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214 results about "Multi slice" patented technology
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Method for simultaneous multi-slice magnetic resonance imaging
ActiveUS20110254548A1Reliable separationLarge possible separationMeasurements using NMR imaging systemsElectric/magnetic detectionMagnetic gradientMulti slice
A method for multi-slice magnetic resonance imaging, in which image data is acquired simultaneously from multiple slice locations using a radio frequency coil array, is provided. By way of example, a modified EPI pulse sequence is provided, and includes a series of magnetic gradient field “blips” that are applied along a slice-encoding direction contemporaneously with phase-encoding blips common to EPI sequences. The slice-encoding blips are designed such that phase accruals along the phase-encoding direction are substantially mitigated, while providing that signal information for each sequentially adjacent slice location is cumulatively shifted by a percentage of the imaging FOV. This percentage FOV shift in the image domain provides for more reliable separation of the aliased signal information using parallel image reconstruction methods such as SENSE. In addition, the mitigation of phase accruals in the phase-encoding direction provides for the substantial suppression of pixel tilt and blurring in the reconstructed images.
Owner:THE GENERAL HOSPITAL CORP
Iterative reconstruction methods for multi-slice computed tomography
InactiveUS6907102B1Avoid warpingError minimizationReconstruction from projectionMaterial analysis using wave/particle radiationHelical scanMulti slice
A multi-slice computed tomography imaging system is provided including a source that generates an x-ray beam and a detector array that receives the x-ray beam and generates projection data. A translatable table has an object thereon and is operable to translate in relation to the source and the detector array. The source and the detector array rotate about the translatable table to helically scan the object. An image reconstructor is electrically coupled to the detector array and reconstructs an image in response to the projection data using a computed tomography modeled iterative reconstruction technique. The iterative reconstruction technique includes determining a cross-section reconstruction vector, which approximately matches the projection data via a computed tomography model. Methods for performing the same are also provided including accounting for extended boundary regions.
Owner:PURDUE RES FOUND INC +2
Cerebral ischemia diagnosis assisting apparatus, X-ray computer tomography apparatus, and apparatus for aiding diagnosis and treatment of acute cerebral infarct
A cerebral ischemia diagnosis assisting apparatus comprises a storing portion for storing multi-slices or volume data with regard to the head portion of a subject, an image generating portion for generating a tomography image of a brain from the multi-slices or the volume data, an image processing portion for processing the tomography image for generating a contrast highlighting image and a brain sulci highlighting image or either thereof, and a display portion for displaying the tomography image along with the contrast highlighting image and the brain sulci highlighting image.
Owner:KK TOSHIBA +2
Method for database guided simultaneous multi slice object detection in three dimensional volumetric data
The present invention is directed to a method for automatic detection and segmentation of a target anatomical structure in received three dimensional (3D) volumetric medical images using a database of a set of volumetric images with expertly delineated anatomical structures. A 3D anatomical structure detection and segmentation module is trained offline by learning anatomical structure appearance using the set of expertly delineated anatomical structures. A received volumetric image for the anatomical structure of interest is searched online using the offline learned 3D anatomical structure detection and segmentation module.
Owner:SIEMENS MEDICAL SOLUTIONS USA INC
Method for simultaneous multi-slice magnetic resonance imaging
ActiveUS8405395B2Reliable separationLarge possible separationMagnetic measurementsElectric/magnetic detectionMagnetic gradientMulti slice
Owner:THE GENERAL HOSPITAL CORP
Methods and systems for tracking instruments in fluoroscopy
Methods and systems for displaying an instrument in a region of interest are provided. The imaging system includes a multi-slice detector, a processor coupled to the multi-slice detector, and a display configured to display reconstructed images. The processor is configured to receive a plurality of multi-slice scan data, identify at least a portion of an instrument in at least one slice of the plurality of multi-slice scan data, and display the identified instrument portion with an indicator associated with the at least one slice.
