8results about How to "Avoid Motion Artifacts" patented technology

The application discloses a FRET sensitized channel super-resolution SIM image reconstruction parameter estimation method and system. The method comprises the following steps: obtaining a FRET three-channel original image data set and an optical transfer function OTF after structure light modulation; obtaining a FRET three-channel spread spectrum image by using Fourier transform and spectrum shift, and obtaining reconstruction parameters of DD, DA and AA channel image sets from the FRET three-channel spread spectrum image; replacing the structure light illumination frequency vector of the DA channel with the structure light illumination frequency vector in the reconstruction parameters of the DD channel image set; obtaining the initial phase and modulation depth of the DA channel image set by using a complex linear regression algorithm containing empirical mode decomposition; performing FRET three-channel structure light super-resolution linear Wiener reconstruction, and performing data processing based on a channel sensitization intensity measurement method to measure the FRET efficiency and the donor-acceptor concentration ratio of the FRET super-resolution image. The application enhances the robustness of the SIM-FRET method for low signal-to-noise ratio image reconstruction, and expands the usability of the SIM-FRET under extremely low FRET efficiency.

The invention discloses an oral cavity three-dimensional scanning system and method based on dual-band heterogeneous structure light coding, and belongs to the technical field of optical three-dimensional scanning. The system comprises a light source, a coding light modulation device, at least two image acquisition units and a data processing unit, the light source can respectively emit first wave band light and second wave band light with different wave bands; the coding light modulator modulates the first wave band light into a main coding pattern containing discontinuous stripes and modulates the second wave band light into an auxiliary coding pattern containing continuous stripes, and the stripes of the two coding patterns are alternately arranged at intervals; the modulated first wavelength light and the modulated second wavelength light irradiate the surface of a measured area, and each image acquisition unit acquires a coded image reflected by the measured area; and the data processing unit decodes the main coding image to obtain a reference matching point pair and parallax data, decodes the auxiliary coding image based on the result to obtain a high-density extended matching point pair and extended parallax data, and completes integrated three-dimensional reconstruction through triangulation after integrating the two types of data.

The invention discloses a photoacoustic capsule endoscope and an imaging method. The photoacoustic capsule endoscope comprises a light path folding assembly, an optical collimation focusing assembly, a miniaturized internal scanning assembly, a port connecting assembly and a multi-angle imaging probe. The multi-angle imaging probe can be rapidly and conveniently replaced through the port connecting assembly so as to adapt to different types of in-vivo cavities or cavity walls of esophagus, rectum, cervix uteri and the like. By designing the internal structure of the imaging probe and introducing a novel device, the device can achieve the miniaturized size with the diameter of 5 mm and the hard length of 15 mm, the requirement for in-vivo high-degree-of-freedom rapid lossless imaging is met, the detectable area and the imaging depth are enlarged, the influence of motion artifacts and image distortion is avoided, the clinical use cost is reduced, and the application prospect is wide. And multi-angle full-space endoscopic imaging is realized.

The utility model discloses a device of cooperation children anaesthetized under magnetic resonance examination relates to medical auxiliary technical field. Including split type mattress, this split type mattress is divided into the headrest area of supporting head portion and the main body support area of bearing body, and all are by the upper pad layer and lower pad layer of interconnection composition, head adjustment subassembly is set up above headrest area, is used for adjusting the head of patient is the head -up and holds the state of the chin. The utility model can promote the safety, accuracy and comfort of children nuclear magnetic resonance scanning examination.

The invention discloses a long-term imaging device suitable for animal internal organs, including a suction cup, an airway and an airtight cap. The suction cup is provided with a through adsorption hole, the upper end opening of the adsorption hole is sealed with a glass slide, and the lower end is embedded in the chest cavity or abdominal cavity of the experimental animal; the airway is provided with a first end and a second end, the first end is connected to the adsorption hole, and the second end is detachably connected to a negative pressure source, the negative pressure source works to form a negative pressure area in the adsorption hole, and the animal internal organs are passively sucked into the adsorption hole and closely attached to the glass slide; the airtight cap is detachably connected to the second end. The invention uses an airtight cap to isolate the outside world and the internal organs during observation when it is not suitable or during the observation interval, and uses negative pressure to partially suck the internal organs into the adsorption hole during observation. The negative pressure can avoid changes in the focal plane under the microscope and motion artifacts, and improve the stability of observation and detection; the observed part of the internal organs is adjusted by negative pressure, and the field of view is changed within a certain range; and the survival rate of animals in long-term continuous experiments is improved.

The long-term imaging device comprises a suction cup, an air passage and an airtight cap, the suction cup is provided with a through adsorption hole, an upper end opening of the adsorption hole is hermetically provided with a slide, and the lower end of the adsorption hole is embedded into a thoracic cavity or an abdominal cavity of an experimental animal; the air passage is provided with a first end and a second end, the first end is communicated with the adsorption hole, the second end is detachably connected with a negative pressure source, the negative pressure source works to form a negative pressure area in the adsorption hole, and animal visceral organs are passively sucked into the adsorption hole and cling to the slide; the airtight cap is detachably connected to the second end. According to the invention, the airtight cap is used for isolating the outside and the visceral organs in an unsuitable observation period or an observation interval period, the visceral organs are partially sucked into the adsorption holes by using negative pressure during observation, and the negative pressure can avoid changes and motion artifacts of a focal plane under the microscope, so that the stability of observation and detection is improved; the observed parts of the visceral organs are adjusted through negative pressure, and the visual field is changed within a certain range; and the survival rate of animals in a long-time continuous experiment is improved.

The utility model discloses a supporting protector for cervical vertebra hyperextension and hyperexflexion magnetic resonance imaging examination, which comprises a head and neck limiting device, an angle adjusting device and a height adjusting device, and is characterized in that the head and neck limiting device simulates the head and neck characteristics to fit the head and neck, and is provided with a rear occipital supporting area and a neck and shoulder supporting area; the rear occipital part supporting area is used for supporting and limiting the rear occipital part of the head of a patient, and the neck and shoulder supporting area is used for supporting and limiting the neck and shoulders of the patient; the angle adjusting device is located below the head and neck limiting device and detachably connected with the head and neck limiting device so as to adjust the hyperextension and hyperextension angle of the cervical vertebra. The height adjusting device comprises a neck left side supporting pad and a neck right side supporting pad which are formed by splicing a plurality of sponge pads with different thicknesses, and the height adjusting device is located below the head and neck limiting device and used for supporting the neck; the device is used for supporting and protecting in cervical vertebra hyperextension and hyperexflexion magnetic resonance imaging examination, and can be suitable for different types of radio frequency coils and patients with different body types.

The application discloses a multi-scale feature fusion neural network phase unwrapping method and system based on De Bruijn stripe coding, first constructs a wavelength-De Bruijn element mapping table; then, the wrapped phase and the background intensity are obtained by using the collected deformation stripes and the background reference map, and the nonlinear cosine component and the phase gradient feature are calculated according to the wrapped phase and the background intensity, so that a multi-channel physical feature input tensor is constructed. Then, the tensor is input into a multi-scale feature fusion neural network with multiple parallel branches. In the training stage, a loss function based on symbol physical wavelength weighting is introduced for constraint. The application directly realizes high-precision prediction of phase order by a deep learning network, does not need additional auxiliary decoding sequence, effectively avoids the complex mathematical principle process and the tedious logic retrieval in the traditional phase unwrapping algorithm, and significantly improves the efficiency of three-dimensional measurement and the robustness to complex environment.