Abstract: Provided is an operation procedure of a positioning device of a radiation therapy system. The radiation therapy system includes a radiation generation device used to generate therapeutic radiation, an irradiation chamber used to accommodate an irradiation subject receiving the radiation, a management chamber used to achieve irradiation control, and a support device used to transport and support the irradiation subject. The support device includes a support member supporting the irradiation subject, an adjustment assembly for adjusting a spatial position of the support member, and a joining assembly fixedly connecting the support member and the adjustment assembly together in a detachable manner. The support member at least includes a first support member and a second support member having a different size and/or shape from the first support member. The invention allows switching between support members having different sizes and/or shapes according to an actual use requirement.

Abstract: Ultrasound attenuation coefficient estimation (“ACE”) techniques that can ameliorate frequency power ratio curve oscillations caused by signal interferences, non-uniform tissue structures, or both, are described. The resulting smoothed frequency power ratio curves enable more accurate ACE and reduced region-of-interest (“ROI”) sizes for linear regression.

Abstract: Disclosed is a control circuit for a relay in an uninterruptible power supply, comprising a plurality of capacitors comprising at least a first capacitor; and a plurality of relays comprising at least a first relay, a second relay, a third relay and a fourth relay, wherein a first terminal of the first relay is connected to a positive electrode of a battery, a second terminal of the first relay is connected to a first terminal of the first capacitor, a first terminal of the second relay is connected to a negative electrode of the battery, a second terminal of the second relay is connected to a second terminal of the first capacitor, a second terminal of the third relay is connected to the second terminal of the first relay, and a second terminal of the fourth relay is connected to the second terminal of the second relay.

Abstract: Ultrasound attenuation coefficient estimation (“ACE”) techniques that can ameliorate frequency power ratio curve oscillations caused by signal interferences, non-uniform tissue structures, or both, are described. The resulting smoothed frequency power ratio curves enable more accurate ACE and reduced region-of-interest (“ROI”) sizes for linear regression.

Abstract: Described here are systems and methods for improved ultrasound attenuation coefficient estimation (“ACE”) techniques. In one aspect, noise can be suppressed by using signal-to-noise ratio (“SNR”) as a quality control metric for restricting depth ranges for ACE. In this way, the proper depth range for each frequency component can be adaptively changed with sufficient SNR for ACE. In another aspect, elevation focusing normalization is used to reduce errors associated with diffraction effects when estimating attenuation coefficient. In another aspect, methods for suppressing noise in ACE techniques is provided. Noise can be suppressed based on a noise field computed from measurements obtained without ultrasound transmission, based on a unique combination of consecutive image frames, based on singular value decomposition (“SVD”) clutter filtering cutoff values, or combinations thereof.

Abstract: Disclosed herein is a battery case, which includes at least one resin-based composite material layer and at least one waterproof layer, where the resin-based composite material layer and the waterproof layer are bonded to each other by hot pressing. In addition, disclosed herein is a battery pack, which includes the battery case.

Abstract: A radiation irradiation system including a radiation generating device and a carrying table, a beam generated by the radiation generating device irradiates an irradiated object on the carrying table, the radiation irradiation system further includes a carrying table positioning device, the carrying table is supported by the carrying table positioning device, the carrying table positioning device includes a positioning mechanism, the positioning mechanism includes a linear axis, the carrying table positioning device may horizontally move along the linear axis, and an extending direction of the linear axis is parallel to an irradiation direction of beams generated by the radiation generating device. In the positioning process of the carrying table, most of the carrying table positioning device is located in the space between the linear axis and the beam outlet, the radioactivity and life-span shortening caused by the radiation of the various components of the carrying table positioning device are reduced.

Abstract: Systems and methods are provided to adaptively suppress reverberation clutter signals in ultrasound imaging. A robust principal component analysis (RPCA) may be used to separate a static or low dimension background signal from sparse, moving or high dimension objects in the presence of outliers. A tissue signal may be transformed to the wavelet domain to fulfill the sparsity conditions of RPCA. The use of the RPCA combined with wavelet kernels may be used to suppress reverberation clutter signals to achieve robust ultrasound attenuation coefficient estimation.

Abstract: The present invention belongs to the field of nanomedicine, and provides a DC biomimetic membrane nanoparticle loaded with an NIR-II AIE dye, a preparation method therefor and use thereof. The DC biomimetic membrane nanoparticle loaded with the NIR-II AIE dye comprises a DC membrane and an NIR-II AIE dye loaded therein, wherein the NIR-II AIE dye has photothermal characteristics. The DC biomimetic membrane nanoparticle loaded with the NIR-II AIE dye provided by the present invention not only solves the problem that the NIR-II AIE dye is poor in water solubility and limited in fluorescence imaging, but also increases the enrichment efficiency of the NIR-II AIE dye coated by the DC membrane at a tumor site and successfully activates the activity of T cells in vivo.

Abstract: An uninterruptible power supply, a control method and a power supply system for normally starting the uninterruptible power supply and securing switch devices are provided. The uninterruptible power supply includes a first rectification circuit, a charge-discharge circuit, a bus capacitor, a first switch circuit and a second rectification circuit. The first rectification circuit is connected to the charge-discharge circuit, and is configured to rectify a voltage outputted by the alternating current power supply. The charge-discharge circuit is connected to the bus capacitor, and is configured to charge the bus capacitor after boosting the voltage outputted by the first rectification circuit, until the voltage across the bus capacitor reaches a first voltage. The first switch circuit is connected to the second rectification circuit, and is configured to connect the alternating current power supply to the second rectification circuit.

