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.

Abstract: A robot arm including a first joint, a second joint, and a coupling element is provided. The first joint has a first inclined surface. The second joint is jointed to the first joint and has a second inclined surface. The coupling element has a third inclined surface and a fourth inclined surface opposite to the third inclined surface, wherein the third inclined surface contacts the first inclined surface, and the fourth inclined surface contacts the second inclined surface.

Abstract: Embodiments of the present disclosure provide a monitoring system for a radiotherapy center. The system includes at least one radiotherapy center and a monitoring cloud platform. The monitoring cloud platform is connected to the at least one radiotherapy center, and is configured to obtain operating parameters of at least one target device in the at least one radiotherapy center in real time. The monitoring cloud platform is further configured to control the at least one target device according to the operating parameters of the at least one target device in the at least one radiotherapy center.

Abstract: Disclosed herein are methods of treating acute kidney injury. The A method can include administering a sufficient amount of a DNA origami nanostructure to a subject afflicted with AKI to increase an excretory function of said subject. In some examples, the DNA origami nanostructure includes a scaffold strand and a plurality of staple strands, in which the scaffold strand comprises a M1 3 viral genome having a length of 7249 base pairs; and each staple strand of the plurality of staple strands has a length of about 20 to 60 base pairs.

Abstract: A method for determining a CT system parameter: controlling a mould body to move between an X-ray source and a detection surface of a detector, and acquiring X-ray projections of the mould body during movement on the detection surface, wherein the mould body has a first plane and a second plane perpendicular to each other, and the first plane and the second plane are always perpendicular to the detection surface during the movement of the mould body; determining a first straight line and a second straight line according to the acquired X-ray projections; and determining an intersection point of the first straight line and the second straight line as a pedal coordinate of a focus of the X-ray source on the detection surface, a CT coordinate system parameter including the coordinates of the foot of the perpendicular.

Abstract: Novel compositions and methods for engineering wireframe architectures and scaffolds of increasing complexity by creating gridiron-like DNA structures (FIG. 1). A series of four-arm junctions are used as vertices within a network of double-helical DNA fragments. Deliberate distortion of the junctions from their most relaxed conformations ensures that a scaffold strand can traverse through individual vertices in multiple directions. DNA gridirons, ranging from two-dimensional arrays with reconfigurability to multilayer and three-dimensional structures and curved objects, can be assembled according the methods presented herein.

Abstract: The present disclosure discloses a bowtie filter, a radiation scanning apparatus, and a radiation scanning method, and is used for improving the versatility of the bowtie filter, simplifying the operation of radiation scanning, and improving the efficiency of radiation scanning. The bowtie filter includes a filter body having at least two filter regions. Each of the at least two filter regions is in contact with or partially coincident with an adjacent filter region, and every two adjacent filter regions have different radiation compensation amounts. The radiation scanning apparatus includes a radiation source and the bowtie filter. The bowtie filter is disposed at a light outlet side of the radiation source, and each filter region of the bowtie filter corresponds to a different irradiation field of the radiation source.

Abstract: Provided is a setup method which can include: acquiring a position of a reference mark point provided on a noninvasive positioning device in an infrared coordinate system of an infrared positioning system; according to the position of the reference mark point in the infrared coordinate system, a relative position between the reference mark point and an image center point in an electronic scanning image, and a position of an isocenter of a radiotherapy equipment in a patient supporting device PSD coordinate system of the radiotherapy equipment, determining a first offset between the image center point and the isocenter in the PSD coordinate system; and adjusting the first offset to a first target offset by adjusting a position of a patient supporting device in the PSD coordinate system.

Abstract: Embodiments of this application provide a communication method and a related device. The method is applied to a base station. The base station includes a plurality of antenna arrays and a baseband processing unit. The plurality of antenna arrays are distributed around a communication area and are all connected to the baseband processing unit. A terminal in the communication area is configured to perform signal transmission with the antenna arrays, to implement communication with the baseband processing unit.

Abstract: An image guiding device can include a gantry, an imaging source, an imager, and an image server. The imaging source, the imager and the image server are all mounted on the gantry. The imager is connected to the image server. The imaging source is arranged to face the imager. The imaging source emits X-ray. The imager receives X-ray passing through an affected part of a patient, generates projection data based on the received X-ray, and sends the projection data to the image server. The image server processes the projection data to obtain an image of the affected part.

Abstract: In certain embodiments, this disclosure provides methods to generate DNA. RNA and/or DNA-peptide nanostructures based chimeric antigen receptor (CAR) T cell (engineered T cell) for cancer immunotherapy, and compositions made by these methods.

Abstract: Embodiments of the present disclosure provide a method and an apparatus of correcting a collimator, which may correct a position of a collimator of a gamma knife apparatus. The method includes: separately obtaining a projection image of rays sequentially passing through collimation holes and an isocenter plane in the collimator in cases where the collimator moves to M positions; determining a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays; recording position parameters corresponding to the target position, so as to control the collimator to move to the target position in a case where the a gamma knife apparatus is used for treatment.

Abstract: Described herein are immuno-stimulatory RNA nanostructures (which comprises a single-stranded RNA (ssRNA) molecule, wherein the ssRNA molecule forms at least one paranemic cohesion crossover), as well as compositions and methods of use thereof.

Abstract: A method and apparatus for position detection, and a radiotherapy system are provided. The radiotherapy system includes: a treatment couch, a positioning apparatus, an optical tracking system and a computer; the positioning apparatus disposed on the treatment couch, and at least one reference point provided on the positioning apparatus; the optical tracking system disposed above the treatment couch and configured to detect relative positioning between a mark point set on a treated part of a patient and the reference point, determine deviation between the relative and reference positions, and send the deviation to the computer. The computer is configured to determine whether to adjust a position of the treatment couch based on the deviation and deviation range. The system provided by the present disclosure avoids the influence of patient movement on the accuracy of treatment, and prevents a treatment beam from damaging normal tissues of the patient.

Abstract: The present disclosure relates to systems and methods for heat transfer and cooling in PET. The system may include a gantry including a gantry forming a detection tunnel; a detector mounted to the gantry, and positioned in a circumference of the detection tunnel; a heat transfer device thermally coupled with the detector and configured to transfer heat generated by the detector; and a cooling device thermally coupled to the heat transfer device, and configured to cool the heat transfer device.