CN108926356A - Detector photon reaches information and determines method, apparatus and Medical Devices - Google Patents
Detector photon reaches information and determines method, apparatus and Medical Devices Download PDFInfo
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Abstract
Information, which is reached, this application involves a kind of detector photon determines method, apparatus, Medical Devices and storage medium.The method includes：A virtual pixel is constructed between the adjacent real pixel of any preset quantity；When the signal amplitude of the virtual pixel is more than given threshold, the pixel centered on the acquisition maximum real pixel of signal amplitude in the adjacent real pixel and real pixel adjacent thereto of the preset quantity, using the position of the center pixel as photon in-position.The position that photon reaches can accurately be determined using this method, eliminate the interference of the electron cloud of photon generation, determine photon in-position more accurate, further can be improved image quality.
Description
Technical field
This application involves technical field of medical equipment, more particularly to a kind of detector photon reach information determine method,
Device, Medical Devices and storage medium.
Background technique
As the development of Medical Devices technology improves CT quantitative analysis, photon counting to reduce the dose of radiation of patient
Power spectrum CT technology is come into being.Photon counting power spectrum CT has material composition analytic function, and having can be reduced suffered by patient
Radiation the advantages that.Develop photon counting power spectrum CT, has become domestic and international academia and the next generation that industry is paid close attention to jointly
One of CT developing direction.X-ray sub-count detector (PCD) technology is the key that restrict photon counting power spectrum CT development.
In current traditional technology, in order to improve spatial resolution and meet clinical count requirement, X-ray sub-count detector
Pixel (pixel) size generally only have several hundred microns (100-300 μm).When detector pixel size is smaller, X-ray is produced
Raw electron cloud may lead to the photon in-position for the photon collected by detector collected by adjacent detector pixel
And photon arrival time by mistake judgement, and then influence image quality.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of spy that can accurately determine photon in-position
It surveys device photon arrival information and determines method, apparatus, Medical Devices and storage medium.
A kind of detector photon reaches information and determines method, the method includes：In the adjacent true of any preset quantity
A virtual pixel is constructed between real image element；When the signal amplitude of the virtual pixel is more than given threshold, described default
In the adjacent real pixel and real pixel adjacent thereto of quantity centered on the acquisition maximum real pixel of signal amplitude
Pixel, using the position of the center pixel as photon in-position.
One in the adjacent real pixel of the virtual pixel and the preset quantity in one of the embodiments,
With corresponding relationship；It is described when the signal amplitude of the virtual pixel be more than given threshold when, in the adjacent of the preset quantity
Real pixel and real pixel adjacent thereto in obtain pixel centered on the maximum real pixel of signal amplitude, will be described
The position of center pixel as photon in-position, including：It, will when the signal amplitude of the virtual pixel is more than given threshold
With real pixel of the virtual pixel with corresponding relationship and the phase centered on the real pixel with corresponding relationship
Adjacent multiple real pixels send request instruction as pixel to be compared, to the pixel to be compared；According to the request instruction point
The pixel to be compared real pixel adjacent thereto is not compared, the maximum real pixel of wherein signal amplitude is obtained and makees
For corresponding region center pixel；Multiple regions center pixel is compared, the maximum real pixel of wherein signal amplitude is obtained
Centered on pixel, using the position of the center pixel as photon in-position.
The preset quantity is four in one of the embodiments,；The right side of the virtual pixel and the virtual pixel
Real pixel at lower position has corresponding relationship.
The signal of the virtual pixel is the adjacent real pixel of the preset quantity in one of the embodiments,
Signal averaging.
It is described in one of the embodiments, to there is the real pixel of corresponding relationship and with the virtual pixel with described
Adjacent multiple real pixels centered on real pixel with corresponding relationship as pixel to be compared, including：It will be with the void
Intend real pixel of the pixel with corresponding relationship and adjacent eight centered on the real pixel with corresponding relationship true
Real image element is as pixel to be compared.
It is described respectively that the pixel to be compared is adjacent thereto according to the request instruction in one of the embodiments,
Real pixel is compared, including：According to the request instruction by the pixel to be compared it is independent with its own on, upper left,
Left and lower-left four real pixels are compared.
In one of the embodiments, the method also includes：The threshold time of crossing of the virtual pixel is labeled as photon
Arrival time.
A kind of detector photon arrival information determining means, described device include：Virtual pixel constructs module, in office
A virtual pixel is constructed between the adjacent real pixel for preset quantity of anticipating；Photon in-position determining module, for working as institute
When stating the signal amplitude of virtual pixel and being more than given threshold, in the adjacent real pixel of the preset quantity and adjacent thereto
Pixel centered on the acquisition maximum real pixel of signal amplitude in real pixel, using the position of the center pixel as photon
In-position.