Owner:GENERAL ELECTRIC CO
Multi-slice X-ray CT apparatus and method of controlling the same
InactiveUS6445764B2Simple partsSimple configurationHandling using diaphragms/collimetersComputerised tomographsSlice thicknessMulti slice
For the purpose of reconstructing a plurality of X-ray tomographic images having a plurality of practical slice thicknesses while reducing the number of X-ray detector arrays and simplifying configuration, X-rays generated by an X-ray tube 4 are emitted via a slit 15 of a collimator 6 toward a detector 8 disposed opposite to the X-ray tube 4; the length (width) of the collimator 6's slit 15 in the D1 direction and the position of the collimator 6 in the D1 direction are adjustable; the detector 8 is comprised of four X-ray detector arrays; and the widths of the two outer X-ray detector arrays in the D1 direction are larger than the widths of the two center X-ray detector arrays.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC
Extended multi-spot computed tomography x-ray source
InactiveUS6983035B2Overcomes shortcomingRadiation/particle handlingX-ray tube electrodesMulti sliceX-ray
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC
Multi-contrast simultaneous multislice magnetic resonance imaging with binomial radio-frequency pulses
ActiveUS20180024214A1Total acquisition time is halvedImage contrast will not sufferImage enhancementImage analysisMulti bandMulti slice
In a magnetic resonance apparatus and a method for operating the MR apparatus to acquire MR data in a single scan with different contrasts, nuclear spins in multiple slices of an examination subject are simultaneously excited in a single scan, with a simultaneous multi-slice acquisition sequence, in which a radio-frequency multi-band binomial pulse is radiated.
Owner:SIEMENS HEALTHCARE GMBH
Magnetic resonance imaging apparatus
InactiveUS6442414B1Signal intensity can be more suppressedImprove imaging effectSensorsMeasurements using NMR imaging systemsMulti sliceReverse order
An MRI apparatus having an ability of displaying images of flow in different directions in distinguishable manner. When this MRI apparatus performs multi-slice acquisition with a predetermined repetition time TR by selecting a plurality of slices approximately perpendicular to the flow direction of an object to be examined, it performs a first measurement of exciting the plurality of slices in a first order and a second measurement of exciting the same slices in the opposite order to obtain two kinds of data whose signal intensity differs depending on the flow direction. The two kinds of data obtained by two measurements are subjected to subtraction operation to obtain data with different signs depending on the flow direction. These signs combined with the signal intensity are made into images where flow in opposite directions are distinctively depicted. In the multi-slice acquisition, slices are selected so that adjacent slices partially overlap in the direction of the thickness of the slice. Thereby signals of a static part can be suppressed and contrast of flow images after substraction can be enhanced. EPI method of very short imaging time can be employed for the imaging sequence of MRA according to the present invention.
Owner:HITACHI MEDICAL CORP
Multi-slice flat panel computed tomography
ActiveUS7095028B2Increase frame rateShorten the timeTelevision system detailsMaterial analysis using wave/particle radiationMulti sliceAudio power amplifier
A method for collecting signals from a detector that has a plurality of lines of image elements includes sending a control signal to a gate driver to select transistor gates for two or more lines of image elements, and simultaneously passing signals from the two or more lines of image elements to charge amplifiers that are coupled to the image elements. A method for collecting signals from a detector that has a plurality of imagers is provided. Each of the imagers has a plurality of lines of image elements. The method includes sending a control signal to a gate driver to select one or more lines of image elements on each of the plurality of the imagers, and simultaneously passing signals from the selected one or more lines of image elements on each of the plurality of the imagers to charge amplifiers that are coupled to the image elements.
Owner:VAREX IMAGING CORP
Extended multi-spot computed tomography x-ray source
InactiveUS20050063514A1Overcomes shortcomingRadiation/particle handlingX-ray tube electrodesMulti sliceX-ray
Systems and methods for obtaining multi-slice images having a total thickness of up to about 160 mm or more in a single gantry rotation in computed tomography or volume computed tomography are described. One embodiment comprises an extended, multi-spot x-ray source for computed tomography or volume computed tomography imaging, comprising: an electron gun capable of producing a plurality of electron beams, each electron beam focused at a predetermined distance and aimed in a predetermined direction; and a plurality of targets positioned to receive the electron beams and generate x-rays in response thereto, each target comprising a predetermined focal spot thereon, wherein each electron beam is synchronized to strike, at an appropriate time, a predetermined target comprising a predetermined focal spot thereon.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC
Multi-slice two-dimensional phased array assembly
A two-dimensional phased array beam former comprising at least first and second chips having each top and bottom surfaces, the bottom surface of the first chip being attached to the top surface of the second chip; the first and second chips having each an emitter side surface, the emitter side surfaces of the first and second chips facing a same direction and comprising each a plurality of emitters; wherein each of said first and second chips comprises at least one conductive post extending between said top and bottom surfaces; the at least one conductive post of the first chip being vertically aligned with and connected to the at least one conductive post of the second chip.
