CN109171724B - SAR value determination method, device and system for magnetic resonance imaging and storage medium - Google Patents
SAR value determination method, device and system for magnetic resonance imaging and storage medium Download PDFInfo
- Publication number
- CN109171724B CN109171724B CN201810848135.1A CN201810848135A CN109171724B CN 109171724 B CN109171724 B CN 109171724B CN 201810848135 A CN201810848135 A CN 201810848135A CN 109171724 B CN109171724 B CN 109171724B
- Authority
- CN
- China
- Prior art keywords
- scanning
- pressure
- pressure sensor
- determining
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002595 magnetic resonance imaging Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000010586 diagram Methods 0.000 claims description 23
- 238000004590 computer program Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 13
- 238000003709 image segmentation Methods 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000000877 morphologic effect Effects 0.000 claims 2
- 238000004364 calculation method Methods 0.000 claims 1
- 230000011218 segmentation Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000000968 medical method and process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- High Energy & Nuclear Physics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
According to the SAR value determining method, device and system for magnetic resonance imaging and the storage medium, the pressure value of the scanning part of the scanning object is obtained through the pressure sensors, the quality of the scanning part is obtained according to the pressure values, and the SAR value corresponding to the scanning part is determined according to the quality of the scanning part.
Description
Technical Field
The present invention relates to the field of magnetic resonance imaging, and in particular, to a method, apparatus, system and storage medium for determining SAR values for magnetic resonance imaging.
Background
In the magnetic resonance imaging technology, as the field intensity of the main magnetic field of magnetic resonance increases, the power of the radio frequency pulse also increases, and the energy loaded by the radio frequency pulse is released in a form of heat and is locally absorbed by a human body, so that the body temperature is increased, and even local thermal damage is caused, therefore, the specific absorption rate (Specific Absorption Rate, SAR for short) is introduced and used for representing the radio frequency energy absorbed by the human body in unit weight in unit time.
The international electrotechnical commission (International Electro Technical Commission, IEC for short) specifies that SAR values in magnetic resonance imaging cannot exceed a specified safety threshold and that there are different safety thresholds for different parts of the human body. For example, when the SAR value of the scan region is greater than or equal to a safety threshold, the magnetic resonance imaging (Magnetic ResonanceImaging, MRI) apparatus automatically stops scanning to avoid damage to the human body. At present, the SAR value is generally obtained by the following steps: the doctor inquires the weight of the patient, estimates the weight of the scanning position according to the weight distribution rule of the body and the experience of the doctor, and then estimates the SAR value of the position according to the weight of the scanning position.
However, the above method has high requirement on the experience of doctors, and the weight of the estimated scanning position is inaccurate due to the deviation of personal weight and the difference of weight distribution of different patients, so that the accuracy of the obtained SAR value is low, thereby being unfavorable for the imaging of MRI scanning.
Disclosure of Invention
Based on this, it is necessary to provide a method, a device, a system and a storage medium for determining SAR values of magnetic resonance imaging, aiming at the technical problems that the SAR value estimation accuracy is low and the MRI scanning imaging is unfavorable because the weight of the scanning part estimated by a doctor is inaccurate due to the weight deviation and the weight distribution difference of individuals in the conventional technology.
A method of determining specific absorption rate SAR values for magnetic resonance imaging, the method comprising:
acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
acquiring the mass of the scanning part according to the pressure value;
and determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
In one embodiment, the acquiring, by the pressure sensor, the pressure value of the scanning portion of the scanning object includes:
acquiring position information of each pressure sensor;
determining a target pressure sensor according to the position information of each pressure sensor and the position information of the scanning part;
and acquiring a pressure value of the target pressure sensor.
In one embodiment, the determining the target pressure sensor according to the position information of the scanning position includes:
determining a pressure distribution map corresponding to the scanning object according to the position information of each pressure sensor;
according to the body state characteristic information of the scanning object, carrying out image segmentation processing on the pressure distribution map, and determining the human body part information corresponding to each pressure sensor;
determining the target pressure sensor according to instruction information input by a user and human body part information corresponding to each pressure sensor; the instruction information comprises human body part information corresponding to the scanning part.
In one embodiment, if there are at least two target pressure sensors, the acquiring the pressure value of the target pressure sensor includes:
acquiring a pressure value acquired by each target pressure sensor;
and summing all the pressure values acquired by the target pressure sensor to obtain the pressure value of the target pressure sensor.
In one embodiment, the acquiring the pressure value acquired by each target pressure sensor includes:
sending control instructions to each target pressure sensor;
and receiving a pressure value sent by each target pressure sensor according to the control instruction.
In one embodiment, the acquiring the pressure value acquired by each target pressure sensor includes:
determining a pressure value corresponding to the identification of the target pressure sensor from a pressure value set according to the corresponding relation between the identification of the pressure sensor and the pressure value; the pressure value set comprises pressure values acquired by all pressure sensors corresponding to the scanning object.
In one embodiment, the determining the SAR value corresponding to the scanning location according to the quality of the scanning location includes:
And determining the SAR value corresponding to the scanning position according to the quality of the scanning position, the magnetic field intensity and the radio frequency pulse signal intensity.