A kind of Medical Devices, including memory and processor, the memory are stored with computer program, the processor
Following steps are realized when executing the computer program：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；
When the signal amplitude of the virtual pixel is more than given threshold, in the adjacent real pixel of the preset quantity
With in real pixel adjacent thereto obtain the maximum real pixel of signal amplitude centered on pixel, by the center pixel
Position is as photon in-position.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Following steps are realized when row：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；
When the signal amplitude of the virtual pixel is more than given threshold, in the adjacent real pixel of the preset quantity
With in real pixel adjacent thereto obtain the maximum real pixel of signal amplitude centered on pixel, by the center pixel
Position is as photon in-position.
Above-mentioned detector photon reaches information and determines method, apparatus, Medical Devices and storage medium, by arbitrarily default
Simulation pixel is constructed between the adjacent real pixel of quantity, when the signal amplitude of simulation pixel is more than given threshold, in structure
Pixel centered on the real pixel for obtaining amplitude maximum is built in the real pixel real pixel adjacent with its of virtual pixel,
The position of middle center pixel is photon in-position.By comparing the signal amplitude of multiple real pixels, and by amplitude maximum
Real pixel position is as photon in-position.It can accurately determine the position that photon reaches, eliminate the electricity of photon generation
The interference of sub- cloud determines photon in-position more accurate, further can be improved image quality.
Detailed description of the invention
Fig. 1 is that detector photon reaches the flow diagram that information determines method in one embodiment；
Fig. 2 is that detector photon reaches the flow diagram that information determines method in another embodiment；
Fig. 3 is that detector photon reaches the flow diagram that information determines method in another embodiment；
Fig. 4 is real pixel and virtual pixel schematic diagram in one embodiment；
Fig. 5 is that the photon arrival information that a real pixel receives photon in one embodiment determines schematic diagram；
Fig. 6 is that the photon arrival information that multiple real pixels receive photon in one embodiment determines schematic diagram；
Fig. 7 is the structural block diagram that detector photon reaches information determining means in one embodiment；
Fig. 8 is the structural block diagram of photon in-position determining module in one embodiment；
Fig. 9 is the internal structure chart of Medical Devices in one embodiment.
Appended drawing reference：100 be detector photon reach information determining means, 110 be virtual pixel building module, 120 be
Photon in-position determining module, 121 be corresponding relationship determination unit, 122 be pixel value determining unit to be compared, 123 be to compare
Unit, 124 be photon in-position determination unit, 130 be photon arrival time determining module.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
In one embodiment, method is determined as shown in Figure 1, providing a kind of detector photon and reaching information, including with
Lower step：
Step S102 constructs a virtual pixel between the adjacent real pixel of any preset quantity.
Specifically, the ray detector in Medical Devices is a kind of device that the energy of ray is converted to electric signal.It visits
It surveys device and receives radiation exposure, and the radiation intensity of ray is converted into electric signal, Medical Devices generate image by electric signal.
Wherein detector is made of multiple real pixels.Wherein each real pixel can receive radiation exposure, and by ray
Radiation intensity be converted into electric signal.The virtual representation that virtual pixel constructs between the adjacent real pixel of any preset quantity
Element, the wherein real pixel of preset quantity adjacent formation rectangle two-by-two.
Step S104, when the signal amplitude of virtual pixel is more than given threshold, in the adjacent true picture of preset quantity
Pixel centered on the acquisition maximum real pixel of signal amplitude in plain and adjacent thereto real pixel, by the position of center pixel
It sets as photon in-position.
Specifically, the signal of real pixel is the electric signal that the radiation intensity of ray is converted by real pixel.Virtual representation
The signal of element is the Signal averaging of the adjacent real pixel of preset quantity.Namely the preset quantity of building virtual pixel is true
The superposition of the electric signal of pixel.By the way that virtual pixel signal threshold value appropriate is arranged, it can accurately determine that ray photons reach
The time of real pixel carries out the determination of position again in correct time, and the determination of position can be made more accurate.Work as void
When the signal amplitude of quasi- pixel is more than given threshold, that is, in the moment of ray photons arrival real pixel, constructing virtually
In the real pixel of the pixel real pixel adjacent with its, pixel centered on the maximum real pixel of signal amplitude is searched, in
The position of imago element is exactly the in-position of photon.
