CN112998733A - CT scanning method and device and CT scanner - Google Patents
CT scanning method and device and CT scanner Download PDFInfo
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Abstract
The invention provides a CT scanning method and device and a CT scanner, wherein the CT scanning method comprises the following steps: controlling the scanning bed to translate along the axis direction of the rack and simultaneously controlling the rack to drive the bulb tube on the rack to rotate; when the rack rotates until the bulb tube is positioned at a first preset angle, controlling the bulb tube to pay off to obtain first image information, wherein the first image information comprises all human body images obtained when the bulb tube is positioned at the first preset angle; when the stand rotates to the second preset angle of the bulb tube, controlling the bulb tube to pay off to obtain second image information, wherein the second image information comprises all human body images obtained when the bulb tube is located at the second preset angle; and determining the human body image according to the first image information and the second image information. According to the invention, the bulb tube random frame rotates to the first preset angle and the second preset angle, and the first image information and the second image information are obtained by respectively paying off, so that the scanning bed can be translated once to complete the acquisition of the front image information and the side image information of the human body, and the scanning process is simplified. Only one bulb tube is needed in the scanning process, and resources are saved.
Description
Technical Field
The invention relates to the technical field of medical imaging, in particular to a CT scanning method and device and a CT scanner.
Background
In recent years, with the rapid development of Computed Tomography (CT) technology, the diagnostic capability and scanning speed of CT are significantly improved, and the clinical application range of CT is greatly expanded. But the potential hazard brought by CT radiation is increasingly concerned. In order to reduce the radiation dose and improve the image quality, a current modulation technique is generally used, in which a current is increased when the radiation passing through the human body is long and the current is decreased when the radiation passing through the human body is short. Therefore, it is necessary to acquire human body image information to perform current modulation according to the human body image information.
In the prior art, human body image information is acquired through two times of flat scanning: the frame is provided with two ball tubes which are respectively positioned right above and at the side of the scanning bed, and in the one-time translation process of the scanning bed, the ball tubes above the scanning bed pay off to obtain the orthostatic image of the human body. And in the second translation process of the scanning bed, the ball tubes on the side part are paid out to obtain a side position image of the human body.
The inventor finds that the prior art has at least the following problems: two times of flat scanning are needed, and the scanning process is complicated.
Disclosure of Invention
The present invention is directed to a CT scanning method and apparatus, and a CT scanner, which can solve at least one of the above-mentioned problems. The specific scheme is as follows:
according to an embodiment of the present invention, in a first aspect, the present invention provides a CT scanning method, including:
controlling the scanning bed to translate along the axis direction of the rack, and simultaneously controlling the rack to drive the bulb tube on the rack to rotate around the scanning bed;
when the rack rotates until the bulb tube is positioned at a first preset angle, controlling the bulb tube to pay off to obtain first image information, wherein the first image information comprises all human body images obtained when the bulb tube is positioned at the first preset angle;
when the rack rotates to the second preset angle of the bulb tube, controlling the bulb tube to pay off to obtain second image information, wherein the second image information comprises all human body images obtained when the bulb tube is positioned at the second preset angle;
and determining a human body image according to the first image information and the second image information.
Optionally, the rotation of the bulb and the translation of the gantry satisfy the following relationship:
the scanning bed translates within one rotation period of the bulb by a distance equal to the alignment width of the bulb.
Optionally, the determining the human body image according to the first image information and the second image information includes:
image building is carried out on the first image information to obtain an orthostatic horizontal scanning image;
image building is carried out on the second image information to obtain a side position horizontal scanning image;
and establishing a human body image according to the normal position horizontal scanning image and the side position horizontal scanning image.
Optionally, the establishing a human body image according to the normal horizontal scanning image and the lateral horizontal scanning image includes:
acquiring first direction data and second direction data of the human body according to the normal position horizontal scanning image;
acquiring data of a second direction and a third direction of the human body according to the side position horizontal scanning image;
and establishing a human body three-dimensional image according to the first direction data, the second direction data and the third direction data.
