64results about How to "Imaging time is short" patented technology

The invention discloses a millimeter wave holographic three-dimensional imaging-based human body security inspection system and method. The millimeter wave holographic three-dimensional imaging-based human body security inspection system includes an inspection room, a mechanical scanning mechanism, a millimeter wave transmitting-receiving unit, an image processing unit and an alarm unit; the mechanical scanning mechanism is used for driving the millimeter wave transmitting-receiving unit to move simultaneously relative to people to be inspected in a horizontal direction and a vertical direction; the millimeter wave transmitting-receiving unit is used for transmitting millimeter wave signals to the people to be inspected and receiving millimeter wave signals reflected from the people to be inspected; the image processing unit is used for performing holographic three-dimensional imaging on the bodies of the people to be inspected so as to obtain three-dimensional image of the bodies; and the alarm unit is used for comparing the three-dimensional images of the bodies with secure body three-dimensional images pre-stored in the alarm unit, and emitting alarms if the three-dimensional image of the bodies are not matched with the secure body three-dimensional images pre-stored in the alarm unit. According to the millimeter wave holographic three-dimensional imaging-based human body security inspection system of the invention, mechanical scanning is adopted to replace electric scanning. The millimeter wave holographic three-dimensional imaging-based human body security inspection system has the advantages of low cost, simple structure, short production period, high resolution, fast imaging time and wide application.

The invention discloses a passive millimeter wave imaging system and relates to a millimeter wave imaging system. The passive millimeter wave imaging system solves the problems of long imaging time ofthe system, poor real-time property and low resolution of an obtained image caused by the way of focal plane array imaging of the existing millimeter wave imaging system. A metal reflection plate ofthe passive millimeter wave imaging system reflects electromagnetic waves radiated by a target to be tested onto a receiving antenna by aggregation via a medium lens, the received signals are processed by a millimeter wave band high-gain low-noise amplifier, a high-sensitivity square law detector, a low-pass filter and a low-frequency amplifier in sequence and then collected by a digital collection circuit, and the collected signals are transmitted into a computer for carrying out imaging processing. The passive millimeter wave imaging system is applicable to the field of security.

A scanning image display system which includes a plurality of scanning image displays each including a light source adapted to emit a laser beam, and a scan unit having a first scan section adapted to scan the laser beam emitted from the light source in a first direction on a projection surface, and a second scan section adapted to scan the laser beam in a second direction substantially perpendicular to the first direction. The first scan sections are resonant scan sections which are faster than the second scan sections in scan speed. The first scan sections are heated with light during the time that an image is formed and a reset period of the second scan sections in order to control resonant frequencies of the first scan sections.

The invention relates to a medical image imaging method and device, computer equipment and a storage medium. The method comprises the steps of obtaining an original medical image and segmentation information; performing gray correction and image enhancement on the original medical image to obtain a to-be-segmented image; segmenting a plurality of regions of interest from the to-be-segmented imagebased on the segmentation information; inputting each region of interest into the combined prediction model to obtain a prediction probability corresponding to each region of interest; and generatinga target medical image according to each prediction probability. By adopting the method, the time can be shortened, and no side effect is generated to patients.

The invention discloses a linear frequency modulation-based multi-human body safety inspection apparatus. The linear frequency modulation-based multi-human body safety inspection apparatus includes a scanning device, millimeter wave transmitting-receiving assemblies and an image processing unit; the scanning device comprises a plurality of detection seats and a plurality of guide rails arranged on the detection seats, and a motor; each guide rail is provided with one set of millimeter wave transmitting-receiving assembly; the millimeter wave transmitting-receiving assemblies are driven by the motor so as to move relative to people to be inspected; the millimeter wave transmitting-receiving assemblies are used for transmitting millimeter wave signals to the people to be inspected and receiving millimeter wave signals reflected by the people to be inspected; and the image processing unit is used for performing holographic three-dimensional imaging on the bodies of the people to be inspected so as to obtain three-dimensional image of the bodies. The invention also discloses a linear frequency modulation-based multi-human body safety inspection method. The linear frequency modulation-based multi-human body safety inspection apparatus of the invention has the advantages of low price, simple structure, easiness in integration and high resolution, and can detect a large number of peoples in per unit time and causes no radiation hazards to human bodies.

