can calculate by following formula:
D1＝SID-D2-D3-D4-D5
The structure that should be pointed out that fluoroscopy equipment 100 is diversified, so the mode that person under inspection's thickness detects is not limited to above-described mode.When implementing, those skilled in the art should have the ability to construct to arrange thickness detector and measure person under inspection's thickness according to concrete fluoroscopy equipment.
Fig. 4 illustrates according to an embodiment of the invention KV-thickness curve, mA-thickness curve Establishing process figure.With reference to shown in Figure 4, in the circulation of step S11-S13, fluoroscopy equipment 100 carries out the multisample inspection.This process can be carried out at the 100 use initial stages of fluoroscopy equipment.At step S11, person under inspection's individuality is carried out fluoroscopy, in checking process, fluoroscopy equipment 100 can 107 detections of used thickness detector obtain person under inspection's thickness.Simultaneously, but equipment 100 can record obtain acceptance pattern as the time corresponding target KV/mA value.At step S12, equipment 100 can be preserved target KV-person under inspection's thickness and target mA-person under inspection thickness data.At step S13, if judgment device is finished the specimen inspection of some, then enter step S14.Otherwise return step S11.
At step S14, according to existing target KV-person under inspection thickness data and target mA-person under inspection thickness data match target KV-person under inspection's thickness curve and target mA-person under inspection thickness curve.Fig. 6 A illustrates exemplary target KV-person under inspection thickness curve, and Fig. 6 B illustrates exemplary target mA-person under inspection thickness curve.In one embodiment, can use these targets KV-person under inspection's thickness curve and mA-person under inspection thickness curve, determine target KV/mA value according to the person under inspection's thickness that detects.Yet, consider that the one-to-one relationship of target KV/mA-person under inspection thickness is not very accurate, in the embodiment shown in fig. 4, preferably at step S15 curve is carried out segmentation, the quantity of segmentation does not limit.At step S16, can between the person under inspection's caliper zones in each section curve, calculate respectively average criterion KV/mA value.When fluoroscopy, when person under inspection's thickness falls into a certain interval, select corresponding this interval target KV/mA value as initial KV/mA value.This improved mode is actually smoothed curve is become the staged curve.
Like this, the person under inspection of build thinner (thickness is also less) is when being checked, will obtain lower initial KV/mA value, and build more fat (thickness is also larger)) person under inspection is when being checked, because they and target dose approach, and can effectively reduce useless roentgendosis.Take curve shown in Figure 3 as example, these initial KV/mA values can be more near target KV/mA value O.
In one embodiment, fluoroscopy equipment, for example configurable default KV-thickness curve and mA-thickness curve in the generator 102 when each the inspection, use this curve to determine initial KV/mA value, then by calibration convergence target KV/mA value.
In another embodiment, fluoroscopy equipment does not have pre-configured KV-thickness curve and mA-thickness curve, but by process shown in Figure 4, the oneself sets up KV-thickness curve and mA-thickness curve gradually.
No matter whether configure KV-thickness curve and mA-thickness curve, fluoroscopy equipment all can be configured to has the ability of coming fair curve by follow-up sample collection.
Fig. 5 illustrates according to an embodiment of the invention x-ray dose calibration flow chart.Referring to Fig. 1, Fig. 2 and this flow process of description shown in Figure 5, at step S21, fluoroscopy equipment 100 checks person under inspection's thickness by thickness detector 107.Then, in generator 102, according to KV-thickness curve and mA-thickness curve, or according to the average criterion KV/mA under the different-thickness interval of this curve calculation, determine an initial KV/mA value.At step S23, fluoroscopy equipment 100 utilizes this KV/mA value to determine initial x-ray dose, from X-ray tube 104 emission X ray, begins the person under inspection is checked, picture receiver 110 will form the image at person under inspection's raying position.At step S24, if aligner 112 think that the picture quality that obtains is better or can accept, then directly enter step S26, otherwise at step S25, aligner 112 provides and feeds back signal to generator 102, adjusts the KV/mA value by the latter, then returns step S24.
Be appreciated that, the initial KV/mA value of determining according to the KV/mA-thickness curve may not be exactly the current specific target KV/mA value of being examined individuality, but this initial KV/mA will be than the situation of not using the KV/mA-thickness curve this target of convergence KV/mA value more, thereby reduces the unnecessary x-ray dose that the person under inspection is applied.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (8)
1. a method that reduces fluoroscopy dosage is applicable to a fluoroscopy equipment, and the method may further comprise the steps:
Measure person under inspection's thickness;
According to inspection dosage-person under inspection's thickness relationship curve, determine this person under inspection's initial inspection dosage;
According to this initial inspection dosage emission X ray, the person under inspection is checked; And
According to the person under inspection's image that obtains, adjust and check dosage, the person under inspection is checked again, until obtain acceptable person under inspection's image.