Above-mentioned detector photon reaches information and determines in method, in true adjacent with its of the real pixel of building virtual pixel
In real image element, in-position of the position of the maximum real pixel of signal amplitude as photon is searched.Real pixel is receiving light
The photon cloud that son is formed generates electric signal, since the electron cloud that photon is formed may be absorbed by multiple real pixels simultaneously, and
The position of the real pixel of amplitude maximum in multiple real pixels is chosen as photon in-position, the arrival position of photon can be made
It sets determining more accurate.
In one embodiment, method is determined as shown in Fig. 2, providing a kind of detector photon and reaching information, including with
Lower step：
Step S202 constructs a virtual pixel between the adjacent real pixel of any preset quantity.
Specifically, the matrix that the detector of Medical Devices is made of multiple real pixels.Wherein each real pixel
Radiation exposure can be received, and the radiation intensity of ray is converted into electric signal.Virtual pixel is the phase of any preset quantity
The virtual pixel constructed between adjacent real pixel, the wherein real pixel of preset quantity adjacent formation rectangle two-by-two.
Virtual pixel is crossed threshold time label when the signal amplitude of virtual pixel is more than given threshold by step S204
For photon arrival time.
Specifically, real pixel receives radiation exposure, and the radiation intensity of ray is converted into electric signal.It will construct virtual
The signal of the real pixel of the preset quantity of pixel is overlapped, and obtains the signal of virtual pixel.And utilize the letter of virtual pixel
Number amplitude judges that ray photons reach the time of real pixel.When the signal of virtual pixel is more than preset threshold value, then
It will be more than the time of given threshold as photon arrival time.
Step S206 obtains signal amplitude in the adjacent real pixel and real pixel adjacent thereto of preset quantity
Pixel centered on maximum real pixel, using the position of center pixel as photon in-position.
Specifically, when the signal amplitude of virtual pixel is more than given threshold, and marking the signal of virtual pixel is more than threshold value
Time be photon arrival time after, in the real pixel real pixel adjacent with its of building virtual pixel, lookup signal
The position of pixel centered on the real pixel of amplitude maximum, center pixel is exactly the in-position of photon.
Above-mentioned detector photon reaches information and determines in method, and the signal for constructing the real pixel of virtual pixel is folded
Add the signal for obtaining virtual pixel, is determined to make photon arrival time using the signal progress photon arrival time of virtual pixel
Determination it is more accurate.When the signal of virtual pixel is more than threshold value, the signal of real pixel is also in rising edge at this time, when
When the signal of virtual pixel compares more than the signal for carrying out real pixel after threshold value, the signal of real pixel reaches amplitude at this time,
It ensure that the accuracy of comparison result, determination photon arrival time that can be more accurate and photon in-position.
In one embodiment, method, virtual representation are determined as shown in figure 3, providing a kind of detector photon and reaching information
Element can be with any one in the real pixel of building virtual pixel with corresponding relationship.Specifically can be：Virtual pixel
There is corresponding relationship with the real pixel at the bottom-right location of virtual pixel；At the upper-right position of virtual pixel and virtual pixel
Real pixel has corresponding relationship；The real pixel of the lower left position of virtual pixel and virtual pixel has corresponding relationship；It is empty
Real pixel at quasi- pixel and the top-left position of virtual pixel has corresponding relationship.Wherein corresponding relationship is for determining that photon arrives
When up to position, the real pixel to virtual pixel with corresponding relationship and the phase centered on the real pixel with corresponding relationship
Adjacent multiple real pixels send request instruction.Detector photon reaches information and determines that method includes the following steps：
Step S302 constructs a virtual pixel between the adjacent real pixel of any preset quantity.
Specifically, the ray detector in Medical Devices is a kind of device that the energy of ray is converted to electric signal.It visits
It surveys device and receives radiation exposure, and the radiation intensity of ray is converted into electric signal, Medical Devices generate image by electric signal.
The wherein matrix that detector is made of multiple real pixels.Wherein each real pixel can receive radiation exposure, and
The radiation intensity of ray is converted into electric signal.What virtual pixel constructed between the adjacent real pixel of any preset quantity
Virtual pixel.More specifically, preset quantity is four, that is, virtual pixel is the adjacent real pixel building of any four
Virtual pixel.The wherein real pixel of preset quantity adjacent formation rectangle namely four adjacent two two-phases of real pixel two-by-two
Neighbour surrounds rectangle.