A method for reducing PROPELLER MRI data acquisition times, by combining k-space under-sampling and iterative reconstruction using NUFFT, while maintaining similar image quality as in PROPELLER MRI with sufficient k-space sampling. Iterative image reconstruction using NUFFT minimizes image artifacts produced with conventional PROPELLER image reconstruction in under-sampled acquisitions. The data acquisition and image reconstruction parameters are selected in order to achieve image quality similar to that of sufficiently-sampled PROPELLER acquisitions for significantly shorter imaging time. An advantage of using under-sampled PROPELLER imaging is a reduction in acquisition time by as much as 50% without introducing significant artifacts, and while maintaining other benefits of PROPELLER imaging.

A head mount display includes a first frame, a display, a second frame, and a junction. The display is mountable on the first frame. The second frame is configured to be pivotably connected to the first frame and includes a circuit module. The circuit module includes a power circuit configured to supply power to the display. The junction is configured to electrically connect the display and the circuit module.

A method for forming images on a silver halide color photographic photosensitive material having a substrate and photographic structural layers thereon, including, at least three silver halide color photosensitive layers having different photosensitive regions, respectively, and at least one non-photosensitive hydrophilic colloid layer is disclosed. At least one of the photosensitive layers contains 90 mol % or more of silver chloride. Shortly after the silver halide color photographic photosensitive material has been scan-exposed with laser beams, the material is rapid-processed with a low replenishing amount.

Disclosed is an X-ray imaging device, the device including: an X-ray radiation unit for radiating X-rays to the predetermined target areas of an object to be imaged in respective imaging positions; an X-ray sensing unit for receiving the X-rays; a movement unit for arranging the X-ray radiation unit and the X-ray sensing unit to allow the X-ray radiation unit and the X-ray sensing unit to face each other in the respective imaging positions, with the object located therebetween; a position information provision unit for providing position information of the X-ray radiation unit and the X-ray sensing unit, position information of the variable rotary shaft, and position information of the target areas; a control unit for controlling the X-ray radiation unit, the X-ray sensing unit, and the movement unit; and an image processing unit for producing three-dimensional images of the object from the projection data.

A method for driving a charge-transfer type solid-state image pick-up device, wherein the charge-transfer type solid-state image pick-up device comprises: high sensitivity photoelectric conversion elements for executing photoelectric conversion with relatively high sensitivity; low sensitivity photoelectric conversion elements for executing photoelectric conversion with relatively low sensitivity; and vertical transfer channels for transferring signal charges from said high sensitivity photoelectric conversion elements and said low sensitivity photoelectric conversion elements, the method comprising a charge transfer step of individually reading / transferring first signal charges from said high sensitivity photoelectric conversion elements and second signal charges from said low sensitivity photoelectric conversion elements onto said vertical transfer channels, without executing a high speed charge transfer operation for the vertical transfer channels after exposure of said solid-state image pick-up device.

The invention discloses a modular foundation slope radar monitoring system, which consists of a modular foundation slope radar, a PSD camera and a slope, wherein the modular foundation slope radar iscomposed of a combined reflective array surface, a primary feed source, a transmitting and receiving channel and a data processing module, the combined reflective array surface is formed by splicing aplurality of modular reflective array surfaces, and each modular reflective array surface is composed of more than three non-collinear feature light spots and a plurality of basic reflection units; the PSD camera is used for quickly measuring the position coordinates of each basic reflection unit; and the primary feed source radiates electromagnetic waves, irradiates the combined reflective arraysurface, forms a high-gain pencil beam in the specified direction through adjusting the phase compensation of each basic reflection unit, carries out rapid electrical scanning on the slope and key monitoring points, receives an echo signal, transmits the echo signal to the data processing module via the transmitting and receiving channel to obtain a three-dimensional radar image and an interferometric phase diagram and calculates the displacement and deformation of the slope.

The invention discloses a short-range millimeter wave fast three-dimensional imaging method with an arbitrary linear array configuration. The method comprises the following steps of constructing an echo signal and an imaging formula; performing NUFFT or FFT on a coordinate dimension in the echo signal; transforming the spectral domain data in the four-dimensional space into three dimensions by dimension reduction; using NUFFT for imaging. The short-range millimeter wave fast three-dimensional imaging method with an arbitrary linear array configuration provided by the invention, directed to a short-range millimeter-wave three-dimensional imaging system of "MIMO-plane scan" mode, can achieve accurate and fast three-dimensional imaging of arbitrary MIMO line array configuration with short required time-consuming for imaging and low computational complexity by adopting a "fast Gaussian mesh" based NUFFT technology.

