CN112006713B - Dynamic reconstruction, scan object positioning, count rate display method and PET scanning device - Google Patents
Dynamic reconstruction, scan object positioning, count rate display method and PET scanning device Download PDFInfo
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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
- A61B6/03—Computerised tomographs
- A61B6/037—Emission tomography
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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
- A61B6/04—Positioning of patients; Tiltable beds or the like
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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
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4241—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using energy resolving detectors, e.g. photon counting
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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
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4266—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a plurality of detector units
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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
- A61B6/46—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with special arrangements for interfacing with the operator or the patient
- A61B6/461—Displaying means of special interest
- A61B6/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
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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
- A61B6/52—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
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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
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5294—Devices using data or image processing specially adapted for radiation diagnosis involving using additional data, e.g. patient information, image labeling, acquisition parameters
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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
- A61B6/54—Control of apparatus or devices for radiation diagnosis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/003—Reconstruction from projections, e.g. tomography
- G06T11/005—Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
Abstract
The application relates to a dynamic reconstruction, scan object positioning, count rate display method and PET scanning equipment. The method comprises the following steps: acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area; displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area; displaying a second corresponding relation conforming to the event counting rate and the acquisition time in a second display area; determining dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and the second corresponding relation; and dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters. The method can accurately and dynamically reconstruct the acquired scanning data of the scanning object according to the determined dynamic reconstruction framing parameters, and improves the image quality of the reconstructed image.
Description
Technical Field
The application relates to the technical field of medical imaging, in particular to a dynamic reconstruction, scan object positioning, count rate display method and PET scanning equipment.
Background
Positron emission tomography (Positron Emission Tomography, PET) is a noninvasive nuclear medicine imaging diagnostic technique that is widely used clinically. The PET count rate is the number of events received per unit time. If no scanner is scanning, a high count rate indicates the possible presence of a radioactive source or a radioactive contaminant; a low count rate indicates abnormal detector performance when a scanner is scanning or no radiation source is present.
In the prior art, a digital data processor (Digital Data Processor, DDP) of the PET system can display the total count rate of the PET system, and assist a doctor in judging whether a radioactive source exists in a scanning area or not and judging the moving range of a scanner according to the total count rate of the PET system.
However, the conventional PET scanning apparatus has a problem in that it is impossible to view a dynamic state of a counting rate of a detecting unit in real time in a divided region, to determine a dynamic reconstruction framing parameter according to the dynamic state of the counting rate of the detecting unit, and to determine a position of a scanning object according to the dynamic state of the counting rate of the detecting unit.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a count rate display method, a method for dynamic reconstruction and scan object positioning based on display contents, and a PET scanning apparatus.
A PET dynamic reconstruction method applied to a PET scanning device, the PET scanning device comprising a plurality of detection units, each detection unit comprising a plurality of annularly arranged detection modules, the detection units being for acquiring scan data of a scanned object, the method comprising:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in the first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in the second display area;
determining a dynamic reconstruction framing parameter of the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation;
and dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters.
In one embodiment, the first display area includes a plurality of histograms, different histograms representing coincidence event count rates for different detection units;
the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
In one embodiment, the plurality of histograms are each of different colors;
the colors of the curves are different.
In one embodiment, the method further comprises:
obtaining a zooming operation instruction based on the second display area;
and in the second display area, scaling the sizes of the curves according to the scaling operation instruction.
In the PET dynamic reconstruction method, the PET scanning equipment can accurately determine the dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation between the coincidence event counting rate of the detection unit and/or the second corresponding relation between the coincidence event counting rate of the detection unit and the acquisition time, so that the PET scanning equipment can accurately and dynamically reconstruct the acquired scanning data of the scanning object according to the determined dynamic reconstruction framing parameters, and the image quality of a reconstructed image is improved.
A PET scan object positioning method applied to a PET scan apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules, the detection units being for acquiring scan data of a scan object, the method comprising:
Acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in the first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in the second display area;
and adjusting the position of the scanning object in the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation.
In one embodiment, the first display area includes a plurality of histograms, different histograms representing coincidence event count rates for different detection units;
the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
In one embodiment, the plurality of histograms are each of different colors; the colors of the curves are different.
The PET scanning object positioning method can enable a user to determine the position of the scanning object in the PET scanning device according to the display content of the display interface.