A magnetic resonance imaging apparatus, the apparatus comprising:
the first acquisition module is used for acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
the second acquisition module is used for acquiring the quality of the scanning part according to the pressure value;
and the determining module is used for determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
A magnetic resonance imaging system comprising: a magnetic resonance apparatus imaging apparatus and a computer apparatus; the computer device comprises a memory storing a computer program and a processor which when executing the computer program performs the steps of:
acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
acquiring the mass of the scanning part according to the pressure value;
and determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
Acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
acquiring the mass of the scanning part according to the pressure value;
and determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
According to the SAR value determining method, device and system and the storage medium for magnetic resonance imaging, provided by the invention, the pressure value of the scanning part of the scanning object can be obtained through the plurality of pressure sensors, the quality of the scanning part of the scanning object is obtained according to the pressure value, and the SAR value corresponding to the scanning part is determined according to the quality of the scanning part. According to the method, the pressure sensor is used for measuring the pressure value of the scanning part of the scanning object, the quality of the scanning part is converted according to the pressure value, the accuracy of the quality of the scanning part of the scanning object can be improved, the technical problem that in the prior art, doctors estimate the scanning part of the scanning object inaccurately according to personal experience, personal weight deviation and distribution difference is avoided, the computer equipment obtains the SAR value of the scanning part according to the obtained quality of the scanning part of the scanning object, the accuracy of the SAR value of the scanning part can be improved, and MRI scanning imaging is facilitated.
Drawings
FIG. 1 is a schematic diagram of a magnetic resonance imaging system according to the present invention;
FIG. 2 is a flow chart of a SAR value determination method for magnetic resonance imaging according to an embodiment;
fig. 3 is a flowchart of a SAR value determination method of magnetic resonance imaging according to another embodiment;
fig. 4 is a flowchart of a SAR value determination method of magnetic resonance imaging according to another embodiment;
fig. 5 is a flowchart of a SAR value determination method of magnetic resonance imaging according to another embodiment;
FIG. 6 is a schematic diagram of a magnetic resonance imaging apparatus according to an embodiment;
fig. 7 is a schematic structural diagram of a magnetic resonance imaging apparatus according to another embodiment;
fig. 8 is a schematic structural diagram of a magnetic resonance imaging apparatus according to another embodiment;
fig. 9 is a schematic structural diagram of a magnetic resonance imaging apparatus according to another embodiment;
fig. 10 is a block diagram of an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The SAR value determination method for magnetic resonance imaging can be applied to a magnetic resonance imaging system shown in figure 1, wherein the magnetic resonance imaging system comprises a computer device and a magnetic resonance imaging device. The computer device can communicate with the magnetic resonance imaging device in a wired communication mode or a wireless communication mode. When wireless communication is adopted, optionally, communication modes of infrared communication, bluetooth communication, 2G, 3G, 4G, 5G and the like can be adopted, which is not limited in the embodiment of the invention. Alternatively, the magnetic resonance imaging apparatus may be an experimental magnetic resonance imaging apparatus, a local magnetic resonance imaging apparatus or a whole-body magnetic resonance imaging apparatus; the system can also be a permanent magnet type magnetic resonance imaging device, a superconductive type magnetic resonance imaging device, a constant conduction type magnetic resonance imaging device or a hybrid type magnetic resonance imaging device, and can also be a low-field machine magnetic resonance imaging device, a middle-field machine magnetic resonance imaging device, a high-field machine magnetic resonance imaging device or an ultra-high-field machine magnetic resonance imaging device; other types of magnetic resonance imaging apparatus are also possible, such as: a magnetic resonance imaging apparatus for diagnosis, a magnetic resonance imaging apparatus dedicated for interventional therapy, and the like. The embodiment of the invention does not limit the type of the magnetic resonance imaging device.
The embodiment of the invention provides a SAR value determining method, device, system and storage medium for magnetic resonance imaging, which aim to solve the technical problems that in the prior art, the weight of a scanning part estimated by a doctor is inaccurate due to personal weight deviation and weight distribution difference, the SAR value estimation precision is low, and MR scanning imaging is not facilitated.
The execution subject of the method embodiment described below may be a magnetic resonance imaging apparatus or a computer apparatus, which may implement part or all of the SAR value determination for the above-described magnetic resonance imaging by software, hardware, or a combination of software and hardware. The following method embodiments are described taking the implementation subject as a computer device as an example.
The following describes the technical scheme of the present invention and how the technical scheme of the present invention solves the above technical problems in detail by examples and with reference to the accompanying drawings. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a flowchart of a method for determining SAR values of magnetic resonance imaging according to an embodiment, which relates to a specific process in which a computer device obtains pressure values of a scan region of a scan object through a plurality of pressure sensors, and obtains quality of the scan region according to the pressure values to determine SAR values of the scan region. As shown in fig. 2, the method includes:
S101, acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors.
It should be noted that in this embodiment, the plurality of pressure sensors may be disposed on an upper surface of a bed board of the magnetic resonance imaging apparatus or embedded inside the bed board; the surface of the flexible layer which is laid on the bed board or embedded in the flexible layer; the pressure sensor may be disposed on a support of the body of the scan subject in other manners, which is not limited in this embodiment, as long as the pressure sensor disposed on the support of the body of the scan subject can accurately acquire the pressure value of the scan site. Alternatively, the flexible layer may be a cushion, a blanket, or other objects placed on the surface of the bed board, which is not limited in this embodiment. Alternatively, the plurality of pressure sensors may be a plurality of piezoelectric sensors, or may be other types of pressure sensors, which is not limited in this embodiment.