A head mount display includes a first frame, a display, a second frame, and a junction. The display is mountable on the first frame. The second frame is configured to be pivotably connected to the first frame and includes a circuit module. The circuit module includes a power circuit configured to supply power to the display. The junction is configured to electrically connect the display and the circuit module.

The invention discloses a production method for a quick imaging sequence single-short EPI-SSFP (Echo Planar Imaging-Steady-State Free Procession). The method comprises the following steps: setting an MRI (Magnetic Resonance Imaging) system through a selected EPI sequence template to obtain an initial state of the MRI system; calculating a deflection angle of an input radio frequency signal RF according to the selected True-SSFP sequence template; calculating the signal intensity applied to a level selective gradient in the MRI system and the time of duration according to the deflection angle; exciting the MRI system according to the calculated signal intensity and the time of duration during inputting the radio frequency signal, so as to obtain an initial single-shot EPI-SSFP sequence; then performing steady state processing for the sequence to obtain the quick imaging sequence single-shot EPI-SSFP. With the adoption of the method, the single-shot EPI-SSFP imaging quality is highly superior to that of EPI sequence, and the imaging time is highly less than that of the True-SSFP sequence, and the imaging quality meets the clinical requirement; in addition, the imaging time is short, the examination time of a patient is reduced, and thus the mobility of the patient is improved.

The invention discloses a terahertz tomography system based on three-dimensional Radon transformation and an imaging method and an operation method thereof. The imaging system comprises a terahertz emission source, a sample table, a beam conversion unit, a terahertz detection array, a support frame and a lifting frame which are arranged along the transmission direction of a terahertz beam opticalpath. The sample table is arranged on the support frame through a vertical shaft rotating stepping motor; the beam conversion unit comprises a first diffractive optical element and a second diffractive optical element; and a lifting stepping motor is arranged on the lifting frame, an output shaft of the lifting stepping motor is connected with a horizontal shaft rotating stepping motor, and an output shaft of the horizontal shaft rotating stepping motor is connected with a U-shaped frame. The terahertz tomography system based on three-dimensional Radon transformation and the imaging method andthe operation method thereof have the advantages of being good in imaging stability, short in imaging time, high in imaging resolution and large in imaging depth of field.

The invention relates to a high-speed imaging method and system of an undersampling grating scanning atomic force microscope. The high-speed imaging method comprises the following steps of firstly, designing an undersampling grating scanning mode, and accordingly generating an undersampling grating scanning pattern; secondly, constructing a corresponding measurement matrix according to the generated undersampling grating scanning pattern; and finally, re-constructing atomic force microscope image according to the measurement matrix and a compression sensing theory. By the high-speed imaging method, the atomic force microscope imaging speed can be increased.

The invention discloses a virtual face contour adjustment method. The method is realized through steps of obtaining human face three-dimensional image data; determining an index with high correlationwith the human face contour; obtaining the result of the high correlation index based on the human face three-dimensional image data; performing virtual adjustment of the facial contour based on the result of the high correlation index; repeating a step 3, and determining whether the aesthetic effect of a three-dimensional image of the facial contour obtained after virtual adjustment meets the requirement or not in combination with visual judgment of a person. The method is advantaged in that a simulation stereo image is matched with the determination of the high correlation index of the humanface contour, a subjective error and the ineffectiveness of the low correlation index determined by the traditional aesthetic standard on improvement of the human face can be effectively improved, virtual face contour adjustment is carried out to facilitate formulation of a highly optimized surgery implementation scheme, and the improvement effect of the face contour is improved.

An image analysis device for analyzing a magnetic resonance image obtained from a living body includes a phase difference distribution creating unit configured to create a phase difference distribution of a magnetic resonance image obtained from a predetermined area of the living body, a fitting unit configured to fit the phase difference distribution created by the phase difference distribution creating unit with a plurality of function groups, and a verifying unit configured to verify normality of the living body included in the predetermined area, based on the magnetic susceptibility of the tissue included in the predetermined area determined on the basis of the parameters of the plurality of function groups fit to the phase difference distribution by the fitting unit.