A PET count rate display method applied to a PET scanning apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules, the detection units being configured to acquire scan data of a scan object, the method comprising:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in the first display area;
and displaying a second corresponding relation conforming to the event counting rate and the acquisition time in the second display area.
In one embodiment, the first display area includes a plurality of histograms, different histograms representing coincidence event count rates of different detection units, the plurality of histograms each having a different color;
the second display area comprises a plurality of curves, each curve represents the time-dependent change distribution of the coincidence event count rate of different detection units, and the colors of the plurality of curves are different.
According to the PET counting rate display method, the counting rate of the PET scanning equipment can be displayed according to the detection unit, display information of a display interface is increased, and the interactivity of the PET scanning equipment is improved.
A PET scanning device, the PET scanning device comprising:
the device comprises a plurality of detection units, a plurality of detection units and a plurality of detection units, wherein each detection unit comprises a plurality of detection modules which are annularly arranged, and the detection units are used for acquiring scanning data of a scanning object;
the display interface comprises a first display area and a second display area, wherein a first corresponding relation between the coincidence event counting rate and the detection unit is displayed in the first display area, and a second corresponding relation between the coincidence event counting rate and the acquisition time is displayed in the second display area;
the control unit is used for sending the first corresponding relation and the second corresponding relation to a display interface and adjusting the position of a scanning object in the PET scanning equipment;
and the reconstruction unit is used for dynamically reconstructing the scanning data.
The PET scanning equipment can realize the PET counting rate display, the PET dynamic reconstruction and the PET scanning object positioning.
Drawings
FIG. 1 is an application environment diagram of a dynamic reconstruction, scan object positioning, count rate display method in one embodiment;
FIG. 2 is a flow chart of a method of dynamic reconstruction of PET in one embodiment;
FIG. 3 is a schematic diagram of a display interface of a PET scanning device in one embodiment;
FIG. 3a is a schematic diagram of a count rate distribution of a uniform rod source or water pattern in one embodiment;
FIG. 4 is a flow chart of a method for dynamic reconstruction of PET in another embodiment;
FIG. 5 is a flow chart of a method of positioning a PET scan object in one embodiment;
FIG. 6 is a flow chart of a method of displaying PET count rate in one embodiment;
FIG. 7 is a block diagram of a PET dynamic reconstruction device in one embodiment;
FIG. 8 is a block diagram of a PET scan object positioning device in one embodiment;
FIG. 9 is a block diagram of a PET count rate display device in one embodiment;
fig. 10 is an internal structural view of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The PET dynamic reconstruction method, the PET scanning object positioning method and the PET counting rate display method provided by the embodiment of the application can be applied to the PET scanning equipment shown in figure 1. The PET scanning device comprises a plurality of detection units, a processor, a memory, a network interface, a display screen and an input device which are connected through a bus. The plurality of detection units of the PET scanning equipment are used for scanning all parts of the object to be detected and detecting data of all the parts. The processor of the PET scanning device is used to provide computing and control capabilities. The memory of the PET scanning device includes a non-volatile storage medium and an internal memory. The nonvolatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the PET scanning device is used for communicating with an external terminal through network connection. The computer program when executed by the processor is used for realizing a PET dynamic reconstruction method, a PET scanning object positioning method and a PET counting rate display method. The display screen of the PET scanning equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the PET scanning equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the PET scanning equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
In one embodiment, as shown in fig. 2, there is provided a PET dynamic reconstruction method applied to a PET scanning apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules for acquiring scan data of a scan object, the method comprising the steps of:
s201, acquiring coincidence event count rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
Specifically, after obtaining the scan data of each detection unit, the PET scanning device may process the scan data of each detection unit within each preset period of time, so as to obtain the coincidence event count rate of at least two detection units, and display the obtained coincidence event count rate on the display interface. The display interface comprises a first display area and a second display area. Alternatively, after the PET scanning device is started, all the detecting units may start scanning, or some detecting units may start scanning, but at least two detecting units start scanning. Optionally, the scanning interface integrates the functions of starting and canceling PET scanning, and an operator confirms that the scanning time point is confirmed according to the change of the counting rate, so that the PET scanning can be clicked directly through a touch screen, and the operation delay time is reduced. Optionally, when the coincidence event count rates of different detection units are displayed simultaneously, the change of the count rates can be changed from an order of magnitude of 0 to Mcps, so that in order to display and distinguish the differences of all positions in a limited display area, the logarithmic coordinates can be adaptively converted in a mode of equal proportion or logarithmic coordinates and the like, and the coincidence event count rates of all detection units can be optimally compared and displayed.
