CN106137242A - A kind of canel barium meal contrast examination exposure method and device - Google Patents

Abstract

Embodiment of the present invention discloses a kind of canel barium meal contrast examination exposure method and device.Method includes: demarcates original position in perspective video for the barium meal and final position, and demarcates point of interest between described original position and final position；Gather barium meal and flow through the change in location information of the acquisition zone being positioned between described original position and described point of interest, and the barium meal flow model pre-building the input of described change in location information is to predict that described barium meal flow to the flowing time of described point of interest from described acquisition zone；Determine image exposuring time based on described flowing time.

Description

A kind of canel barium meal contrast examination exposure method and device

Technical field

The present invention relates to medical information processing technical field, particularly relate to a kind of canel barium meal contrast examination exposure method and device.

Background technology

Computer science contacts closely with modern medicine.

Canel barium meal contrast examination, also referred to as UGI barium examination, be to allow person under inspection eat after pasty state barium sulfate (developer), move for barium stream The exposure imaging process of process.

Accurately the control time for exposure is extremely important for the high-definition picture obtaining point of interest.When currently mainly operating personnel being decided in its sole discretion exposure Between, this needs operating personnel to have superb operating experience.

Content of the invention

Embodiment of the present invention proposes a kind of canel barium meal contrast examination exposure method and device, thus determines the time for exposure voluntarily.

The technical scheme of embodiment of the present invention is as follows:

According to embodiment of the present invention, a kind of canel barium meal contrast examination exposure method is proposed, comprising:

Demarcate original position in perspective video for the barium meal and final position, and between described original position and final position, demarcate point of interest；

Gather barium meal and flow through the change in location information of the acquisition zone being positioned between described original position and described point of interest, and by described change in location information The barium meal flow model that input pre-builds is to predict that described barium meal flow to the flowing time of described point of interest from described acquisition zone；

Determine image exposuring time based on described flowing time.

Preferably, described demarcation barium meal perspective video in original position and final position include:

Based on barium meal described in the gray level image features localization of barium meal perspective video in original position and final position.

Preferably, described determine that the image exposure moment includes based on flowing time:

When flowing time is more than or equal to fix and exposes time delay, flowing time is deducted fixing exposure time delay to obtain image exposuring time； Or

When flowing time is less than fixing exposure time delay, current time is defined as image exposuring time.

Preferably, being provided with multiple sampled points that the change in location information to barium meal is sampled in described acquisition zone, described sampled point includes gathering Initial point, collection end point and the collection instantaneous point arranged by the sampling period in described collection starting point and collection end point, wherein said collection rises The position of initial point is fixing or revocable, and the position of described collection end point is fixing.

Preferably, being provided with multiple sampled points that the change in location information to barium meal is sampled in described acquisition zone, described sampled point includes gathering Initial point, collection end point and the collection instantaneous point arranged by the sampling period in described collection starting point and collection end point, wherein said collection rises The position of initial point is fixing or revocable, and the position of described collection end point is revocable, and when barium meal flows through to the flowing time predicted During the particular acquisition instantaneous point starting less than threshold value set in advance with the difference of fixing exposure time delay, described particular acquisition instantaneous point is defined as Gather end point.

Preferably, described original position is throat position；Described final position is stomach orifice of the stomach position.

Preferably, described barium meal flow model comprises swallow resistance factor and the peristaltic velocity factor.

According to embodiment of the present invention, a kind of canel barium meal contrast examination exposure device is proposed, comprising:

Demarcate unit, be used for demarcating original position in perspective video for the barium meal and final position, and mark between described original position and final position Determine point of interest；

Predicting unit, is used for gathering the change in location information that barium meal flows through the acquisition zone being positioned between described original position and described point of interest, and by institute When rheme puts the change information barium meal flow model that pre-builds of input to predict that described barium meal flow to the flowing of described point of interest from described acquisition zone Between；

Time for exposure determining unit, for determining image exposuring time based on described flowing time.

Preferably, demarcate unit, for based on barium meal described in the gray level image features localization of barium meal perspective video in original position and final position.

