CN106923826B - Magnetic resonance imaging method and system - Google Patents
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Abstract
The invention discloses a magnetic resonance imaging method, which comprises the following steps: s1, acquiring a magnetic resonance signal of the detected part at the initial scanning time, reconstructing to obtain an initial magnetic resonance image, and acquiring corresponding initial position information; s2, acquiring a magnetic resonance signal of the detected part at the current scanning time, reconstructing the magnetic resonance signal to obtain a current magnetic resonance image, and acquiring corresponding current position information; s3, displaying the initial position information and the current position information in real time; and S4, comparing the current position information with the initial position information, and judging whether the current magnetic resonance image meets the requirements. The invention also discloses a magnetic resonance imaging system. The invention obtains the movement condition of the detected part based on the acquired scanning image, updates and displays the movement condition in real time, and helps an operator to quickly judge the movement condition of the detected part.
Description
Technical Field
The present invention relates to the field of magnetic resonance imaging, and in particular, to a method and system for magnetic resonance imaging.
Background
The numerous advantages of radiationless, multi-dimensional and multi-parameter imaging of magnetic resonance make magnetic resonance imaging one of the important means for clinical medical examination, providing very valuable diagnostic information for clinical medicine. The magnetic resonance is very sensitive to the examination of software tissues, not only can display the morphological information of human anatomy structures, but also can reflect certain physiological and biochemical information of human tissues, and if the magnetic resonance imaging method can be applied to heart dynamic imaging, brain function imaging, human motion imaging and cardiovascular and cerebrovascular rapid imaging, the diagnosis accuracy of dynamic magnetic resonance imaging such as heart dynamic imaging, brain function imaging, human motion imaging and cardiovascular and cerebrovascular rapid imaging can be greatly improved.
Dynamic magnetic resonance scanning techniques such as blood oxygen level dependent functional magnetic resonance (BOLD fMRI), dynamic susceptibility contrast perfusion weighted imaging (DSC PWI), Arterial Spin Labeling (ASL) and other similar techniques require repeated acquisition of a series of images of the examined area continuously, with a single scan of the images typically taking 1-3 seconds (typically no more than 10 seconds) to periodically acquire whole brain images at multiple time points. The total scan time is typically 1-10 minutes, and thus image blurring or image artifacts are often caused by the subject's motion during the imaging process. When the motion amplitude is small, the influence of the motion can be approximately eliminated by motion calibration calculation; however, when the motion amplitude is too large, the image calibration in the post-processing stage may also fail, or more seriously, image artifacts and calculation errors may be caused, which may result in the data of the scan and even the scan of the whole subject being invalidated. In this case, the group data can only be discarded or re-collected, resulting in a significant waste of time and resources. Therefore, it is important to detect and display the motion in real time during the dynamic magnetic resonance scanning process.
The current method for evaluating the motion situation in the dynamic magnetic resonance image comprises the following steps: 1) displaying the scanned images in a real-time updating manner, and subjectively judging whether obvious motion exists by observing the images by an operator; 2) after the scanning is finished, judging whether obvious motion exists or not by sequentially turning over the images of all time points; 3) after the scanning is finished, selecting a region of interest (ROI) on the image, and observing a time signal curve of the ROI to judge whether the image signal is influenced by motion correlation; 4) after the scanning is completed, the motion parameters in the image are calculated by using various post-processing image registration algorithms (provided in the platforms such as SPM, FSL, FREESurfer, AFNI, etc.).
US patent US2013035588 discloses methods, systems, and computer readable media for therapy planning using magnetic resonance imaging to track motion or position of a treatment region for multiple cycles over time using MRI for comparison with surrogate motion or signals to establish surrogate-to-tumor correspondence. The motion of the target is compared to the surrogate motion for determining whether a change in position of the target in the cycle results in inaccuracy of the gating treatment. The invention still can not directly observe the movement of the detected person in real time, has certain error when using the substitute and has complex device.
