CN108652657A - Bed board settling amount acquisition methods, multi-modal medical image system and computer readable storage medium - Google Patents
Bed board settling amount acquisition methods, multi-modal medical image system and computer readable storage medium Download PDFInfo
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- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
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- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
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- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
- A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
- A61B6/5235—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT
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Abstract
An embodiment of the present invention provides a kind of bed board settling amount acquisition methods, multi-modal medical image system and computer readable storage mediums, are related to technical field of image processing.On the one hand, in the embodiment of the present invention, first, the CT images of subject are obtained, according to the CT images, equivalent mass of the acquisition subject in each specified location；Then, the product for the settling amount that the unit mass of the equivalent mass and each specified location that obtain each specified location causes, obtains the subject settling amount of each specified location；To according to the subject settling amount of each specified location and the bed board of each specified location dead weight settling amount, total settlement of the acquisition bed board in each specified location.Therefore, when technical solution provided in an embodiment of the present invention can solve to use the mode of laser positioning to measure the settling amount of each specified location of bed board in the prior art, because needing additionally to increase scan protocols, the problem of caused realization method complexity in scanning system.
Description
【Technical field】
The present invention relates to technical field of image processing more particularly to a kind of bed board settling amount acquisition methods, multi-modal medicine
Imaging system and computer readable storage medium.
【Background technology】
CT scan (Computed Tomography, CT) can provide the precise anatomical positioning of lesion, and
Positron Emission Computed Tomography (Positron Emission Tomography, PET) can provide lesion detailed work(
Can with metabolism etc. divide sub-information.CT anatomic images and PET functional metabolisms image are organically combined together by PET-CT systems, are shown
Improve the diagnosis capability to small lesion with writing.
In long axial direction PET-CT systems, when bed board stretch out firm banking it is longer apart from when, bed board is far from pedestal
One end, which is affected by gravity, can deform upon bending, cause to settle, to cause the CT images obtained in advance can not be with Current Scan
PET image matching.For the problem, in the prior art using scheme be using obtaining settling amount by the way of laser positioning,
Specifically, in each scanning with the settling amount of each specified location of laser location surveying bed board.
However, in the prior art, when measuring the settling amount of each specified location of bed board using the mode of laser positioning, because needing
Additionally to increase scan protocols in scanning system, cause realization method complicated.
【Invention content】
In view of this, an embodiment of the present invention provides a kind of bed board settling amount acquisition methods, multi-modal medical image systems
And computer readable storage medium, to solve to use the mode of laser positioning to measure each specified location of bed board in the prior art
Settling amount when, because need additionally increase scan protocols, the problem of caused realization method complexity in scanning system.
On the one hand, an embodiment of the present invention provides a kind of bed board settling amount acquisition methods, the bed board includes being set close to CT
Standby first end, and second end opposite with the first end, far from the CT equipment, the first end and described second
Include at least one designated position between end, the method includes：
Obtain the CT images of subject；
According to the CT images, equivalent mass of the acquisition subject in each specified location；
The sedimentation that the unit mass of the equivalent mass and each specified location that obtain each specified location causes
The product of amount obtains the subject settling amount of each specified location；
Conducted oneself with dignity settling amount according to the bed board of the subject settling amount of each specified location and each specified location,
Obtain the bed board each specified location total settlement.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, according to described each
The bed board dead weight settling amount of the subject settling amount of specified location and each specified location, obtains the bed board described
The total settlement of each specified location, including：
Designated treatment is carried out to the subject settling amount of each specified location, obtains the subject at the second end
Settling amount；
The subject settling amount at the second end and the sum of the bed board dead weight settling amount at the second end are obtained, is obtained
To total settlement of the bed board at the second end；
According between each designated position and the second end relative position relation and the bed board described
Total settlement at two ends, obtain the bed board each specified location total settlement.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, the opposite position
Set ratio of the relationship between the first distance and second distance；Wherein, it is described first distance be each designated position with it is described
The distance between first end, the second distance are the distance between the first end and the second end.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, according to described each
The total settlement of relative position relation and the bed board at the second end between designated position and the second end, is obtained
Take the bed board in the total settlement of each specified location, including：
The product for obtaining the bed board total settlement at the second end and the relative position relation obtains the bed
Total settlement of the plate in each specified location.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, according to the CT
Image, obtain subject each specified location equivalent mass, including：
According to the CT images, the CT values of each specified location are obtained, the CT values are for characterizing subject tissue
Density；
According to the CT values of each specified location, the weight for obtaining the subject in each specified location forms knot
Structure；
According to the subject in the weight composed structure of each specified location, the subject is obtained in each designated position
The equivalent mass at place.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, the method is also
Including：
Obtain the settling amount that the unit mass of each specified location causes；
According to the settling amount that the unit mass of each specified location causes, unit mass settling amount look-up table is generated.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method obtains described each
The settling amount that the unit mass of specified location causes, including：
Each specified location between the first end and the second end places carrier, obtains the carrying
Carrying settling amount of the object in each specified location；
It is heavy in the carrying settling amount of each specified location and bed board dead weight described in the specified location to obtain the carrier
The difference of drop amount obtains the net carrying settling amount of each specified location；
The quotient for obtaining net the carrying settling amount and the quality of the carrier of each specified location, obtains each finger
The settling amount that the unit mass at place causes is set in positioning.