Preferably, time for exposure determining unit, for when flowing time is more than or equal to fix and exposes time delay, deducting fixing exposure by flowing time The light delay time is to obtain image exposuring time；Or when flowing time is less than fixing exposure time delay, when current time is defined as image exposure Between.

Preferably, being provided with multiple sampled points that the change in location information to barium meal is sampled in described acquisition zone, described sampled point includes gathering Initial point, collection end point and the collection instantaneous point arranged by the sampling period in described collection starting point and collection end point, wherein said collection rises The position of initial point is fixing or revocable, and the position of described collection end point is fixing.

Preferably, being provided with multiple sampled points that the change in location information to barium meal is sampled in described acquisition zone, described sampled point includes gathering Initial point, collection end point and the collection instantaneous point arranged by the sampling period in described collection starting point and collection end point, wherein said collection rises The position of initial point is fixing or revocable, and the position of described collection end point is revocable；

Predicting unit, for starting less than threshold value set in advance with the difference of fixing exposure time delay when barium meal flows through to the flowing time predicted Particular acquisition instantaneous point when, described particular acquisition instantaneous point is defined as gather end point.

Preferably, described original position is throat position；Described final position is stomach orifice of the stomach position.

Preferably, described barium meal flow model comprises swallow resistance factor and the peristaltic velocity factor.

From technique scheme it can be seen that in embodiments of the present invention, original position in perspective video for the barium meal and final position are demarcated, and Point of interest is demarcated between original position and final position；Gather barium meal and flow through the change in location letter of the acquisition zone being positioned between original position and point of interest Breath, and the barium meal flow model pre-building the input of change in location information is to predict that barium meal flow to the flowing time of point of interest from acquisition zone；Based on Flowing time determines image exposuring time.Visible, that embodiment of the present invention can gather based on history barium meal change in location information prediction barium meal flowing To the flowing time of point of interest, such that it is able to automatically determine image exposuring time.

Brief description

Fig. 1 is for according to embodiment of the present invention canel barium meal contrast examination exposure method flow chart；

Fig. 2 is the exemplary schematic representation of the exposure according to embodiment of the present invention canel barium meal contrast examination, and it is fixing for wherein gathering end point；

Fig. 3 is the exemplary schematic representation of the exposure according to embodiment of the present invention canel barium meal contrast examination, and it is revocable for wherein gathering end point；

Fig. 4 is for according to embodiment of the present invention canel barium meal contrast examination exposure device structure chart.

Detailed description of the invention

In order to make technical scheme and advantage clearer, below in conjunction with drawings and the embodiments, the present invention is carried out further in detail Explanation.It should be appreciated that detailed description of the invention described herein only in order to the illustrative explanation present invention, the protection model being not intended to limit the present invention Enclose.

Succinct and directly perceived in order to describe, hereafter by describing some representational embodiments, the solution of the present invention is illustrated.Embodiment party In formula, substantial amounts of details is only used for help and understands the solution of the present invention.However, it will be apparent that can be not limited to these when technical scheme realizes Details.In order to avoid unnecessarily having obscured the solution of the present invention, some embodiments do not describe meticulously, but only give framework. Hereinafter, " include " referring to " including but not limited to ", " according to ... " refer to " according at least to ..., but be not limited to according only to ... ".Due to The speech habits of Chinese, when being hereinafter not specifically stated the quantity of a composition, it is meant that it also can be multiple that this composition can be one, or can It is interpreted as at least one.

Fig. 1 is for according to embodiment of the present invention canel barium meal contrast examination exposure method flow chart.

As it is shown in figure 1, the method includes:

Step 101: demarcate original position in perspective video for the barium meal and final position, and demarcate point of interest between original position and final position.

Here, patient is first allowed to try out the barium meal of a low dose, and based on gray level image features localization barium meal the initiateing in perspective video of barium meal Position and final position.And, between original position and final position, demarcate point of interest.Point of interest is the viewing area needing exposure image, It is usually focus position.The length of whole viewing area can be determined based on original position and final position, and true based on the point of interest demarcated Determine the distance of point of interest distance original position and the distance of point of interest distance final position.

