Method, device, medium and electronic device for adjusting CT scanning dose

Abstract

The present disclosure provides a method, device, medium and electronic device for adjusting CT scanning dose, including: obtaining an initial scanning dose and scanning position relationship curve; superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, the smooth curve being consistent with the change trend of the initial scanning dose and scanning position relationship curve; setting an image building position on the smooth curve and a target dose corresponding to the image building position in response to a setting instruction; and calculating the influence area of ​​the image building position, adjusting the scanning dose at the image building position to the target dose, and adjusting the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent. The present disclosure can adjust the scanning dose according to user expectations and maintain a high image quality overall.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a method, device, medium and electronic device for adjusting a scanning dose. Background Art

[0002] Computed Tomography (CT) uses X-ray beams to scan a certain thickness of a certain part of the human body. The detector receives the X-rays that pass through the layer, converts them into visible light, and then converts them into electrical signals through photoelectric conversion. Then, they are converted into digital signals through analog / digital converters and input into computers for processing. However, the scanning dose of existing CT systems is usually based on minimizing the average dose of patients, which is not very effective in actual diagnosis. Summary of the invention

[0003] The purpose of the present disclosure is to provide a method, device, medium and electronic device for adjusting CT scan dose, which can solve at least one of the above-mentioned technical problems. The specific solution is as follows:

[0004] According to a specific embodiment of the present disclosure, in a first aspect, the present disclosure provides a method for adjusting a CT scanning dose, comprising: obtaining an initial scanning dose and scanning position relationship curve; superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, wherein the smooth curve is consistent with a change trend of the initial scanning dose and scanning position relationship curve; in response to a setting instruction, setting an image building position on the smooth curve and a target dose corresponding to the image building position; and calculating an influence area of ​​the image building position, adjusting the scanning dose at the image building position to the target dose and adjusting the scanning dose of the influence area so that the noise value of the entire scanned continuous image remains consistent.

[0005] Optionally, obtaining the relationship curve between the initial scanning dose and the scanning position includes: obtaining a positioning film scanning result of the scanning object; calculating the scanning dose required for different scanning positions of the scanning object according to the positioning film scanning result of the scanning object; and drawing the relationship curve between the initial scanning dose and the scanning position in a plane rectangular coordinate system, wherein the relationship curve is composed of multiple broken lines with different slopes connected end to end.

[0006] Optionally, obtaining the positioning film scanning result of the scanned object includes: positioning the scanned object according to the part of the scanned object to be scanned, lighting up the scanning positioning line of the CT system, and confirming the starting scanning position where the scanning positioning line of the CT system irradiates the body surface of the scanned object; and the scanning bed drives the scanned object to pass through the ray area of ​​the CT system at a uniform speed, controls the CT system to continuously collect data, and obtains the positioning film scanning result of the scanned object.

[0007] Optionally, superimposing a smooth curve on the initial scanning dose and scanning position relationship curve includes: segmenting the relationship curve according to the change behavior of scanning dose data; respectively calculating a segmented smooth curve corresponding to each segment of the relationship curve; and superimposing the segmented smooth curves to obtain the smooth curve.

[0008] Optionally, segmenting the relationship curve according to the change behavior of the scanning dose data includes: segmenting the relationship curve according to the change of the slope sign and / or the sudden change of the slope value of the scanning dose data at the segmentation points.

[0009] Optionally, the method for obtaining the smooth curve includes: selecting a series of points on the relationship curve, and then connecting the selected series of points in sequence using a smooth curve.

[0010] Optionally, the adjusting the scanning dose of the affected area includes: inferring a virtual water model diameter d' according to the target dose; proportionally converting an equivalent water model diameter of a position adjacent to the imaging position according to the virtual water model diameter d'; and determining a corresponding adjacent position scanning dose according to the equivalent water model diameter of the adjacent position.

[0011] According to a specific embodiment of the present disclosure, in a second aspect, the present disclosure provides a device for adjusting a CT scan dose, comprising:

[0012] An acquisition unit, used for acquiring a curve of the relationship between an initial scanning dose and a scanning position;

[0013] A superimposing unit, used for superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, wherein the smooth curve has a consistent change trend with the initial scanning dose and scanning position relationship curve;

[0014] A setting unit, configured to set an imaging position on the smooth curve and a target dose corresponding to the imaging position in response to a setting instruction;

[0015] The adjustment unit is used to calculate the influence area of ​​the imaging position, adjust the scanning dose at the imaging position to the target dose, and adjust the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent.