Optionally, the method further comprises:
acquiring a human body size curve graph through which rays need to penetrate according to the human body image information;
and comparing the human body size curve graph which needs to be penetrated by the ray with a modulation current curve, and determining whether the goodness of fit of the modulation current curve and the human body curve is within a preset value.
Optionally, the method further comprises:
acquiring a human body size curve graph through which rays need to penetrate according to the human body image information;
and determining a modulation current curve graph according to the human body size curve graph which needs to be penetrated by the ray.
Optionally, the determining a modulation current curve according to the human body size curve to be penetrated by the ray includes:
determining the corresponding relation between the size of the human body to be penetrated and the modulation current;
and determining a modulation current curve graph according to the human body size curve graph which needs to be penetrated by the ray and the corresponding relation between the human body size which needs to be penetrated and the modulation current.
Optionally, the determining a corresponding relationship between a size of a human body to be penetrated and a modulation current includes:
acquiring the maximum human body size and the minimum human body size to be penetrated from the human body size curve graph to be penetrated;
determining a maximum modulation current and a minimum modulation current;
and establishing a linear relation between the human body size to be penetrated and the modulation current according to the maximum human body size and the minimum human body size to be penetrated, the maximum modulation current and the minimum modulation current.
According to a second aspect, the present invention provides a CT scanner, comprising:
the motion control module is configured to control the scanning bed to translate along the axis direction of the rack and simultaneously control the rack to drive the bulb tube on the rack to rotate;
the first image acquisition module is configured to control the bulb tube to pay off and acquire first image information when the stand rotates to the position where the bulb tube is located at a first preset angle, wherein the first image information comprises all human body images obtained when the bulb tube is located at the first preset angle;
the second image acquisition module is configured to control the bulb tube to pay off and acquire second image information when the stand rotates to the second preset angle, wherein the second preset angle is the position of the bulb tube, and the second image information comprises all human body images acquired when the bulb tube is positioned at the second preset angle;
a human body image determination module configured to determine a human body image from the first image information and the second image information
According to a third aspect, the present invention provides a CT scanner, which performs scanning by using any of the CT scanning methods described above.
Compared with the prior art, the embodiment of the invention has the following technical effects:
according to the invention, the stand capable of rotating relative to the scanning bed is arranged, the bulb tube rotates to the first preset angle and the second preset angle along with the stand and is respectively paid off to obtain the first image information and the second image information, the scanning bed only needs to translate once to complete the acquisition of the front image information and the side image information of the human body, and the scanning process is simplified. Only one bulb tube is needed in the scanning process, and resources are saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is an application scenario diagram of a CT scanning method according to an embodiment of the present invention;
fig. 2 is a flowchart of a CT scanning method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first XX, second XX, third XX and the like may be used to describe in the embodiments of the present invention, these should not be limited to these terms. These terms are only used to distinguish one from another. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the invention.
The words "if", as used herein may be interpreted as "at the time" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, the recitation of an element by the phrase "comprising a" does not exclude the presence of additional like elements in a commodity or device comprising the element.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
According to an embodiment of the present invention, there is provided a scanning method, adapted to perform scanning by using a scanner as shown in fig. 1, the scanner including: the device comprises a frame 1, wherein the frame 1 is of a rotatable annular structure; the scanning bed 2 penetrates through the rack 1 and can translate along the axial direction of the rack 1; and the bulb tube 3 is arranged on the frame 1 and is used for collecting human body images. As shown in fig. 2, the scanning method includes:
s1, controlling the scanning bed 2 to translate along the axis direction of the stand 1, and simultaneously controlling the stand 1 to drive the bulb tube 3 on the stand to rotate around the scanning bed 2;
s2, when the rack 1 rotates until the bulb 3 is located at a first preset angle, controlling the bulb 3 to pay off to obtain first image information, wherein the first image information comprises all human body images obtained when the bulb 3 is located at the first preset angle;
s3, when the rack 1 rotates until the bulb 3 is located at a second preset angle, controlling the bulb 3 to pay off to obtain second image information, wherein the second image information comprises all human body images obtained when the bulb 3 is located at the second preset angle;
and S4, determining the human body image according to the first image information and the second image information.
