Abstract: Provided is a tumor tracking method including: acquiring a detection image when a first ray source is located at a first detection point; determining, from a first reference image sequence in a preset image library, a first reference image corresponding to the detection image; acquiring, from a second reference image sequence corresponding to the first reference image sequence in the preset image library, a second reference image determined at the same time point as the first reference image; and determining a position of a tumor relative to a second ray source according to the second reference image.

Abstract: A method for image registration, a radiotherapy device, and a computer-readable storage medium are provided. The method includes identifying a to-be-registered area in a first image and a second image respectively, generating a first to-be-registered image that only includes the to-be-registered area and a second to-be-registered image that only includes the to-be-registered area, and then registering the first to-be-registered image and the second to-be-registered image. Since the first to-be-registered image only includes the to-be-registered area, and the second to-be-registered image only includes the to-be-registered area, registration based on the first to-be-registered image and the second to-be-registered image can avoid interferences with the to-be-registered area by other areas in the first image and the second image during registration directly based on the first image and the second image, thereby improving the registration precision.

Abstract: Disclosed is a method for detecting installation of a collimator of radiotherapy equipment. The method includes: acquiring a projection to be detected of a beam passing through the collimator and an isocentric plane of the radiotherapy equipment in sequence on a ray detector; comparing the projection to be inspected with a reference projection, and determining an installation deviation of the collimator of the radiotherapy equipment based on a deviation between the projection to be detected and the reference projection.

Abstract: Provided is a method for acquiring labeled data, including acquiring a 3D-3D registration sample, wherein the 3D-3D registration sample includes a sample 3D image, a reference 3D image and 3D-3D registration data, and the 3D-3D registration data includes correspondence data between the sample 3D image and the reference 3D image; generating at least one dual-2D-image based on the sample 3D image, wherein each dual-2D-image is a combination of 2D projection images of the sample 3D image in two different directions; and generating 2D-3D registration data corresponding to each dual-2D-image based on the 3D-3D registration data, wherein each 2D-3D registration data includes correspondence data between the dual-2D-image and the reference 3D image.

Abstract: Provided is a method for checking consistency between a radiotherapy equipment isocenter and a treatment isocenter, wherein the method includes: acquiring projection data from a detector and generating image data based on the projection data, wherein the image data includes a light spot and a shading located in the light spot, and the light spot and the shading are formed by a radiation beam generated by a treatment head of the radiotherapy equipment and then being blocked by a radiation blocking body; and determining an offset between the radiotherapy equipment isocenter and the treatment isocenter based on the image data. A system and a device for checking consistency between a radiotherapy equipment isocenter and a treatment isocenter are also provided.

Abstract: Automated property value calculation is provided. The method comprises receiving historic transaction data for a group of real estate properties over a specified time and receiving characteristic data regarding the properties for a number of defined categories. Historic data is also received for a number of demographic parameters over the specified time. The demographic data corresponds to regions in which the properties are located. A predictive valuation model is built with the financial transaction data, characteristic data, and demographic data. Individual values are calculated with the predictive valuation model for a new group of real estate properties according to their characteristics. The individual values are then aggregated. Financial transaction data is received for the new group of properties, and a net asset value of the new group of properties is calculated according to the aggregated valuations and financial transaction data.

Abstract: Provided is a method for radially mining open-pit end slope pressed coal, including: L-shaped or U-shaped main tunnel arrangements, and radially mining; branch tunnels are formed by excavating tunnels in directions perpendicular to or obliquely crossing the main tunnel from the L-shaped or U-shaped main tunnel; In the mining method, a coal mining system and a transportation system both adopt a remote control mode, a tunneling machine excavates a tunnel to product coal; a rubber belt conveyor conveys coal; the main tunnel adopts an exhaust ventilation mode, the branch tunnels adopt a blowing ventilation mode; the lengths of the branch tunnels do not exceed a farthest control distance of a remote control system; the length of each main tunnel needs to ensure that all the end slope pressed coal is mined under the premise that the branch tunnels do not exceed the farthest control distance of the remote control system.

Abstract: Embodiments of the present disclosure provide an X-ray collimator assembly and an X-ray source assembly. The X-ray collimator assembly includes a light limiter, a light filter, and a housing, the light limiter and the light filter are arranged in the housing, the housing includes an X-ray incident end and an X-ray emitting end; the light limiter is arranged between the X-ray incident end and the X-ray emitting end of the housing; and the light filter is arranged between the X-ray incident end and the light limiter, or the light filter is arranged between the X-ray emitting end and the light limiter. The X-ray collimator assembly provided by the embodiments of the present disclosure can effectively reduce noise interferences with the human tissue image obtained by X-ray projection, such that the projection image is more accurate.

Abstract: An image-guided method and radio therapy device are provided. The method includes: acquiring a rotation offset, a planned image and a real-time image of a target object; and determining a tracking offset based on the rotation offset, the planned image and the real-time image, the tracking offset being used for tracking the target object; where the rotation offset is generated by a position difference of the target object in a planning stage and a treatment stage. The planned image of the target object is acquired in the planning stage. The tracking offset is determined based on the rotation offset, the planned image and the real-time image. The tracking of the target object based on the tracking offset compensates for image distortion caused by the deflection of the position of the target object in the planning stage and the treatment stage.