Owner:HRL LAB
Fast Prospective Motion Correction For MR Imaging
InactiveUS20170016972A1Wide rangeImprove image qualityMeasurements using NMR imaging systemsMulti sliceResonance
A magnetic resonance (MR) method and system are provided for generating real-time prospective motion-corrected images using fast navigators. The real-time motion correction is achieved by using a 2D EPI navigator that is obtained using a simultaneous multi-slice blipped-CAIPI technique. The navigator parameters such as field of view, voxel size, and matrix size can be selected to facilitate fast acquisition while providing information sufficient to detect rotational motions on the order of several degrees or more and translational motions on the order of several millimeters or more. The total time interval for obtaining and reconstructing navigator data, registering the navigator image, and providing feedback to correct for detected motion, can be on the order of about 100 ms or less. This prospective motion correction can be used with a wide range of MR imaging techniques where the pulse sequences do not have significant intervals of “dead” time.
Owner:SIEMENS HEALTHCARE GMBH +1
Method for intravascular ultrasound multi-slice shear wave elastography
InactiveCN104055541AAchieve early diagnosisStrengthening Early Diagnosis CapabilitiesOrgan movement/changes detectionSurgeryPulse beamMulti slice
The invention discloses a method for intravascular ultrasound multi-slice shear wave elastography. The method comprises the following steps of recording an original ultrasound echo signal of a tissue to be detected; enabling an interventional ultrasound array probe to generate acoustic radiation force by virtue of a short-pulse signal controlled by a computer; emitting ultrasonic pulse beams for many times to accept and detect a propagation process of shear waves generated by the acoustic radiation force; analyzing the propagation speed of the shear waves in the tissue to be detected to obtain a wave speed distribution image of the shear waves in the tissue; performing wave speed mapping on the shear waves at each position in the tissue to be detected to obtain a quantitative elastic image of the intravascular tissue. The method has the advantages of real time performance, quantification, high speed, high resolution and the like; a multi-array element intravascular transducer array is used for performing vascular wall tissue elastic information quantitative analysis to excite and track the shear waves; the further popularization and application of intravascular elastography are favorably promoted, and the early diagnosis capability of people in cardiovascular diseases is enhanced.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Multi-slice cerebral blood flow imaging with continuous arterial spin labeling MRI
This invention is a method for multi-slice CBF imaging using continuous arterial spin labeling (CASL) with an amplitude modulated control which is both highly effective at controlling for off resonance effects, and efficient at doubly inverting inflow spins, thus retaining the signal advantages of CASL versus pulsed ASL techniques.
Owner:THE TRUSTEES OF THE UNIV OF PENNSYLVANIA
Magnetic resonance imaging for a plurality of selective regions set to object continuously moved
InactiveUS7110805B2Suppress artifactsEffective treatmentDiagnostic recording/measuringMeasurements using NMR imaging systemsMulti sliceSelective excitation
MRI echo data is acquired by performing selective-excitation on regions composed of multi-slices of an object, while the object is moved continuously. The positions of the multi-slices are moved within a predetermined imaging range fixedly determined by an MRI system, according to object movement. This allows positions of the multi-slices to be changed in compliance with the moved object, so that the multi-slices positionally track with the object within the imaging range. Accordingly, a multi-slice imaging technique can be provided, which is executable during even continuous movement of the object.
Owner:TOSHIBA MEDICAL SYST CORP
Method of automatically detecting pulmonary nodules from multi-slice computed tomographic images and recording medium in which the method is recorded
InactiveUS20050063579A1Improve accuracyAutomatic detectionImage enhancementImage analysisPulmonary noduleMulti slice
A method of automatically detecting pulmonary nodules is provided, including the operations of acquiring a chest computed tomography (CT) image, extracting a lung region from the chest CT image, extracting a group of nodule candidates from the lung region using a gray-level thresholding technique and a three-dimensional (3-D) region growing technique, and performing 3-D feature recursive analysis on all of the nodule candidates.