In one embodiment, original position is throat position；Final position is stomach orifice of the stomach position；Point of interest is the arbitrfary point in esophagus.

Step 102: gather barium meal and flow through the change in location information of the acquisition zone being positioned between original position and point of interest, and by defeated for change in location information Enter the barium meal flow model pre-building to predict that barium meal flow to the flowing time of point of interest from acquisition zone.

Here, patient slowly drinks a bite barium meal, and detects position in perspective video for the barium meal in real time by the gray level image feature of barium meal.When When barium meal flows through the acquisition zone being positioned between original position and point of interest, gather the change in location information of barium meal based on the sampling period, and by change in location The barium meal flow model that information input pre-builds is to predict that barium meal flow to the flowing time of point of interest from acquisition zone.

One or more instantaneous collection point can be comprised in acquisition zone, at instantaneous collection point, gather the change in location information of barium meal.Wherein, acquisition zone Change in location information can include that barium meal flows through the positional information of one or more instantaneous collection point, velocity information and acceleration information.

Here, the esophagus adding up healthy population in advance swallows resistance factor and esophagus peristaltic velocity, and swallows resistance based on the esophagus of healthy population The factor and esophagus peristaltic velocity set up barium meal flow model.

Below the process setting up barium meal flow model is carried out exemplary illustrated.

Barium meal process fluid flow can be simplified to linear model.

X_KIt is in the k-th sampling period, the vector that the displacement of barium meal fluid, speed and acceleration are constituted；First element X_kRepresent displacement, Second elementRepresentation speed, the 3rd elementRepresent acceleration.

$X_K=\left[\begin{array}{c}{X}_k\\ {\stackrel{\·}{X}}_k\\ {\stackrel{\·\·}{X}}_k\end{array}\right];$

VectorAs X_k-1Posterior estimator, before giving the K-1 cycle and include the Posterior estimator in K-1 cycle.

It is the observation data based on K-1 cycleFor vector X_KEstimation；

Gravity impact can be counted as a constant input u to barium meal flow model_k, wherein g is acceleration of gravity；

u_k=g；

Preferably, wriggling factor m is also considered as the coefficient constance force with gravity；Then u_k=g+m；

The estimation to observation for the input model is exerted one's influence, it is assumed that T represents the sampling period；Input matrix B meets:

$B=\left[\begin{array}{c}\frac{T^2}{2}\\ T\\ 1\end{array}\right];$

According to newton machinery law and fluid machinery law, can set up transition matrix F, this matrix F makes in shorter sampling period T time, Meet:

${\stackrel{\mathrm{\Λ}}{X}}_{K|K-1}=F{\stackrel{\mathrm{\Λ}}{X}}_{K-1|K-1}+{\mathrm{Bu}}_k.$

Consider there is influence of noise observation, it can be assumed that noise obeys standardized normal distribution ω_k。

ω_k～N (0, Q)；

Then have:

${\stackrel{\mathrm{\Λ}}{X}}_{K|K-1}=F{\stackrel{\mathrm{\Λ}}{X}}_{K-1|K-1}+{\mathrm{Bu}}_k+{\mathrm{\ω}}_k;$

Simplify F, wherein $F=\left[\begin{array}{c}100\\ 010\\ 001\end{array}\right];$

X_k=F X_k-1+Bu_k+ω_k；

Z_k=H_kX_k+v_k；

Here Z_kRepresent X_kMeasured value；v_kIt is measure error, v_kSame obedience standard is just distributed very much；P(ω_k)～N (0, Q)； P(v_k)～N (0, R)；Wherein Q is ω_kThe variance being just distributed very much；R is v_kThe variance being just distributed very much；

X_K=F X_K-1+Bu_k；

Prior estimate error can be definedWith Posterior estimator error e_K|K-1:

${\stackrel{\mathrm{\Λ}}{e}}_{K|K-1}=X_k-{\stackrel{\mathrm{\Λ}}{X}}_{K|k-1};$

$e_{K|K-1}=X_K-{\stackrel{\mathrm{\Λ}}{X}}_{K|K};$

Prior estimate errorCovariance matrix beWherein:

${\stackrel{\mathrm{\Λ}}{P}}_{K|K-1}=E({\stackrel{\mathrm{\Λ}}{e}}_{K|K-1}\·{{\stackrel{\mathrm{\Λ}}{e}}_{K|K-1}}^T)$

Posterior estimator error e_K|K-1Covariance matrix be P_K|K, wherein:

$P_{K|K}=E(e_{K|K}\·{\stackrel{\mathrm{\Λ}}{e}}_K|K^T)$

From Kalman filter formulation, can obtain being added, by prior estimate, the formula that a deviation calculates Posterior estimator:

$X_K={\stackrel{\mathrm{\Λ}}{X}}_{K|K-1}+K(Z^k-H_k{\stackrel{\mathrm{\Λ}}{X}}_{K|K-1})$

With season

$\frac{{\mathrm{dP}}_K}{d{K}_K}=0;$

Obtain optimizing kalman gain K_K:

$K_K=\frac{P_{K|K-1}{H}_K^T}{H_K{P}_{K|K-1}{H}_K^T+R_K};$

Kalman filter can be utilized to perform above-mentioned calculating kalman gain K_KOperation.

And, the operation of Kalman filter includes two stages: predicts and updates.At forecast period, Kalman filter uses laststate Estimate to provide the estimation to current state.In the more new stage, Kalman filter utilizes the observation optimization to current state to obtain at forecast period Estimate, to obtain a more accurate new estimation value.Can be evaluated whether to swallow resistance factor based on this Kalman filter.

First, define:

P_K|K=E (e_K|K-1·e_K|K-1 ^T)；

$e_K=X_K-{\stackrel{\mathrm{\Λ}}{X}}_{K|K};$

${\stackrel{\mathrm{\Λ}}{X}}_{K|K}={\hat{X}}_{K|K-1}+K(Z^k-H_K{\stackrel{\mathrm{\Λ}}{X}}_{K|K-1});$

UtilizeCalculate e_K, recycle e_KCalculate P_K|K, and P is obtained to K derivation_K|KMinimum of a value, i.e. have a following predictor formula:

${\stackrel{\mathrm{\Λ}}{X}}_{K|K-1}=F_K{\stackrel{\mathrm{\Λ}}{X}}_{K-1|K-1}{B}_K{u}_k;$

$P_{K|K-1}=F_K{P}_{K-1|K-1}{F}_K^T+B_K{u}_K;$

WhereinFor status predication；P_K|K-1For predicted estimate covariance matrix；

Then, computation and measurement surplusMeasurement surplus covariance S_kWith optimum kalman gain K_k；

Wherein:

${\tilde{y}}_K=Z_K-H_K{\stackrel{\mathrm{\Λ}}{X}}_{K|K-1};$

$S_K=H_K{P}_{K-1|K-1}{H}_K^T+R_K;$

$K_K=P_{K|K-1}{H}_K^T{S}_K^{-1};$

Then, measurement surplus is utilizedMeasurement surplus covariance S_KWith optimum kalman gain K_kUpdate X_KAnd X after updating_KAssociation side Difference estimates P_K|K。

Wherein:P_K|K=(I-K_KH_K)P_K|K-1；Based onCan predict that barium meal flows from acquisition zone Flowing time to point of interest.

The process setting up barium meal flow model described in detail above.It will be appreciated by those of skill in the art that this description is only exemplary, and It is not used in and embodiment of the present invention is defined.

In one embodiment:

Being provided with multiple sampled points that the change in location information to barium meal is sampled in acquisition zone, described sampled point includes gathering starting point, gathers knot Spot and the collection instantaneous point arranged by the sampling period in gathering starting point and gathering end point, the position wherein gathering starting point is fixing or non- Fixing, the position gathering end point is fixing.