On the other hand, an embodiment of the present invention provides a kind of multi-modal medical image systems, including：
CT scanner has the first scanner bore；
There is PET scanner the second scanner bore, the PET scanner mutually to be coupled with the CT scanner, and described first
Scanner bore aligns with second scanner bore, and the axial length of first scanner bore is less than described second and scans
The axial length of vestibule；
Bed board for carrying subject, and can be moved to institute after carrying the subject from second scanner bore
It states the first scanner bore or is moved to second scanner bore from first scanner bore；
Processor connects the CT scanner and/or the PET scanner, and the CT images for obtaining subject are described
CT images correspond to scan data of the subject in the first scanner bore；According to the CT images, subject is obtained each specified
Equivalent mass at position；
The sedimentation that the unit mass of the equivalent mass and each specified location that obtain each specified location causes
The product of amount, obtain the bed board each specified location subject settling amount；
Conducted oneself with dignity settling amount according to the bed board of the subject settling amount of each specified location and each specified location,
Obtain the bed board each specified location total settlement.
The aspect and any possible implementation manners as described above, it is further provided a kind of realization method, the processor
It is additionally operable to realize following operation：
The CT images are converted according to the total settlement of each specified location, obtain CT changing images；
The PET data of same subject is obtained, the PET data corresponds to scanning number of the subject in the second scanner bore
According to；
The PET image that PET data obtains subject is rebuild, and is become based on the CT in the PET data reconstruction process
It changes image and correction for attenuation is carried out to the PET image.
In another aspect, an embodiment of the present invention provides a kind of computer readable storage mediums, including：Computer is executable to be referred to
It enables, the bed board settling amount acquisition methods of any of the above-described kind of realization method is executed when the computer executable instructions are run.
In the embodiment of the present invention, the settling amount of each specified location of bed board is decomposed into settling amount caused by subject weight
Settling amount caused by conducting oneself with dignity with bed board is based on this, by directly handling the collected CT images of institute, can obtain in real time
Take subject in the equivalent mass of each specified location, to according to subject in the equivalent mass of each specified location and respectively
The product for the settling amount that the unit mass of specified location causes, it will be able to obtain the subject settling amount of each specified location, grasp
Make simply, accuracy is high, in turn, in conjunction with bed board from the settling amount for focusing on each specified location, can obtain each specific bit of bed board
The total settlement for setting place is avoided using ancillary equipment, and cost is relatively low, also, is not necessarily to additionally increase any sweep in the process
Agreement is retouched, implementation complexity is reduced.Therefore, compared to the prior art in using the mode of laser positioning to measure bed board each specified
The scheme of settling amount at position, the embodiment of the present invention can solve to use the mode of laser positioning to measure bed board in the prior art
When the settling amount of each specified location, because needing additionally to increase scan protocols in scanning system, caused realization method is complicated
The problem of.
【Description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is the side structure schematic view between the bed board and CT that the embodiment of the present invention is provided；
Fig. 2 is the flow diagram for the bed board settling amount acquisition methods that the embodiment of the present invention is provided；
Fig. 3 is that the subject that obtains that the embodiment of the present invention is provided is illustrated in the flow of the equivalent mass of each specified location
Figure；
Fig. 4 is the flow for the settling amount that the unit mass for each specified location of acquisition that the embodiment of the present invention is provided causes
Schematic diagram；
Fig. 5 is that the bed board that obtains that the embodiment of the present invention is provided is illustrated in the flow of the total settlement of each specified location
Figure；
Fig. 6 is the functional block diagram for the bed board settling amount acquisition device that the embodiment of the present invention is provided；
Fig. 7 is the multi-modal medical image system structural schematic diagram that the embodiment of the present invention is provided.
【Specific implementation mode】
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention below in conjunction with the accompanying drawings
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is not intended to be limiting merely for the sake of the purpose of description specific embodiment
The present invention.In the embodiment of the present invention and "an" of singulative used in the attached claims, " described " and "the"
It is also intended to including most forms, unless context clearly shows that other meanings.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate：Individualism A, exists simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, it is a kind of relationship of "or" to typically represent forward-backward correlation object.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
An embodiment of the present invention provides a kind of bed board settling amount acquisition methods, as shown in Figure 1, it is institute of the embodiment of the present invention
Side structure schematic view between the bed board and CT of offer, the bed board include the first end A close to CT equipment, and with this first
Second end B opposite, far from CT equipment is held, includes at least one designated position between first end and second end.For the ease of
Understand, a designated position C between first end A and second end B is shown in Fig. 1.
