143 results about "Dynamic Scan" patented technology

Various embodiments are disclosed for improved scanning ladar transmission, including but not limited to an example embodiment where the scanning ladar transmission system includes a spinning polygon mirror for targeting range points according to a dynamic scan pattern.

Various embodiments are disclosed for improved scanning ladar transmission, including but not limited to an example embodiment where a dynamic scan pattern for a scanning ladar transmission system includes a macro pattern having a base pattern embedded therein.

Various embodiments are disclosed for improved scanning ladar transmission, including but not limited to an example embodiment where a dynamic scan pattern for a scanning ladar transmission system includes interline skipping and detouring.

Various embodiments are disclosed for improved scanning ladar transmission, including but not limited to an example embodiment where a scanning ladar transmission system employs a spiral dynamic scan pattern.

A method and apparatus to facilitate a history trace of system bus activity in a Symmetric Multi-Processor (SMP) environment. A dynamic scan capability is provided to User (516) via Computer (504) that allows dynamic configuration of History Control Register (518), thus providing a maskable history stack of system bus activity to be obtained from History Memory (508) for subsequent analysis.

Magnetic resonance imaging uses a pulse sequence formed to include a pre-pulse, an RF excitation pulse, an encoding gradient pulse, and a reading gradient pulse. The encoding gradient pulse has an encoding amount determined to allow a data acquisition position in a k-space to be directed outward from a center of the k-space. A train of pulses including the RF excitation pulse, the encoding gradient pulse, and the reading gradient pulse is repeated to allow the number of times of data acquisition in the k-space to become larger as approaching to a central region of the k-space. The pre-pulse is formed to be reduced in an application rate to the RF excitation pulse as approaching to an outward position in the k-space. By way of example, this pulse sequence is used for contrast enhanced MRA carried out under a dynamic scan.

The DCC (Data Consistency Condition) algorithm is used in combination with MLAA (Maximum Likelihood reconstruction of Attenuation and Activity) to generate extended attenuation correction maps for nuclear medicine imaging studies. MLAA and DCC are complementary algorithms that can be used to determine the accuracy of the mu-map based on PET data. MLAA helps to estimate the mu-values based on the biodistribution of the tracer while DCC checks if the consistency conditions are met for a given mu-map. These methods are combined to get a better estimation of the mu-values. In gated MR/PET cardiac studies, the PET data is framed into multiple gates and a series of MR based mu-maps corresponding to each gate is generated. The PET data from all gates is combined. Once the extended mu-map is generated the central region is replaced with the MR based mu-map corresponding to that particular gate. On the other hand, in dynamic PET studies the uptake in the patient's arms reaches a steady state only after the tracer distributes throughout the body. Hence, for dynamic scans, the projection data of all frames is summed and used to generate the MLAA based extended mu-map for all frames.

The invention discloses a dynamic PET image denoising method based on combined image guiding. The method comprises the first step of utilizing a PET imaging device to carry out dynamic scanning and reestablishing a dynamic PET image, the second step of calculating and obtaining a combined image according to the reestablished PET image obtained in the first step, the third step of defining a guiding filter model and a kernel function of the guiding filter model, the fourth step of regarding the combined image obtained in the second step as a guiding image, and converting the model obtained in the third step to obtain an equation with a constraint target function for the single-frame dynamic PET image, and the fifth step of carrying out calculation to obtain the denoised dynamic PET image based on the linear regression method and overall parameter selection on the equation according to the result obtained in the fourth step. According to the method, the combined image serves as the guiding image, the noise of the single-frame dynamic PET image can be effectively reduced, and the quality of the dynamic PET image can be greatly improved.

The invention provides an optical acoustic ultrasound excitation and induction integrated detection device. An acoustic insulating layer, a sound absorption pad, a miniaturized semiconductor laser tube, a Fourier lens, a cylinder lens, a protection film and an annular multi-ring array sensor are all arranged in casing of the detection device and at same axle wire to form an integrated coaxial confocal structure. The multi-ring array sensor can generate ultrasonic signal, receive ultrasonic echo signal and receive optical acoustic signal by time-sharing excitation to realize optical acoustic ultrasound single or combined detection of A-type dynamic scan. The detection device has advantages of integrating excitation and induction of optical acoustic ultrasound, greatly increasing excitation and induction efficiency optical acoustic ultrasound, effectively reducing laser energy demand, increasing detection depth, and having high measurement sensitivity, simple operation and low cost. The detection device can be widely applied in fields of blood oxygen detection, blood sugar detection, HIFU therapy and effect monitoring, industrial crack detection and so on.

A nuclear medicine (NM) multi-head imaging system is provided that includes a gantry, plural detector units mounted to the gantry, and at least one processor operably coupled to at least one of the detector units. The detector units are mounted to the gantry. Each detector unit defines a detector unit position and corresponding view oriented toward a center of the bore. Each detector unit is configured to acquire imaging information over a sweep range corresponding to the corresponding view. The at least one processor is configured to, for each detector unit, determine plural angular positions along the sweep range corresponding to boundaries of the object to be imaged, generate a representation of each angular position for each detector unit position, generate a model based on the angular positions using the representation, and determine scan parameters to be used to image the object using the model.