Specifically, taking the example that the pressure sensor is arranged on the upper surface of the bed board of the magnetic resonance imaging device, in practical application, when the scanning object lies on the bed board, the computer device acquires the pressure value acquired by the pressure sensor corresponding to the scanning part of the scanning object in combination with the plurality of pressure sensors arranged on the upper surface of the bed board, alternatively, the mode that the computer device acquires the pressure value acquired by the pressure sensor can be that the computer device sends a control instruction to the pressure sensor to enable the pressure sensor to report the acquired pressure value, or the pressure sensor actively reports the acquired pressure value to the computer device, and the mode that the computer device acquires the pressure value acquired by the pressure sensor is not limited in this embodiment.
S102, acquiring the quality of the scanning part according to the pressure value.
In this embodiment, the method of acquiring the mass of the scan portion of the scan object by the computer device according to the pressure value may be a linear relationship between the pressure and the mass, or the computer device may acquire the mass of the scan portion of the scan object by the big data, or may be other methods, which are not limited in this embodiment, as long as the mass of the scan portion is acquired on the basis of the pressure value by scientific and reasonable logic. Wherein the linear relationship between the pressure and the mass is specifically: when the horizontal plane of the gravity center of the scanning part is parallel to the scanning bed board, the pressure=gravity=mass×9.8 n/kg; if the gravity center of the scanning part is positioned on an inclined plane, and the inclination angle alpha exists between the horizontal plane of the gravity center of the scanning part and the scanning bed board, the pressure=gravity×cos alpha=mass×9.8 n/kg×cos alpha. Alternatively, the horizontal plane in which the center of gravity of the scanning part is located and the bed board are in a parallel state or the inclination angle α exists may be automatically measured by a computer device according to a preset program, or may be reported to the computer device after the inclination angle α is detected by the magnetic resonance imaging device, or may be measured by other means, which is not limited in this embodiment.
Specifically, taking a linear relationship between the pressure value and the mass as an example, in practical application, based on the linear relationship between the pressure and the mass, the computer device substitutes the pressure value of the scanning part of the scanning object obtained in the step S101 into one of the formulas of the linear relationship according to the relationship between the horizontal plane and the horizontal plane where the center of gravity of the scanning part of the scanning object is located, so as to determine the mass corresponding to the scanning part. For example: when the horizontal plane of the gravity center of the scanning part of the scanning object is parallel to the bed board, substituting the obtained pressure value into the formula pressure=gravity=mass×9.8 n/kg by the computer equipment, and obtaining the mass of the scanning part; alternatively, when there is an inclination angle α between the horizontal plane in which the center of gravity of the scanning subject lies and the bed board, the computer apparatus substitutes the acquired pressure value into the formula pressure=gravity×cos α=mass×9.8 n/kg×cos α, and acquires the mass of the scanning subject.
S103, determining SAR values corresponding to the scanning parts according to the quality of the scanning parts.
Specifically, based on the quality of the scanning site of the scanning object determined in step S102 described above, the computer device may determine the SAR value of the scanning site of the scanning object according to the quality of the scanning site. Alternatively, the computer device may determine the SAR value of the scan site of the scan object by combining the quality of the scan site with a common medical method, or may determine the SAR value corresponding to the scan site by other methods, for example, according to a functional relationship between the quality of the scan site, the magnetic field strength, and the rf pulse signal strength; alternatively, the correspondence between the mass of the scanning location and the SAR value may be counted by machine learning, and the SAR value corresponding to the mass of each scanning location may be determined according to the correspondence. The method of determining the SAR corresponding to the scan site by the computer device according to the acquired quality of the scan site is not limited in this embodiment.
For example, in calculating the SAR value at 10S for a scan region of a scan object, the computer device automatically substitutes the quality of the acquired scan region of the scan object into the following formula: 10 sSAR= ((-5.96E-09) X) 4 -(2.08E-06)X 3 +0.0005681X 2 -0.04531x+1.638) peak_sar. Wherein X is the mass of the scanning part, peak_SAR is the Peak value of SAR values in the scanning time period, and 10sSAR values can be obtained by inputting the mass of the scanning part into the computer equipment according to the formula.
It should be noted that, in this embodiment, only one pressure sensor may be provided, so that, according to the pressure value acquired by the pressure sensor, based on the relationship between the pressure value and the mass, the computer device obtains the overall mass of the scanned object, and then, the computer device may determine the mass of the scanned portion of the scanned object according to the body state feature information, and further, according to the mass of the scanned portion, the computer device determines the SAR value of the scanned portion. The manner in which the computer device obtains the quality of the scanning portion of the scanning object according to the pressure value acquired by the pressure sensor and the manner in which the computer device determines the SAR value of the scanning portion according to the quality of the scanning portion of the scanning object may be any one of the above-mentioned embodiments, or may be other manners, which is not limited in this embodiment.
According to the SAR value determination method for the magnetic resonance imaging, the computer equipment obtains the pressure value of the scanning part of the scanning object through the plurality of pressure sensors, obtains the mass of the scanning part of the scanning object according to the pressure value, and determines the SAR value corresponding to the scanning part according to the mass of the scanning part. According to the method, the pressure sensor is used for measuring the pressure value of the scanning part of the scanning object, the quality of the scanning part is converted according to the pressure value, the accuracy of the quality of the scanning part of the scanning object can be improved, the technical problem that in the prior art, doctors estimate the scanning part of the scanning object inaccurately according to personal experience, personal weight deviation and distribution difference is avoided, the computer equipment obtains the SAR value of the scanning part according to the obtained quality of the scanning part of the scanning object, the accuracy of the SAR value of the scanning part can be improved, and MRI scanning imaging is facilitated.