Referring to FIG. 2, the flow diagram of its bed board settling amount acquisition methods provided by the embodiment of the present invention, the bed
Plate settling amount acquisition methods can specifically include following steps：
S201 obtains the CT images of subject.
S202, according to CT images, equivalent mass of the acquisition subject in each specified location.
It should be noted that CT images are the one or more slices obtained by image reconstruction algorithm by CT scan data
Image, such as cross section, wherein image reconstruction algorithm can include but is not limited to filtered back-projection (Filtered Back
Projection, FBP) and ordered subset expectation maximization value method (Ordered Subsets Expectation
At least one of Maximization, OSEM).
Illustratively, the 3D rendering that CT images can be made of n sectioning image (2D slice images), wherein n is big
In or equal to 1 positive integer.In this embodiment, multiple 2D cross-sectional images accumulate the CT to form 3D along subject height direction
Image, one or more layers (each 2D cross-sectional images) and the designated position on bed board of CT images correspond.It is appreciated that
, the position of CT scan is entirely known under normal conditions, such as can be by the relevant positioning of image scanning as determining.According to CT
The position of scanning is that can determine that bed stretches out the distance of holder, and there are correspondences for the two.Further, pass through each of CT images
Slice can determine the position of subject.
S203, obtain settling amount that the unit mass of the equivalent mass of each specified location and the specified location causes it
Product, obtains the subject settling amount of each specified location.The subject settling amount of each specified location of sick bed in the application can
After referring to sick bed carrying subject, the bed board deflection that is caused in each specified location by subject weight.
S204 is obtained according to the subject settling amount of each specified location and the bed board of specified location dead weight settling amount
Take bed board in the total settlement of each specified location.
Hereinafter, the realization method to above steps illustrates respectively.
In order to make it easy to understand, first, the embodiment of the present invention provides a kind of mode for realizing S202 steps, referring to FIG. 3, its
Subject is obtained by what the embodiment of the present invention provided in the flow diagram of the equivalent mass of each specified location, it specifically can be with
Include the following steps：
S2021, according to CT images, CT value of the acquisition subject in each specified location.
Illustratively, according to pre-set designated position, obtain in the collected CT images of institute with the designated position pair
The CT sectioning images answered, to according to CT sectioning images, determine the CT values of the specified location.
It should be pointed out that CT values are that respectively tissue is in CT images with the comparable respective value of x-ray attenuation coefficient or absorption
Number.The density of histoorgan can be obtained by grayscale different in CT images.In this embodiment, CT values are for characterizing subject
The density of tissue, measurement unit is Heng Shi units (Hounsfield Unit, HU), for example, the CT values of bone portion are ranging from
700HU or more, CT values ranging from 35~55HU of muscle, fatty CT values ranging from -120~-90HU, the CT value ranges of lung
For -700~-600HU, and the CT values of air are in -1000HU or so, i.e.,：The density of histoorgan is bigger, and corresponding CT values are got over
Greatly；Conversely, then corresponding CT values are with regard to smaller.
S2022, according to the CT values of each specified location, weight composed structure of the acquisition subject in each specified location.
The CT values of subject different tissues are different, therefore, can determine that this refers to according to the CT values at any given position
The volume proportion of the total volume of the tissues such as the weight composed structure, such as bone, muscle or fat at place is set in positioning.
During concrete implementation, weight composed structure can use three-dimensional bodies multigraph to carry out table as M (x, y, z)
Show, wherein the directions x, the directions z are located at same level, the directions z can be set to system axial direction or subject in sick bed
Head-to-toe front-rear direction when upper detection, the directions x intersect vertically with the directions z generates intersection point, and the directions y are located at and the horizontal plane
Vertical plane, and the intersection point for the generation that intersects vertically by the directions x and the directions z.Wherein, the physics meaning that each reference axis is referred to
Justice can be set as needed.
S2023 obtains subject in each specified location according to subject in the weight composed structure of each specified location
Equivalent mass.
It, can be by by three dimensions when executing the step based on the weight institutional framework that three-dimension space image indicates
Weight image M (x, y, z) is compressed to the one-dimensional space in the z-direction, obtains the equivalent mass S (z) of subject, can simplify calculating,
I.e.