Disclosure of Invention
In order to solve the technical problems, the invention can directly display the real-time motion condition in the dynamic magnetic resonance scanning, help the scanning operator to quickly judge the motion condition of the detected part, and can stop the current scanning in time when the motion amplitude exceeds the acceptable range, thereby preventing more time and resources from being wasted.
The invention provides a magnetic resonance imaging method, which comprises the following steps:
s1, acquiring a magnetic resonance signal of the detected part at the initial scanning time, reconstructing to obtain an initial magnetic resonance image, and acquiring corresponding initial position information;
s2, acquiring a magnetic resonance signal of the detected part at the current scanning time, reconstructing the magnetic resonance signal to obtain a current magnetic resonance image, and acquiring corresponding current position information;
s3, displaying the initial position information and the current position information in real time;
and S4, comparing the current position information with the initial position information, and judging whether the current magnetic resonance image meets the requirements.
Further, the position information includes a time parameter, an image corresponding to the time parameter, and a position parameter.
Further, the step S4 specifically includes:
s41, calculating the current position parameter and the initial position parameter to obtain a position deviation;
and S42, comparing the position deviation with a preset deviation threshold, and when the position deviation is greater than the preset deviation threshold, judging that the position deviation does not meet the requirement and sending a reminding signal.
Further, the method further comprises the steps of establishing a first chart of the position parameters changing along with the time parameters according to the position information, and displaying the collected position information in the first chart in real time.
Further, the method further comprises the steps of establishing a second chart of the position deviation changing along with the time parameter, and displaying the obtained position deviation information in the second chart in real time.
Further, the reminding signal in the step S42 is to change the color of the first chart or the second chart, or highlight the first chart or the second chart.
Further, the position parameters include three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount, respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount, respectively.
Further, the reminding signal is an acoustic and optical alarm signal.
Accordingly, the invention provides a system for magnetic resonance imaging, which is characterized by comprising an acquisition module, an image reconstruction module, a display module and a processing module,
the acquisition module is used for acquiring magnetic resonance signals of the detected part at initial time and current time and acquiring corresponding initial position information and current position information;
the image reconstruction module is used for reconstructing images of the magnetic resonance signals at the initial scanning time and the current scanning time to obtain corresponding initial magnetic resonance images and current magnetic resonance images;
the display module is used for displaying the current position information and the initial position information in real time;
and the processing module is used for comparing the current position information with the initial position information and judging whether the current magnetic resonance image meets the requirements or not.
Further, the position information includes a time parameter, an image corresponding to the time parameter, and a position parameter.
Further, the processing module is specifically configured to calculate a current position parameter and an initial position parameter to obtain a position deviation, compare the position deviation with a preset deviation threshold, and when the position deviation is greater than the preset deviation threshold, determine that the position deviation does not meet the requirement, and send a warning signal.
Further, the system also comprises a chart establishing module;
the chart establishing module is used for establishing a first chart and a second chart, the first chart is a chart of the position parameter changing along with the time parameter according to the position information, and the second chart is a chart of the position deviation changing along with the time parameter;
the display module is used for displaying the position information of the detected part, the first chart and the second chart in real time.
Further, the reminding signal is to change the displayed color of the first chart or the second chart or highlight the first chart or the second chart.
Further, the position parameters include three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount, respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount, respectively.
The magnetic resonance imaging and system of the invention has the following beneficial effects:
1. the invention obtains the motion condition of the detected part based on the acquired scanning image, displays the motion condition in real time and helps an operator to quickly judge the motion condition of the detected part.
2. The invention can change the color of the first chart or the second chart or highlight the first chart or the second chart to cause visual alarm to remind operators of paying attention, can also remind directly through audio signals, warning lamps or character display, can stop current scanning in time when the motion amplitude exceeds an acceptable range, and prevents more time and resources from being wasted.
3. The invention can not perform any interference on scanning, and whether to terminate scanning or continue scanning is judged by an operator, so the practicability is strong.