Fig. 3 is a flowchart of a SAR value determining method of magnetic resonance imaging according to an embodiment, which relates to a specific process of acquiring a pressure value of a target pressure sensor by a computer device according to position information of each pressure sensor. On the basis of the embodiment shown in fig. 2, as shown in fig. 3, the step S101 includes:
S201, position information of each pressure sensor is acquired.
In this embodiment, the position information of each pressure sensor may be the position information of each pressure sensor on the couch board or in the couch board, and each pressure sensor may be a partial area distributed on the couch board of the magnetic resonance imaging apparatus or a partial area embedded in the couch board according to a preset rule, or may be a supporting piece uniformly distributed on the upper surface of the couch board according to a preset rule or embedded in the supporting piece. The present embodiment is not limited to this, as to the area information of each pressure sensor on or inside the support. The preset rule may be an array distribution rule, or a rule that is distributed in a targeted manner according to outlines of different scanning positions of the scanned object body, which is not limited in this embodiment.
Optionally, the manner in which the computer device obtains the position information of the pressure sensor may be that the position coordinate of the pressure sensor in the scan object coordinate system is obtained according to the preset rule, or may be that the pressure sensor actively reports the position coordinate while reporting the pressure value to the computer device, and the manner in which the computer device obtains the position information of the pressure sensor is not limited in this embodiment.
S202, determining a target pressure sensor according to the position information of each pressure sensor and the position information of the scanning part.
In this embodiment, the position information of the scanning location may be a set of position coordinates of the scanning location in the scanning target coordinate system, or may be a range of areas formed by the position coordinates. Specifically, the computer device acquires the position coordinates of the scanning location in the scanning object coordinate system, determines the pressure sensor located at the scanning location of the scanning object in combination with the position coordinates of each pressure sensor in the scanning object coordinate system determined in the step S201, and then determines the pressure sensor as the target pressure sensor.
S203, acquiring a pressure value of the target pressure sensor.
Specifically, based on the target pressure sensor determined in step S202, the computer device acquires the pressure value acquired by the target pressure sensor. Alternatively, the target pressure sensor may be one pressure sensor or a plurality of pressure sensors, which is not limited in this embodiment, depending on the actual pressure sensor preset rule and the size of the scanning site of the scanning object.
According to the SAR value determining method for magnetic resonance imaging, the position information of each pressure sensor is obtained, the target pressure sensor is determined according to the position information of each pressure sensor and the position information of the scanning position, the pressure value of the target pressure sensor is obtained and is equivalent to the determined pressure sensor corresponding to the scanning position, and then the pressure value of the pressure sensor corresponding to the scanning position is read, so that the pressure value of the pressure sensor corresponding to the scanning position can be obtained rapidly, the efficiency and the accuracy of the pressure value of the scanning position are improved greatly, and the accuracy of the weight of the scanning position is improved.
Fig. 4 is a flowchart of a method for determining SAR values of magnetic resonance imaging according to an embodiment, which relates to a specific process of determining a target pressure sensor by a computer device according to position information of each pressure sensor. On the basis of the embodiment shown in fig. 3, as shown in fig. 4, the step S202 includes:
s301, determining a pressure distribution diagram corresponding to the scanning object according to the position information of each pressure sensor.
Specifically, the computer device generates a position profile of each pressure sensor according to the position information of each pressure sensor obtained in the step S201, alternatively, the computer device may form a pressure profile by combining the position information of each pressure sensor and the pressure value collected by each pressure sensor, alternatively, the pressure profile may also be a pressure profile formed by combining the position information of each pressure sensor and the number of each pressure sensor. Because the pressure sensors collect the pressure generated when the scanning object lies on the bed board, the pressure distribution diagram of each pressure sensor can be determined to be the pressure distribution diagram corresponding to the scanning object.
S302, performing image segmentation processing on the pressure distribution map according to the body state characteristic information of the scanning object, and determining the human body part information corresponding to each pressure sensor.
In this embodiment, the body state characteristic information of the scan object may be a body state distribution map formed by manually measuring the length, width and circumference of each part of the body of the scan object in advance, or may be a body state distribution map of the scan object automatically generated by video full-image scanning (for example, a camera), which is not limited in this embodiment.
Specifically, taking a body state feature information of a scanned object as an example, the body state feature information of the scanned object is a body state distribution map automatically generated through video holophote scanning, the computer device overlaps the body state distribution map of the scanned object with the pressure distribution map obtained in the step S301, and performs image segmentation on the pressure distribution map by taking each part of the body as a unit, optionally, when the pressure distribution map is formed by pressure sensor position information and pressure values collected by the pressure distribution map, the computer device overlaps the body state distribution map of the scanned object with the pressure distribution map to obtain pressure sensor position information and corresponding pressure values corresponding to each part of the scanned object body, thereby determining body part information corresponding to each pressure sensor, optionally, when the pressure distribution map obtained in the step S301 is formed by pressure sensor position information and a number, the computer device overlaps the body state distribution map of the scanned object with the pressure distribution map to obtain position information and a number of the pressure sensor corresponding to each part of the scanned object body, thereby determining body part information corresponding to each pressure sensor.