In use, the CT scanning method provided by the embodiment of the invention allows a patient to lie on the scanning bed 2 and to move with the scanning bed 2 along the axial direction of the gantry 1. During the translation of the scanning bed 2, the bulb 3 rotates along with the frame 1. When the bulb 3 rotates to a first preset angle (for example, the bulb 3 is located at 0 ° right above the scanning bed 2, and counted in a clockwise direction, and the first preset angle may be 0 °) in one rotation period of the bulb 3, the bulb 3 is paid out, and a front image of a part of the human body opposite to the bulb 3 at that time is obtained. When the bulb 3 rotates to a second preset angle (the second preset angle can be 90 degrees or 270 degrees), the bulb 3 is paid off to obtain a side image of a part of the human body opposite to the bulb 3 at the moment. As the scanning bed 2 continuously translates, in the next period, the bulb 3 respectively obtains a front image and a side image of the next part of the human body at the first preset angle and the second preset angle. The scanning bed 2 is translated to enable the head of the human body to enter the machine frame 1 until the feet leave the machine frame 1 (or vice versa), and the machine frame 1 continuously rotates and repeats the processes for a plurality of times to complete a complete scanning process. The first image information obtained at the first preset angle and the second image information obtained at the second preset angle through the bulb 3 can respectively obtain the positive position image and the side position image of the human body, and complete human body image data is obtained.
It can be seen that, in the CT scanning method provided in this embodiment, the bulb 3 is disposed on the frame 1 capable of rotating relative to the scanning bed 2, and the bulb 3 is respectively paid off to obtain the first image information and the second image information when rotating to the first preset angle and the second preset angle along with the frame 1, so that the scanning bed 2 can complete the acquisition of the front image information and the side image information of the human body only by translating once, thereby simplifying the scanning process. Only one bulb tube 3 is needed in the scanning process, and resources are saved.
In some optional implementations of the present embodiment, in order to ensure continuity of the image data obtained by paying out the bulb 3, the rotation of the bulb 3 and the translation of the gantry 1 satisfy the following relationship: the scanning bed 2 translates over a period of one revolution of the bulb 3 by a distance equal to the collimation width. Wherein, the collimation width represents the range covered by one acquisition of the bulb 3 along the translation direction of the scanning bed 2. For example, for a 16 row tube core bulb 3, the coverage width of the individual tube core is 0.8mm, and the collimation width is 16 × 0.8 — 12.8 mm. By the arrangement, the human body image data collected in the adjacent periods of the bulb 3 can be attached seamlessly, and the human body image collection can be completed without overlapping and carelessly.
The frame 1 and the bulb 3 can move at a constant speed. Alternatively, the tube 3 may be set to perform the second payoff in each cycle at different times in a periodic motion, for example, after payoff at 0 °, the tube may be rotated at a first speed to 90 ° for the second payoff in the cycle, and rotated at a second speed from 90 ° to 360 ° (0 ° in the next cycle), and the ratio of the first speed to the second speed is greater than or equal to a predetermined value (e.g., 3, 5, 10, etc.), so that the human body images obtained by the two payoffs are the same part of the human body. This is not limited in this embodiment, as long as the bulb 3 can completely obtain the front image and the side image information of the human body.
In some optional image manners of this embodiment, the step S4 of determining the human body image according to the first image information and the second image information includes:
s401, imaging the first image information to obtain a normal horizontal scanning image. And splicing the first images in the first image information according to the acquisition sequence to obtain the normal position horizontal scanning image.