Owner:ELECTRONICS & TELECOMM RES INST
Method for fast multi-slice mapping of myelin water fraction
InactiveUS20090312625A1Increasing volume coverageShorten the construction periodMagnetic measurementsCharacter and pattern recognitionDiseaseMulti slice
Mapping of myelin water content in white matter may provide important information for early diagnosis of multiple sclerosis and the detection of white matter abnormality in other diseases. It is disclosed here that free induction decay (FID) of each voxel at multiple slice locations is acquired in the brain using an echo-planar spectroscopic imaging (EPSI) pulse sequence. The multi-slice EPSI acquisition is designed to have a short first echo time (˜2 ms) and echo-spacing (˜1 ms) in order to acquire multiple sampling points during the fast decay of the myelin water signal. Multi-compartment analysis is then applied to the FID in each pixel using a 3-pool model of white matter to obtain quantitative maps of the myelin water fraction. Using this technique, the MR data for whole brain mapping of the myelin water can be acquired in less than 10 minutes, making this technique feasible for routine clinical applications.
Owner:UNIV OF COLORADO THE REGENTS OF
Multi-slice computer tomography system with data transfer system with reduced transfer bandwidth
ActiveUS7254210B2Low costAvoid lostRadiation/particle handlingComputerised tomographsMulti sliceX-ray
Owner:SIEMENS HEALTHCARE GMBH
Method and magnetic resonance apparatus for simultaneous multi-contrast turbo spin echo imaging
In a magnetic resonance apparatus and method for acquiring magnetic resonance data, a magnetic resonance data acquisition scanner executes a turbo spin echo (TSE) data acquisition sequence with simultaneous multi-slice (SMS) imaging wherein nuclear spins in two different slices of an examination subject are simultaneously excited so as to produce respective echo trains. The magnetic resonance data acquisition scanner is operated with the SMS imaging configured so that magnetic resonance signals from the respective slices have a different contrast, with the SMS being configured to allow evolution of magnetization of the nuclear spins for the second contrast while magnetic resonance signals with the first contrast are being detected. The respective magnetic resonance signals from the two different slices are detected and entered into an electronic memory organized as k-space, as k-space data.
Owner:SIEMENS HEALTHCARE GMBH
Multi-slice cerebral blood flow imaging with continuous arterial spin labeling MRI
Owner:THE TRUSTEES OF THE UNIV OF PENNSYLVANIA
Electron beam computed tomographic scanner system with helical or tilted target, collimator and detector components to eliminate cone beam error and to scan continuously moving objects
InactiveUS7020232B2Reduce system costReduce computational overheadReconstruction from projectionHandling using diffraction/refraction/reflectionHelical scanMulti slice
A scanning electron beam computed tomographic system eliminates axial offset between target and detector by disposing the target, collimator, and detector such that active portions of the target and detector are always diametrically opposite each other. This result is achieved by providing a helical target, collimator, and detector, or by providing planar target, collimator, and detector components that are inclined relative to the vertical axis such that active portions of the target and detector are always diametrically opposite each other. Either configuration eliminates cone beam error and the necessity to correct for same. Further, the system can provide multi-slice scanning of an object that is in constant motion at a critical velocity, without having to interpolate data. Conventional helical scanning may still be undertaken. Detector elements can be disposed axially to improve signal / noise ratio and to produce a cone beam cancellation effect.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC
Operation of a multi-slice processor with an expanded merge fetching queue
InactiveUS20170277542A1Memory architecture accessing/allocationMemory adressing/allocation/relocationLoad instructionMulti slice
Operation of a multi-slice processor that includes a plurality of execution slices and a plurality of load / store slices, where each load / store slice includes a load miss queue and a load reorder queue, includes: receiving, at a load reorder queue, a load instruction requesting data; responsive to the data not being stored in a data cache, determining whether a previous load instruction is pending a fetch of a cache line comprising the data; if the cache line does not comprise the data, allocating an entry for the load instruction in the load miss queue; and if the cache line does comprise the data: merging, in the load reorder queue, the load instruction with an entry for the previous load instruction.
Owner:IBM CORP
Simultaneous multi-slice multi-echo turbo spin echo (TSE) imaging
In a method and apparatus for acquiring magnetic resonance (MR) raw data, an MR data acquisition scanner is operated to execute a turbo spin echo (TSE) or a turbo gradient spin echo (TGSE) sequence wherein nuclear spins are excited in multiple slices of the examination object simultaneously by radiating at least one radio-frequency (RF) pulse from an RF radiator of the MR data acquisition scanner, thereby causing the excited nuclear spins in said multiple slices to produce an echo train. A multi-band refocusing pulse is radiated that refocuses nuclear spins in at least one of said multiple slices that follows a first of the multiple slices, and readout gradients are activated to acquire MR signals, with respectively different contrasts, at respectively different readout times of the echo train. The read out MR signals are entered into an electronic memory organized as k-space.