The body part information corresponding to the pressure sensor may be position information of each body part corresponding to the pressure sensor in the scanned body state distribution diagram, a specific name of the body part corresponding to the pressure sensor in the scanned body state distribution diagram, a number of the body part corresponding to the pressure sensor in the scanned body state distribution diagram, or other information, which is not limited in this embodiment. Alternatively, the number may be an arabic number, or an english letter code, or a combination of an arabic number and an english letter code, which is not limited in this embodiment, so long as the human body part information corresponding to the pressure sensor may reflect a specific position of the human body part corresponding to the pressure sensor in the human body.
S303, determining the target pressure sensor according to instruction information input by a user and human body part information corresponding to each pressure sensor; the instruction information comprises human body part information corresponding to the scanning part.
In this embodiment, the instruction information may be the name of the scanning location, the position information of the scanning location in the human body, the code of the scanning location, or other information, which is not limited in this embodiment. Alternatively, the instruction may be input by the user through text input, through selecting a function key, through a specific gesture, or through other modes, for example, a mode of continuously sliding a region on a body profile, or through voice, where the mode of inputting the instruction by the user is not limited.
For example: taking a manner of inputting instructions by a user as an example by inputting characters, the user inputs a human body part name "heart" in a text box on a display screen of the computer device, determines a pressure sensor arranged in a region corresponding to the "heart" by combining the human body part information corresponding to each pressure sensor determined in the step S302, and determines the pressure sensor as a target pressure sensor.
According to the SAR value determining method of the magnetic resonance imaging, according to the position information of each pressure sensor, a pressure distribution diagram corresponding to a scanning object is determined, according to the body state characteristic information of the scanning object, image segmentation processing is carried out on the pressure distribution diagram, human body position information corresponding to each pressure sensor is determined, and then according to instruction information input by a user and the human body position information corresponding to each pressure sensor, the target pressure sensor is determined.
In order to accurately acquire the pressure value of the scanning portion of the scanning object, when there are at least two target pressure sensors corresponding to the scanning portion, the computer device may acquire the pressure value acquired by each target pressure sensor according to a flowchart of another SAR value determining method for magnetic resonance imaging as provided in fig. 5, which is specifically described as steps S401 and S402 below:
s401, acquiring pressure values acquired by each target pressure sensor.
Specifically, in combination with the plurality of target pressure sensors determined in step S202 described above, the computer device acquires the pressure value acquired by each target pressure sensor, respectively. Alternatively, the computer device may send a control command to each of the target pressure sensors, and receive a pressure value sent by each of the target pressure sensors according to the control command. For example, in practical application, when at least two or more corresponding target sensors exist at a scanning position of a scanning object, the computer device sends a control instruction to each target pressure sensor, based on the control instruction, the plurality of target pressure sensors send back pressure values collected on each pressure sensor to the computer device, and then the computer device receives the pressure values sent by each pressure sensor. Alternatively, the manner in which the computer device sends the control instruction may be by wired communication, or may be by wireless, for example, infrared, bluetooth, 2G, 3G, 4G, 5G, or other manners, which is not limited in this embodiment.
Optionally, the computer device may further determine, from the set of pressure values, a pressure value corresponding to the identifier of the target pressure sensor according to a correspondence between the identifier of the pressure sensor and the pressure value; the pressure value set comprises pressure values acquired by all pressure sensors corresponding to the scanning object.
In the embodiment of the present invention, each pressure sensor has an identifier, and the identifier may be encoded information or other information, which is not limited in this embodiment. Alternatively, the code may be an arabic number, or may be an english letter or other information, which is not limited in this embodiment.
Specifically, based on the corresponding target pressure sensor determined in step S303, when each pressure sensor detects pressure, the collected pressure value and its own code are reported to the computer device, and the computer device establishes a pressure value set according to the pressure value and the code reported by each pressure sensor. When at least more than two corresponding target sensors exist at the scanning part of the scanning object, the computer equipment determines the pressure values acquired by the target pressure sensors from the pressure values acquired by all the pressure sensors according to the corresponding relation between the identifiers of the pressure sensors and the pressure values displayed on the identifiers, and the pressure values measured by the target pressure sensors are the pressure values of each target pressure sensor acquired by the computer equipment.
And S402, summing all the pressure values acquired by the target pressure sensor to obtain the pressure value of the target pressure sensor.
Specifically, based on the pressure values of all the target pressure sensors obtained in the above steps, the computer device automatically sums all the pressure values to obtain a sum of the pressure values of all the target pressure sensors, and determines the sum of the pressure values as the pressure value of the target pressure sensor. Alternatively, the pressure value collected by each target pressure sensor can be checked, the pressure value with obvious errors is directly discarded or corrected, and the pressure values collected by the target pressure sensors after the checking are summed. For example, the average pressure value of the pressure values collected by all the target pressure sensors may be obtained first, the difference between the pressure value collected by each target pressure sensor and the average pressure value is determined, and if the difference is greater than a preset threshold, the pressure value collected by the target pressure sensor corresponding to the difference is discarded or corrected.
According to the SAR value determining method for the magnetic resonance imaging, the computer equipment sends a control instruction to each target pressure sensor and receives the pressure value sent by each target pressure sensor according to the control instruction. Or, the computer device may further determine, according to the identifier of the pressure sensor, the corresponding pressure value of the target pressure sensor from the pressure value sets acquired by all the pressure sensors according to the identifier of the pressure sensor, so as to quickly and accurately acquire the pressure value of the scanning part of the scanning object.