S402, imaging the second image information to obtain a side position horizontal scanning image. And splicing the second images in the second image information according to the acquisition sequence to obtain the side position horizontal scanning image.
And S403, establishing a human body image according to the normal horizontal scanning image and the lateral horizontal scanning image.
In the process, the normal horizontal scanning image and the lateral horizontal scanning image can be directly displayed as the human body image.
Alternatively, in step S403, the creating a human body image according to the normal horizontal scanning image and the lateral horizontal scanning image may further include:
s4031, extracting first direction and second direction data of the human body according to the normal position horizontal scanning image;
s4032, extracting second direction and third direction data of the human body according to the side horizontal scanning image;
and S4033, establishing a human body three-dimensional image according to the first direction data, the second direction data and the third direction data.
The first direction may be an X direction shown in fig. 1, that is, a left-right direction of the human body, the second direction may be a Y direction shown in fig. 1, that is, a direction from the head to the feet of the human body, and the third direction may be a Z direction shown in fig. 1, that is, a thickness direction when the human body lies down. The human body plane image obtained according to the normal horizontal scanning image is an (X, Y) coordinate system, the human body side image in the side horizontal scanning image is an (Y, Z) coordinate system, the (X, Y, Z) coordinate system can be obtained after the two are combined, and the human body three-dimensional image is established according to the (X, Y, Z) coordinate system.
In some optional implementations of this embodiment, the method further includes:
acquiring a human body size curve graph through which rays need to penetrate according to human body image information;
and comparing the human body size curve graph which needs to be penetrated by the ray with the modulation current curve, and determining whether the goodness of fit of the modulation current curve and the human body curve is within a preset value.
Through the above process, it can be determined whether the modulation current is reasonable.
According to the human body image information and the penetrating angle of the ray, a human body size curve graph which the ray needs to penetrate through can be directly obtained. For example, taking the three-dimensional image of the human body in the (X, Y, Z) coordinate system as an example, when the curve is penetrated from top to bottom (Z-axis direction), the Z-axis data can be directly used as the curve of the size of the human body to be penetrated. When the human body is penetrated from left to right (along the X-axis direction), the X-axis data can be directly used as a human body size curve graph to be penetrated.
When the comparison of the goodness of fit is carried out, a graph of the size of the human body to be penetrated and a curve of the modulation current are expressed in the same form. For example, the graph of the size of the human body to be penetrated can be a three-dimensional coordinate system: the X axis is data of the width direction of the human body, the Y axis is data of the length direction of the human body, and the Z axis is the size of the human body to be penetrated, namely the thickness data of the human body. At this time, the modulation current curve should be a three-dimensional coordinate system: the X-axis is data in the width direction of the human body, the Y-axis is data in the length direction of the human body, and the Z-axis is modulation current. At this time, the human body size graph and the modulation current curve are respectively in the form of curved surfaces.
Or, the size curve of the human body to be penetrated can also be a two-dimensional coordinate system: each point of the horizontal axis is human body data (X, Y), and the vertical axis is the size of the human body to be penetrated; at this time, the modulation current curve should be a two-dimensional coordinate system: each point on the horizontal axis means the human body data (X, Y), and the vertical axis means the modulation current.
When the curve graph of the size of the human body which needs to be penetrated by the ray is superposed and parallel with the curve of the modulation current, the goodness of fit is 100 percent. When the misalignment and the nonparallel are not met, the goodness of fit can be calculated by a preset rule, which is not described in detail in this embodiment.
In some optional implementations of this embodiment, the method further includes:
acquiring a human body size curve graph through which rays need to penetrate according to human body image information;
and determining a modulation current curve according to a human body size curve graph which needs to be penetrated by the ray.
The human body size curve graph through which the rays need to penetrate is obtained according to the human body image information and is the same as the human body size curve graph. The determined modulation current curve graph has higher goodness of fit with a human body size curve graph which needs to be penetrated by rays.