Virtual pixel is crossed threshold time label when the signal amplitude of virtual pixel is more than given threshold by step S304
For photon arrival time, and by the real pixel with virtual pixel with corresponding relationship and with the real pixel with corresponding relationship
Centered on adjacent multiple real pixels as pixel to be compared, send request instruction to pixel to be compared.
Specifically, real pixel receives radiation exposure, and the radiation intensity of ray is converted into electric signal.It will construct virtual
The signal of the real pixel of the preset quantity of pixel is overlapped, and obtains the signal of virtual pixel.And utilize the letter of virtual pixel
Number amplitude judges that ray photons reach the time of real pixel.When the signal of virtual pixel is more than preset threshold value, then
It will be more than the time of given threshold as photon arrival time.It, will when the signal of virtual pixel is more than preset threshold value
Real pixel with virtual pixel with corresponding relationship and adjacent true centered on the real pixel with corresponding relationship
Pixel sends request instruction as pixel to be compared, to pixel to be compared.
Wherein the adjacent real pixel centered on the real pixel with corresponding relationship be with corresponding relationship
Adjacent eight real pixel centered on real pixel.More specifically can be：When the bottom right of virtual pixel and virtual pixel
When real pixel at position has corresponding relationship, by eight adjacent with its of the real pixel at the bottom-right location of virtual pixel
Real pixel is as pixel to be compared；Real pixel at the upper-right position of virtual pixel and virtual pixel has corresponding relationship
When, eight real pixels that the real pixel at the upper-right position of virtual pixel is adjacent with its are as pixel to be compared；Work as void
When the real pixel of the lower left position of quasi- pixel and virtual pixel has corresponding relationship, by the lower left position of virtual pixel
Real pixel eight real pixels adjacent with its are as pixel to be compared；At the top-left position of virtual pixel and virtual pixel
Real pixel have corresponding relationship when, by the eight true pictures adjacent with its of the real pixel at the top-left position of virtual pixel
Element is used as pixel to be compared.Request instruction is for controlling each pixel to be compared for the signal of current real pixel and adjacent true
The signal of real image element is compared.
Pixel to be compared real pixel adjacent thereto is compared respectively according to request instruction, obtains by step S306
Wherein the maximum real pixel of signal amplitude is as corresponding region center pixel.
Specifically, after pixel to be compared receives request instruction, each pixel to be compared independently with its phase
Adjacent real pixel carries out the comparison of signal amplitude, and chooses a signal amplitude in the comparison domain of each pixel to be compared
Maximum real pixel is used as corresponding region center pixel.
When real pixel at the bottom-right location of virtual pixel and virtual pixel has corresponding relationship, by virtual pixel
Real pixel at bottom-right location eight real pixels adjacent with its are as pixel to be compared, by each pixel to be compared point
It is not independent on its own, upper left, a left side, lower left position four real pixels carry out signal amplitude compared with, and at each
Comparison domain one signal amplitude maximum real pixel of selection of pixel to be compared is used as corresponding region center pixel.
When real pixel at the upper-right position of virtual pixel and virtual pixel has corresponding relationship, by virtual pixel
Real pixel at upper-right position eight real pixels adjacent with its are as pixel to be compared, by each pixel to be compared point
It is not independent under its own, lower-left, a left side, top-left position four real pixels carry out signal amplitude compared with, and at each
Comparison domain one signal amplitude maximum real pixel of selection of pixel to be compared is used as corresponding region center pixel.
When the real pixel of virtual pixel and the lower left position of virtual pixel has corresponding relationship, by virtual pixel
The real pixel of lower left position eight real pixels adjacent with its are as pixel to be compared, by each pixel to be compared point
It is not independent on its own, upper right, the right side, bottom-right location four real pixels carry out signal amplitude compared with, and at each
Comparison domain one signal amplitude maximum real pixel of selection of pixel to be compared is used as corresponding region center pixel.
When real pixel at the top-left position of virtual pixel and virtual pixel has corresponding relationship, by virtual pixel
Real pixel at top-left position eight real pixels adjacent with its are as pixel to be compared, by each pixel to be compared point
It is not independent under its own, bottom right, the right side, upper-right position four real pixels carry out signal amplitude compared with, and at each
Comparison domain one signal amplitude maximum real pixel of selection of pixel to be compared is used as corresponding region center pixel.
Multiple regions center pixel is compared by step S308, is obtained the maximum real pixel of wherein signal amplitude and is made
For center pixel, using the position of center pixel as photon in-position.