S202, displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area.
Specifically, the PET scanning equipment displays a first corresponding relation between the acquired coincidence event count rate of the detection unit and the detection unit in a first display area of the display interface, wherein the first corresponding relation is the corresponding relation between the coincidence event count rate of the detection unit and the coincidence event count rate of the detection unit. Optionally, the first display area may include a plurality of coincidence event count rate display units, where the coincidence event count rate of each detection unit corresponds to one coincidence event count rate display unit. It should be noted that, each detection unit has a corresponding coincidence event count rate, and the coincidence event count rates of different detection units may be the same or different.
S203, displaying a second corresponding relation between the coincidence event count rate and the acquisition time in a second display area.
Specifically, the PET scanning device displays, in a second display area of the display interface, a second correspondence between the acquired coincidence event count rate of the detection unit and the acquisition time, where the second correspondence is a correspondence between the coincidence event count rate of the detection unit and the acquisition time, that is, when the PET scanning device obtains the coincidence event count rate of each acquisition time point, the second correspondence between the coincidence event count rate of a certain detection unit and the acquisition time point may be displayed in the second display area. Optionally, the second correspondence represents a graph (as shown in fig. 3) of the coincidence counting rate and the acquisition time of the detecting unit, where the graph includes a plurality of curves, the number of the curves can be determined according to input information of a user, and each curve is a time correspondence between one detecting unit and its corresponding coincidence event counting rate.
S204, determining the dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation.
Specifically, the PET scanning device determines a dynamic reconstruction framing parameter of the PET scanning device according to a first corresponding relation between the coincidence event count rate of the detection unit and/or a second corresponding relation between the coincidence event count rate of the detection unit and the acquisition time. Wherein the dynamic reconstruction framing parameters of the PET scanning device are used to characterize how often the reconstruction of the image is performed per interval. Specifically, the PET scanning device may determine an average value of event count rates of the detection units according to the first correspondence, determine a relationship between the average value and a first set threshold, and determine a dynamic reconstruction frame parameter according to the relationship between the average value and the first set threshold. The PET scanning device may also determine a time starting point according to the second correspondence, determine a relationship between a value of the coincidence event count rate corresponding to the time starting point and a second set threshold, and determine the dynamic reconstruction framing parameter according to the relationship between the value of the coincidence event count rate and the set threshold. Preferably, the PET scanning device may further determine the dynamic reconstruction framing parameter according to a relationship between the average value and the first set threshold value and a relationship between a value of the coincidence event count rate corresponding to the time start point and the second set threshold value. For example: and when the average value is larger than a first set threshold value and the value corresponding to the time starting point and conforming to the event counting rate is larger than a second threshold value, determining a first dynamic reconstruction framing parameter. And when the average value is larger than N times of the first set threshold value and the value of the coincidence event count rate corresponding to the time starting point is larger than N times of the second threshold value, determining the nth dynamic reconstruction framing parameter.
S205, carrying out dynamic reconstruction on the scanning data according to the dynamic reconstruction framing parameters.
Specifically, the PET scanning device dynamically reconstructs the acquired scan data of the scan object according to the determined dynamic reconstruction framing parameters of the PET scanning device. Illustratively, if the determined dynamic reconstruction framing parameter of the PET scanning device is 5, the PET scanning device performs dynamic reconstruction on the acquired scan data of the scan object every 5 minutes.
In the PET dynamic reconstruction method, the PET scanning equipment can accurately determine the dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation between the coincidence event counting rate of the detection unit and/or the second corresponding relation between the coincidence event counting rate of the detection unit and the acquisition time, so that the PET scanning equipment can accurately and dynamically reconstruct the acquired scanning data of the scanning object according to the determined dynamic reconstruction framing parameters, and the image quality of a reconstructed image is improved.