The embodiment of the present invention for ease of understanding now illustrates the equivalent mass for obtaining subject in each specified location
Process.For example, the first end with bed board is as a reference point, it is designated position apart from 5 centimeters of reference point, with the designated position
Corresponding is the second sectioning image in CT images, by the second sectioning image CT values known to this layer be by bone, muscle and
Fat composition, wherein bone volume account for bone, muscle and fatty total volume V 10%, muscle volume accounts for bone, muscle and fat
The 50% of fat total volume V, fat volume account for bone, muscle and fatty total volume V 40%, then the equivalent matter of the specified location
Amount is ρBone× 10%V+ ρMuscle× 50%V+ ρFat× 40%V, wherein ρBoneFor the density of bone, ρMuscleFor the density of muscle, ρFat
For the density of fat, ρBone、ρMuscleAnd ρFatIt is constant.
Secondly, when executing S203 steps, the settling amount for needing the unit mass for obtaining each specified location to cause please join
Fig. 4 is examined, the flow of the settling amount of the unit mass initiation of each specified location of acquisition provided by the embodiment of the present invention is shown
It is intended to, specifically comprises the following steps：
S2031, each specified location between the first and second ends place carrier, obtain carrier each specified
Carrying settling amount at position.It is alternatively possible to first end is reference position, since first end is directed toward the direction of second end,
Multiple designated positions can be arranged in distance reference position.In practical applications, it is believed that second end is that distance reference position is farthest
Designated position.
Optionally, the position of CT scan is entirely known, such as can may be used also by the relevant positioning of image scanning as determining
It is determined by the position relationship of CT images and background image.Further, it can determine that bed stretches out branch according to the position of CT scan
The distance of frame, there are correspondences for the two.In this embodiment, using each layer CT images determine each distance reference position away from
From, can't be to the operation of settling amount even if subject changes therewith if having its corresponding CT image of movement in scanning process
Cause error.
S2032 obtains carrier in carrying settling amount and the specified location bed board of each specified location from resedimentation
The difference of amount, obtains the net carrying settling amount of each specified location.
S2033 obtains the quotient of the net carrying settling amount of each specified location and the quality of carrier, obtains each designated position
The settling amount that the unit mass at place causes.
It should be noted that the following two kinds mode can be passed through by executing each specified location bed board dead weight settling amount in S2032
It obtains：
The first, first, by directly reading in manufacture parameter, settling amount of the bed board at second end；Then, according to finger
Positioning is set at a distance from first end and the distance between first end and second end, and it is heavy to obtain each specified location bed board dead weight
Drop amount.
For example, designated position is l at a distance from first end1, the distance between first end and second end are D1, bed board is
Settling amount at two ends is Δ x ', then each specified location bed board dead weight settling amount Δ x1For
Second, measure the vertical range of vertical range and second end from the ground of bed board first end from the ground, the two
Make difference and can be obtained settling amount of the bed board at second end.
For example, the vertical range of bed board first end from the ground is d1, the vertical range of second end from the ground is d2, then bed board
Settling amount Δ x at second end " is
Δ x "=d1-d2
Designated position is l at a distance from first end2, the distance between first end and second end are D2, then each specified location
Bed board dead weight settling amount Δ x2For
Now for example, the realization process for the settling amount that the unit mass for obtaining each specified location causes.Illustratively,
Using first end as reference point, apart from reference point a1Place is designated position 1, apart from reference point a2Locate to be designated position 2, first
The distance between end and second end are D.The carrier that quality is G is placed on designated position 1, measurement obtains at designated position 1
Carrying settling amount be b1, then, which is placed on designated position 2, measures the carrying sedimentation obtained at designated position 2
Amount is b2, wherein G is the positive number more than or equal to 1.And the bed board dead weight settling amount at designated position 1 is c1, at designated position 2
Bed board dead weight settling amount be c2, it is therefore intended that the settling amount e that the unit mass at position 1 causes1For
The settling amount e that unit mass at designated position 2 causes2For
Thus, it is possible to the settling amount that the unit mass for obtaining each specified location causes.
In a specific application scenarios, according to the settling amount that the unit mass of each specified location causes, generate single
Position quality settling amount look-up table, directly carries out respective alignment to follow-up CT images, avoids duplicate measurements settling amount data, carry
The high efficiency of data processing.
What the unit mass of equivalent mass and the specified location based on the above-mentioned each specified location got caused
The product of settling amount obtains the subject settling amount of each specified location.
In turn, the embodiment of the present invention, which provides, obtains bed board in the total of each specified location in following two realization S204 steps
The realization method of settling amount：
The first, as shown in figure 5, it obtains bed board in the total heavy of each specified location by what the embodiment of the present invention provided
The flow diagram of drop amount, the realization method specifically comprise the following steps：
S2041 carries out designated treatment to the subject settling amount of each specified location, and the subject obtained at second end is heavy
Drop amount.
It should be noted that the processing mode of designated treatment is：Using first end as reference point, according to separate first end and connect
The direction of nearly second end obtains each specified location subject settling amount and is settled with previous specified location subject successively
The sum of the difference of amount, and obtain these differences, obtain the subject settling amount at second end.