4. The position parameters of the invention comprise three translation amounts and three rotation amounts, the motion of the detected person in each direction can be observed in real time, the detection information is sufficient, and the precision is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Figure 1 is a flow chart of magnetic resonance imaging of the present invention;
figure 2 is a block diagram of magnetic resonance imaging of the present invention;
FIG. 3 is a time-based motion curve of a BOLD EPI image obtained by SPM post-processing, wherein the position parameters are three translation amounts;
FIG. 4 is a graph of the movement of a BOLD EPI image over time, obtained by SPM post-processing, where the position parameter is three rotations;
fig. 5 is a display expectation diagram of real-time motion detection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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 first embodiment is as follows:
the embodiment of the invention provides a magnetic resonance imaging method, which comprises the following steps:
s1, acquiring a magnetic resonance signal of the detected part at the initial scanning time, reconstructing to obtain an initial magnetic resonance image, acquiring corresponding initial position information, and displaying the corresponding initial position information and a first chart;
the initial position information comprises an initial position parameter P0The time parameter T corresponding to the initial position parameter0The image corresponding to the time parameter is marked as an initial image, and the first chart is a chart of the initial position parameter changing along with the time parameter;
s2, acquiring a magnetic resonance signal of the detected part at the current scanning time, reconstructing to obtain a current magnetic resonance image, acquiring corresponding current position information, and displaying a first chart and image change information;
the current position information comprises a current position parameter PnThe time parameter T corresponding to the current position parameternAnd said timeThe image corresponding to the parameter, the image is marked as the current image,
the first chart is a chart of the change of the current position parameter along with the time parameter, and is a curve chart of the change of the position parameter along with the time parameter,
the image change information is comparison information of the current image and the initial image, and the comparison information is that the current image and the initial image are displayed on an operation interface at the same time, so that an operator can conveniently and visually see the image change of the detected part;
s3, comparing the current position information with the initial position information, and determining whether the current magnetic resonance image meets the requirements, specifically:
according to the current position parameter PnAnd an initial position parameter P0Calculating the position deviation delta P between the current position and the initial position, and comparing the position deviation delta P with a preset deviation threshold value delta PmaxThe comparison is carried out in such a way that,
when Δ P is less than or equal to Δ PmaxIf yes, the step S2 is returned to;
when Δ P>ΔPmaxAnd sending a reminding signal, wherein the reminding signal is a curve graph which changes or highlights the position parameter along with the change of the time parameter.
The position parameters comprise three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount respectively.
And performing registration calculation on the image at the current time point and the image at the initial scanning time point to obtain a translation amount and a rotation amount which need to be changed for aligning the image at the current time point and the image at the initial time point. I.e. the position deviation is obtained based on the acquired image itself without means outside the imaging device, and the specific algorithm is prior art, including many different algorithm types, which will be known to the skilled person and will not be described herein.
The basic principle of calculating the position parameters in the invention is that the detected part is taken as a rigid body, namely, the detected part cannot deform, the current image and the initial image are calculated to obtain six position parameters, the six position parameters are displayed on an operation interface of a magnetic resonance imaging machine and are updated and displayed in real time, the position parameters comprise three translation amounts and three rotation amounts, and if the detected part does not move, the six position parameters are zero or close to zero. For example, after n time parameter data have been scanned, six time curves are displayed on the operation interface, each curve corresponds to a translation amount or a rotation amount, and n-1 points are provided on the curve, when the data of the (n + 1) th point is acquired and the position parameter is calculated, the operation interface is updated, and n points are currently displayed on the curve.
As shown in fig. 3-4, if the head movement is fast, its position parameter is similar to the spike in fig. 3 and 4, and if the head movement is slow, its position parameter is similar to the curve drift in fig. 3 and 4.
As shown in fig. 5, the time curve of the position parameter in the method and system of the present invention is displayed in the dynamic display window in real time, and the graph obtained by real-time scanning can be updated and displayed in the dynamic display window at the same time.