Owner:SIEMENS HEALTHCARE GMBH
Magnetic resonance imaging apparatus
InactiveUS6097185AReduce radiationImage contrast can be uniformDiagnostic recording/measuringSensorsMulti sliceSingle image
An MRI apparatus essentially consisting of a static magnetic field generating system, a gradient magnetic field generating system, a transmission system, a receiving system, a sequencer, a signal processing system and means for displaying the resulting image, wherein the sequencer generates a pulse sequence comprising pulse sequence units each including applying of radio frequency magnetic field pulses for exciting a plurality of slices, the pulses being in a number identical to the number of the slices, applying subsequently sequentially of a plurality of 180 DEG pulses each for simultaneously exciting all of the slices, and acquisition of echo signals for each slice; and the signal processing system arranges the acquired echo signals for a single image on a k-space for each slice in accordance with the phase encoding and performs image reconstruction operation using the signals. The MRI apparatus of the present invention reduces the number of RF pulses applied and enables fast multi-slice imaging.
Owner:HITACHI MEDICAL CORP
RF field mapping for magnetic resonance imaging
ActiveUS7446526B2Lifts the dependence of TRFast imagingMagnetic measurementsElectric/magnetic detectionRf fieldMulti slice
For in vivo magnetic resonance imaging at high field (≧3 T) it is essential to consider the homogeneity of the active B1 field (B1+), particularly if surface coils are used for RF transmission. A new method is presented for highly rapid B1+ magnitude mapping. It combines the double angle method with a B1-insensitive magnetization-reset sequence such that the choice of repetition time (TR) is independent of T1 and with a multi-slice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds.
Owner:THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIV
Multi-slice double inversion-recovery black-blood imaging with simultaneous slice re-inversion
ActiveUS7315756B2Enabling visual evaluationClearly visibleDiagnostic recording/measuringSensorsBlack bloodMulti slice
A multi-slice double inversion recovery (DIR) pulse sequence with read out of a signal for imaging successive slices implemented on a magnetic resonance image scanner. In the method, when the DIR pulse sequence is applied before imaging each slice, a slab-selective inversion re-inverts the entire slab that includes all of the slices. All slices are imaged within a predefined repetition time (TR). The number, N, of slices acquired per TR controls the inversion time to execute the read out of the signal for imaging each slice at a zero-crossing point of blood. In a test, multi-slice DIR images of carotid arteries were obtained with N ranging from 2-8, for four subjects. The results were compared with those for both standard single-slice DIR, and inflow saturation techniques. Multi-slice DIR with N=2-6 provided blood flow suppression in carotid arteries similar to that of single-slice DIR, and significantly better than inflow saturation.
Owner:UNIV OF WASHINGTON
Method of producing cardiac tomogram and tomograph using x-ray ct apparatus
InactiveUS7006593B2Less motion artifactImprove image qualityMaterial analysis using wave/particle radiationRadiation/particle handlingHelical scanMulti slice
In an X-ray CT apparatus having a multi-slice detector, the retrospective ECG (Electrocardiography) gating imaging is applied to helical scans. Discontinuity of projection data generated in the scans is interpolated using data at a heartbeat time phase in 180-degree opposite relation to reduce motion artifacts. Further, projection data at an arbitrary slicing position and in at arbitrary heartbeat time phase are formed utilizing continuous divided projection data obtained above, and by properly combining or gathering them, a tomogram of whole heart, a three-dimensional image thereof, and further, a three-dimensional cardiac moving image in heartbeat time phases with an arbitrary time interval can be continuously and smoothly created.
Owner:FUJIFILM HEALTHCARE CORP
Multi-Plane/Multi-Slice Processing For 2-D Flow Imaging in Medical Diagnostic Ultrasound
ActiveUS20090306513A1Easy accessBlood flow measurement devicesCharacter and pattern recognitionSonificationMulti slice
A volumetric method for 2-D flow imaging is provided in medical diagnostic ultrasound. Flow data for a volume is acquired. For more rapid acquisition, broad beam transmission and reception along many scan lines distributed in the volume is used. The volumetric flow data is filtered, such as by calculating statistical information, to generate a planar / 2-D flow image. The statistical information from the three-dimensional flow data is used to determine the display values for the flow imaging.
Owner:SIEMENS MEDICAL SOLUTIONS USA INC
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