For example, having designated position 1, designated position 2 and designated position 3 between bed board first end and second end, refer to
It is h that the subject settling amount at 1 is set in positioning1, the subject settling amount at designated position 2 is h2, the subject at designated position 3
Settling amount is h3.Assuming that being reference point at first end, do not settle herein, then the subject settling amount at designated position 1 and the
The settling amount difference of one end is Δ y1, the subject settling amount at designated position 2 and the subject settling amount at designated position 1 are poor
Value is Δ y2, the subject settling amount at designated position 3 and the subject settling amount difference at designated position 2 are Δ y3, then,
Subject settling amount Δ y at second end is
Δ y=Δs y1+Δy2+Δy3
S2042 obtains the subject settling amount at second end and the sum of the bed board dead weight settling amount at second end, obtains
Total settlement of the bed board at second end.
Illustratively, the subject settling amount at second end is Δ y, and the bed board dead weight settling amount at second end is Δ x, that
, total settlement Δ of the bed board at second endfinalFor
Δfinal=Δ x+ Δs y
S2043, according between each designated position and second end relative position relation and bed board it is total at second end
Settling amount, total settlement of the acquisition bed board in each specified location.
It should be noted that ratio of the relative position relation between the first distance and second distance, wherein the first distance
L is the distance between each designated position and first end, and second distance D is the distance between first end and second end.
Obtain total settlement Δ of the bed board at second endfinalWith the product of relative position relation, bed board is obtained each specified
Total settlement Δ at positionlFor
Second, by the subject settling amount of each specified location and the bed board of specified location dead weight settling amount phase
Add, thus obtains bed board in the total settlement of each specified location, calculate simple.
On the basis of the above embodiments, the present embodiment provides a kind of computer readable storage medium.
Illustratively, computer readable storage medium includes computer executable instructions, is referred to when the computer is executable
When order is run, it is able to carry out the bed board settling amount acquisition methods gone out given in the present embodiment.
In the embodiment of the present invention, the settling amount of each specified location of bed board is decomposed into settling amount caused by subject weight
Settling amount caused by conducting oneself with dignity with bed board is based on this, by directly handling the collected CT images of institute, can obtain in real time
Take subject in the equivalent mass of each specified location, to according to subject in the equivalent mass of each specified location and respectively
The product for the settling amount that the unit mass of specified location causes, it will be able to obtain the subject settling amount of each specified location, grasp
Make simply, accuracy is high, in turn, in conjunction with bed board from the settling amount for focusing on each specified location, can obtain each specific bit of bed board
The total settlement for setting place is avoided using ancillary equipment, and cost is relatively low, also, is not necessarily to additionally increase any sweep in the process
Agreement is retouched, implementation complexity is reduced.Therefore, compared to the prior art in using the mode of laser positioning to measure bed board each specified
The scheme of settling amount at position, the embodiment of the present invention can solve to use the mode of laser positioning to measure bed board in the prior art
When the settling amount of each specified location, because needing additionally to increase scan protocols in scanning system, caused realization method is complicated
The problem of.
Embodiment two
Based on the bed board settling amount acquisition methods that above-described embodiment one is provided, the embodiment of the present invention further provides realization
A kind of bed board settling amount acquisition device of the above method, as shown in Fig. 1 in embodiment one, which includes close to CT equipment
First end A, and second end B opposite with first end, far from CT equipment, include at least one between first end and second end
Designated position.In order to make it easy to understand, showing a designated position C between first end A and second end B in Fig. 1.
Specifically, referring to FIG. 6, the function block of its bed board settling amount acquisition device provided by the embodiment of the present invention
Figure.As shown in fig. 6, the bed board settling amount acquisition device 61 includes：
First acquisition unit 601, the CT images for obtaining subject, and according to the CT images, subject is obtained each
The equivalent mass of specified location；
Second acquisition unit 602, for obtaining the equivalent mass of each specified location and the unit matter of each specified location
The product for measuring the settling amount caused, obtains the subject settling amount of each specified location；
Third acquiring unit 603 is used for the bed of the subject settling amount and each specified location according to each specified location
Plate dead weight settling amount, total settlement of the acquisition bed board in each specified location.
During a concrete implementation, first acquisition unit 601 is specifically used for, according to collected CT images, obtaining
The CT values of each specified location, CT values is taken to be used to characterize the density of subject tissue；
According to the CT values of each specified location, weight composed structure of the acquisition subject in each specified location；
According to subject in the weight composed structure of each specified location, subject is obtained in the equivalent of each specified location
Quality.
During a concrete implementation, second acquisition unit 602 is specifically used for obtaining the unit of each specified location
The settling amount that quality causes.