Correspondingly, the embodiment of the invention also provides a magnetic resonance imaging system, which comprises an acquisition module, a display module and a processing module, wherein the processing module comprises a computing unit, a comparison unit and a control unit,
the acquisition module is used for acquiring and displaying the position information of the detected part in the magnetic resonance imaging scanning process, wherein the position information comprises initial position information and current position information, and the initial position information comprises an initial position parameter P0The time parameter T corresponding to the initial position parameter0The image corresponding to the time parameter is marked as an initial image, and the current position information comprises a current position parameter PnThe time parameter T corresponding to the initial position parameternThe image corresponding to the time parameter is marked as a current image;
the display module is used for displaying the position information, a first chart and image change information of the detected part, wherein the first chart is a chart of position parameters changing along with time parameters, the image change information is comparison information of a current image and an initial image, and the comparison information is that the current image and the initial image are displayed on an operation interface at the same time, so that an operator can conveniently and visually see the image change of the detected part;
the calculation unit is used for calculating the current position parameter P according to the current position parameternAnd an initial position parameter P0Calculating the position deviation delta P between the current position and the initial position;
the comparison unit is used for comparing the position deviation delta P with a preset deviation threshold value delta PmaxComparing;
the control unit is used for controlling the control unit when the delta P is less than or equal to the delta PmaxIf so, controlling to obtain and display the current position information of the detected part again, and simultaneously displaying a first chart and image change information; when Δ P>ΔPmaxAnd sending a reminding signal, wherein the reminding signal is a curve graph which changes or highlights the position parameter along with the change of the time parameter.
The position parameters comprise three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount respectively.
Example two:
the embodiment of the invention provides a magnetic resonance imaging method, and the method of the embodiment is different from the method of the first embodiment in that:
step S2 is: acquiring and displaying the current position information of the detected part after a preset time interval, and simultaneously displaying a first chart, a second chart and image change information, or
Acquiring and displaying the current position information of the detected part after a preset time interval, and simultaneously displaying a second chart and image change information,
the second graph is a graph of the position deviation changing along with time parameters, the graph is a graph of the position deviation changing along with the time parameters, and the first graph and the image change information are the same as those in the first embodiment;
in step S3, when Δ P>ΔPmaxAnd sending a reminding signal, wherein the reminding signal is a curve graph which changes or highlights the position parameter along with the change of the time parameter, or a chart which changes or highlights the position deviation along with the change of the time parameter, or the two curves are changed or highlighted simultaneously.
Accordingly, an embodiment of the present invention further provides a system for magnetic resonance imaging, which is different from the system in the second embodiment in that: the display module displays a second chart, which is a chart of the position deviation changing with time parameters, in addition to the position information, the first chart and the image change information, and specifically is a graph of the position deviation changing with time parameters, or
The display module displays a second chart besides the image change information, wherein the second chart is a chart of the position deviation changing along with the time parameter, and the chart is a curve chart of the position deviation changing along with the time parameter.
In the system, the control unit is used for controlling the power supply when the delta P is less than or equal to the delta PmaxThen, the current position information of the detected part is obtained and displayed again, and the first chart, the second chart and the image change information are displayed at the same time, or
The control unit is used for controlling the control unit when the delta P is less than or equal to the delta PmaxIf so, controlling to obtain and display the current position information of the detected part again, and simultaneously displaying a second chart and image change information;
when Δ P>ΔPmaxAnd sending out a reminding signal, wherein the reminding signal is a curve graph for changing or highlighting the position parameter to change along with the time parameter, or a chart for changing or highlighting the position deviation to change along with the time parameter, or two curves are changed or highlighted simultaneously.