Abstract: An excitation fuse device and a UPS battery circuit are provided including an excitation fuse and a voltage driving control module including a voltage detection circuit to detect a fuse device voltage and generate a voltage detection signal based on the fuse device voltage and a reference voltage, a fusing controller to receive voltage detection signal and generate a voltage control signal based on voltage detection signal and a fuse detection signal, and a fuse circuit to generate a fusing control signal based on the voltage control signal, which includes a current fuse to be fused based on a short-circuit current and a detonating breaker to be switched off based on the fusing control signal. The current fuse is connected to the fuse circuit through the detonating breaker, the fusing controller is connected to the voltage detection circuit, the fuse circuit and the excitation fuse.

Abstract: A calibration method, a calibration device and a calibration system of a laser positioning system are provided. The calibration method includes: arranging calibration devices in a first chamber and a second chamber, respectively, each calibration device including a calibration die, and the relative position between the calibration die of the first chamber and a predetermined center point of the first chamber being the same as the relative position between the calibration die of the second chamber and a predetermined center point of the second chamber; and comparing the position of a first positioning mark on the calibration die of the first chamber and the position of a second positioning mark on the calibration die of the second chamber. The technical solution provided can avoid deviation of an irradiation position to a patient from a correct treatment position, and reduce or avoid unnecessary radiation dose to the patient.

Abstract: A radiation exposure system includes a radiation generation device, a control device, a simulation positioning chamber, an irradiation chamber, as well as same first and second placement platforms that are respectively arranged in the simulation positioning chamber and the irradiation chamber, and same first and second placement platforms positioning devices that support the first and second placement platforms. An irradiated object has the same position on the first and second placement platforms. A simulated positioning position of the first placement platform is determined in the simulation positioning chamber by means of the first placement platform positioning device. The second placement platform positioning device is controlled by the irradiation indoor control device to move the second placement platform to the simulated positioning position and determine the irradiation position of the second placement platform.

Abstract: Systems and methods for estimating acoustic properties in a region-of-interest in a subject or other object being imaged using a reference frequency method (“RFM”) is described. Using this RFM technique, ultrasound data acquired at a given frequency are normalized by ultrasound data acquired at different frequencies (e.g., adjacent frequencies or otherwise) in order to provide estimations of the acoustic properties (e.g., attenuation coefficient, a backscatter coefficient, or both) that are independent of the ultrasound system used to acquire the underlying data. For instance, the amplitude of each frequency component can be normalized by a different frequency in the power spectrum to cancel out the system-dependent effects. Because the methods described in the present disclosure are system independent, they can be applied to any transducer geometry (e.g., linear or curved arrays) and using any beam pattern (e.g., focused or unfocused).

Abstract: Disclosed is a gel material having a high water content and excellent mechanical properties. The gel material includes repeating units derived from the following monomers (A) and (B): (A) an anionic monomer containing a polymerizable carbon-carbon multiple bond and an aromatic ring, and (B) a cationic monomer containing a polymerizable carbon-carbon multiple bond and an aromatic ring. The gel material has a water content of 20% by mass to 95% by mass, a tensile elastic modulus of 9 MPa to 1000 MPa, and a tensile elongation at break of 50% to 5000%.

Abstract: Disclosed is a control circuit for a relay in an uninterruptible power supply, comprising a plurality of capacitors comprising at least a first capacitor; and a plurality of relays comprising at least a first relay, a second relay, a third relay and a fourth relay, wherein a first terminal of the first relay is connected to a positive electrode of a battery, a second terminal of the first relay is connected to a first terminal of the first capacitor, a first terminal of the second relay is connected to a negative electrode of the battery, a second terminal of the second relay is connected to a second terminal of the first capacitor, a second terminal of the third relay is connected to the second terminal of the first relay, and a second terminal of the fourth relay is connected to the second terminal of the second relay.

Abstract: A housing includes: a housing body, having a cavity therein, with a first through hole in an outer wall thereof. The first through hole is in communication with the cavity, a first separate plate and a second separate plate are provided in the cavity, a gap between the first separate plate and an inner wall at one side of the cavity is in communication with the first through hole. A first recess for placing a water absorption device is provided between the first separate plate and the second separate plate, a bottom of a second recess between the second separate plate and the inner wall at another side of the cavity is in communication with the first through hole. A partial bottom of second recess close to first through hole is at a lower position than another partial bottom of second recess away from first through hole.

Abstract: A neutron capture therapy system, which can reduce secondary radiation and radiation damage caused by the action of recoil neutrons generated in the process of generating neutron beams by a beam transmission portion and a neutron beam generation portion. The neutron capture therapy system comprises an accelerator, the beam transmission portion, and the neutron beam generation portion; the accelerator accelerates charged particles to generate charged particle beams; the beam transmission portion transmits the charged particle beams generated by the accelerator to the neutron beam generation portion; the neutron beam generation portion generates neutron beams for treatment; and the neutron capture therapy system comprises a beam transmission shielding component for the beam transmission portion.

Abstract: Provided is a resin film that has a stress integral value of greater than 10 MPa and 1000 MPa or less when uniaxially stretched at a tensile speed of 300 mm/min at 25° C. until it breaks. The resin film showing these properties is supple and durable.

Abstract: The present invention relates to microfluidic or millifluidic chips (1) comprising at least one pressure sensing unit (4) able to measure a fluid flow pressure. The present invention also relates to a method for a direct and contact-free measuring of a local pressure of a fluid circulating in a microfluidic circuit, using a microfluidic or millifluidic chips (1) according to the invention.