In turn, second acquisition unit 602, each specified location being additionally operable between the first and second ends place carrying
Object, carrying settling amount of the acquisition carrier in each specified location；
Obtain carrier the carrying settling amount of each specified location and the specified location bed board dead weight settling amount difference,
Obtain the net carrying settling amount of each specified location；
The quotient for obtaining the net carrying settling amount of each specified location and the quality of carrier, obtains the list of each specified location
The settling amount that position quality causes.
In a specific application scenarios, second acquisition unit 602 is additionally operable to the unit matter according to each specified location
The settling amount caused is measured, unit mass settling amount look-up table is generated.
During a concrete implementation, third acquiring unit 603 is specifically used for the subject to each specified location
Settling amount carries out designated treatment, obtains the subject settling amount at second end；
The subject settling amount at the second end and the sum of the bed board dead weight settling amount at second end are obtained, bed board is obtained and exists
Total settlement at second end；
According to the total settlement of relative position relation and bed board at second end between each designated position and second end,
Total settlement of the acquisition bed board in each specified location.
It should be noted that ratio of the relative position relation between the first distance and second distance；Wherein, the first distance
For the distance between each designated position and first end, second distance is the distance between first end and second end.
Illustratively, third acquiring unit 603 is additionally operable to obtain total settlement and relative position of the bed board at second end
The product of relationship, obtain bed board each specified location total settlement.
In a specific application scenarios, third acquiring unit 603, the subject for obtaining each specified location sinks
The sum of bed board dead weight settling amount of drop amount and each specified location, obtain bed board each specified location total settlement.
Method shown in embodiment one is able to carry out by each unit in this present embodiment, what the present embodiment was not described in detail
Part can refer to the related description to embodiment one.
On the basis of the above embodiments, the embodiment of the present invention also proposes a kind of multi-modal medical image system comprising
Both modalities which medical imaging devices, both modalities which medical imaging devices share same bed board, but both modalities which medical imaging devices
With different axial aperture or length.Usually, bed board holder is arranged in the smaller medical imaging devices of axial aperture, bed
Plate can be moved in the larger medical imaging devices in another aperture, but will produce certain sedimentation.
As shown in fig. 7, the multi-modal medical image system structural schematic diagram provided by the embodiment of the present invention comprising：
CT scanner may include that the holder of CT detectors support detector, shell surround CT detectors and holder, be formed
The first scanner bore with certain pore size.In this embodiment, the radial direction of the first scanner bore may be configured as the left sides 25-50cm
The length on the right side, axial direction is set as 20-40cm or so.Further, bed board holder (figure midsole is set in the first scanner bore
Seat), which can support bed board, and be movable connection between bed board holder and sick bed.For example, after carrying subject
It can be moved to PET scanner vestibule from the vestibule of CT scanner or move CT scanner vestibule from PET scanner vestibule.
PET scanner, the PET scanner are mutually coupled with CT scanner.In one embodiment, PET scanner includes PET
Detector and holder, shell surround pet detector and holder, form the second scanner bore with certain pore size.Implement herein
In example, pet detector includes multiple pet detector rings axially arranged side by side.Further, the first scanner bore
It axially aligns with the second scanner bore, and the axial length of the first scanner bore is less than second scanner bore
Axial length.In this embodiment, the radial direction of the second scanner bore may be configured as 25-50cm or so, the length of axial direction
It is set as 1.2-2m or so.
Processor connects the CT scanner and/or the PET scanner, for determining subject in the second scanning holes
Settling amount of the intracavitary relative to the first scanner bore.It should be noted that since the axial dimension of the first scanner bore is smaller, and
Bed board holder supports bed board, and bed board settling amount caused by own wt in the first scanner bore can be ignored herein.Therefore,
Herein it is believed that bed board in the first scanner bore without sedimentation.
In one embodiment, determine subject in the second scanner bore relative to the settling amount packet of the first scanner bore
It includes：
The CT data of subject are obtained, which is that sick bed is obtained in the first scanner bore.Optionally, scanned
Mobile bed board in journey, to which the CT data obtained may include the data of multiple scanning beds.In this embodiment, CT data can wrap
Include the scan data of five beds.
Rebuild the CT images of CT data acquisition subjects.Optionally, filtered back projection side can be used in CT data reconstructions algorithm
Method (FBP), mixed iteration method (iDose4), full iterative model method for reconstructing (IMR), partial reconstruction method (LocalRA) or
Modified arithmetic reconstruction method etc..
The settling amount of bed board opposite coupling position in the second scanner bore is determined according to CT images.In this embodiment,
Settling amount includes the first settling amount, which is bed board settling amount caused by carrying the subject.
In another embodiment, since the axial dimension of the second scanner bore is smaller, and bed board holder apart from bed board farther out,
Bed board settling amount caused by own wt in scanner bore just becomes more apparent.Therefore, in this embodiment, may be used
Determine that second settling amount of the bed board in the second scanner bore, second settling amount are to conduct oneself with dignity to couple position relatively due to bed board
Settling amount.