[0016] According to a specific embodiment of the present disclosure, in a third aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the method for adjusting the CT scan dose as described in any one of the above items is implemented.

[0017] According to a specific embodiment of the present disclosure, in a fourth aspect, the present disclosure provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement a method for adjusting a CT scan dose as described in any one of the above items.

[0018] Compared with the prior art, the above-mentioned scheme of the embodiment of the present disclosure has at least the following beneficial effects: compared with the prior art, the above-mentioned scheme of the embodiment of the present disclosure can adjust the scanning dose according to user expectations and maintain a high image quality as a whole, thereby obtaining better diagnostic results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 A flow chart of a method for adjusting CT scan dose provided in an embodiment of the present disclosure.

[0021] Figure 2 This is a curve showing the relationship between the initial scanning dose and the scanning position obtained in the embodiment of the present disclosure.

[0022] Figure 3 This is a curve showing the relationship between the initial scanning dose and the scanning position after the smooth curve is superimposed in the embodiment of the present disclosure.

[0023] Figure 4 A schematic diagram of the imaging position selected in the embodiment of the present disclosure and the target dose corresponding to the imaging position.

[0024] Figure 5 As shown on the positioning sheet Figure 4 The influence area of ​​the image position is shown in .

[0025] Figure 6 A schematic diagram of the structure of a device for adjusting CT scan dose provided in an embodiment of the present disclosure.

[0026] Figure 7 Schematic diagram of the connection structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0029] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should be understood that although the terms first, second, third, etc. may be used to describe in the disclosed embodiments, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the disclosed embodiments, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0031] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0032] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0033] The optional embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] The present disclosure provides a method for adjusting CT scan dose, such as Figure 1 As shown, the specific steps include:

[0036] S101, obtaining an initial scanning dose and scanning position relationship curve.

[0037] In this step, the CT system needs to evaluate the scan dose required for different parts (scanning positions) of the scanned object before executing the scan plan. Using different scan doses for different parts can reduce the dose used for the scanned object, and can also reduce the exposure power of the CT system and extend the service life of the CT system.

[0038] In some embodiments, the scanning dose required for different scanning positions can be calculated based on the results of the positioning film scan. Specifically, the process of the CT system performing the positioning film scan is: the scanning object lies on the scanning bed, the scanning object is positioned according to the part of the scanning object to be scanned, and the scanning positioning line of the machine is lit, and it is confirmed that the scanning positioning line of the machine irradiates the starting scanning position of the body surface of the scanning object; after the positioning is completed, the CT device continuously emits rays and collects data, at which time the scanning bed drives the scanning object to pass through the ray area at a uniform speed, and the positioning film of the scanning object is formed after processing. The positioning film of the scanning object is a preliminary image obtained before the main tomography examination is performed. After obtaining the positioning film of the scanning object, the CT system can calculate the Z-direction equivalent water model diameter of the current scanning object according to the positioning film, wherein the Z direction is the direction perpendicular to the scanning plane and is also the direction of movement of the scanning bed, and the equivalent water model diameter is the diameter of the water model with the same X-ray absorption as a specific patient. Based on the Z-direction equivalent water model diameter of the scanning object and the predetermined image noise level, the scanning dose corresponding to different parts of the scanning object, that is, the initial scanning dose, can be calculated, and then the image can be drawn as follows. Figure 2 The relationship curve between the initial scanning dose and the scanning position is shown.

[0039] S102, superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, wherein the smooth curve has a consistent change trend with the initial scanning dose and scanning position relationship curve.

[0040] In this step, the smooth curve is calculated based on the initial scan dose. Figure 3 , the smooth curve in the figure (curve 1) is basically consistent with the trend of the initial scanning dose (curve 2).