Specifically, adjacent thereto four real pixel of each pixel to be compared independently is compared, will be every
The maximum real pixel of signal amplitude is as corresponding region center pixel in the comparison domain of one pixel to be compared.By multiple phases
Answer regional center pixel to be compared again, using the maximum real pixel of signal amplitude in multiple corresponding region center pixels as
Center pixel, the wherein position where center pixel, that is, photon in-position.
More specifically, the real pixel with virtual pixel with corresponding relationship and with the real pixel with corresponding relationship it is
Adjacent eight real pixel at center is as pixel to be compared, each pixel to be compared independently adjacent thereto true
Pixel is compared, and nine corresponding region center pixels is obtained, then nine corresponding region center pixels are compared, by nine
Position, that is, photon of pixel centered on the maximum real pixel of signal amplitude in corresponding region center pixel, center pixel reaches
Position.
Above-mentioned detector photon reaches information and determines in method, can will acquire for the processor of real pixel true
The signal of pixel is transmitted to the processor of Medical Devices, has the processor of the real pixel of corresponding relationship by structure with virtual pixel
The Signal averaging for building the real pixel of virtual pixel obtains virtual pixel signal, and virtual pixel signal is transmitted to medical treatment and is set
Standby processor.The processor of Medical Devices judges whether virtual pixel signal is more than given threshold, when virtual pixel signal is super
When crossing given threshold, using signal amplitude be more than given threshold time as photon arrival time, and the processing of Medical Devices
Device sends request instruction, the place of the corresponding real pixel of pixel to be compared to the processor of the corresponding real pixel of pixel to be compared
After reason device is connected to request instruction, the real pixel adjacent with its own of each pixel to be compared independently is compared
It is compared to obtain signal to the maximum corresponding region center pixel of multiple signal amplitudes, then by multiple corresponding region center pixels
The center pixel of amplitude maximum, using the position of center pixel as photon in-position.
Or the signal of real pixel that will acquire of the processor of real pixel is transmitted to the processing of Medical Devices
Device, the processor of Medical Devices will construct the Signal averaging of the real pixel of virtual pixel, obtain virtual pixel signal, judge void
Whether quasi- picture element signal is more than given threshold, is more than setting threshold by signal amplitude when virtual pixel signal is more than given threshold
The time of value as photon arrival time, and the processor of Medical Devices by each pixel to be compared independently and its
Itself adjacent real pixel is compared to obtain the maximum corresponding region center pixel of multiple signal amplitudes, then will be multiple corresponding
Regional center pixel is compared to obtain the maximum center pixel of signal amplitude, reaches position for the position of center pixel as photon
It sets.That is detector photon reaches information and determines that method can be run in the processor of a Medical Devices completely,
It can cooperate and complete by the processor of real pixel and the processor of Medical Devices.Processor of the present embodiment to operation
It is not specifically limited, only needs that above-mentioned calculation method can be completed.
Above-mentioned detector photon reaches information and determines method, and threshold time can be crossed according to virtual pixel and accurately determines photon
Arrival time.And by comparing signal amplitude, pixel centered on the real pixel of the number of winning the confidence amplitude maximum, with center pixel
Position can accurately determine the position that photon reaches as photon in-position, eliminate the dry of the electron cloud of photon generation
It disturbs, determines photon in-position more accurate, further can be improved image quality.
As shown in figure 4, provide the schematic diagram of a kind of virtual pixel and real pixel, wherein each Pixel (pixel)
Represent a real pixel.A virtual pixel is configured between Pixel1, Pixel2, Pixel3 and Pixel4 in figure.
The signal of virtual pixel is the superposition of the signal of the signal of Pixel1, the signal of Pixel2, the signal of Pixel3 and Pixel4.
If final calculation result is that Pixel4 is center pixel, the position of this real pixel of Pixel4 is the arrival of photon
Position.
As shown in figure 5, the electron cloud for providing photon generation works as light by a received location determining method of real pixel
The electron cloud 100% that son generates is received by No. 13 real pixels, and signal amplitude is more than the virtual pixel packet of given threshold at this time
It includes：7,8,12, No. 13 real pixels building virtual pixel, 8,9,13, No. 14 real pixels building virtual pixel, 12,13,
17, the virtual pixel of No. 18 real pixels building, the virtual pixel of 13,14,18, No. 19 real pixels building.With virtual pixel
Illustrate for there is corresponding relationship with the real pixel at the bottom-right location of virtual pixel.Then No. 13 real pixels are corresponding virtual
Pixel, the corresponding virtual pixel of No. 14 real pixels, the corresponding virtual pixel of No. 18 real pixels, No. 19 real pixels are corresponding
Virtual pixel signal amplitude is more than given threshold.It is arrived what the pixel to be compared of virtual pixel real pixel adjacent thereto compared
Regional center pixel, then regional center pixel is compared to obtain No. 13 real pixels to be center pixel, it is final to determine No. 13
Real pixel position is photon in-position, and the signal amplitude of virtual pixel is more than to reach for photon the time of given threshold
Time.