In one embodiment:

Being provided with multiple sampled points that the change in location information to barium meal is sampled in acquisition zone, described sampled point includes gathering starting point, gathers knot Spot and the collection instantaneous point arranged by the sampling period in gathering starting point and gathering end point, the position wherein gathering starting point is fixing or non- Fixing, the position gathering end point is revocable, and opens with the fixing difference exposing time delay when barium meal flows through to the flowing time predicted When beginning is less than the particular acquisition instantaneous point of threshold value set in advance, particular acquisition instantaneous point is defined as gather end point.

Step 103: determine image exposuring time based on flowing time.

In one embodiment:

When flowing time is more than or equal to fix and exposes time delay, flowing time is deducted fixing exposure time delay to obtain image exposuring time. Such as, it is assumed that the flowing time of prediction is 50ms, and exposure sources fixing exposure time delay be 20ms, then image exposuring time is 50ms-20ms =30ms.

In one embodiment:

When flowing time is less than fixing exposure time delay, current time is defined as image exposuring time.Such as, it is assumed that the flowing time of prediction For 15ms, and the fixing exposure time delay of exposure sources is 20ms, then image exposuring time is current time, i.e. gets started exposure.

Below embodiment of the present invention is carried out exemplary illustrated.

Fig. 2 is the exemplary schematic representation of the exposure according to embodiment of the present invention canel barium meal contrast examination, and it is fixing for wherein gathering end point.

In fig. 2, original position 1 is the throat position in perspective video；Final position 2 is the stomach orifice of the stomach position in perspective video, and by The trajectory that beginning position 1 and final position 2 are formed is the esophagus in perspective video.Mark between supraoesophageal original position 1 and final position 2 It is shown with point of interest 3.And, between original position 1 and point of interest 3, there is acquisition zone.Acquisition zone is provided with the change in location information to barium meal The multiple sampled points sampled, described sampled point include gather starting point the 4th, gathers end point 5 and gather starting point and collection end point in The collection instantaneous point (not shown in FIG.) arranged by the sampling period, the position wherein gathering starting point 4 is fixing or revocable.Such as, adopt Integrating starting point 4 both can be as the arbitrfary point between original position 1 or original position 1 and collection end point 5.Gather the position of end point 5 It is set to fix.

Fig. 3 is the exemplary schematic representation of the exposure according to embodiment of the present invention canel barium meal contrast examination, and it is revocable for wherein gathering end point.

In figure 3, original position 1 is the throat position in perspective video；Final position 2 is the stomach orifice of the stomach position in perspective video, and by The track that beginning position 1 and final position 2 are formed is the esophagus in perspective video.It is labeled with between the original position 1 and final position 2 of esophagus Point of interest 3.And, between original position 1 and point of interest 3, there is acquisition zone.The change in location information to barium meal that is provided with in acquisition zone is carried out Sampling multiple sampled points, described sampled point include gather starting point the 4th, gathers end point 5 and gather starting point 4 and collection end point 5 in The collection instantaneous point (not shown in FIG.) arranged by the sampling period, the position wherein gathering starting point is fixing or revocable.Such as, gather Starting point 4 both can be the arbitrfary point between original position 1 or original position 1 and collection end point 5.But, gather end point 5 Position be revocable.When barium meal flows through particular acquisition instantaneous point, if the flowing time now predicted and fixing exposure time delay When starting difference less than threshold value set in advance, particular acquisition instantaneous point is defined as gather end point 5.

Such as, it is assumed that fixing exposure time delay is 20ms；Threshold value set in advance is 5ms, and the sampling period is 10ms:

The fixing exposure time delay that barium meal flow to be predicted when gathering instantaneous point 5a is 30ms, due to 30ms-20ms=10ms, and 10ms More than threshold value set in advance (5m) s, therefore collection instantaneous point 5a is not defined as gathering end point.

The fixing exposure time delay that barium meal continues to flow to be predicted when gathering instantaneous point 5 is 22ms, due to 22ms-20ms=2ms, and 2ms Less than threshold value set in advance (5ms), therefore collection instantaneous point 5 is defined as gathering end point.Now, stop gathering, and image exposure Time is defined as 22ms-20ms (i.e. 2ms), i.e. start exposure after 2ms.

