30results about How to "Imaging results are accurate" patented technology

The invention discloses an imaging method and a device on the basis of orthogonal multi-frequency ultrasonic steady echo signal. The method uses an orthogonal frequency division multiplexing modulation type to form multi-frequency continuous baseband signals which are orthogonal with each other; the multi-frequency continuous baseband signals are modulated as multi-frequency ultrasonic continuous emission signals and sent out by an ultrasonic probe; the ultrasonic probe detects the steady echo signals which are reflected back; the steady echo signals are equivalent to the superposing signals; the received multi-frequency continuous baseband signals after modulation are orthogonally decomposed, each path of receiving signals are decomposed by the characteristic that each path of signals are orthogonal with each other, the amplitude of each interface reflection echo and the position thereof corresponding to the incident interface are calculated so as to carry out the image forming. The device of the invention comprises an ultrasonic probe, a control unit, and an operation unit, a receiving/emitting unit, a processing unit and a display unit which are respectively connected with the control unit; the ultrasonic probe is connected with the receiving/emitting unit; the processing unit is respectively connected with the receiving/emitting unit and the display unit; the method and the device of the invention has precise image forming and good anti-interference performance, and reduces the cost by adopting a single probe.

The invention provides a multielement array electronic scan bio-organization photoacostic layer separating imaging method and the equipment, including the steps: the pulse laser comes into the bio-tissue to produce photoacoustic signal which is collected and stored by computer; use multielement array electronic scan detector receives the photoacoustic signal, synchronously, and at the same time the computer collects and stores the photoacoustic signal; repeat collection until all the group elements are collected once; after finishing collecting, the computer makes filtering and integral processing on the optical-voice signal, and then performs layer separating imaging on the bio-organization by backward projecting algorithm. The equipment includes the laser, the multielement array electronic scan detector, the high-speed collection card and the computer. The equipment's automation level is high, convenient to operate and simpler to control and use.

The invention provides a waterborne fracturing stress measurement and induction fracture dynamic imaging integration device, and belongs to the field of ground stress testing. The waterborne fracturing stress measurement and induction fracture dynamic imaging integration device comprises a fracturing packer, an ultrasonic wave imaging system and a push-pull valve, the ultrasonic wave imaging system is arranged on a flow dividing center rod of the fracturing packer, the ultrasonic wave imaging system and the fracturing packer can descend a well together, and real-time hole wall imaging is achieved, ground stress of a hole wall rock can be rapidly measured, hydraulic fracturing measurement and induction fracture imaging can be achieved only by descending the well once, ground stress measuring efficiency is greatly improved, the ultrasonic wave imaging system dynamically images in real time, and imaging results are more accurate and reliable.

The invention discloses a near infrared fluorescence-X-ray dual mode small animal imaging equipment. The imaging equipment is composed of an excitation source, an X-ray source, an X-ray fluorescence conversion screen, a light filter, a focusing objective lens, a fluorescence detector, an object stage and a computer, wherein the wavelength of the fluorescence detector ranges from 400 nanometer to 1700 nanometer, the excitation source, the fluorescence detector, the light filter combination and the transparent object stage can be controlled through the computer, and the computer can also shoot and output images and save them. According to the near infrared fluorescence-X-ray dual mode small animal imaging equipment, objects to be imaged can be subjected to near infrared fluorescence imaging and X-ray imaging to obtain the fluorescence images, and the advantages of the two imaging modes complement each other.

The present invention provides an earthquake imaging method, and relates to the technical field of exploration. The method comprises the steps of: based on actually measured earthquake data and a dielectric root-mean-square speed model, performing pre-stack time migration imaging to obtain an initial imaging result; performing pre-stack time demigration based on the initial imaging result and thedielectric root-mean-square speed model, and obtaining initial simulation earthquake data; employing a conjugate gradient algorithm to perform solution based on the initial imaging result and the initial simulation earthquake data to obtain an imaging result corresponding to the simulation earthquake data when the errors of the simulation earthquake data and the actually measured earthquake data is smaller than or equal to a preset error as a final earthquake imaging result. The earthquake imaging method can better eliminate the fuzzification influence of an Hessian operator on the imaging result when migration imaging so as to obtain an accurate imaging result.