In the above scenario in which the coincidence event count rate of the detection unit is displayed on the display interface including the first display area and the second display area, in one embodiment, the first display area includes a plurality of bar graphs, and different bar graphs represent coincidence event count rates of different detection units; the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
Specifically, as shown in fig. 3, the first display area of the display interface includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve representing a distribution of coincidence event count rates of different detection units over time. Optionally, the color of the plurality of histograms of the first display area of the display interface is different, and the color of the plurality of curves of the second display area of the display interface is different. Optionally, as shown in fig. 3, the coincidence event count rate of each position at the current moment is displayed by using different marks and color histograms in the display interface, and according to the characteristic that the higher the activity of the radioactive source in the detection unit area is, the higher the count is, for a uniform rod source or a water model required by quality control, the center of the PET axial position or different positions need to be positioned, and the distribution of the count rates displayed by each histogram can be observed to judge, that is, the columnar count rates of the two sides of the uniform model body at the position are axisymmetric, as shown in fig. 3a, at this time, the system can judge whether the position of the radioactive source of the operator reaches the preset position based on the mode, thereby realizing the function of automatic positioning. Alternatively, the operator can identify the reconstruction time range of the volume of interest based on the time range in which the scan can be viewed in the historical count rate curve.
In this embodiment, the first display area of the display interface includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve represents distribution of coincidence event count rates of different detection units along with changes of events, so that a doctor can be assisted to see count rate data of a plurality of parts of a human body at one time, thereby being able to assist the doctor to effectively judge whether a radioactive source exists in a scanning area and a moving range of a scanner, and improving accuracy of judging whether the doctor has the radioactive source in the scanning area and the moving range of the scanner.
In the above scenario in which the second correspondence between the event count rate and the acquisition time is displayed in the second display area of the display interface, in one embodiment, as shown in fig. 4, the method further includes:
s401, acquiring a zoom operation instruction based on the second display area.
Specifically, the PET scanning device acquires a zoom operation instruction based on a second display area of the display interface. Alternatively, the zoom operation instruction may be an instruction triggered by the user based on the second display area touch screen of the display interface. Optionally, the scaling operation instruction may be an instruction for scaling any curve in the second display area, or may be an instruction for scaling all curves in the second display area.
S402, in the second display area, scaling the sizes of the curves according to the scaling operation instruction.
Specifically, in the second display area of the display interface, the PET scanning device performs scaling processing on the sizes of the plurality of curves in the second display area according to the acquired scaling operation instruction. It can be understood that in the second display area of the display interface, the scaling processing is performed on the sizes of the multiple curves in the second display area according to the obtained scaling operation instruction, so that the multiple curves in the second display area can be conveniently operated and checked by a user, and the user can be conveniently and accurately positioned to the interested position.
In this embodiment, the PET scanning device is capable of performing scaling processing on the sizes of the multiple curves in the second display area according to the obtained scaling operation instruction in the second display area based on the scaling operation instruction obtained in the second display area of the display interface, so that a user can conveniently operate and view the multiple curves in the second display area, and the user can conveniently and accurately position the position of interest.
In one embodiment, as shown in fig. 5, there is provided a PET scanning object positioning method applied to a PET scanning apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules for acquiring scanning data of a scanning object, the method including the steps of:
S501, acquiring coincidence event count rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
Specifically, the PET scanning device acquires coincidence event count rates of at least two detection units, and displays the acquired coincidence event count rates on a display interface including a first display area and a second display area. By way of example, taking a PET scanning device with an axial length of about 2m as an example, the PET scanning device may be divided into 8 detection units in the axial direction to cover the counting distribution of all positions in the axial direction according to the characteristics of the PET scanning device, and the PET scanning device may acquire coincidence event counting rates of at least two detection units in the 8 detection units.
S502, displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area.
Specifically, the PET scanning device displays a first correspondence between the acquired coincidence event count rate of the detection unit and the detection unit in a first display area of the display interface, where the first correspondence is a correspondence between the detection unit and the coincidence event count rate. Optionally, the first display area may include a plurality of coincidence event count rate display units, where the coincidence event count rate of each detection unit corresponds to one coincidence event count rate display unit. It should be noted that, each detection unit has a corresponding coincidence event count rate, and the coincidence event count rates of different detection units may be the same or different, where the coincidence event count rate corresponding to each detection unit depends on the distribution condition of the medicament in each part of the human body.