Based on above-mentioned labor, embodiment of the present invention also proposed a kind of canel barium meal contrast examination exposure device.

Fig. 4 is for according to embodiment of the present invention canel barium meal contrast examination exposure device structure chart.

As shown in Figure 4, this device 9 includes:

Demarcate unit 91, be used for demarcating original position in perspective video for the barium meal and final position, and demarcate between original position and final position Point of interest；

Predicting unit 92, is used for gathering the change in location information that barium meal flows through the acquisition zone being positioned between original position and described point of interest, and by position The barium meal flow model that change information input pre-builds is to predict that described barium meal flow to the flowing time of described point of interest from acquisition zone；

Time for exposure determining unit 93, for determining image exposuring time based on flowing time.

In one embodiment:

Demarcate unit 91, for based on barium meal gray level image features localization barium meal perspective video in original position and final position.

In one embodiment:

Time for exposure determining unit 92, for when flowing time is more than or equal to fix and exposes time delay, deducting fixing exposure delay by flowing time Time is to obtain image exposuring time；Or when flowing time is less than fixing exposure time delay, current time is defined as image exposuring time.

In one embodiment:

The sampled point of acquisition zone includes gathering starting point, gathers end point and arrange by the sampling period in described collection starting point and collection end point Collection instantaneous point, the position of wherein said collection starting point is fixing or revocable, and the position of described collection end point is fixing.

In one embodiment:

Being provided with multiple sampled points that the change in location information to barium meal is sampled in acquisition zone, described sampled point includes gathering starting point, gathers knot Spot and the collection instantaneous point arranged by the sampling period in described collection starting point and collection end point, the position of wherein said collection starting point is Fixing or revocable, the position of described collection end point is revocable；

Predicting unit 92, for starting less than thresholding set in advance with the difference of fixing exposure time delay when barium meal flows through to the flowing time predicted During the particular acquisition instantaneous point being worth, described particular acquisition instantaneous point is defined as gather end point.

In one embodiment: original position is throat position；Described final position is stomach orifice of the stomach position.

In one embodiment: barium meal flow model comprises swallow resistance factor and the peristaltic velocity factor.

Can follow the application programming interfaces of certain specification, the canel barium meal contrast examination exposure method being proposed embodiment of the present invention is written as being installed to individual Plug-in card program in computer, mobile terminal, medicine equipment etc., it is also possible to be encapsulated and download use voluntarily for user for application program.Can lead to Cross instruction or the storing mode canel barium meal contrast examination exposure method that proposed embodiment of the present invention of instruction set storage is stored on various storage medium.This A little storage mediums include but is not limited to: floppy disk, CD, DVD, hard disk, flash memory etc..Furthermore it is also possible to put forward embodiment of the present invention Go out exploitation medical image application method be applied in the storage medium based on flash memory (Nand flash), such as USB flash disk, CF card, SD card, SDHC card, mmc card, SM card, memory stick, xD card etc..

In sum, in embodiments of the present invention, original position in perspective video for the barium meal and final position are demarcated, and at original position and end Stop bit demarcates point of interest between putting；Gather barium meal and flow through the change in location information of the acquisition zone being positioned between original position and point of interest, and position is become The barium meal flow model that the input of change information pre-builds is to predict that barium meal flow to the flowing time of point of interest from acquisition zone；Determine figure based on flowing time As the time for exposure.Visible, embodiment of the present invention can flow to the flowing of point of interest based on the barium meal change in location information prediction barium meal of history collection Time, such that it is able to automatically determine image exposuring time.

The above, the only better embodiment of the present invention, it is not intended to limit protection scope of the present invention.All spirit in the present invention and Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (12)

1. a canel barium meal contrast examination exposure method, it is characterised in that include:

Demarcate original position in perspective video for the barium meal and final position, and between described original position and final position, demarcate point of interest；

Gather barium meal and flow through the change in location information of the acquisition zone being positioned between described original position and described point of interest, and by described change in location information The barium meal flow model that input pre-builds is to predict that described barium meal flow to the flowing time of described point of interest from described acquisition zone；

Determine image exposuring time based on described flowing time.