[0041] In some embodiments, the smooth curve is obtained by the following method:

[0042] S1021, segmenting the relationship curve according to the change behavior of the scanning dose data;

[0043] In this step, the change behavior of the scanning dose data can be manifested as an obvious change in the slope of the scanning dose data at the segmentation point, such as a change in the slope sign and / or a sudden change in the slope value, such as Figure 3 In the curve of the relationship between the initial scanning dose and the scanning position, the bending point of each straight line forms a dividing point between two segments.

[0044] S1022, respectively calculating the piecewise smooth curve corresponding to each section of the relationship curve; and

[0045] S1023: Superimpose the piecewise smooth curves to obtain the smooth curve.

[0046] In some embodiments, the smooth curve is formed by selecting a series of points on the initial scanning dose curve and then connecting the selected series of points with a smooth curve.

[0047] S103, in response to the setting instruction, setting the imaging position on the smooth curve and the target dose corresponding to the imaging position.

[0048] In this step, it is necessary to set the imaging position on the smooth curve and the target dose corresponding to the imaging position. The imaging position can be one or more points on the horizontal coordinate of the scanning position, and each point on the horizontal coordinate of the scanning position corresponds to a certain part of the scanned object. Users can add scanning positions that need to change the dose according to specific needs.

[0049] In some embodiments, Figure 4 As shown, the user selects two imaging positions A and B on the smooth curve, and drags the point corresponding to the imaging position A on the smooth curve upward to the target dose a by using the mouse, indicating that the user wishes to increase the scanning dose of the current imaging position A. In the figure, the user also drags the point corresponding to the imaging position B on the smooth curve downward to the target dose b, indicating that the user wishes to reduce the scanning dose of the current imaging position B. In response to the above setting instructions of the user, the imaging position A on the smooth curve and the target dose a corresponding to the imaging position A are set, and the imaging position B on the smooth curve and the target dose b corresponding to the imaging position B are set.

[0050] In some embodiments, the setting instruction can be a user clicking, dragging or inputting a specific numerical value or a percentage related to the numerical value through an input device such as a mouse, keyboard, touch panel, etc., or inputting or selecting a corresponding numerical value or percentage through voice or other means, or setting a related imaging position and a target dose corresponding to the imaging position through mutual calls between programs.

[0051] S104, calculating the influence area of ​​the imaging position, adjusting the scanning dose at the imaging position to the target dose, and adjusting the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent.

[0052] In this step, the adjacent area of ​​the imaging position is determined as the affected area. When the scanning dose at the imaging position is changed, the scanning dose corresponding to the affected area also needs to be changed together with the parameters to ensure that the noise value of the entire scanned continuous image remains consistent. That is, when the user selects an imaging position that needs to be adjusted, the scanning dose of the imaging position and its adjacent positions need to be adjusted.

[0053] Changing the point of the smooth curve will inevitably change the scan dose of the image at the current position. The scan dose is controlled by controlling the current size (mA value) of the scanning ray. Therefore, it is necessary to calculate how the overall mA value changes according to the changed mA value to meet the condition that the overall image noise remains unchanged. In particular, for the adjacent positions of the changed points, it is necessary to calculate the mA value of the adjacent points after the change, and then change the recommended dose curve and the smooth curve at the same time.

[0054] In some embodiments, the influence area of ​​the imaging position is calculated according to the positions of two fold lines on the left and right sides adjacent to the imaging position. The specific width of the influence area will vary depending on the aperture of the collimation system of the light source selected during scanning. It can be understood that the actual calculation is not limited to the two fold line positions.

[0055] like Figure 4 As shown, since the corresponding position of the actual human body scan has a corresponding equivalent water model diameter d, adjusting the scanning dose at the imaging position to the target dose, for example, adjusting the dose from a0 to a, is equivalent to abandoning the equivalent water model diameter d of the corresponding position A of the actual human body scan, and using the dose value a corresponding to the change point position. At this time, a virtual water model diameter d' can be inferred according to the target dose a. When adjusting the scanning dose of the position adjacent to the imaging position A (for example, A1, A2), the equivalent water model diameters (d1'd2') of the two fold line positions (A1, A2) adjacent to the imaging position can be proportionally converted according to the inferred virtual water model diameter d' of the position A. By analogy, the water model diameters of multiple positions can be virtualized, and then the dose values ​​(for example, a1, a2) corresponding to the multiple positions can be determined according to the virtual water model diameters of the multiple positions, and then smoothly connected in sequence, so as to obtain a new dose recommendation curve.