It should be understood that, although the steps in the flowcharts of fig. 2-5 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily occur sequentially, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or steps.
Fig. 6 is a schematic structural diagram of a magnetic resonance imaging apparatus according to an embodiment, as shown in fig. 6, the apparatus includes: a first acquisition module 10, a second acquisition module 11 and a determination module 12.
A first acquisition module 10 for acquiring pressure values of a scanning portion of a scanning object by a plurality of pressure sensors;
a second obtaining module 11, configured to obtain a mass of the scanning location according to the pressure value;
And the determining module 12 is used for determining the SAR value corresponding to the scanning position according to the quality of the scanning position.
The magnetic resonance imaging apparatus provided in this embodiment may perform the above method embodiments, and its implementation principle and technical effects are similar, and will not be described herein.
In one embodiment, fig. 7 is a schematic structural diagram of a magnetic resonance imaging apparatus according to another embodiment, as shown in fig. 7, the first acquisition module 10 includes: a first acquisition unit 101, a first determination unit 102, and a second acquisition unit 103.
A first acquiring unit 101 configured to acquire positional information of each of the pressure sensors;
a first determining unit 102 for determining a target pressure sensor based on the position information of each of the pressure sensors and the position information of the scanning location;
a second acquisition unit 103 for acquiring a pressure value of the target pressure sensor.
Optionally, with continued reference to fig. 7, the determining module 12 of the apparatus may further include: the calculating unit 121 is configured to determine the SAR value corresponding to the scanning location according to the quality, the magnetic field strength, and the radio frequency pulse signal strength of the scanning location.
The magnetic resonance imaging apparatus provided in this embodiment may perform the above method embodiments, and its implementation principle and technical effects are similar, and will not be described herein.
In one embodiment, fig. 8 is a schematic structural diagram of a magnetic resonance imaging apparatus according to another embodiment, as shown in fig. 8, the first determining unit 102 includes: the first determination subunit 1021, the second determination subunit 1022, and the third determination subunit 1023.
A first determining subunit 1021, configured to determine a pressure distribution map corresponding to the scan object according to the position information of each pressure sensor;
a second determining subunit 1022, configured to perform image segmentation processing on the pressure distribution map according to the body state feature information of the scan object, and determine the human body part information corresponding to each pressure sensor;
a third determining subunit 1023, configured to determine the target pressure sensor according to instruction information input by a user and human body part information corresponding to each pressure sensor; the instruction information comprises human body part information corresponding to the scanning part.
The magnetic resonance imaging apparatus provided in this embodiment may perform the above method embodiments, and its implementation principle and technical effects are similar, and will not be described herein.
In one embodiment, fig. 9 is a schematic structural diagram of a magnetic resonance imaging apparatus according to one embodiment, as shown in fig. 9, the second obtaining unit 103 includes: a third acquisition subunit 1031 and a processing subunit 1032.
Specifically, a third acquiring subunit 1031, configured to acquire a pressure value acquired by each of the target pressure sensors;
and the processing subunit 1032 is configured to sum all the pressure values acquired by the target pressure sensor, and obtain a pressure value of the target pressure sensor.
Optionally, the third acquiring subunit 1031 is specifically configured to send a control instruction to each of the target pressure sensors; and receiving a pressure value sent by each target pressure sensor according to the control instruction.
Optionally, the third obtaining subunit 1031 is specifically configured to determine, from a set of pressure values, a pressure value corresponding to the identifier of the target pressure sensor according to a correspondence between the identifier of the pressure sensor and the pressure value; the pressure value set comprises pressure values acquired by all pressure sensors corresponding to the scanning object.
The magnetic resonance imaging apparatus provided in this embodiment may perform the above method embodiments, and its implementation principle and technical effects are similar, and will not be described herein.
For specific limitations of the magnetic resonance imaging apparatus, reference may be made to the above description of the SAR value determination method for magnetic resonance imaging, which is not repeated here. The various modules in the magnetic resonance imaging apparatus described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and an internal structure diagram thereof may be as shown in fig. 10. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a SAR value determination method of magnetic resonance imaging. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 10 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a magnetic resonance imaging system is provided, the system comprising a magnetic resonance apparatus imaging apparatus and a computer apparatus comprising a memory and a processor, wherein the memory has stored therein a computer program which when executed by the processor performs the steps of:
acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
acquiring the mass of the scanning part according to the pressure value;
and determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
The magnetic resonance imaging system provided in the above embodiment has similar implementation principles and technical effects to those of the above method embodiment, and will not be described herein.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
Acquiring pressure values of a scanning part of a scanning object through a plurality of pressure sensors;
acquiring the mass of the scanning part according to the pressure value;
and determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
The computer readable storage medium provided in the above embodiment has similar principle and technical effects to those of the above method embodiment, and will not be described herein.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A method for determining specific absorption rate SAR values for magnetic resonance imaging, the method comprising:
generating a position distribution map of each pressure sensor according to the position coordinates of the plurality of pressure sensors in a scanning object coordinate system; each pressure sensor is distributed on the flexible layer on the upper surface of the bed plate according to the outline size of the scanning part of the scanning object;
Forming a pressure distribution map corresponding to the scanning object according to the position distribution map and the pressure values acquired by the pressure sensors;
acquiring the morphological characteristic information of the scanned object, and carrying out image segmentation processing on the pressure distribution map; determining at least one target pressure sensor corresponding to the scanning part of the scanning object according to instruction information input by a user and an image segmentation processing result; the instruction information comprises human body part information corresponding to the scanning part; the body state characteristic information of the scanned object is a body state distribution diagram obtained through video full image scanning; the instruction information is input by the user by continuously sliding a region on the body state distribution map;
checking the pressure value acquired by each target pressure sensor according to the average pressure value of the pressure values of the target pressure sensors;
determining a pressure value acquired by a target pressure sensor, wherein the difference value between the pressure value and the average pressure value is smaller than a preset threshold value, as the pressure value of the scanning part;
acquiring the mass of the scanning part according to the pressure value, the horizontal plane of the gravity center of the scanning part of the scanning object and the inclination angle of the upper surface of the bed plate;
And determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
2. The method according to claim 1, wherein determining at least one target pressure sensor corresponding to the scanning location of the scanning object according to the instruction information and the segmentation result input by the user comprises:
according to the body state characteristic information of the scanning object, carrying out image segmentation processing on the pressure distribution map, and determining the human body part information corresponding to each pressure sensor;
and determining each target pressure sensor according to the instruction information input by the user and the human body part information corresponding to each pressure sensor.