2. canel barium meal contrast examination exposure method according to claim 1, it is characterised in that original position in perspective video for the described demarcation barium meal Include with final position:

Based on barium meal described in the gray level image features localization of barium meal perspective video in original position and final position.

3. canel barium meal contrast examination exposure method according to claim 1, it is characterised in that described determine that the image exposure moment wraps based on flowing time Include:

When flowing time is more than or equal to fix and exposes time delay, flowing time is deducted fixing exposure time delay to obtain image exposuring time； Or

When flowing time is less than fixing exposure time delay, current time is defined as image exposuring time.

4. canel barium meal contrast examination exposure method according to claim 1, it is characterised in that be provided with the change in location to barium meal in described acquisition zone Multiple sampled points that information is sampled, described sampled point includes gathering starting point, gathers end point and terminate in described collection starting point and collection The collection instantaneous point arranged by the sampling period in point, the position of wherein said collection starting point is fixing or revocable, the position of described collection end point It is set to fix.

5. canel barium meal contrast examination exposure method according to claim 1, it is characterised in that be provided with the change in location to barium meal in described acquisition zone Multiple sampled points that information is sampled, described sampled point includes gathering starting point, gathers end point and terminate in described collection starting point and collection The collection instantaneous point arranged by the sampling period in point, the position of wherein said collection starting point is fixing or revocable, the position of described collection end point It is set to revocable, and start less than threshold value set in advance with the difference of fixing exposure time delay when barium meal flows through to the flowing time predicted Particular acquisition instantaneous point when, described particular acquisition instantaneous point is defined as gather end point.

6. canel barium meal contrast examination exposure method according to claim 1, it is characterised in that comprise to swallow resistance factor in described barium meal flow model With the peristaltic velocity factor.

7. a canel barium meal contrast examination exposure device, it is characterised in that include:

Demarcate unit, be used for demarcating original position in perspective video for the barium meal and final position, and mark between described original position and final position Determine point of interest；

Predicting unit, is used for gathering the change in location information that barium meal flows through the acquisition zone being positioned between described original position and described point of interest, and by institute When rheme puts the change information barium meal flow model that pre-builds of input to predict that described barium meal flow to the flowing of described point of interest from described acquisition zone Between；

Time for exposure determining unit, for determining image exposuring time based on described flowing time.

8. canel barium meal contrast examination exposure device according to claim 7, it is characterised in that

Described demarcation unit based on barium meal described in the gray level image features localization of barium meal perspective video in original position and final position.

9. canel barium meal contrast examination exposure device according to claim 7, it is characterised in that

When flowing time is more than or equal to fix and exposes time delay, flowing time is deducted fixing exposure time delay by described time for exposure determining unit To obtain image exposuring time；Or when flowing time is less than fixing exposure time delay, current time is defined as by described time for exposure determining unit Image exposuring time.

10. canel barium meal contrast examination exposure device according to claim 7, it is characterised in that be provided with the change in location to barium meal in described acquisition zone Multiple sampled points that information is sampled, described sampled point includes gathering starting point, gathers end point and terminate in described collection starting point and collection The collection instantaneous point arranged by the sampling period in point, the position of wherein said collection starting point is fixing or revocable, the position of described collection end point It is set to fix.

11. canel barium meal contrast examination exposure devices according to claim 7, it is characterised in that be provided with the change in location to barium meal in described acquisition zone Multiple sampled points that information is sampled, described sampled point includes gathering starting point, gathers end point and terminate in described collection starting point and collection The collection instantaneous point arranged by the sampling period in point, the position of wherein said collection starting point is fixing or revocable, the position of described collection end point It is set to revocable；

Predicting unit, for starting less than threshold value set in advance with the difference of fixing exposure time delay when barium meal flows through to the flowing time predicted Particular acquisition instantaneous point when, described particular acquisition instantaneous point is defined as gather end point.

12. canel barium meal contrast examination exposure devices according to claim 7, it is characterised in that comprise to swallow resistance factor in described barium meal flow model With the peristaltic velocity factor.