[0056] In some embodiments, adjusting the scanning dose of the affected area includes:

[0057] S1041, inferring a virtual water model diameter d' according to the target dose;

[0058] S1042: proportionally convert the virtual water phantom diameter d' to obtain an equivalent water phantom diameter of a position adjacent to the imaging position, and determine a corresponding scanning dose (mA value) according to the equivalent water phantom diameter of the adjacent position.

[0059] In some embodiments, the affected area corresponding to the imaging position may be displayed on the positioning film. Figure 4 There is a corresponding relationship between the horizontal axis of the dose curve and the position on the localizer image. Figure 5 , the rectangular area A in the figure is Figure 4 The influence area corresponding to the image location A is shown, and the rectangular area B is Figure 4 The influence area corresponding to the imaging position B is shown.

[0060] Example 2

[0061] The present disclosure also provides an apparatus embodiment that is consistent with the above-mentioned embodiment, and is used to implement the method steps described in the above-mentioned embodiment. The explanation based on the same name meaning is the same as that of the above-mentioned embodiment, and has the same technical effect as that of the above-mentioned embodiment, and will not be repeated here.

[0062] like Figure 6 As shown, the present disclosure provides a device for adjusting CT scanning dose, comprising:

[0063] The acquisition unit 301 is used to acquire a curve of the relationship between the initial scanning dose and the scanning position.

[0064] Before executing the scanning plan, the CT system needs to evaluate the scanning dose required for different parts (scanning positions) of the scanned object. Using different scanning doses for different parts can reduce the dose used for the scanned object, and can also reduce the exposure power of the CT system and extend the service life of the CT system.

[0065] In some embodiments, the scanning dose required for different scanning positions can be calculated based on the results of the positioning film scan. Specifically, the process of the CT system performing the positioning film scan is: the scanning object lies on the scanning bed, the scanning object is positioned according to the part of the scanning object to be scanned, and the scanning positioning line of the machine is lit, and it is confirmed that the scanning positioning line of the machine irradiates the starting scanning position of the body surface of the scanning object; after the positioning is completed, the CT device continuously emits rays and collects data, at which time the scanning bed drives the scanning object to pass through the ray area at a uniform speed, and the positioning film of the scanning object is formed after processing. The positioning film of the scanning object is a preliminary image obtained before the main tomography examination is performed. After obtaining the positioning film of the scanning object, the CT system can calculate the Z-direction equivalent water model diameter of the current scanning object according to the positioning film, wherein the Z direction is the direction perpendicular to the scanning plane and is also the direction of movement of the scanning bed, and the equivalent water model diameter is the diameter of the water model with the same X-ray absorption as a specific patient. Based on the Z-direction equivalent water model diameter of the scanning object and the predetermined image noise level, the scanning dose corresponding to different parts of the scanning object, that is, the initial scanning dose, can be calculated, and then the image can be drawn as follows. Figure 2 The relationship curve between the initial scanning dose and the scanning position is shown.

[0066] The superimposition unit 302 is used to superimpose a smooth curve on the initial scanning dose and scanning position relationship curve, and the smooth curve has a consistent variation trend with the initial scanning dose and scanning position relationship curve.

[0067] The smoothed curve is calculated based on the initial scan dose. Figure 3 , the smooth curve (curve 1) in the figure is substantially consistent with the trend of the initial scanning dose (curve 2). In some embodiments, the smooth curve is formed by selecting a series of points on the initial scanning dose curve, and then connecting the selected series of points with a smooth curve.

[0068] The setting unit 303 is used to set the imaging position on the smooth curve and the target dose corresponding to the imaging position in response to the setting instruction.

[0069] It is necessary to set the imaging position on the smooth curve and the target dose corresponding to the imaging position. The imaging position can be one or more points on the horizontal coordinate of the scanning position, and each point on the horizontal coordinate of the scanning position corresponds to a certain part of the scanned object. Users can add scanning positions that need to change the dose according to specific needs.