Example three:
the invention provides a method of magnetic resonance imaging, the method comprising the steps of:
s1, acquiring to be testedObtaining an initial magnetic resonance image after reconstructing a magnetic resonance signal of a measured part at an initial scanning time, acquiring corresponding initial position information, and simultaneously displaying the initial position information, wherein the initial position information comprises an initial position parameter P0The time parameter T corresponding to the initial position parameter0The image corresponding to the time parameter is marked as an initial image;
s2, acquiring the magnetic resonance signal of the detected part at the current scanning time after a preset time interval, obtaining the current magnetic resonance image after reconstruction, acquiring the corresponding current position information, and simultaneously displaying the current position information, wherein the current position information comprises a current position parameter PnThe time parameter T corresponding to the current position parameternThe image corresponding to the time parameter is marked as a current image;
s3, according to the current position parameter PnAnd an initial position parameter P0Calculating the position deviation delta P between the current position and the initial position, and comparing the position deviation delta P with a preset deviation threshold value delta PmaxThe comparison is carried out in such a way that,
when Δ P is less than or equal to Δ PmaxIf yes, the step S2 is returned to;
when Δ P>ΔPmaxAnd sending out a reminding signal, wherein the reminding signal is an audio signal or a signal sent out by a warning lamp.
The position parameters comprise three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount respectively.
Correspondingly, the invention also provides a magnetic resonance imaging system, which comprises an acquisition module, a display module and a processing module, wherein the processing module comprises a computing unit, a comparison unit and a control unit,
the acquisition module is used for acquiring and displaying the position information of the detected part in the magnetic resonance imaging scanning process, the position information comprises initial position information and current position information,
the initial position information packetIncluding an initial position parameter P0The time parameter T corresponding to the initial position parameter0An image corresponding to the time parameter, the image being recorded as an initial image,
the current position information comprises a current position parameter PnThe time parameter T corresponding to the current position parameternThe image corresponding to the time parameter is marked as a current image;
the display module is used for displaying the position information of the detected part;
the calculation unit is used for calculating the current position parameter P according to the current position parameternAnd an initial position parameter P0Calculating the position deviation delta P between the current position and the initial position;
the comparison unit is used for comparing the position deviation delta P with a preset deviation threshold value delta PmaxComparing;
the control unit is used for controlling the control unit when the delta P is less than or equal to the delta PmaxIf so, controlling to acquire and display the current position information of the detected part again; when Δ P>ΔPmaxAnd sending out a reminding signal, wherein the reminding signal is an audio signal or a signal sent out by a warning lamp.
The position parameters comprise three translation amounts and three rotation amounts, the three translation amounts are an x-axis translation amount, a y-axis translation amount and a z-axis translation amount respectively, and the three rotation amounts are an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount respectively.
The magnetic resonance imaging and system of the invention has the following beneficial effects:
1. the invention obtains the motion condition of the detected part based on the acquired scanning image, displays the motion condition in real time and helps an operator to quickly judge the motion condition of the detected part.
2. According to the invention, the displayed color of the first chart or the second chart is changed, or the first chart or the second chart is highlighted, so that a visual alarm is generated to remind an operator of paying attention, and the prompt can be directly realized through an audio signal or a warning lamp, so that the current scanning can be stopped in time when the motion amplitude exceeds an acceptable range, and more time and resources are prevented from being wasted.
3. The invention can not perform any interference on scanning, and whether to terminate scanning or continue scanning is judged by an operator, so the practicability is strong.
4. The position parameters of the invention comprise three translation amounts and three rotation amounts, the motion of the detected person in each direction can be observed in real time, and the detection precision is high.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. A method of magnetic resonance imaging, comprising the steps of:
s1, acquiring a magnetic resonance signal of the detected part at the initial scanning time, reconstructing to obtain an initial magnetic resonance image, acquiring corresponding initial position information, and displaying the corresponding initial position information and a first chart on an operation interface at the same time; the initial position information comprises an initial position parameter, a time parameter corresponding to the initial position parameter and an initial image; the initial image is an image corresponding to the time parameter; the first chart is a chart of the initial position parameter changing along with time parameters;
s2, acquiring a magnetic resonance signal of the detected part at the current scanning time, reconstructing the magnetic resonance signal to obtain a current magnetic resonance image, acquiring corresponding current position information, and simultaneously displaying a first chart, a second chart and image change information on an operation interface, or simultaneously displaying the second chart and the image change information on the operation interface; the current position information comprises a current position parameter, a time parameter corresponding to the current position parameter and a current image, and the current image is an image corresponding to the time parameter; the image change information is comparison information of the current image and the initial image, and the comparison information is that the current image and the initial image are displayed on an operation interface simultaneously; the second chart is a chart of the position deviation of the current position parameter and the initial position parameter along with the change of time parameters;
s3, displaying the initial position information and the current position information in real time;
s4, comparing the current position information with the initial position information, and judging whether the current magnetic resonance image meets the requirements; the step S4 specifically includes: s41, calculating the current position parameter and the initial position parameter to obtain a position deviation; s42, comparing the position deviation with a preset deviation threshold value, and returning to the step S2 when the position deviation is not greater than the preset deviation threshold value; when the position deviation is larger than a preset deviation threshold value, judging that the current magnetic resonance image does not meet the requirement, and sending a reminding signal; the reminding signal is a sound, light or character alarm signal;
the method further comprises the following steps:
establishing a first chart of initial position parameters changing along with time parameters according to the initial position information, and displaying the acquired initial position information in the first chart in real time;
and establishing a second chart of the position deviation changing along with the time parameters, and displaying the obtained position deviation information in the second chart in real time.