3. The method according to claim 1, wherein the method further comprises:
acquiring a pressure value acquired by each target pressure sensor;
and summing all the pressure values acquired by the target pressure sensors to obtain the pressure value of each target pressure sensor.
4. A method according to claim 3, wherein said obtaining pressure values collected by each of said target pressure sensors comprises:
sending control instructions to each target pressure sensor;
And receiving a pressure value sent by each target pressure sensor according to the control instruction.
5. The method of claim 4, wherein said obtaining pressure values collected by each of said target pressure sensors comprises:
determining a pressure value corresponding to the identification of the target pressure sensor from a pressure value set according to the corresponding relation between the identification of the pressure sensor and the pressure value; the pressure value set comprises pressure values acquired by all pressure sensors corresponding to the scanning object.
6. The method of claim 1, wherein determining the SAR value corresponding to the scan site based on the quality of the scan site comprises:
and determining the SAR value corresponding to the scanning position according to the quality of the scanning position, the magnetic field intensity and the radio frequency pulse signal intensity.
7. A magnetic resonance imaging apparatus, the apparatus comprising:
the first acquisition module is used for generating a position distribution diagram of each pressure sensor according to the position coordinates of the plurality of pressure sensors in the scanning object coordinate system; each pressure sensor is distributed on the flexible layer on the upper surface of the bed plate according to the outline size of the scanning part of the scanning object;
Forming a pressure distribution map corresponding to the scanning object according to the position distribution map and the pressure values acquired by the pressure sensors;
acquiring the morphological characteristic information of the scanned object, and carrying out image segmentation processing on the pressure distribution map; determining at least one target pressure sensor corresponding to the scanning part of the scanning object according to instruction information input by a user and an image segmentation processing result; the instruction information comprises human body part information corresponding to the scanning part; the body state characteristic information of the scanned object is a body state distribution diagram obtained through video full image scanning; the instruction information is input by the user by continuously sliding a region on the body state distribution map;
checking the pressure value acquired by each target pressure sensor according to the average pressure value of the pressure values of the target pressure sensors;
determining a pressure value acquired by a target pressure sensor, wherein the difference value between the pressure value and the average pressure value is smaller than a preset threshold value, as the pressure value of the scanning part;
the second acquisition module is used for acquiring the quality of the scanning part according to the pressure value, the horizontal plane of the gravity center of the scanning part of the scanning object and the inclination angle of the upper surface of the bed board;
And the determining module is used for determining SAR values corresponding to the scanning positions according to the quality of the scanning positions.
8. The magnetic resonance imaging apparatus of claim 7, wherein the determination module comprises: and the calculation unit is used for determining SAR values corresponding to the scanning positions according to the quality of the scanning positions, the magnetic field intensity and the radio frequency pulse signal intensity.