Abstract: Provided are a method for tracking tumor location and a radiotherapy apparatus, relating to the field of medical equipment technology. The method is applied to a radiotherapy apparatus comprising a first detector and at least one radiation source, and comprises emitting, from the radiation source, ray beams having a predetermined intensity, the ray beams being partially scattered after passing through a body lesion; receiving, by the first detector, a portion of scattered ray beams to acquire scattering data of the lesion; determining a relative location relationship between the lesion and a target region according to the acquired scattering data; and adjusting at least one of the ray beam intensity, lesion location and target region location according to the determined relative location relationship, such that the lesion receives irradiation of the ray beams having an adjusted predetermined intensity at the target region location.

Abstract: The present invention discloses a method and system for selecting an image region that facilitates blur kernel estimation, in which the method includes: calculating a relative total variation value of each pixel in a blurred image to obtain a relative total variation mapping image; setting a threshold value to determine whether respective pixel in the image is a boundary pixel or not; then sampling the blurred image and its relative total variation mapping image to obtain a series of image patches; and finally counting the number of boundary pixels in each mapping image patch and selecting out an image region that facilitates blur kernel estimation. According to the method and the system, the problems of excessive dependency on operator experience, low efficiency and the like in the existing region selection methods are effectively solved. The image region that facilitates blur kernel estimation is automatically selected out.

Abstract: Certain embodiments provide RNA nanostructure (e.g., comprising one single-stranded RNA (ssRNA) molecule, wherein the RNA nanostructure comprises at least one paranemic cohesion crossover), as well as compositions and methods of use thereof. In certain embodiments, such RNA nanostructures are immuno-modulatory (e.g., immuno-stimulatory).

Abstract: Provided is a low-dose imaging method, including continuously acquiring projection data; generating a first image by processing the acquired projection data before a data volume of the acquired projection data reaches a preset volume, and displaying the first image; and generating a second image by processing the preset volume of projection data when the data volume of the acquired projection data reaches the preset volume, and displaying the second image.

Abstract: In some embodiments, complex molecular knots with high crossing numbers are achieved by folding, following a prescribed folding order, single-stranded DNA or RNA of customized sequences into target shapes. Such complex molecular knots with high crossing numbers are useful for biomedical applications including use as immunostimulatory agents and/or protein hosts and carriers.

Abstract: The present invention discloses a method and system for selecting an image region that facilitates blur kernel estimation, in which the method includes: calculating a relative total variation value of each pixel in a blurred image to obtain a relative total variation mapping image; setting a threshold value to determine whether respective pixel in the image is a boundary pixel or not; then sampling the blurred image and its relative total variation mapping image to obtain a series of image patches; and finally counting the number of boundary pixels in each mapping image patch and selecting out an image region that facilitates blur kernel estimation. According to the method and the system, the problems of excessive dependency on operator experience, low efficiency and the like in the existing region selection methods are effectively solved. The image region that facilitates blur kernel estimation is automatically selected out.

Abstract: The present disclosure provides a peeling device and method for film material. The film material includes a first film layer, a second film layer, and a third film layer stacked in sequence, and the first film layer and the second film layer have bodies corresponding to the third film layer and protrusions. The peeling device is configured to peel off the first film layer and includes: an abutment divided into a first area configured to place the bodies of the first film layer and the second film layer and the third film layer, and a second area configured to place the protrusions of the first film layer and the second film layer; and a peeling mechanism configured to be coupled to the protrusion of the first film layer to separate the first film layer from the second film layer.

Abstract: A multilevel deep well cooling and geothermal utilization system and process. The system has a deep well heat harnessing system, a shallow part heat-exchanging system, and a high-temperature water lifting system. The deep well heat harnessing system has a heat absorbing pipe, a thermally-conductive fluid lifting pipe, a thermally-conductive fluid lowering pipe, temperature sensors, and a water pump. The shallow part heat-exchanging system has a heat-dissipating pipe, a heat-storing water pool, a water intake pump, a water intake valve, a temperature sensor and a liquid level meter. The high-temperature water lifting system has a water discharging pump, a flowmeter, a water discharging valve, and a high-temperature water lifting pipe.

Abstract: A tumor positioning method includes obtaining projection images of a tumor at different angles; and registering the projection images with an initial reference image to obtain a first offset. If it is determined that a virtual reacquisition operation needs to be performed according to the first offset, the method further includes generating a first reference image according to the first offset; and registering the projection images with the first reference image to obtain a second offset. If it is determined that the operation does not need to be performed according to the second offset, the method further includes outputting a first accumulated offset being a sum of the first and second offsets. The method may solve problems of long time consuming and the service life of a treatment couch and acquisition devices being reduced due to repeatedly moving the treatment couch and repeatedly acquiring the X-ray projection images.

Abstract: A radiotherapy apparatus includes a rotating gantry rotatable about a central axis and a multi-energy imaging device. The multi-energy imaging device includes an imaging source and an imager. The imaging source is configured to generate X-rays of at least two energy levels and emit X-rays of at least one energy level in the X-rays of at least two energy levels, so that the X-rays of at least one energy level pass through a site to be treated of a patient. The X-ray of at least one energy level is configured to meet imaging requirements of the site to be treated. The imager is configured to receive the X-rays of at least one energy level that pass through the site to be treated, and to generate X-ray images of at least one energy level of the site to be treated according to the X-rays of at least one energy level. The imaging source and the imager are arranged opposite to each other on the rotating gantry.

Abstract: Embodiments of the present disclosure provide a method and an apparatus of locating a tumor. The method includes: obtaining a position of a positioning mark before the patient's head moves, a position of a positioning mark after the patient's head moves, and a position of the tumor before the patient's head moves, wherein the positioning mark is disposed at a preset position of the body surface of the patient's head; determining a position of the tumor after the patient's head moves according to the position of the positioning mark before the patient's head moves, the position of the positioning mark after the patient's head moves, and the position of the tumor before the patient's head moves.