The invention relates to a phased array ultrasonic focusing system for acoustic and resistivity imaging. The phased array ultrasonic focusing system comprises an upper computer, a transmitting module, a receiving module and a digital control and data processing module, delay time and pulse width of array elements of a phased-array transducer are calculated through a PC terminal by the upper computer according to position and depth of focus points, the delay time and the pulse width are transmitted to FPGA (field programmable gate array), transceiving control and emission focusing, deflection and dynamic scanning of a multi-channel phased array probe are achieved by the aid of programming of the FPGA, and delay information and pulse width information of the energy converter are transmitted to a beam former in real time.

The invention relates to a device and a method for processing OGS touch screens. Lasers emitted by a green ultra-short pulse laser are subjected to coaxial beam expansion through a beam expander, light beams after being expanded through the beam expander pass through a 45-degree transflective mirror, and the light path direction is changed; one path of light beams is focused on the lower surface of a work-piece through a first 3D dynamic scanning galvanometer and a first focusing mirror, and the other path of the light beams penetrates through the 45-degree transflective mirror, a second 3D dynamic scanning galvanometer and a second focusing mirror to be focused on the lower surface of the work-piece; a first coaxial charge coupled device (CCD) and a second CCD position the work-piece accurately, capture a positioning mark on the work-piece and calculate a compensation value; and the 3D dynamic scanning galvanometers lift the focus automatically during processing and the work-piece is processed from bottom to top. The two light paths perform optical focusing on the green ultra-short pulse lasers which penetrate through the work-piece to be focused on the lower surface of the work-piece, and energy of the laser is applied optimally and efficiently, and the efficiency is improved.

The invention discloses a light-emitting diode (LED) dynamic scan driving circuit capable of preventing current from overshooting. The driving circuit provided by the invention comprises an LED load circuit, a constant-current driving output circuit connected with the LED load circuit and an overshooting measurement and a control circuit connected with the constant-current driving output circuit. According to the invention, the overshooting measurement and control circuit is utilized to detect a state of the LED load circuit when the closure of all row selection pipes and the opening of constant-current output channels are carried out simultaneously; the constant-current output channels are closed or enter into a high-resistance conducting state before the row selection pipes are conducted; and the constant-current output channels are turned back to a normal constant-current output state after the row selection pipes are conducted, thus the problem of serious current overshooting occurred when the row selection pipes are changed into the conducting state from the closed state is effectively eliminated, the driving circuit is effectively protected, the display effect of LED dynamic scan driving application is improved, the gradation of grey is greatly enhanced, and the cost and power consumption of LED products are reduced.

A scan interface for an integrated circuit includes a scan clock and a scan mode signal. The scan mode signal is indicative of whether or not scan is active, and may be used by dedicated scan circuitry in integrated circuit. Such circuitry may be inactive if the scan mode indicates that scan is inactive, and active if the scan mode indicates that scan is active. For example, the scan circuitry may not toggle is scan is inactive. The scan circuitry may present a reduced load to functional circuitry if scan is inactive. In some embodiments, static and dynamic scan circuits are included for use with static and dynamic logic circuits, respectively.

Asset reconciliation is facilitated by dynamically determining and applying a scan context to asset-describing tag data. Tag data representative of assets are received from RFID tags. A working scan context defining a scope of coverage of assets to be included in an asset reconciliation is dynamically determined based on the received tag data. Additional tag data representative of additional assets are received, and the dynamically determined working scan context is applied to the additional tag data to automatically identifying which assets of the additional assets are to be included in the asset reconciliation. Assets included in the scope of coverage of the working scan context are included in the asset reconciliation, and assets not included in the scope of coverage of the working scan context are not included in the asset reconciliation.

The invention discloses a dynamic scan driving method for a smectic phase LCD (liquid crystal display). The method comprises the following steps of: scanning and driving all lines of a display screen; applying a corresponding line pulse to the scanned and driven line when each line is scanned and driven, wherein the line pulse is a high-frequency high-voltage positive and negative pulse with a duty ratio of 50%; applying zero-volt voltages to other lines free from scanning and driving; and meanwhile, applying a corresponding column pulse to each column, wherein voltage amplitudes of the line pulse applied on each line and the column pulse applied on each column can be controlled according to amount of required voltage energy caused by each display state on pixels, different distances of leading-out terminals of line distance column electrode and the different distances of the leading-out terminals of column distance line electrode. According to the dynamic scan driving method disclosed by the invention, the voltage amplitudes of the line pulse and the column pulse can be dynamically adjusted in the whole scanning and driving period, therefore, a phenomenon that the pixels with no need of being driven by high-voltage energy are driven by excessively high voltage energy can be avoided to a great degree, and power consumption is dramatically reduced.

The prior art has the problems of being incapable of monitoring the running state of a network comprehensively and accurately, understanding the change of the network structurization, and grasping the access condition on the network boundary. A method for network structure monitoring and boundary inspection provided by the invention mainly solves the problems of the prior art. The specific method for network structure monitoring and boundary inspection is carried out by the following steps of network structure dynamic scan; network boundary safety inspection; network structure updating and storage, and network structure hierarchical revelation. The method for network structure monitoring and boundary inspection collectively reveals the basic information of a network device, can carry out a real-time network scan, collects the state data and makes a hierarchically revelation on a network structure view; completes the identity type identification of a network device and an access terminal in order to confirm the network boundary; emphatically monitors a boundary device so as to timely find a violated private dual network connection happened on the network boundary, and monitors the access state of the terminal under the static norm.