S503, displaying a second corresponding relation between the coincidence event count rate and the acquisition time in a second display area.
Specifically, the PET scanning device displays, in a second display area of the display interface, a second correspondence between the acquired coincidence event count rate of the detection unit and the acquisition time, where the second correspondence is a correspondence between the coincidence event count rate of the detection unit and the acquisition time, that is, when the PET scanning device obtains the coincidence event count rate of each acquisition time point, the correspondence between each acquisition time point and the coincidence event count rate of each acquisition time point may be displayed in the second display area, that is, the coincidence event count rate corresponding to each acquisition time point may be displayed in the second display area.
S504, adjusting the position of the scanning object in the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation.
Specifically, the PET scanning device adjusts the position of the scanning object in the PET device according to the first corresponding relation between the coincidence event count rate of the detection unit and/or the second corresponding relation between the coincidence event count rate of the detection unit and the acquisition time. Specifically, the PET scanning device may determine a maximum value of coincidence count rates corresponding to the detecting units at any time, move the center of the scanning object to a position corresponding to the detecting unit corresponding to the maximum value, and adjust the position of the scanning object in the PET device according to a difference value between coincidence count rates between the detecting units at any time, for example, obtain a difference value between coincidence count rates between the detecting units at any time, calculate minimum values of all the difference values, and move the center of the scanning object to positions corresponding to centers of two detecting units corresponding to the minimum values of the difference values. Or, the position of the scanning object in the PET scanning equipment is adjusted according to the difference value between the maximum value of the coincidence counting rate corresponding to the detection units at any moment and the coincidence counting rate among the detection units.
According to the PET scanning object positioning method, the PET scanning equipment can acquire coincidence event count rates of at least two detection units when the detection units scan different parts of a human body, a first corresponding relation between the coincidence event count rates of the detection units and the detection units is displayed in the first display area of the display interface, a second corresponding relation between the coincidence event count rates of the detection units and the acquisition time is displayed in the second display area of the display interface, and then the position of a scanning object in the PET scanning equipment can be adjusted according to the first corresponding relation between the coincidence event count rates of the detection units and/or the second corresponding relation between the coincidence event count rates of the detection units and the acquisition time, so that a doctor is assisted to accurately position the scanning object in the PET scanning equipment according to the display content of the display interface.
In the above scenario in which the coincidence event count rate of the detection unit is displayed on the display interface including the first display area and the second display area, in one embodiment, the first display area includes a plurality of bar graphs, and different bar graphs represent coincidence event count rates of different detection units; the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
Specifically, referring to fig. 3, the first display area of the display interface includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve representing a distribution of coincidence event count rates of different detection units over time. Optionally, the color of the plurality of histograms of the first display area of the display interface is different, and the color of the plurality of curves of the second display area of the display interface is different.
In this embodiment, the first display area of the display interface includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve represents distribution of coincidence event count rates of different detection units along with changes of events, so that a doctor can be assisted to see count rate data of a plurality of parts of a human body at one time, and thus the doctor can be assisted to accurately adjust the position of a scanning object in the PET device, and further the doctor can be assisted to accurately position the scanning object.
In one embodiment, as shown in fig. 6, there is provided a PET count rate display method applied to a PET scanning apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules for acquiring scan data of a scanned object, the method including the steps of:
S601, acquiring coincidence event count rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
Specifically, the PET scanning device acquires coincidence event count rates of at least two detection units, and displays the acquired coincidence event count rates on a display interface including a first display area and a second display area. By way of example, taking a PET scanning device with an axial length of about 2m as an example, the PET scanning device may be divided into 8 detection units in the axial direction to cover the counting distribution of all positions in the axial direction according to the characteristics of the PET scanning device, and the PET scanning device may acquire coincidence event counting rates of at least two detection units in the 8 detection units.
S602, displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area.
Specifically, the PET scanning device displays a first correspondence between the acquired coincidence event count rate of the detection unit and the detection unit in a first display area of the display interface, where the first correspondence is a correspondence between the detection unit and the coincidence event count rate. Optionally, the first display area may include a plurality of coincidence event count rate display units, where the coincidence event count rate of each detection unit corresponds to one coincidence event count rate display unit. It should be noted that, each detection unit has a corresponding coincidence event count rate, and the coincidence event count rates of different detection units may be the same or different, where the coincidence event count rate corresponding to each detection unit depends on the distribution condition of the medicament in each part of the human body.
