Abstract: A wireless medical device, a central monitoring station, and a wireless medical monitoring system and method are disclosed. The system has a wireless medical device, a wireless access point, a wireless control unit and a central monitoring station, wherein the wireless medical device and the central monitoring station access a wireless network through the wireless access point and communicate with each other through the wireless network. The wireless medical device collects and processes at least one physiological parameter signal of a patient to obtain physiological data of the patient, and can also monitor network state information of the wireless access point to obtain first network state information; the wireless medical device sends the physiological data and the first network state information to the central monitoring station through the wireless network; and the central monitoring station at least displays the physiological data and stores the first network state information.

Abstract: Embodiments of the present application provide a computed tomography imaging method and apparatus. The method includes pre-scanning an examined site by using an incomplete detector at a pitch factor of greater than 3 to obtain first data, axially scanning the examined site using the incomplete detector to obtain second data, stitching the first data and the second data to obtain third data; compensating the third data to obtain compensated third data, and performing image reconstruction by using the compensated third data to obtain a scanned image. Therefore, by performing two scans using an incomplete detector, stitching and compensating data obtained by the two scans, while reducing the total dose of X-rays, the integrity of the obtained data is ensured, and the image quality of the final obtained scanned image is maintained.

Abstract: Embodiments of the present application provide a medical image processing method and apparatus and a medical device, the medical image processing apparatus including an acquisition unit, configured to acquire raw local projection data obtained by a detector after an object to be examined is scanned, a processing unit, configured to recover the raw local projection data to estimate first global data, a determination unit, configured to determine second global data according to the raw local projection data and the first global data, and a reconstruction unit, configured to reconstruct the second global data to obtain a diagnostic image.

Abstract: The present application provides an imaging method and system, and a non-transitory computer-readable storage medium. The imaging method comprises preprocessing projection data to obtain a predicted image of a truncated portion; performing forward projection on the predicted image to obtain predicted projection data of the truncated portion; and performing image reconstruction using the projection data obtained by forward projection and projection data of an untruncated portion.

Abstract: An acceleration sensor with differential graphene resonant beams includes a substrate, a sensitive mass plate, a first insulating layer, a second insulating layer, a first excitation electrode pair, a first graphene resonant beam, a second graphene resonant beam, a third insulating layer, a second excitation electrode pair, and a vacuum cover. An indirect acceleration-sensitive mode is adopted, so that the sensitive mass block directly senses acceleration to be measured, and converts the acceleration to be measured into a concentrated force to cause axial displacement of the sensitive mass block and then to cause a change in the axial stress of the graphene resonate beams, thereby causing a change in the resonant frequency of the beams.

Abstract: An apparatus for guiding a maintenance individual to perform a safety checking operation on a functional component of an elevator system includes: a wireless signal component connected with the elevator controller of the elevator system and establishing a wireless communication connection with the mobile terminal carried by the maintenance individual to enter the elevator hoistway for maintenance operation by broadcasting wireless signal; the apparatus configured to perform information interaction about the functional component by a wireless communication module of the mobile terminal and the elevator controller, and to provide safety checking guidance information for guiding the maintenance individual to complete the safety checking operation by a safety checking guidance module of the mobile terminal.

Abstract: An acceleration sensor with differential graphene resonant beams comprises a substrate (1), a sensitive mass plate (2), a first insulating layer (3), a second insulating layer (4), a first excitation electrode pair (1), a first graphene resonant beam (6), a second graphene resonant beam (7), a third insulating layer (8), a second excitation electrode pair (9), and a vacuum cover (10). An indirect acceleration-sensitive mode is adopted, so that the sensitive mass block directly senses acceleration to be measured, and converts the acceleration to be measured into a concentrated force to cause axial displacement of the sensitive mass block and then to cause a change in the axial stress of the graphene resonate beams, thereby causing a change in the resonant frequency of the beams. By measuring the resonant frequency of the beams, acceleration can be measured.

Abstract: Embodiments of the present invention provide a method for processing a radiotherapy CT positioning image, comprising: defining a pixel having a CT value greater than or equal to a first threshold in an original CT image as a human body pixel; counting a number of human body pixels of each pixel row in the original CT image in an order from top to bottom; and determining a boundary of the human body according to the counting result.

Abstract: The present application provides an imaging method and system, and a non-transitory computer-readable storage medium. The imaging method comprises preprocessing projection data to obtain a predicted image of a truncated portion; performing forward projection on the predicted image to obtain predicted projection data of the truncated portion; and performing image reconstruction using the projection data obtained by forward projection and projection data of an untruncated portion.

Abstract: Embodiments of the present invention provide a method for processing a radiotherapy CT positioning image, comprising: defining a pixel having a CT value greater than or equal to a first threshold in an original CT image as a human body pixel; counting a number of human body pixels of each pixel row in the original CT image in an order from top to bottom; and determining a boundary of the human body according to the counting result.