In another embodiment, deformation process can be carried out to CT images according to the bed board settling amount being calculated, obtained
The CT strain images to match with PET scan bed, and then applied to the correction for attenuation in PET reconstruction process.In this embodiment
In, CT images can be converted according to the first settling amount and the second settling amount, obtain CT changing images.Obtain same subject
PET data, the PET data be sick bed obtained in the second scanner bore；The PET image that PET data obtains subject is rebuild,
And correction for attenuation is carried out to PET image based on CT changing images in PET data reconstruction process, such as：It is determined based on CT images
Decay pattern corrects PET image using decay pattern.In this embodiment, following formula can be used in the deformation of CT images：
M (x, y, z)=CT (x, y+ Δ z, z)
Wherein, M (x, y, z) indicates that the image after CT deformation, CT (x, y, z) indicate before original CT image or deformation
Image, x, y and z indicate left and right directions, upper and lower directions and front-rear direction of the subject when on bed board being supine body position respectively
(axial direction), Δ z indicate bed board settling amount.
In the embodiment of the present invention, the settling amount of each specified location of bed board is decomposed into settling amount caused by subject weight
Settling amount caused by conducting oneself with dignity with bed board is based on this, by directly handling the collected CT images of institute, can obtain in real time
Take subject in the equivalent mass of each specified location, to according to subject in the equivalent mass of each specified location and respectively
The product for the settling amount that the unit mass of specified location causes, it will be able to obtain the subject settling amount of each specified location, grasp
Make simply, accuracy is high, in turn, in conjunction with bed board from the settling amount for focusing on each specified location, can obtain each specific bit of bed board
The total settlement for setting place is avoided using ancillary equipment, and cost is relatively low, also, is not necessarily to additionally increase any sweep in the process
Agreement is retouched, implementation complexity is reduced.Therefore, compared to the prior art in using the mode of laser positioning to measure bed board each specified
The scheme of settling amount at position, the embodiment of the present invention can solve to use the mode of laser positioning to measure bed board in the prior art
When the settling amount of each specified location, because needing additionally to increase scan protocols in scanning system, caused realization method is complicated
The problem of.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, for example, multiple units or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
It is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present invention
The part steps of embodiment the method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
The medium of program code can be stored.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (10)
1. a kind of bed board settling amount acquisition methods, which is characterized in that the bed board includes the first end close to CT equipment, Yi Jiyu
The second end of opposite, the separate CT equipment of the first end includes at least one between the first end and the second end
A designated position, the method includes：
Obtain the CT images of subject；
According to the CT images, equivalent mass of the acquisition subject in each specified location；
Obtain settling amount that the unit mass of the equivalent mass of each specified location and each specified location causes it
Product, obtain the bed board each specified location subject settling amount.
According to the subject settling amount of each specified location and the bed board of each specified location dead weight settling amount, obtain
Total settlement of the bed board in each specified location.
2. according to the method described in claim 1, it is characterized in that, according to the subject settling amount of each specified location with
The bed board dead weight settling amount of each specified location, obtains the bed board in the total settlement of each specified location, packet
It includes：
Designated treatment is carried out to the subject settling amount of each specified location, obtains the subject sedimentation at the second end
Amount；
The subject settling amount at the second end and the sum of the bed board dead weight settling amount at the second end are obtained, is obtained described
Total settlement of the bed board at the second end；
According between each designated position and the second end relative position relation and the bed board in the second end
The total settlement at place, obtain the bed board each specified location total settlement.
3. according to the method described in claim 2, it is characterized in that, the relative position relation is the first distance and second distance
Between ratio；Wherein, it is described first distance be the distance between each designated position and the first end, described second away from
From for the distance between the first end and the second end.
4. according to the method described in claim 3, it is characterized in that, according between each designated position and the second end
The total settlement of relative position relation and the bed board at the second end obtains the bed board in each specified location
Total settlement, including：
The product for obtaining the bed board total settlement at the second end and the relative position relation obtains the bed board and exists
The total settlement of each specified location.
5. according to the method described in claim 1, it is characterized in that, according to the CT images, subject is obtained in each specific bit
The equivalent mass at place is set, including：
According to the CT images, the CT values of each specified location are obtained, the CT values are for characterizing the close of subject tissue
Degree；
According to the CT values of each specified location, obtain the subject each specified location weight composed structure；
According to the subject in the weight composed structure of each specified location, the subject is obtained in each specified location
Equivalent mass.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
Obtain the settling amount that the unit mass of each specified location causes；
According to the settling amount that the unit mass of each specified location causes, unit mass settling amount look-up table is generated.