[0070] In some embodiments, Figure 4As shown, the user selects two imaging positions A and B on the smooth curve, and drags the point corresponding to the imaging position A on the smooth curve upward to the target dose a by using the mouse, indicating that the user wishes to increase the scanning dose of the current imaging position A. In the figure, the user also drags the point corresponding to the imaging position B on the smooth curve downward to the target dose b, indicating that the user wishes to reduce the scanning dose of the current imaging position B. In response to the above setting instructions of the user, the imaging position A on the smooth curve and the target dose a corresponding to the imaging position A are set, and the imaging position B on the smooth curve and the target dose b corresponding to the imaging position B are set.

[0071] In some embodiments, the setting instruction can be a user clicking, dragging or inputting a specific numerical value or a percentage related to the numerical value through an input device such as a mouse, keyboard, touch panel, etc., or inputting or selecting a corresponding numerical value or percentage through voice or other means, or setting a related imaging position and a target dose corresponding to the imaging position through mutual calls between programs.

[0072] The adjustment unit 304 is used to calculate the influence area of ​​the imaging position, adjust the scanning dose at the imaging position to the target dose, and adjust the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent.

[0073] The adjacent area of ​​the imaging position is determined as the influence area. When the scanning dose at the imaging position is changed, the scanning dose corresponding to the influence area also needs to be changed together with the parameters to ensure that the noise value of the entire scanned continuous image remains consistent.

[0074] That is, when the user selects an imaging position that needs to be adjusted, the scanning doses of the imaging position and its adjacent positions need to be adjusted.

[0075] Changing the point of the smooth curve will inevitably change the scan dose of the image at the current position. The scan dose is controlled by controlling the current size (mA value) of the scanning ray. Therefore, it is necessary to calculate how the overall mA value changes according to the changed mA value to meet the condition that the overall image noise remains unchanged. In particular, for the adjacent positions of the changed points, it is necessary to calculate the mA value of the adjacent points after the change, and then change the recommended dose curve and the smooth curve at the same time.

[0076] In some embodiments, the influence area of ​​the imaging position is calculated according to the positions of two fold lines on the left and right sides adjacent to the imaging position. The specific width of the influence area will vary depending on the aperture of the collimation system of the light source selected during scanning. It can be understood that the actual calculation is not limited to the two fold line positions.

[0077] like Figure 4As shown, since the corresponding position of the actual human body scan has a corresponding equivalent water model diameter d, adjusting the scanning dose at the imaging position to the target dose, for example, adjusting the dose from a0 to a, is equivalent to abandoning the equivalent water model diameter d of the corresponding position A of the actual human body scan, and using the dose value a corresponding to the change point position. At this time, a virtual water model diameter d' can be inferred according to the target dose a. When adjusting the scanning dose of the position adjacent to the imaging position A (for example, A1, A2), the equivalent water model diameters (d1'd2') of the two fold line positions (A1, A2) adjacent to the imaging position can be proportionally converted according to the inferred virtual water model diameter d' of the position A. By analogy, the water model diameters of multiple positions can be virtualized, and then the dose values ​​(for example, a1, a2) corresponding to the multiple positions can be determined according to the virtual water model diameters of the multiple positions, and then smoothly connected in sequence, so as to obtain a new dose recommendation curve.

[0078] In some embodiments, adjusting the scanning dose of the affected area includes:

[0079] S1041, inferring a virtual water model diameter d' according to the target dose;

[0080] S1042: proportionally convert the virtual water phantom diameter d' to obtain an equivalent water phantom diameter of a position adjacent to the imaging position, and determine a corresponding scanning dose (mA value) according to the equivalent water phantom diameter of the adjacent position.

[0081] In some embodiments, the affected area corresponding to the imaging position may be displayed on the positioning film. Figure 4 There is a corresponding relationship between the horizontal axis of the dose curve and the position on the localizer image. Figure 5 , the rectangular area A in the figure is Figure 4 The influence area corresponding to the image location A is shown, and the rectangular area B is Figure 4 The influence area corresponding to the imaging position B is shown.

[0082] Example 3

[0083] like Figure 7 As shown, this embodiment provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method steps described in the above embodiment.

[0084] Example 4

[0085] An embodiment of the present disclosure provides a non-volatile computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the method steps described in the above embodiment.