Further, a modulation current curve diagram is determined according to a human body size curve diagram to be penetrated by the ray, and the modulation current curve diagram comprises the following steps:
determining the corresponding relation between the size of the human body to be penetrated and the modulation current;
and determining a modulation current curve graph according to the curve graph of the size of the human body which needs to be penetrated by the ray and the corresponding relation between the size of the human body which needs to be penetrated and the modulation current.
The determining the corresponding relationship between the size of the human body to be penetrated and the modulation current comprises the following steps:
acquiring the maximum human body size and the minimum human body size to be penetrated from a human body size curve graph to be penetrated;
acquiring a maximum modulation current and a minimum modulation current;
and establishing a linear relation between the human body size to be penetrated and the modulation current according to the maximum human body size and the minimum human body size to be penetrated, the maximum modulation current and the minimum modulation current.
The modulation current is selected to be as small as possible on the premise of ensuring that the scanning effect can be achieved. For example, a current of 150mA for the minimum maximum body size to be penetrated and a current of 200mA for the maximum body size to be penetrated may be given, and a linear relationship between the body size to be penetrated and the modulation current may be determined based on the currents, and then a modulation current profile may be determined. The modulation current curve chart determined by the step is relatively consistent with the size of the human body, so that the scanning effect can be ensured, and the excessive radiation to the human body can be avoided.
After the modulation current curve is determined through the process, spiral scanning in a DOM mode can be subsequently performed according to the modulation current curve.
Example 2
The same structure in this embodiment as that in embodiment 1 is not described in detail, and the same structural parts have the same technical effects and are not described in detail. According to an embodiment of the present invention, there is provided a CT scanner, including:
the motion control module is configured to control the scanning bed 2 to translate along the axis direction of the rack 1 and simultaneously control the rack 1 to drive the bulb 3 thereon to rotate;
the first image acquisition module is configured to control the bulb tube 3 to pay off and acquire first image information when the rack 1 rotates until the bulb tube 3 is located at a first preset angle, wherein the first image information comprises all human body images obtained when the bulb tube 3 is located at the first preset angle;
the second image acquisition module is configured to control the bulb tube 3 to pay off and acquire second image information when the stand 1 rotates until the bulb tube 3 is located at a second preset angle, wherein the second image information comprises all human body images obtained when the bulb tube 3 is located at the second preset angle;
a human body image determination module configured to determine a human body image according to the first image information and the second image information.
It can be seen that, the CT scanning device provided by this embodiment, through setting up 2 pivoted frames 1 of relatively scanning bed, the bulb 3 is unwrapped wire respectively and is obtained first image information and second image information when presetting the angle along with frame 1 rotation to first preset angle and second, and scanning bed 2 only need the translation once can accomplish the collection of human front and side image information, has simplified the scanning process. Only one bulb tube 3 is needed in the scanning process, and resources are saved.
In some optional implementations of the present embodiment, the CT scanning apparatus may further include an angle acquisition module, configured to acquire a rotation angle of the bulb 3. The angle acquisition module can acquire the turned angle of frame 1 and bulb 3 through the angle sensor who sets up in frame 1, perhaps can confirm the turned angle of frame 1 and bulb 3 through the pulse number that acquires the driving piece of frame 1, and then unwrapping wire when bulb 3 reaches first angle of predetermineeing and the second angle of predetermineeing.
Example 3
The same structures as those in embodiments 1-2 are not described in detail, and the same structural parts have the same technical effects and are not described in detail. According to an embodiment of the present invention, a CT scanner is provided, which includes a CT scanning method as shown in example 1 to scan a human body.