S603, displaying a second corresponding relation between the coincidence event count rate and the acquisition time in a second display area.
Specifically, the PET scanning device displays, in a second display area of the display interface, a second correspondence between the acquired coincidence event count rate of the detection unit and the acquisition time, where the second correspondence is a correspondence between the coincidence event count rate of the detection unit and the acquisition time, that is, when the PET scanning device obtains the coincidence event count rate of each acquisition time point, the correspondence between each acquisition time point and the coincidence event count rate of each acquisition time point may be displayed in the second display area, that is, the coincidence event count rate corresponding to each acquisition time point may be displayed in the second display area.
According to the counting rate display method based on the PET equipment, the PET scanning equipment can acquire coincidence event counting rates of at least two detection units when the detection units scan different parts of a human body, display a first correspondence relationship between the coincidence event counting rates of the detection units and the detection units in the first display area of the display interface, and display a second correspondence relationship between the coincidence event counting rates of the detection units and the acquisition time in the second display area of the display interface, so that a doctor can see the coincidence event counting rates of a plurality of parts of the human body at one time, thereby assisting the doctor in effectively judging whether a radioactive source exists in the scanning area and judging the moving range of the scanner, and improving the accuracy of judging whether the radioactive source exists in the scanning area and judging the moving range of the scanner.
In the above scenario in which the coincidence event count rate of the detection unit is displayed on the display interface including the first display area and the second display area, in one embodiment, the first display area includes a plurality of bar graphs, and different bar graphs represent coincidence event count rates of different detection units; the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
Specifically, as can be seen in fig. 3, the first display area of the display interface includes a plurality of bar graphs, different bar graphs representing coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve representing a distribution of coincidence event count rates of different detection units over time. Optionally, the color of the plurality of histograms of the first display area of the display interface is different, and the color of the plurality of curves of the second display area of the display interface is different.
In this embodiment, the first display area of the display interface includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and the second display area of the display interface includes a plurality of curves, each curve represents distribution of coincidence event count rates of different detection units along with changes of events, so that a doctor can be assisted to see count rate data of a plurality of parts of a human body at one time, thereby being able to assist the doctor to effectively judge whether a radioactive source exists in a scanning area and a moving range of a scanner, and improving accuracy of judging whether the doctor has the radioactive source in the scanning area and the moving range of the scanner.
It should be understood that, although the steps in the flowcharts of fig. 2-6 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-6 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the steps or stages in other steps or other steps.
In one embodiment, a PET scanning device is provided, comprising a plurality of detection units, a display interface, a control unit and a reconstruction unit, wherein:
the detection units comprise a plurality of annularly arranged detection modules, and each detection unit is used for acquiring scanning data of a scanning object;
the display interface comprises a first display area and a second display area, wherein the first display area displays a first corresponding relation conforming to the event counting rate and the detection unit, and the second display area displays a second corresponding relation conforming to the event counting rate and the acquisition time;
The control unit is used for sending the first corresponding relation and the second corresponding relation to the display interface and adjusting the position of the scanning object in the PET scanning equipment;
and the reconstruction unit is used for dynamically reconstructing the scanning data.
The PET scanning device provided in this embodiment may refer to the description of the foregoing method embodiment, and its principle and technical effects are similar, and are not described herein.
In one embodiment, as shown in fig. 7, there is provided a PET dynamic reconstruction device applied to a PET scanning apparatus, the PET scanning apparatus including a plurality of detection units, each detection unit including a plurality of annularly arranged detection modules, the detection units being configured to acquire scan data of a scanned object, including: the device comprises a first acquisition module, a first display module, a second display module, a determination module and a reconstruction module, wherein:
the first acquisition module is used for acquiring coincidence event count rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
The first display module is used for displaying a first corresponding relation between the coincidence event counting rate and the detection unit in the first display area.
And the second display module is used for displaying a second corresponding relation which accords with the event counting rate and the acquisition time in a second display area.
And the determining module is used for determining the dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and the second corresponding relation.
And the reconstruction module is used for dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters.