The invention relates to a longitudinal and transverse wave separation method without separation artifacts, and belongs to the technical field of seismic wave information processing. The invention mainly overcomes the defects in the prior art, and provides a longitudinal and transverse wave separation method without separation artifacts, which comprises the following specific steps: carrying out forward modeling by using a first-order speed-strain equation, and carrying out longitudinal and transverse wave decoupling based on the formula and a longitudinal and transverse wave decoupling equation to obtain a separated longitudinal and transverse wave speed field. According to the invention, the phase and the amplitude of the separation result are not changed, and the separation result has no separation artifact; accurate longitudinal and transverse wave separation provides support for forward modeling and understanding of seismic wave propagation, elastic waves are relatively complex due to the fact that the elastic waves include longitudinal and transverse waves, and coupling of the longitudinal and transverse waves causes inconvenience to understanding of propagation rules of a wave field during forward modeling of the wave field of the elastic waves. Accurate longitudinal and transverse wave separation provides support for elastic wave imaging, surface data longitudinal and transverse wave separation, microseism positioning and the like depending on elastic wave field continuation algorithms.

The invention belongs to the technical field of positron emission computed tomography (PET) imaging, and particularly relates to a method for rapidly marking Cys-Annexin V through <18>F and application of obtained <18>F-Al-NOTA-Cys-Annexin V in the aspect of detecting cell apoptosis. According to the method for rapidly marking Cys-Annexin V through <18>F, <18>F-Al-NOTA-Maleimide is adopted to mark Cys-Annexin V for the first time, the marking time used by the marking method is short, the marking rate is high, the fact of using <18>F for positioning and marking Cys-Annexin V is achieved, and <18>F-Al-NOTA-Cys-Annexin V maintains good affinity with PS, has a good imaging effect by serving as a PET imaging agent and has the more ideal imaging specificity.

The invention discloses a no-clean cell membrane targeting fluorescent probe and a preparation method and application thereof. Cheap carbazole monoaldehyde derivatives and 4-methylpyridinium containing sulfonate radicals are used for reaction, the compound pyridinium salt derivative Car-py with a D-pi-A conjugated structure is prepared, the fluorescent probe can be accurately positioned on a cellmembrane of a biological cell, the compound Car-py can be used for a developing test without cleaning after acting with the cell, the operation is simple, and the microstructure and dynamic change ofthe biological cell can be visually observed in real time through fluorescence microimaging.

The invention discloses a surgical imaging device which comprises an image sensor and a first supporting rod. An anti-scattering grating is mounted below the first supporting rod; the image sensor is arranged below the anti-scattering grating in the vertical direction; a support is arranged at the bottom of the image sensor; a supporting column is arranged in the center direction of the support; a lens rotating device is arranged on the right upper side of the supporting column; second supporting rods are arranged at the left-right symmetrical positions of the supporting column; and filters are arranged on the inner upper sides of the second supporting rods. According to the invention, the image sensor is used for sensing an image in real time when a patient is subjected to an operation, the image sensor is arranged below the anti-scattering grating in the vertical direction, the image sensor below the anti-scattering grating can feed back the image to a display mirror, and real-time monitoring can be guaranteed. According to the invention, the filters can absorb low-energy soft X-ray photons and balance the energy of the X-ray photons. The filters are opposite to a collimator, so that radiation of X-rays can be offset to the greatest extent.

The invention discloses an electrical sounding imaging method for unfavorable geology steering investigation of a deeply-buried long tunnel. The electrical sounding imaging method comprises the following steps of: 1, longitudinally inserting a plurality of electrodes of an electrical prospecting instrument into the ground of a to-be-detected area at equal intervals; 2, feeding back induced voltage signals to a host through an acquisition station by each electrode of the electrical prospecting instrument; 3, acquiring distributed apparent resistivity data of different depths of a vertical section below an electrode longitudinal arrangement position of the electrical prospecting instrument; 4, transversely inserting the plurality of electrodes of the electrical prospecting instrument into the ground of the to-be-detected area at equal intervals; 5, feeding back the induced voltage signals by each electrode of the electrical prospecting instrument to the host through the acquisition station; 6, acquiring distributed apparent resistivity data of different depths of a vertical section below an electrode transverse arrangement position of the electrical prospecting instrument; and 7, acquiring three-dimensional apparent resistivity data of different depths. According to the invention, three-dimensional electrical sounding imaging of a geological structure can be realized, and the detection accuracy is improved.

