30results about How to "Improve imaging" patented technology

The invention discloses a silicon-based micro-cavity narrow-band near-infrared photoelectric detector. In the structure of the detector, a monocrystalline silicon substrate is used as a base; whereinthe upper surface of the monocrystalline silicon substrate is etched into a silicon micropore array structure; an upper insulating layer is arranged on the silicon micropore array; a graphene film istransferred on the lower surface of the monocrystalline silicon substrate to form a graphene-silicon Schottky heterojunction; a lower insulating layer and a metal reflecting layer are sequentially arranged on the lower surface of the graphene film. The detector prepared by the invention realizes visible light blind narrowband near-infrared response, has the advantages of high response speed, easyintegration and the like, and also has the advantages of simple preparation method, low cost, high stability, strong compatibility and the like.

The invention discloses an automatic constant-speed push rod propelling device. The automatic constant-speed push rod propelling device comprises a tripod base device, a base device, a bubble leveling device, a motor gear transmission device, a roller clamping and propelling device, a depth encoder, an LED display device and the like, wherein the bubble leveling device, the motor gear transmission device, the roller clamping and propelling device, the depth encoder and the LED display device are fixed on the base, the base device is clamped with the tripod base device. During working, a push rod is inserted between two roller grooves and is tensioned by the tensioning device; a detachable rechargeable battery supplies power, a motor runs at a constant speed to drive the push rod to rise at a constant speed, the motor has overload protection, and if the push rod is clamped, power can be automatically cut off, and rod feeding is stopped; the depth encoder rotates through a roller and outputs a pulse signal, on one hand, the pushing depth of the push rod is directly displayed through a LED display screen, and on the other hand, the depth encoder can be connected to a peeping instrument host through a data cable to cooperatively complete video acquisition, image splicing and other work; and a switch button ensures that equipment is stopped and started at any time, and drill rod connection is facilitated. The equipment has the functions of clamping and fixing the push rod, automatically pushing the push rod at a constant speed, displaying the pushing depth, outputting a depth signal and the like, and can be well matched with and assist other equipment to finish drilling, peeping and the like.

The invention discloses a binary X-ray energy selective device, and relates to the field of X-ray energy selection. The binary X-ray energy selective device is formed by regularly piling up optical units which show binary distribution on transmission of X-rays, and particularly comprises columnar X-ray reflection elements and columnar X-ray absorbing elements. The X-ray reflection elements are ofa hollow structure, the inner walls of the X-ray reflection elements are plated with reflection layers, low-energy X-rays can be transmitted in the X-ray reflection elements and reflected by the innerwall of a channel, and thus an energy selection effect with low pass and high resistance is achieved. The X-ray absorption elements are of a solid structure and are doped with X-ray absorbents and can absorb high-energy X-rays to improve the energy selection efficiency and signal-to-noise ratios for imaging and detection. According to a preparing method of the binary X-ray energy selective device, reflection element monofilaments and absorption element monofilaments are piled up and combined in a sleeve to obtain a multifilament rod; the multifilament rod is subjected to thermal stretching, cutting, thermal fusion, corrosion, metal deposition and the like, and thus the binary X-ray energy selective device is obtained. The binary X-ray energy selective device is easy and convenient to operate, the requirement for equipment is low, the controllability of the preparing process is high, and the precision is high.

The invention relates to the field of nanoscale biomedical materials, in particular to a nanometer material as well as a preparation method and application thereof. The nanometer material comprises BSA: RE1, an RE2 inner core, a PDA shell layer covering the surfaces of the BSA: RE1 and the RE2 inner core, and FA on the surface of PDA, where RE1 and RE2 are different. The nanometer material has good dispersibility, is easy to prepare, has excellent biocompatibility and safety, can accurately perform multimodal MRI/CT imaging on tumors, and has a good photothermal treatment effect on the tumors.

The invention relates to the technical field of preparation of nano biomedical materials, and particularly relates to a novel NIR-II diagnosis and treatment integrated silicon-carbon nanoprobe and a preparation method thereof. According to the nanoprobe, a surfactant and white carbon black are used as a template agent and a silicon source, a Beta molecular sieve which is uniform in dispersion anduniform in particle size is synthesized, the Beta molecular sieve is used as a template to load ionic liquid, and the nanoprobe with NIR-II fluorescence/ NIR-II photoacoustic dual-mode imaging and NIR-II photothermal therapy is constructed through high-temperature carbonization and template etching.