Abstract: Systems and methods for MRI are provided. The methods may include for each slice of a plurality of slices of a subject to be scanned, determining a plurality of radiofrequency (RF) parameters, the plurality of RF parameters including at least one channel parameter corresponding to each of a plurality of channels; determining a slice group based at least in part on the RF parameters corresponding to the plurality of slices, the slice group including at least two slices selected from the plurality of slices; and directing at least a portion of the plurality of channels to excite the slice group based on RF parameters corresponding to the slice group.

Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.

Abstract: Systems and methods for MRI are provided. The methods may include for each slice of a plurality of slices of a subject to be scanned, determining a plurality of radiofrequency (RF) parameters, the plurality of RF parameters including at least one channel parameter corresponding to each of a plurality of channels; determining a slice group based at least in part on the RF parameters corresponding to the plurality of slices, the slice group including at least two slices selected from the plurality of slices; and directing at least a portion of the plurality of channels to excite the slice group based on RF parameters corresponding to the slice group.

Abstract: Systems and methods for medical imaging diagnoses are provided. The methods may include detecting an entrance of the scan platform into a scanning room by a signal emission device, moving the scan platform to a joint area according to connection interface of the medical imaging device by a driving device. The method may also include adjusting the scan platform to connect to the medical imaging device by a position adjusting device. The method may also include connecting the scan platform to the medical imaging device by a physical interface. The method may further include moving the scanning object to a scanning area of the medical imaging device by the driving device.

Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.

Abstract: A method for MRI may include obtaining one or more scan parameters. The one or more scan parameters may include information of a plurality of diffusion gradients. The method may include causing, based on the one or more scan parameters, an imaging device to perform a plurality of scans to one or more slices of an object by applying the plurality of diffusion gradients to the one or more slices. For two components in a specific direction of the plurality of diffusion gradients applied in any two successive scans of the plurality of scans, there may be at most one component exceeding a first threshold. The specific direction may be one of a readout direction, a phase-encoding direction, or a slice-selection direction. The first threshold may be less than diffusion gradient energy relating to a duration and strength associated with one of the plurality of diffusion gradients.

Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.

Abstract: The present invention discloses a mobile unit, an inventory management system, and a method for mobile unit localization. Sensors are immovably disposed in the workplace, actively identifying the positions of the mobile units. The individual sensor disposed in the workplace can monitor the positions of a plurality of mobile units simultaneously, and the number of sensors is only related to the size of workspace, which is independent of the number of mobile units. Since no complicated position calculations are needed for the mobile units, it reduces the requirements for on-board processors, which is more advantageous to monitor the preexisting non-automated vehicles or retrofit them into automated vehicles. With the method of the present invention, position calculations are not carried out on the bodies of AGVs, the requirements for the on-board controllers of AGVs are low, and it is easier to retrofit the non-intelligent mobile units, and thereby position monitoring and autonomous operation are implemented.

Abstract: A method for MRI may include obtaining one or more scan parameters. The one or more scan parameters may include information of a plurality of diffusion gradients. The method may include causing, based on the one or more scan parameters, an imaging device to perform a plurality of scans to one or more slices of an object by applying the plurality of diffusion gradients to the one or more slices. For two components in a specific direction of the plurality of diffusion gradients applied in any two successive scans of the plurality of scans, there may be at most one component exceeding a first threshold. The specific direction may be one of a readout direction, a phase-encoding direction, or a slice-selection direction. The first threshold may be less than diffusion gradient energy relating to a duration and strength associated with one of the plurality of diffusion gradients.

Abstract: A method for modifying RF pulse infidelity is provided. The method may include obtaining a designed time-domain waveform. The method may also include directing a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate an output RF pulse based on the designed time-domain waveform. The method may also include measuring an output time-domain waveform of the output RF pulse. The method may also include determining, based on the designed time-domain waveform and the output time-domain waveform, a modified time-domain waveform corresponding to an excitation RF pulse. The method may also include directing the MRI scanner to generate, using a waveform generator and the RFPA and based on the modified time-domain waveform, the excitation RF pulse to excite one or more slices of an object in an MRI scan.

Abstract: The present invention discloses an unmanned transporting robot and the chassis thereof, the chassis includes a floor, a drive unit and a follow unit; the follow unit is used to bear the loads of the chassis and the payload, and includes a plurality of follow components which are arranged on the floor to enable the floor to move smoothly (i. e. without the occurrence of tilting or vibration); the drive unit includes a first drive component and a second drive component which are located symmetrically on both ends of the floor. The present invention also discloses an unmanned transporting robot including the above-described chassis. The chassis of the unmanned transporting robot according to the present invention has the advantages of a compress structure, a small size and a high loading-bearing capacity.

Abstract: A self-charging device for mobile robots, which includes a charging cradle and a charging pin, the charging cradle includes a charging contact and a first elastic member connected with the charging contact. The charging pin is used to contact the charging contact for charging. Preferably, the charging cradle also includes a buffering block, a second elastic member and a mounting enclosure. The charging contact is connected with the buffering block through the first elastic member. The buffering block is provided encircling inside the mounting enclosure. One end of the second elastic member is connected with the buffering block, and the other end is connected with the mounting enclosure. The self-charging device for mobile robots is capable of counteracting the deviation angle due to the misalignment when the mobile robot is charging, and buffering the impact force produced when the charging contact docks with the charging pin.