As shown in fig. 6, the electron cloud for providing photon generation works as light by the received location determining method of multiple real pixels
The electron cloud 50% that son generates is received by No. 13 real pixels, 20% is received by No. 14 real pixels, 10% true by No. 18
Real image element receives, 20% is received by No. 19 real pixels.The virtual pixel for receiving photon at this time includes：7,8,12,13
The virtual pixel of number real pixel building receives the 50% of photon-electron cloud, the virtual representation of 8,9,13, No. 14 real pixels building
Element receives the 70% of photon-electron cloud, and the virtual pixel of 9,10,14, No. 15 real pixel buildings receives photon-electron cloud
20%, the virtual pixel of 12,13,17, No. 18 real pixel buildings receives the 60% of photon-electron cloud, and 13,14,18, No. 19 true
The virtual pixel of real image element building receives the 100% of photon-electron cloud, the virtual pixel of 14,15,19, No. 20 real pixels building
The 40% of photon-electron cloud is received, the virtual pixel of 17,18,22, No. 23 real pixel buildings receives the 10% of photon-electron cloud,
18, the virtual pixel of 19,23, No. 24 real pixel buildings receives the 30% of photon-electron cloud, 19,20,24, No. 25 real pixels
The virtual pixel of building receives the 20% of photon-electron cloud.Wherein signal amplitude is more than that the virtual pixel of given threshold includes：8,
9, the virtual pixel of 13, No. 14 real pixel buildings receives the 70% of photon-electron cloud, 12,13,17, No. 18 real pixel buildings
Virtual pixel receive the 60% of photon-electron cloud, the virtual pixel of 13,14,18, No. 19 real pixels building receives photon electricity
The 100% of sub- cloud.Illustrate so that the real pixel at the bottom-right location of virtual pixel and virtual pixel has corresponding relationship as an example.Then
The corresponding virtual pixel of No. 14 real pixels, the corresponding virtual pixel of No. 18 real pixels, No. 19 real pixels are corresponding virtual
Picture element signal amplitude is more than given threshold.By the pixel to be compared of virtual pixel real pixel adjacent thereto compare to region
Center pixel, then regional center pixel is compared to obtain No. 13 real pixels to be center pixel, final determining No. 13 are true
Pixel position is photon in-position, and the signal amplitude of virtual pixel is more than when reaching for photon the time of given threshold
Between.
It should be understood that although each step in the flow chart of Fig. 1-3 is successively shown according to the instruction of arrow,
These steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, these steps can execute in other order.Moreover, at least one in Fig. 1-3
Part steps may include that perhaps these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, the execution sequence in these sub-steps or stage is also not necessarily successively
It carries out, but can be at least part of the sub-step or stage of other steps or other steps in turn or alternately
It executes.
In one embodiment, as shown in fig. 7, providing a kind of detector photon arrival information determining means 100, packet
It includes：Virtual pixel constructs module 110, photon in-position determining module 120 and photon arrival time determining module 130,
In：
Virtual pixel constructs module 110, for constructing a void between the adjacent real pixel in any preset quantity
Quasi- pixel.
Photon in-position determining module 120, for presetting when the signal amplitude of virtual pixel is more than given threshold
In the adjacent real pixel and real pixel adjacent thereto of quantity centered on the acquisition maximum real pixel of signal amplitude
Pixel, using the position of center pixel as photon in-position.
Photon arrival time determining module 130, for the threshold time of crossing of virtual pixel to be labeled as photon arrival time.
As shown in figure 8, providing the structural block diagram of photon in-position determining module 120, wherein photon in-position is true
Cover half block 120 includes：Corresponding relationship determination unit 121, pixel value determining unit to be compared 122, comparing unit 123 and photon arrive
Up to position determination unit 124.
Corresponding relationship determination unit 121, one in adjacent real pixel for determining virtual pixel and preset quantity
It is a that there is corresponding relationship.
Pixel value determining unit 122 to be compared, for when the signal amplitude of virtual pixel be more than given threshold when, will with it is virtual
Real pixel of the pixel with corresponding relationship and adjacent multiple real pixels centered on the real pixel with corresponding relationship
As pixel to be compared, request instruction is sent to pixel to be compared.