The CT scanner provided by the embodiment can rotate the ground rack 1 relative to the scanning bed 2 through the arrangement, the bulb tube 3 rotates to the first preset angle and the second preset angle along with the rack 1, and then the bulb tube is respectively paid off to obtain the first image information and the second image information, the scanning bed 2 only needs to be translated once to complete the acquisition of the front image information and the side image information of the human body, and the scanning process is simplified. Only one bulb tube 3 is needed in the scanning process, and resources are saved.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The system or the device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The above examples are only intended to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (10)
1. A scanning method, comprising:
controlling the scanning bed to translate along the axis direction of the rack, and simultaneously controlling the rack to drive the bulb tube on the rack to rotate around the scanning bed;
when the rack rotates until the bulb tube is positioned at a first preset angle, controlling the bulb tube to pay off to obtain first image information, wherein the first image information comprises all human body images obtained when the bulb tube is positioned at the first preset angle;
when the rack rotates to the second preset angle of the bulb tube, controlling the bulb tube to pay off to obtain second image information, wherein the second image information comprises all human body images obtained when the bulb tube is positioned at the second preset angle;
and determining a human body image according to the first image information and the second image information.
2. The method of claim 1, wherein the rotation of the bulb and the translation of the gantry satisfy the following relationship:
the scanning bed translates within one rotation period of the bulb by a distance equal to the alignment width of the bulb.
3. The method of claim 2, wherein determining the image of the human body from the first image information and the second image information comprises:
image building is carried out on the first image information to obtain an orthostatic horizontal scanning image;
image building is carried out on the second image information to obtain a side position horizontal scanning image;
and establishing a human body image according to the normal position horizontal scanning image and the side position horizontal scanning image.
4. The method of claim 3, wherein said creating a body image from said normal scout image and said lateral scout image comprises:
acquiring first direction data and second direction data of the human body according to the normal position horizontal scanning image;
acquiring data of a second direction and a third direction of the human body according to the side position horizontal scanning image;
and establishing a human body three-dimensional image according to the first direction data, the second direction data and the third direction data.
5. The method of claim 1, further comprising:
acquiring a human body size curve graph through which rays need to penetrate according to the human body image information;
and comparing the human body size curve graph which needs to be penetrated by the ray with a modulation current curve, and determining whether the goodness of fit of the modulation current curve and the human body curve is within a preset value.
6. The method of claim 1, further comprising:
acquiring a human body size curve graph through which rays need to penetrate according to the human body image information;
and determining a modulation current curve graph according to the human body size curve graph which needs to be penetrated by the ray.
7. The method of claim 6, wherein determining a modulation current profile from a profile of a size of a human body to be penetrated by the radiation comprises:
determining the corresponding relation between the size of the human body to be penetrated and the modulation current;
and determining a modulation current curve graph according to the human body size curve graph which needs to be penetrated by the ray and the corresponding relation between the human body size which needs to be penetrated and the modulation current.
8. The method of claim 7, wherein determining the correspondence between the size of the human body to be penetrated and the modulation current comprises:
acquiring the maximum human body size and the minimum human body size to be penetrated from the human body size curve graph to be penetrated;
determining a maximum modulation current and a minimum modulation current;
and establishing a linear relation between the human body size to be penetrated and the modulation current according to the maximum human body size and the minimum human body size to be penetrated, the maximum modulation current and the minimum modulation current.
9. A CT scanner, comprising:
the motion control module is configured to control the scanning bed to translate along the axis direction of the rack and simultaneously control the rack to drive the bulb tube on the rack to rotate;
the first image acquisition module is configured to control the bulb tube to pay off and acquire first image information when the stand rotates to the position where the bulb tube is located at a first preset angle, wherein the first image information comprises all human body images obtained when the bulb tube is located at the first preset angle;
the second image acquisition module is configured to control the bulb tube to pay off and acquire second image information when the stand rotates to the second preset angle, wherein the second preset angle is the position of the bulb tube, and the second image information comprises all human body images acquired when the bulb tube is positioned at the second preset angle;
a human body image determination module configured to determine a human body image according to the first image information and the second image information.
10. A CT scanner for performing a scan using the CT scanning method according to any one of claims 1 to 8.
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