2. the method for claim 1 is characterized in that, also is included in pre-configured this inspection dosage-person under inspection's thickness relationship curve in this fluoroscopy equipment.
3. the method for claim 1 is characterized in that, also is included in this fluoroscopy equipment and uses the initial stage, by the human sample inspection of predetermined quantity, sets up this inspection dosage-person under inspection's thickness relationship curve.
4. method as claimed in claim 2 is characterized in that, the step of setting up this inspection dosage-person under inspection's thickness relationship curve comprises:
Human sample to predetermined quantity carries out fluoroscopy;
A series of target doses of preservation fluoroscopy-person under inspection's thickness data; And
This series target dose-person under inspection's thickness data is carried out match, to obtain this inspection dosage-person under inspection's thickness relationship curve.
5. method as claimed in claim 4 is characterized in that, the step of setting up this inspection dosage-person under inspection's thickness relationship curve also comprises:
This inspection dosage-person under inspection's thickness relationship curve is carried out segmentation;
Calculate in each segmentation the average criterion dosage under between person under inspection's caliper zones.
6. fluoroscopy equipment comprises:
Thickness detector in order to before beginning inspection, is measured person under inspection's thickness;
X-ray producer checks dosage-person under inspection's thickness relationship curve in order to the thickness and one according to this person under inspection, determines the initial inspection dosage of X ray, and adjusts this initial inspection dosage according to a feedback signal;
Picture receiver receives X ray and passes the image that produces behind the person under inspection; And
Aligner according to the quality of this image, provides this X-ray producer that feeds back signal to of dose titration.
7. fluoroscopy equipment as claimed in claim 6 is characterized in that, pre-configured being somebody's turn to do checks dosage-person under inspection's thickness relationship curve in this fluoroscopy equipment.
8. fluoroscopy equipment as claimed in claim 6 is characterized in that, this fluoroscopy equipment by the human sample inspection of predetermined quantity, is set up this inspection dosage-person under inspection's thickness relationship curve at the use initial stage.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105528764A (en) * | 2015-12-01 | 2016-04-27 | 沈阳东软医疗系统有限公司 | Image brightness adjustment method, installation and device |
| CN112998733A (en) * | 2021-02-19 | 2021-06-22 | 苏州晟诺医疗科技有限公司 | CT scanning method and device and CT scanner |
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| GB1328376A (en) * | 1969-09-02 | 1973-08-30 | Philips Electronic Associated | X-ray apparatus |
| US6754307B2 (en) * | 2001-05-07 | 2004-06-22 | Koninklijke Philips Electronics N.V. | Method and device for X-ray exposure control |
| CN101115442A (en) * | 2005-02-11 | 2008-01-30 | 皇家飞利浦电子股份有限公司 | Dose rate control in an X-ray system |
| CN101627917A (en) * | 2008-07-14 | 2010-01-20 | 上海西门子医疗器械有限公司 | Method and system for determining scanning range |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1328376A (en) * | 1969-09-02 | 1973-08-30 | Philips Electronic Associated | X-ray apparatus |
| US6754307B2 (en) * | 2001-05-07 | 2004-06-22 | Koninklijke Philips Electronics N.V. | Method and device for X-ray exposure control |
| CN101115442A (en) * | 2005-02-11 | 2008-01-30 | 皇家飞利浦电子股份有限公司 | Dose rate control in an X-ray system |
| CN101627917A (en) * | 2008-07-14 | 2010-01-20 | 上海西门子医疗器械有限公司 | Method and system for determining scanning range |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105528764A (en) * | 2015-12-01 | 2016-04-27 | 沈阳东软医疗系统有限公司 | Image brightness adjustment method, installation and device |
| CN105528764B (en) * | 2015-12-01 | 2019-01-15 | 沈阳东软医疗系统有限公司 | A kind of brightness of image adjusting method, device and equipment |
| US10383594B2 (en) | 2015-12-01 | 2019-08-20 | Shenyang Neusoft Medical Systems Co., Ltd. | Image brightness adjustment |
| CN112998733A (en) * | 2021-02-19 | 2021-06-22 | 苏州晟诺医疗科技有限公司 | CT scanning method and device and CT scanner |
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Address after: Room 1098, building 3, 333 Puhui Road, Jiading Industrial Zone, Jiading District, Shanghai, 201821 Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: Room 1098, building 3, 333 Puhui Road, Jiading Industrial Zone, Jiading District, Shanghai, 201821 Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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Address after: 201807 2258 Chengbei Road, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co.,Ltd. Address before: Room 1098, building 3, 333 Puhui Road, Jiading Industrial Zone, Jiading District, Shanghai, 201821 Patentee before: Shanghai Lianying Medical Technology Co.,Ltd. |