Comparing unit 123, for respectively being compared pixel to be compared real pixel adjacent thereto according to request instruction
Compared with obtaining the maximum real pixel of wherein signal amplitude as corresponding region center pixel.
Photon in-position determination unit 124 obtains wherein signal width for multiple regions center pixel to be compared
It is worth pixel centered on maximum real pixel, using the position of center pixel as photon in-position.
Pixel value determining unit 122 to be compared is also used to by the real pixel with virtual pixel with corresponding relationship and with tool
There are adjacent eight real pixels centered on the real pixel of corresponding relationship as pixel to be compared.
Comparing unit 123, be also used to according to request instruction by pixel to be compared it is independent with its own on, upper left, Zuo He
Four pixels of lower-left are compared.
The specific restriction for reaching information determining means 100 about detector photon may refer to above for detector light
Son reaches the restriction that information determines method, and details are not described herein.Above-mentioned detector photon reaches each in information determining means 100
A module can be realized fully or partially through software, hardware and combinations thereof.Above-mentioned each module can be embedded in the form of hardware or
Independently of in the processor in Medical Devices, can also be stored in a software form in the memory in Medical Devices, in order to
Processor, which calls, executes the corresponding operation of the above modules.
In one embodiment, a kind of Medical Devices are provided, which can be ray detector, inside
Structure chart can be as shown in Figure 9.The Medical Devices include the processor connected by system bus, memory, network interface, show
Display screen and input unit.Wherein, the processor of the Medical Devices is for providing calculating and control ability.The storage of the Medical Devices
Device includes non-volatile memory medium, built-in storage.The non-volatile memory medium is stored with operating system and computer program.
The built-in storage provides environment for the operation of operating system and computer program in non-volatile memory medium.The Medical Devices
Network interface be used to communicate with external terminal by network connection.To realize one when the computer program is executed by processor
Kind detector photon reaches information and determines method.The display screen of the Medical Devices can be liquid crystal display or electric ink is aobvious
Display screen, the input unit of the Medical Devices can be the touch layer covered on display screen, be also possible to set on Medical Devices shell
Key, trace ball or the Trackpad set can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Fig. 9, only part relevant to application scheme is tied
The block diagram of structure, does not constitute the restriction for the Medical Devices being applied thereon to application scheme, and specific Medical Devices can be with
Including than more or fewer components as shown in the figure, perhaps combining certain components or with different component layouts.
In one embodiment, a kind of Medical Devices, including memory and processor are provided, is stored with meter in memory
Calculation machine program, the processor realize following steps when executing computer program：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；When the signal width of virtual pixel
When value is more than given threshold, signal amplitude is obtained in the adjacent real pixel and real pixel adjacent thereto of preset quantity
Pixel centered on maximum real pixel, using the position of center pixel as photon in-position.
In one embodiment, following steps are also realized when processor executes computer program：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；When the signal width of virtual pixel
When value is more than given threshold, the threshold time of crossing of virtual pixel is labeled as photon arrival time；In the adjacent true of preset quantity
Pixel centered on the acquisition maximum real pixel of signal amplitude in real image element and real pixel adjacent thereto, by center pixel
Position as photon in-position.
In one embodiment, following steps are also realized when processor executes computer program：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；Virtual pixel and preset quantity
Adjacent real pixel in one have corresponding relationship；It, will be empty when the signal amplitude of virtual pixel is more than given threshold
The threshold time of crossing of quasi- pixel is labeled as photon arrival time, and by the real pixel with virtual pixel with corresponding relationship and with tool
There are adjacent multiple real pixels centered on the real pixel of corresponding relationship as pixel to be compared, is asked to pixel to be compared transmission
Ask instruction；Pixel to be compared real pixel adjacent thereto is compared respectively according to request instruction, obtains wherein signal width
It is worth maximum real pixel as corresponding region center pixel；Multiple regions center pixel is compared, wherein signal is obtained
Pixel centered on the real pixel of amplitude maximum, using the position of center pixel as photon in-position.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program realizes following steps when being executed by processor：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；When the signal width of virtual pixel
When value is more than given threshold, signal amplitude is obtained in the adjacent real pixel and real pixel adjacent thereto of preset quantity
Pixel centered on maximum real pixel, using the position of center pixel as photon in-position.
In one embodiment, following steps are also realized when computer program is executed by processor：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；When the signal width of virtual pixel
When value is more than given threshold, the threshold time of crossing of virtual pixel is labeled as photon arrival time；In the adjacent true of preset quantity
Pixel centered on the acquisition maximum real pixel of signal amplitude in real image element and real pixel adjacent thereto, by center pixel
Position as photon in-position.