[0086] Example 5

[0087] Reference below Figure 7 , which shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present disclosure. The terminal device in the embodiments of the present disclosure may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 7 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0088] like Figure 7 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage device 408 into a random access memory (RAM) 403. In RAM 403, various programs and data required for the operation of the electronic device are also stored. Processing device 401, ROM 402, and RAM 403 are connected to each other via a bus 405. An input / output (I / O) interface 405 is also connected to bus 405.

[0089] Typically, the following devices may be connected to the I / O interface 405: input devices 406 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 405 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 408 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 405. The communication devices 405 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 7 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0090] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 405, or installed from the storage device 408, or installed from the ROM 402. When the computer program is executed by the processing device 401, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0091] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0092] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0093] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0094] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0095] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

Claims

1. A method for adjusting CT scan dose, characterized in that: include: Obtaining a curve of relationship between initial scanning dose and scanning position; superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, wherein the smooth curve has a consistent change trend with the initial scanning dose and scanning position relationship curve; In response to the setting instruction, setting the imaging position on the smooth curve and the target dose corresponding to the imaging position; as well as Calculating the influence area of ​​the imaging position, adjusting the scanning dose at the imaging position to the target dose, and adjusting the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent; adjusting the scanning dose of the influence area includes: Inferring a virtual water model diameter d' according to the target dose; Proportionally converting the virtual water model diameter d' to obtain an equivalent water model diameter of a position adjacent to the image building position; and The corresponding adjacent position scanning dose is determined according to the equivalent water model diameter of the adjacent position.

2. The method according to claim 1, characterized in that The step of obtaining a curve of the relationship between the initial scanning dose and the scanning position includes: Obtaining a positioning film scanning result of the scanned object; Calculating the scanning dose required for different scanning positions of the scanning object according to the scanning result of the positioning film of the scanning object; A relationship curve between the initial scanning dose and the scanning position is drawn in a plane rectangular coordinate system, wherein the relationship curve is formed by connecting a plurality of broken lines with different slopes end to end.

3. The method according to claim 2, characterized in that The obtaining of the scanning result of the positioning film of the scanning object comprises: Positioning the scanned object according to the part of the scanned object to be scanned, lighting up the scanning positioning line of the CT system, and confirming the starting scanning position where the scanning positioning line of the CT system irradiates the body surface of the scanned object; and The scanning bed drives the scanned object to pass through the ray area of ​​the CT system at a uniform speed, controls the CT system to continuously collect data, and obtains the localization film scanning result of the scanned object.

4. The method according to claim 1, characterized in that: The step of superimposing a smooth curve on the initial scanning dose and scanning position relationship curve comprises: Segmenting the relationship curve according to the change behavior of the scanning dose data; Calculate the piecewise smooth curve corresponding to each section of the relationship curve respectively; and The piecewise smooth curves are superimposed to obtain the smooth curve.

5. The method according to claim 4, characterized in that The segmenting of the relationship curve according to the change behavior of the scanning dose data comprises: The relationship curve is segmented according to a change in the slope sign and / or a sudden change in the slope value of the scanning dose data at the segmentation points.

6. The method according to claim 4, characterized in that The method for obtaining the smooth curve comprises: A series of points are selected on the relationship curve, and then the selected series of points are sequentially connected using a smooth curve.

7. A device for adjusting CT scan dose, characterized in that: include: An acquisition unit, used for acquiring a curve of the relationship between an initial scanning dose and a scanning position; A superimposing unit, used for superimposing a smooth curve on the initial scanning dose and scanning position relationship curve, wherein the smooth curve has a consistent change trend with the initial scanning dose and scanning position relationship curve; A setting unit, configured to set an imaging position on the smooth curve and a target dose corresponding to the imaging position in response to a setting instruction; The adjusting unit is used to calculate the influence area of ​​the imaging position, adjust the scanning dose at the imaging position to a target dose, and adjust the scanning dose of the influence area to keep the noise value of the entire scanned continuous image consistent, wherein the adjusting of the scanning dose of the influence area includes: inferring a virtual water model diameter d' according to the target dose; proportionally converting an equivalent water model diameter of a position adjacent to the imaging position according to the virtual water model diameter d'; and determining a corresponding adjacent position scanning dose according to the equivalent water model diameter of the adjacent position.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the method according to any one of claims 1 to 6.

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