2. The method of claim 1, wherein the reminder of step S42 is to change the color of the first or second chart display or to highlight the first or second chart display.
3. The method of magnetic resonance imaging according to any one of claims 1-2, wherein the position parameters include three translation amounts and three rotation amounts, the three translation amounts being an x-axis translation amount, a y-axis translation amount and a z-axis translation amount, respectively, and the three rotation amounts being an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount, respectively.
4. A magnetic resonance imaging system is characterized by comprising an acquisition module, an image reconstruction module, a chart establishing module, a display module and a processing module,
the acquisition module is used for acquiring magnetic resonance signals of the detected part at initial scanning time and current scanning time and acquiring corresponding initial position information and current position information; the initial position information comprises an initial position parameter, a time parameter corresponding to the initial position parameter and an initial image; the initial image is an image corresponding to the time parameter; the current position information comprises a current position parameter, a time parameter corresponding to the current position parameter and a current image, and the current image is an image corresponding to the time parameter;
the image reconstruction module is used for reconstructing images of the magnetic resonance signals at the initial scanning time and the current scanning time to obtain corresponding initial magnetic resonance images and current magnetic resonance images;
the chart establishing module is used for establishing a first chart and a second chart, the first chart is a chart of initial position parameters changing along with time parameters according to initial position information, and the second chart is a chart of position deviation of the current position parameters and the initial position parameters changing along with time parameters;
the display module is used for displaying the current position information, the initial position information, the first chart, the second chart and image change information on an operation interface in real time; the first chart is a chart of the initial position parameter changing along with time parameters; the image change information is comparison information of the current image and the initial image, and the comparison information is that the current image and the initial image are displayed on an operation interface simultaneously;
the processing module is used for comparing the current position information with the initial position information and judging whether the current magnetic resonance image meets the requirements or not; the processing module comprises a computing unit, a comparing unit and a control unit; the calculating unit is used for calculating the position deviation of the current position and the initial position according to the current position parameter and the initial position parameter, and the comparing unit is used for comparing the position deviation with a preset deviation threshold value; the control unit is used for controlling to acquire and display the current position information of the detected part again when the position deviation is not larger than a preset deviation threshold; when the position deviation is larger than a preset deviation threshold value, judging that the current magnetic resonance image does not meet the requirement, and sending a reminding signal; the reminding signal is a sound, light or character alarm signal.
5. The system of claim 4, wherein the reminder signal is to change a color of a display of the first or second chart or to highlight the first or second chart.
6. The system of magnetic resonance imaging according to any one of claims 4-5, wherein the position parameters include three translation amounts and three rotation amounts, the three translation amounts being an x-axis translation amount, a y-axis translation amount and a z-axis translation amount, respectively, and the three rotation amounts being an x-axis rotation amount, a y-axis rotation amount and a z-axis rotation amount, respectively.
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| CN109447044B (en) * | 2018-12-25 | 2023-10-27 | 上海联影医疗科技股份有限公司 | Scanning control method and system |
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