7. according to the method described in claim 6, it is characterized in that, what the unit mass for obtaining each specified location caused
Settling amount, including：
Each specified location between the first end and the second end places carrier, obtains the carrier and exists
The carrying settling amount of each specified location；
Obtain carrying settling amount of the carrier in each specified location and bed board dead weight settling amount described in the specified location
Difference, obtain the net carrying settling amount of each specified location；
The quotient for obtaining net the carrying settling amount and the quality of the carrier of each specified location, obtains each specific bit
Set the settling amount that the unit mass at place causes.
8. a kind of multi-modal medical image system, which is characterized in that including：
CT scanner has the first scanner bore；
There is PET scanner the second scanner bore, the PET scanner mutually to be coupled with the CT scanner, first scanning
Vestibule aligns with second scanner bore, and the axial length of first scanner bore is less than second scanner bore
Axial length；
Bed board for carrying subject, and carries and can be moved to described the after the subject from second scanner bore
One scanner bore is moved to second scanner bore from first scanner bore；
Processor connects the CT scanner and/or the PET scanner, the CT images for obtaining subject, the CT figures
As scan data of the corresponding subject in the first scanner bore；According to the CT images, subject is obtained in each designated position
The equivalent mass at place；
Obtain settling amount that the unit mass of the equivalent mass of each specified location and each specified location causes it
Product, obtain the bed board each specified location subject settling amount；
According to the subject settling amount of each specified location and the bed board of each specified location dead weight settling amount, obtain
Total settlement of the bed board in each specified location.
9. system according to claim 8, which is characterized in that the processor is additionally operable to realize following operation：
The CT images are converted according to the total settlement of each specified location, obtain CT changing images；
The PET data of same subject is obtained, the PET data corresponds to scan data of the subject in the second scanner bore；
The PET image that PET data obtains subject is rebuild, and is based on the CT Transformation Graphs in the PET data reconstruction process
As carrying out correction for attenuation to the PET image.
10. a kind of computer readable storage medium, which is characterized in that including：Computer executable instructions, when the computer can
It executes instruction and executes method as described in any one of claim 1 to 7 when being run.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020122575A1 (en) * | 2001-01-10 | 2002-09-05 | Alexander Vaisburd | Sag correction |
| CN1572256A (en) * | 2003-06-04 | 2005-02-02 | 西门子公司 | Patient examination support system and method for adjusting its lying board |
| JP2005291814A (en) * | 2004-03-31 | 2005-10-20 | Shimadzu Corp | Diagnostic system |
| US20080289106A1 (en) * | 2007-05-23 | 2008-11-27 | Lukas Beyer | Automatically correcting the position of a patient support for a targeted irradiation of a patient |
| CN103796590A (en) * | 2012-06-20 | 2014-05-14 | 株式会社东芝 | Diagnostic imaging device and control method thereof |
| CN103876774A (en) * | 2013-11-21 | 2014-06-25 | 沈阳东软医疗系统有限公司 | Scanning table and method and device for compensating sinking of table board |
| CN106175810A (en) * | 2016-06-30 | 2016-12-07 | 上海联影医疗科技有限公司 | A kind of imaging device and method, PET/CT imaging device |
| CN106924886A (en) * | 2016-01-06 | 2017-07-07 | 上海联影医疗科技有限公司 | Correct the method and device of sick bed deflection |
| CN107403457A (en) * | 2017-07-28 | 2017-11-28 | 上海联影医疗科技有限公司 | Medical imaging procedure, equipment and multi-modal medical imaging procedure |
-
2018
- 2018-05-25 CN CN201810516649.7A patent/CN108652657B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020122575A1 (en) * | 2001-01-10 | 2002-09-05 | Alexander Vaisburd | Sag correction |
| CN1572256A (en) * | 2003-06-04 | 2005-02-02 | 西门子公司 | Patient examination support system and method for adjusting its lying board |
| JP2005291814A (en) * | 2004-03-31 | 2005-10-20 | Shimadzu Corp | Diagnostic system |
| US20080289106A1 (en) * | 2007-05-23 | 2008-11-27 | Lukas Beyer | Automatically correcting the position of a patient support for a targeted irradiation of a patient |
| CN103796590A (en) * | 2012-06-20 | 2014-05-14 | 株式会社东芝 | Diagnostic imaging device and control method thereof |
| CN103876774A (en) * | 2013-11-21 | 2014-06-25 | 沈阳东软医疗系统有限公司 | Scanning table and method and device for compensating sinking of table board |
| CN106924886A (en) * | 2016-01-06 | 2017-07-07 | 上海联影医疗科技有限公司 | Correct the method and device of sick bed deflection |
| CN106175810A (en) * | 2016-06-30 | 2016-12-07 | 上海联影医疗科技有限公司 | A kind of imaging device and method, PET/CT imaging device |
| CN107403457A (en) * | 2017-07-28 | 2017-11-28 | 上海联影医疗科技有限公司 | Medical imaging procedure, equipment and multi-modal medical imaging procedure |
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