Abstract: A method for modifying RF pulse infidelity is provided. The method may include obtaining a designed time-domain waveform. The method may also include directing a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate an output RF pulse based on the designed time-domain waveform. The method may also include measuring an output time-domain waveform of the output RF pulse. The method may also include determining, based on the designed time-domain waveform and the output time-domain waveform, a modified time-domain waveform corresponding to an excitation RF pulse. The method may also include directing the MRI scanner to generate, using a waveform generator and the RFPA and based on the modified time-domain waveform, the excitation RF pulse to excite one or more slices of an object in an MRI scan.

Abstract: The present invention discloses a mobile unit, an inventory management system, and a method for mobile unit localization. Sensors are immovably disposed in the workplace, actively identifying the positions of the mobile units. The individual sensor disposed in the workplace can monitor the positions of a plurality of mobile units simultaneously, and the number of sensors is only related to the size of workspace, which is independent of the number of mobile units. Since no complicated position calculations are needed for the mobile units, it reduces the requirements for on-board processors, which is more advantageous to monitor the preexisting non-automated vehicles or retrofit them into automated vehicles. With the method of the present invention, position calculations are not carried out on the bodies of AGVs, the requirements for the on-board controllers of AGVs are low, and it is easier to retrofit the non-intelligent mobile units, and thereby position monitoring and autonomous operation are implemented.

Abstract: A self-charging device for mobile robots, which includes a charging cradle and a charging pin, the charging cradle includes a charging contact and a first elastic member connected with the charging contact. The charging pin is used to contact the charging contact for charging. Preferably, the charging cradle also includes a buffering block, a second elastic member and a mounting enclosure. The charging contact is connected with the buffering block through the first elastic member. The buffering block is provided encircling inside the mounting enclosure. One end of the second elastic member is connected with the buffering block, and the other end is connected with the mounting enclosure. The self-charging device for mobile robots is capable of counteracting the deviation angle due to the misalignment when the mobile robot is charging, and buffering the impact force produced when the charging contact docks with the charging pin.

Abstract: A method for medical imaging may include determining a posture of an object and obtaining a first parameter of a pulse sequence to be applied to the object. The method may also include determining, based on the posture and the first parameter, a SAR distribution model and estimating, based on the SAR distribution model and a second parameter of the pulse sequence to be applied, a SAR distribution associated with the object under the pulse sequence to be applied. The second parameter is associated with calibration of the pulse sequence to be applied. The method may further include determining whether the estimated SAR distribution meets a condition and causing, in response to a result of the determination that the estimated SAR distribution associated with the object meets the condition, a scanner to perform an MR scan on the object according to the pulse sequence.

Abstract: Systems and methods for medical imaging diagnoses are provided. The methods may include detecting an entrance of the scan platform into a scanning room by a signal emission device, moving the scan platform to a joint area according to connection interface of the medical imaging device by a driving device. The method may also include adjusting the scan platform to connect to the medical imaging device by a position adjusting device. The method may also include connecting the scan platform to the medical imaging device by a physical interface. The method may further include moving the scanning object to a scanning area of the medical imaging device by the driving device.

Abstract: The present invention discloses an inventory item management system, transporting robots and the method for transporting inventory holder, wherein the transporting robot comprises a lifting unit and a horizontal rotation unit, the lifting unit comprises a first power unit, a lifting shaft and a first supporting part, and the first power unit configured to drive the first supporting part to move along the lifting shaft; the horizontal rotation unit comprises a second supporting part and a second power unit which drives the second supporting part, and the second supporting part and the first supporting part are connected rotatably. The lifting unit has a hollow hole which is disposed in vertical direction internal to the lifting unit, and the lifting shaft is located on one side of the hollow hole.

Abstract: The present invention provides an inventory item management system, a transporting device and the method for docking with the carried object. The method for the transporting device docking with the carried object includes the following steps: acquiring the docking instruction for docking with the carried object within a work space; acquiring the coordinate of the carried object within the work space; acquiring the real time coordinate of the transporting device within the work space; setting the optimized path for the transporting device traveling to the carried object; distributing at least one travel instruction according to the optimized path; driving the transporting device to travel to the position of the carried object according to the travel instruction; and docking with the carried object.

Abstract: The present invention discloses an unmanned transporting robot and the chassis thereof, the chassis includes a floor, a drive unit and a follow unit; the follow unit is used to bear the loads of the chassis and the payload, and includes a plurality of follow components which are arranged on the floor to enable the floor to move smoothly (i. e. without the occurrence of tilting or vibration); the drive unit includes a first drive component and a second drive component which are located symmetrically on both ends of the floor. The present invention also discloses an unmanned transporting robot including the above-described chassis. The chassis of the unmanned transporting robot according to the present invention has the advantages of a compress structure, a small size and a high loading-bearing capacity.