Optionally, the first display area includes a plurality of histograms, different histograms representing coincidence event count rates of different detection units;
the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
Optionally, the color of the plurality of histograms are different;
the colors of the curves are different.
The PET dynamic reconstruction device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
On the basis of the above embodiment, optionally, the above apparatus further includes: the second acquisition module and the operation module, wherein:
and the second acquisition module is used for acquiring the zoom operation instruction based on the second display area.
And the operation module is used for scaling the sizes of the multiple curves in the second display area according to the scaling operation instruction.
The PET dynamic reconstruction device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
For specific limitations on the PET dynamic reconstruction device, reference may be made to the above limitations on the PET dynamic reconstruction method, and no further description is given here. The above-described respective modules in the PET dynamic reconstruction device may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, as shown in fig. 8, there is provided a PET scanning object positioning apparatus applied to a PET scanning device including a plurality of detection units, each including a plurality of annularly arranged detection modules, the detection units being configured to acquire scanning data of a scanning object, including: the device comprises an acquisition module, a first display module, a second display module and an adjustment module, wherein:
the acquisition module is used for acquiring coincidence event counting rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
The first display module is used for displaying a first corresponding relation between the coincidence event counting rate and the detection unit in the first display area.
And the second display module is used for displaying a second corresponding relation which accords with the event counting rate and the acquisition time in a second display area.
And the adjusting module is used for adjusting the position of the scanning object in the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation.
Optionally, the first display area includes a plurality of histograms, different histograms representing coincidence event count rates of different detection units;
the second display area comprises a plurality of curves, and each curve represents the change distribution of the coincidence event count rate of different detection units along with time.
Optionally, the color of the plurality of histograms are different; the colors of the curves are different.
For specific limitations on the PET scan object positioning device, reference is made to the above limitation on the PET scan object positioning method, and no further description is given here. The respective modules in the above PET scanning object positioning device may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, as shown in fig. 9, there is provided a PET count rate display device applied to a PET scanning apparatus including a plurality of detection units, each including a plurality of annularly arranged detection modules, the detection units being configured to acquire scan data of a scan object, including: the device comprises an acquisition module, a first display module and a second display module, wherein:
the acquisition module is used for acquiring coincidence event counting rates of at least two detection units; and displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area.
The first display module is used for displaying a first corresponding relation between the coincidence event counting rate and the detection unit in the first display area.
And the second display module is used for displaying a second corresponding relation which accords with the event counting rate and the acquisition time in a second display area.
Optionally, the first display area includes a plurality of histograms, different histograms represent coincidence event count rates of different detection units, and colors of the plurality of histograms are different;
the second display area comprises a plurality of curves, each curve represents the time-dependent distribution of coincidence event count rates of different detection units, and the colors of the plurality of curves are different.
For specific limitations on the PET count rate display device, reference may be made to the above limitations on the PET count rate display method, and no further description is given here. The respective modules in the above-described PET-device-based count rate display apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and an internal structure diagram thereof may be as shown in fig. 10. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program, when executed by the processor, implements a method for dynamic reconstruction, scan object positioning, count rate display. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 10 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in a second display area;
determining dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation;
and dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters.
The computer device provided in the foregoing embodiments has similar implementation principles and technical effects to those of the foregoing method embodiments, and will not be described herein in detail.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in a second display area;
determining dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation;
and dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters.
The computer readable storage medium provided in the above embodiment has similar principle and technical effects to those of the above method embodiment, and will not be described in detail herein.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
Acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in a second display area;
and adjusting the position of the scanning object in the PET equipment according to the first corresponding relation and/or the second corresponding relation.
The computer device provided in the foregoing embodiments has similar implementation principles and technical effects to those of the foregoing method embodiments, and will not be described herein in detail.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in a second display area;
And adjusting the position of the scanning object in the PET equipment according to the first corresponding relation and/or the second corresponding relation.
The computer readable storage medium provided in the above embodiment has similar principle and technical effects to those of the above method embodiment, and will not be described in detail herein.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
and displaying a second corresponding relation between the coincidence event counting rate and the acquisition time in a second display area.
The computer device provided in the foregoing embodiments has similar implementation principles and technical effects to those of the foregoing method embodiments, and will not be described herein in detail.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
Acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in a first display area;
and displaying a second corresponding relation between the coincidence event counting rate and the acquisition time in a second display area.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the present application, which falls within the scope of the present application. Accordingly, the scope of protection of the present application is subject to the appended claims.