9. A magnetic resonance imaging system, comprising: a magnetic resonance apparatus imaging apparatus and a computer apparatus; the computer device comprising a memory storing a computer program and a processor implementing the steps of the method of any of claims 1 to 6 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810848135.1A CN109171724B (en) | 2018-07-27 | 2018-07-27 | SAR value determination method, device and system for magnetic resonance imaging and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810848135.1A CN109171724B (en) | 2018-07-27 | 2018-07-27 | SAR value determination method, device and system for magnetic resonance imaging and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109171724A CN109171724A (en) | 2019-01-11 |
| CN109171724B true CN109171724B (en) | 2023-05-30 |
Family
ID=64937798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810848135.1A Active CN109171724B (en) | 2018-07-27 | 2018-07-27 | SAR value determination method, device and system for magnetic resonance imaging and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109171724B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111027469B (en) * | 2019-12-09 | 2024-03-01 | 上海联影智能医疗科技有限公司 | Human body part recognition method, computer device, and readable storage medium |
| CN112107328B (en) * | 2020-09-23 | 2024-04-26 | 上海联影医疗科技股份有限公司 | Medical equipment scanning guiding method and system thereof |
| CN112826496A (en) * | 2020-12-31 | 2021-05-25 | 深圳市联影高端医疗装备创新研究院 | Scanning bed, SAR factor monitoring method, equipment, medium and magnetic resonance system |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5253656A (en) * | 1991-05-23 | 1993-10-19 | Rincoe Richard G | Apparatus and method for monitoring contact pressure between body parts and contact surfaces |
| EP1629773B8 (en) * | 2004-08-30 | 2012-06-20 | Kabushiki Kaisha Toshiba | Magnetic resonance diagnostic apparatus |
| EP2680744B1 (en) * | 2011-03-04 | 2021-05-05 | PatienTech LLC | Sensing system and method for patient supports |
| JP5689734B2 (en) * | 2011-04-20 | 2015-03-25 | 株式会社東芝 | X-ray CT system |
| KR20130021194A (en) * | 2011-08-22 | 2013-03-05 | 삼성전자주식회사 | Magnetic resonance imaging (mri) system and method for controlling the same |
| CN202489950U (en) * | 2011-12-28 | 2012-10-17 | 上海联影医疗科技有限公司 | Magnetic resonance system |
| CN103784139A (en) * | 2012-10-31 | 2014-05-14 | 西门子(深圳)磁共振有限公司 | Measuring device, hospital bed and magnetic resonance imaging system |
| CN104000588B (en) * | 2013-02-21 | 2017-08-25 | 上海联影医疗科技有限公司 | The method and system of patient is positioned in Medical Devices |
| US9005101B1 (en) * | 2014-01-04 | 2015-04-14 | Julian Van Erlach | Smart surface biological sensor and therapy administration |
| US9547063B2 (en) * | 2014-02-03 | 2017-01-17 | Toshiba Medical Systems Corporation | Calculating specific absorption rate (SAR) with magnetic resonance signals |
| CN105326514A (en) * | 2014-06-10 | 2016-02-17 | 上海西门子医疗器械有限公司 | X-ray apparatus |
| US20160091583A1 (en) * | 2014-09-30 | 2016-03-31 | Siemens Aktiengesellschaft | Patient-Specific Estimation of Specific Absorption Rate |
| CN107440718B (en) * | 2016-05-31 | 2020-09-29 | 上海联影医疗科技有限公司 | Magnetic resonance imaging SAR value determination method and magnetic resonance imaging device |
| US10492734B2 (en) * | 2016-11-04 | 2019-12-03 | Wellsense, Inc. | Patient visualization system |
| CN108113120B (en) * | 2017-12-20 | 2020-08-04 | 中国科学院合肥物质科学研究院 | Three-dimensional foot shape and plantar pressure integrated measuring instrument |
-
2018
- 2018-07-27 CN CN201810848135.1A patent/CN109171724B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109171724A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109171724B (en) | SAR value determination method, device and system for magnetic resonance imaging and storage medium | |
| CN110559077A (en) | Coordinate system registration method, robot control method, device, equipment and medium | |
| CN110570483B (en) | Scanning method, scanning device, computer equipment and storage medium | |
| CN109567852B (en) | Method for determining scanning range, method, device and equipment for acquiring medical image | |
| CN112635042B (en) | Monitor calibration method, device, equipment and storage medium | |
| US11051694B2 (en) | Systems and methods for tracking imaging attenuators | |
| US20180008223A1 (en) | Diagnosis support system, diagnosis support apparatus, and recording medium | |
| CN111462018B (en) | Image alignment method in image, computer equipment and storage medium | |
| CN113920114B (en) | Image processing method, image processing apparatus, computer device, storage medium, and program product | |
| Wright et al. | Intra-fraction motion gating during frameless Gamma Knife® Icon™ therapy: the relationship between cone beam CT assessed intracranial anatomy displacement and infrared-tracked nose marker displacement | |
| CN111583099A (en) | Image rectification method, computer device, and storage medium | |
| CN112450956A (en) | Automatic positioning method, device, readable storage medium, electronic equipment and system | |
| CN112150485B (en) | Image segmentation method, device, computer equipment and storage medium | |
| CN110742639B (en) | Scanning system configuration method, scanning system configuration device, computer equipment and readable storage medium | |
| CN109480886B (en) | Bone injury detection method and device, computer equipment and storage medium | |
| CN113520426B (en) | Coaxiality measuring method, medical equipment rack adjusting method, equipment and medium | |
| JP2009050373A (en) | Magnetic resonance imaging system and photographing program | |
| CN113384260B (en) | Acceleration factor adjusting method, magnetic resonance imaging scanning method, device and equipment | |
| CN113495240B (en) | Method and device for generating scanning scheme, computer equipment and storage medium | |
| CN113393500B (en) | Spine scanning parameter acquisition method, device, equipment and storage medium | |
| CN110561413B (en) | Coordinate system registration tool | |
| CN104853680A (en) | Spatial dimension determination device for determining a spatial dimension of a target element within an object | |
| JP2014050530A (en) | Magnetic resonance imaging apparatus and magnetic resonance imaging method | |
| CN112545485B (en) | Magnetic resonance scanning method, device, equipment and storage medium | |
| CN114693841A (en) | Image scanning method, image scanning device, computer equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201800 No. 2258 Chengbei Road, Jiading District, Shanghai Applicant after: Shanghai Lianying Medical Technology Co.,Ltd. Address before: 201800 No. 2258 Chengbei Road, Jiading District, Shanghai Applicant before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TG01 | Patent term adjustment | ||
| TG01 | Patent term adjustment |