The invention provides a migration imaging method and device for an undulating surface. The method comprises the steps: carrying out static correction calculation of seismic data of a rugged surface through a preset horizontal unified reference surface, and obtaining CMP reference surface data; processing the seismic data of the rugged surface based on the CMP reference surface data to obtain horizontal stacking profile data; determining a preset rugged surface factor of each grid point in the horizontal superposition profile data; and carrying out wavelength continuation imaging on the horizontal superposition profile data from the rugged surface based on a preset fluctuating surface factor in the horizontal superposition profile data, and using the rugged factor for representing the rugged degree of the rugged surface and presetting the rugged surface factor of each grid point. According to the invention, migration imaging on the rugged surface can be realized, and the imaging precision is high.

The invention relates to the field of medical imaging, in particular to a medical image full-wave-field imaging device and method. The medical image full-wave-field imaging device comprises a collection platform, electric connectors, high-frequency ultrasonic transducers, a flexible film and a medium liquid, wherein a wearing opening is formed at one end of the basin-shaped collection platform, a spherical coating surface is formed to enclose the wearing opening, and a person to be detected wears the collection platform through the wearing opening; the electric connectors are distributed on the coating surface in a spherical array manner; each electric connector is electrically connected with one high-frequency ultrasonic transducer, and the high-frequency ultrasonic transducers are electrically connected with a pulse controller; the basin-shaped flexible film is positioned in the wearing opening, is tightly attached to the inner wall of the coating surface, is located on the inner side of the wearing opening to form a collection area for signal collection; and the flexible film is filled with the medium liquid. The liquid-state contact medium is designed, the energy of ultrasonic waves penetrating through a human body is increased, the wave impedance between the body surface and the outside is reduced, a stable observation system is formed, and the aim of high-precision imaging is achieved.

The invention discloses a prepressing fixed medium seismic wave propagation finite difference simulation method, which comprises the following steps of: 1) describing a wave propagation condition under a prepressing solid condition by utilizing an acoustic elasticity technology to describe an elastic wave propagation equation under a prepressing stress environment; 2) establishing a uniform layered medium model by using a known rock elastic modulus; 3) differentiating the elastic wave propagation equation by using a rotary staggered grid finite difference method; 4) applying a non-split convolution complete matching layer to the boundary of the uniform layered medium model in the step 2) to absorb the boundary; 5) carrying out acoustic elasticity simulation on the uniform layered medium model by using a rotary staggered grid finite difference method under different stress field conditions, and checking simulation precision; and (6) establishing a double-layer medium model, repeating the steps (3)-(5), and carrying out prepressing solid medium seismic wave propagation finite difference simulation to obtain seismic wave fields under different stress fields.

The invention relates to an imaging device applied to an endoscope, a light source assembly emits first-wave-band light to a measured object, the light intensity is larger than zero when the first-wave-band light penetrates into a blood vessel in the measured object, and therefore the first-wave-band light can penetrate into the blood vessel in the measured object; due to the fact that the absorption capacity of the blood vessel to the first-wave-band light is different from the absorption capacity of other tissues in the measured object to the first-wave-band light, the vein blood vessel of the measured object can be shown in the image obtained by imaging the first-wave-band light reflected by the measured object through an imaging assembly. Therefore, the image representing the deep vein morphology and distribution of the detected object can be obtained, and the imaging result of optical imaging of the detected object is more accurate.

The invention provides an electrical impedance imaging method and device, a storage medium and electronic equipment, and relates to the technical field of electrical impedance imagines.The method is applied to an electrical impedance imaging system, the electrical impedance imaging system comprises a plurality of electrodes arranged in a to-be-detected area, and the method comprises the steps that when it is detected that a disabled electrode exists in the multiple electrodes, the disabled electrode is detected, and the to-be-detected area of the to-be-detected area is detected; grouping the electrodes except the disabled electrode in the plurality of electrodes by adopting a preset electrode grouping interval to obtain a first electrode group set; taking the first electrode group set as a first excitation electrode group; taking the first electrode group set as a first measuring electrode group; and performing electrical impedance imaging on the to-be-measured area based on the first excitation electrode group and the first measurement electrode group. According to the technical scheme provided by the invention, an accurate electrical impedance imaging result can still be obtained in the presence of the disabled electrode.