In one embodiment, following steps are also realized when computer program is executed by processor：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；Virtual pixel and preset quantity
Adjacent real pixel in one have corresponding relationship；It, will be empty when the signal amplitude of virtual pixel is more than given threshold
The threshold time of crossing of quasi- pixel is labeled as photon arrival time, and by the real pixel with virtual pixel with corresponding relationship and with tool
There are adjacent multiple real pixels centered on the real pixel of corresponding relationship as pixel to be compared, is asked to pixel to be compared transmission
Ask instruction；Pixel to be compared real pixel adjacent thereto is compared respectively according to request instruction, obtains wherein signal width
It is worth maximum real pixel as corresponding region center pixel；Multiple regions center pixel is compared, wherein signal is obtained
Pixel centered on the real pixel of amplitude maximum, using the position of center pixel as photon in-position.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Instruct relevant hardware to complete by computer program, computer program to can be stored in a non-volatile computer readable
It takes in storage medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, this Shen
Please provided by any reference used in each embodiment to memory, storage, database or other media, may each comprise
Non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of detector photon reaches information and determines method, which is characterized in that the method includes：
A virtual pixel is constructed between the adjacent real pixel of any preset quantity；
When the signal amplitude of the virtual pixel be more than given threshold when, the preset quantity adjacent real pixel and with
Pixel centered on the acquisition maximum real pixel of signal amplitude in its adjacent real pixel, by the position of the center pixel
As photon in-position.
2. the method according to claim 1, wherein true adjacent with the preset quantity of the virtual pixel
One in real image element has corresponding relationship；
It is described when the signal amplitude of the virtual pixel be more than given threshold when, in the adjacent real pixel of the preset quantity
With in real pixel adjacent thereto obtain the maximum real pixel of signal amplitude centered on pixel, by the center pixel
Position as photon in-position, including：
When the signal amplitude of the virtual pixel is more than given threshold, will there is the true of corresponding relationship with the virtual pixel
Pixel and adjacent multiple real pixels using centered on the real pixel with corresponding relationship are as pixel to be compared, to institute
It states pixel to be compared and sends request instruction；
The pixel to be compared real pixel adjacent thereto is compared respectively according to the request instruction, wherein being believed
The real pixel of number amplitude maximum is as corresponding region center pixel；
Multiple regional center pixels are compared, picture centered on the maximum real pixel of wherein signal amplitude is obtained
Element, using the position of the center pixel as photon in-position.
3. according to the method described in claim 2, it is characterized in that, the preset quantity is four；The virtual pixel and institute
Stating the real pixel at the bottom-right location of virtual pixel has corresponding relationship.
4. according to the method described in claim 3, it is characterized in that, the signal of the virtual pixel is the phase of the preset quantity
The Signal averaging of adjacent real pixel.
5. according to the method described in claim 4, it is characterized in that, described will have the true of corresponding relationship with the virtual pixel
Real image element and adjacent multiple real pixels using centered on the real pixel with corresponding relationship are wrapped as pixel to be compared
It includes：
In being with real pixel of the virtual pixel with corresponding relationship and with the real pixel with corresponding relationship
Adjacent eight real pixels of the heart are as pixel to be compared.
6. according to method described in claim 3 to 5 any one, which is characterized in that described to be distinguished according to the request instruction
The pixel to be compared real pixel adjacent thereto is compared, including：
According to the request instruction by independent four with its own upper, upper left, a left side and lower-left of the pixel to be compared really
Pixel is compared.
7. the method according to claim 1, wherein the method also includes：
The threshold time of crossing of the virtual pixel is labeled as photon arrival time.
8. a kind of detector photon reaches information determining means, which is characterized in that described device includes：
Virtual pixel constructs module, for constructing a virtual pixel between the adjacent real pixel in any preset quantity；
Photon in-position determining module, for when the signal amplitude of the virtual pixel be more than given threshold when, described pre-
If being obtained in the adjacent real pixel and real pixel adjacent thereto of quantity in the maximum real pixel conduct of signal amplitude
Imago element, using the position of the center pixel as photon in-position.
9. a kind of Medical Devices, including memory and processor, the memory are stored with computer program, which is characterized in that
The step of processor realizes any one of claims 1 to 7 the method when executing the computer program.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method described in any one of claims 1 to 7 is realized when being executed by processor.
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| CN108926356B (en) | 2022-03-25 |
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