The invention discloses a passive millimeter wave imaging system and relates to a millimeter wave imaging system. The passive millimeter wave imaging system solves the problems of long imaging time of the system, poor real-time property and low resolution of an obtained image caused by the way of focal plane array imaging of the existing millimeter wave imaging system. A metal reflection plate ofthe passive millimeter wave imaging system reflects electromagnetic waves radiated by a target to be tested onto a receiving antenna by aggregation via a medium lens, the received signals are processed by a millimeter wave band high-gain low-noise amplifier, a high-sensitivity square law detector, a low-pass filter and a low-frequency amplifier in sequence and then collected by a digital collection circuit, and the collected signals are transmitted into a computer for carrying out imaging processing. The passive millimeter wave imaging system is applicable to the field of security.

The invention discloses an imaging method and device for a self-luminous object on a biological sample film. The imaging device comprises a shell, a photoelectric conversion element and image correction equipment, a darkroom space is formed in the shell; the photoelectric conversion element is arranged in the shell; the photoelectric conversion element is used for acquiring a first dark field image inside the shell when the biological sample film is not placed; after the biological sample film is attached to the surface of the photoelectric conversion element, the photoelectric conversion element is also used for acquiring a second dark field image in the shell; and the image correction equipment is used for correcting the second dark field image according to the first dark field image toobtain a target image corresponding to the self-luminous object. According to the invention, the target image of the self-luminous object with higher definition can be effectively and more accuratelyacquired, the operation process is simple, the imaging time is shorter, and the imaging device has the advantages of small structure, low manufacturing cost, convenience in operation, convenience in carrying and the like.

Before an observation region of an imaging optical system (14) reaches an observation position in the cultivation container (50), a vertical position of the cultivation container (50) at the observation position is precedently detected by an auto-focus displacement sensor. In a case where an objective lens is moved in an optical axis direction on the basis of the position, an error between the precedently detected vertical position of the stage (51) at the observation position and a vertical position of the stage (51) at a time point when the observation region of the imaging optical system (14) is scanned up to the observation position is acquired, and the objective lens is moved in the optical axis direction on the basis of the error.

A gamma camera, a system, and a method are described, wherein a large gamma camera can be subdivided into two or more smaller gamma cameras, each independently positioned for SPECT data acquisition. These transformable gamma cameras make more efficient use of the gamma photon detector area. Tiled arrays of semiconductor gamma detectors are especially suited for such transformation.

One embodiment provides a gamma camera system, including: a stand, a rotatable gantry supported by the stand, and a transformable gamma camera connected by mechanical supports to the rotatable gantry and comprising groups of tiled arrays of gamma detectors and a collimator for each group of tiled arrays of gamma detectors; the transformable gamma camera being configured to subdivide into a plurality of subdivided gamma cameras, each of the subdivided gamma cameras having at least one of the groups of tiled arrays of gamma detectors and corresponding collimator, wherein the subdivision into a plurality of subdivided gamma cameras facilitates contouring with a region of interest for a spatial resolution. Other embodiments are described and claimed.

Provided are a captured image evaluation apparatus, a captured image evaluation method, and a captured image evaluation program capable of evaluating a thickness and a density of stacked cultured cells in a short imaging time. The captured image evaluation apparatus includes: an image acquisition section 52 that acquires captured images obtained by imaging a subject under a condition in which a numerical aperture of an objective lens is changed; a thickness estimation section 53 that estimates a thickness of the subject on the basis of a low NA captured image obtained under a condition in which the numerical aperture of the objective lens is relatively small; and a density estimation section 54 that estimates a density of the subject on the basis of a high NA captured image obtained under a condition in which the numerical aperture of the objective lens is relatively large.

Before an observation region of the imaging optical system reaches an observation position in a culture container, a vertical position of the culture container at the observation position is precedently detected by an auto-focus displacement sensor. In a case where an auto-focus control is performed on the basis of the position, an error between the precedently detected vertical position of the container at the observation position and a vertical position of the container at a time point when an observation region of the imaging optical system is scanned up to the observation position is acquired, and an objective lens is moved in an optical axis direction on the basis of the error.