Claims (8)
1. A PET dynamic reconstruction method applied to a PET scanning device, the PET scanning device comprising a plurality of detection units, each detection unit comprising a plurality of annularly arranged detection modules, the detection units being configured to acquire scan data of a scanned object, the method comprising:
acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
Displaying a first corresponding relation between the coincidence event count rate and the detection unit in the first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in the second display area;
determining dynamic reconstruction framing parameters of the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation; wherein determining the dynamic reconstruction framing parameter of the PET scanning device according to the first correspondence includes: determining an average value of coincidence event count rates of all detection units according to the first corresponding relation, judging the relation between the average value and a first set threshold value, and determining the dynamic reconstruction framing parameter according to the relation between the average value and the first set threshold value; the determining the dynamic reconstruction framing parameter of the PET scanning device according to the second correspondence includes: determining a time starting point according to the second corresponding relation, judging the relation between the value of the coincidence event counting rate corresponding to the time starting point and a second set threshold, and determining the dynamic reconstruction framing parameter according to the relation between the value of the coincidence event counting rate corresponding to the time starting point and the second set threshold;
And dynamically reconstructing the scanning data according to the dynamic reconstruction framing parameters.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the first display area comprises a plurality of histograms, and different histograms represent coincidence event count rates of different detection units;
the second display area comprises a plurality of curves, and each curve represents the change distribution of coincidence event counting rate of different detection units along with time.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
the color of the plurality of histograms is different;
the colors of the curves are different.
4. The method according to claim 2, wherein the method further comprises:
obtaining a zooming operation instruction based on the second display area;
and in the second display area, scaling the sizes of the curves according to the scaling operation instruction.
5. A PET scan object positioning method applied to a PET scan apparatus including a plurality of detection units each including a plurality of annularly arranged detection modules for acquiring scan data of a scan object, the method comprising:
Acquiring coincidence event count rates of at least two detection units; displaying the coincidence event counting rate on a display interface, wherein the display interface comprises a first display area and a second display area;
displaying a first corresponding relation between the coincidence event count rate and the detection unit in the first display area;
displaying a second corresponding relation conforming to the event counting rate and the acquisition time in the second display area;
adjusting the position of the scanning object in the PET scanning equipment according to the first corresponding relation and/or the second corresponding relation; wherein adjusting the position of the scanning object in the PET scanning device according to the first correspondence and/or the second correspondence comprises: determining the maximum value of the coincidence counting rate corresponding to the detection unit at any moment, and moving the center of the scanning object to the position corresponding to the detection unit corresponding to the maximum value; or adjusting the position of the scanning object in the PET scanning equipment according to the difference value between coincidence event counting rates among the detection units at any moment.
6. The method of claim 5, wherein the step of determining the position of the probe is performed,
the first display area comprises a plurality of histograms, and different histograms represent coincidence event count rates of different detection units;
The second display area comprises a plurality of curves, and each curve represents the change distribution of coincidence event counting rate of different detection units along with time.
7. The method of claim 6, wherein the plurality of histograms are each of a different color; the colors of the curves are different.
8. A PET scanning device, the PET scanning device comprising:
the device comprises a plurality of detection units, a plurality of detection units and a plurality of detection units, wherein each detection unit comprises a plurality of detection modules which are annularly arranged, and the detection units are used for acquiring scanning data of a scanning object;
the display interface comprises a first display area and a second display area, wherein a first corresponding relation between the coincidence event counting rate and the detection unit is displayed in the first display area, and a second corresponding relation between the coincidence event counting rate and the acquisition time is displayed in the second display area;
the control unit is used for sending the first corresponding relation and the second corresponding relation to a display interface and adjusting the position of a scanning object in the PET scanning equipment; the adjusting the position of the scan object in the PET scanning device comprises: determining the maximum value of the coincidence counting rate corresponding to the detection unit at any moment, and moving the center of the scanning object to the position corresponding to the detection unit corresponding to the maximum value; or, adjusting the position of the scanning object in the PET scanning equipment according to the difference value between coincidence event counting rates among the detection units at any moment;
And the reconstruction unit is used for dynamically reconstructing the scanning data.
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