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410 results about "Computer tomographic" patented technology

• TOMOGRAPH (noun) The noun TOMOGRAPH has 1 sense: 1. X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements. Familiarity information: TOMOGRAPH used as a noun is very rare. Dictionary entry details.

Cone-beam computerized tomography with a flat-panel imager

A radiation therapy system that includes a radiation source that moves about a path and directs a beam of radiation towards an object and a cone-beam computer tomography system. The cone-beam computer tomography system includes an x-ray source that emits an x-ray beam in a cone-beam form towards an object to be imaged and an amorphous silicon flat-panel imager receiving x-rays after they pass through the object, the imager providing an image of the object. A computer is connected to the radiation source and the cone beam computerized tomography system, wherein the computer receives the image of the object and based on the image sends a signal to the radiation source that controls the path of the radiation source.
Owner:WILLIAM BEAUMONT HOSPITAL

Simulation method for designing customized medical devices

The invention provides a system for virtually designing a medical device conformed for use with a specific patient. Using the system, a three-dimensional geometric model of a patient-specific body cavity or lumen is reconstructed from scanned volume images such as obtained x-rays, magnetic resonance imaging (MRI), computer tomography (CT), ultrasound (US), angiography or other imaging modalities. Knowledge of the physical properties of the cavity / lumen is obtained by determining the relationship between image density and the stiffness or elasticity of tissues in the body cavity or lumen and is used to model interactions between a simulated device and a simulated body cavity or lumen.
Owner:AGENCY FOR SCI TECH & RES +1

Assisted Guidance and Navigation Method in Intraoral Surgery

An assisted guidance and navigation method in intraoral surgeries is a method using computerized tomography (CT) photography and an optical positioning system to track medical appliances, the method including: first providing an optical positioning treatment instrument and an optical positioning device; then obtaining image data of the intraoral tissue receiving treatment through CT photography, precisely displaying actions of the treatment instrument in the image data, and real-time checking an image and guidance and navigation. Therefore, during the surgery, the existing use habits of the physicians are not affected and accurate and convenient auxiliary information is provided, and attention is paid to using the treatment instrument in physical environments such as a patient's tooth or dental model.
Owner:HUANG JERRY T +1

Hybrid stent and method of making

A stent is formed by encasing or encapsulating metallic rings in an inner polymeric layer and an outer polymeric layer. At least one polymer link connects adjacent metallic rings. The stent is drug loaded with one or more therapeutic agent or drug, for example, to reduce the likelihood of the development of restenosis in the coronary arteries. The inner and outer polymeric materials can be of the same polymer or different polymer to achieve different results, such as enhancing flexibility and providing a stent that is visible under MRI, computer tomography and x-ray fluoroscopy.
Owner:ABBOTT CARDIOVASCULAR

Radiolabeled irreversible inhibitors of epidermal growth factor receptor tyrosine kinase and their use in radioimaging and radiotherapy

Radiolabeled epidermal growth factor receptor tyrosine kinase (EGFR-TK) irreversible inhibitors and their use as biomarkers for medicinal radioimaging such as Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) and as radiopharmaceuticals for radiotherapy are disclosed.
Owner:YISSUM RES DEV CO OF THE HEBREWUNIVERSITY OF JERUSALEM LTD +1

Multimodal silica-based nanoparticles

The present invention provides a fluorescent silica-based nanoparticle that allows for precise detection, characterization, monitoring and treatment of a disease such as cancer. The nanoparticle has a range of diameters including between about 0.1 nm and about 100 nm, between about 0.5 nm and about 50 nm, between about 1 nm and about 25 nm, between about 1 nm and about 15 nm, or between about 1 nm and about 8 nm. The nanoparticle has a fluorescent compound positioned within the nanoparticle, and has greater brightness and fluorescent quantum yield than the free fluorescent compound. The nanoparticle also exhibits high biostability and biocompatibility. To facilitate efficient urinary excretion of the nanoparticle, it may be coated with an organic polymer, such as poly(ethylene glycol) (PEG). The small size of the nanoparticle, the silica base and the organic polymer coating minimizes the toxicity of the nanoparticle when administered in vivo. In order to target a specific cell type, the nanoparticle may further be conjugated to a ligand, which is capable of binding to a cellular component associated with the specific cell type, such as a tumor marker. In one embodiment, a therapeutic agent may be attached to the nanoparticle. To permit the nanoparticle to be detectable by not only optical fluorescence imaging, but also other imaging techniques, such as positron emission tomography (PET), single photon emission computed tomography (SPECT), computerized tomography (CT), bioluminescence imaging, and magnetic resonance imaging (MRI), radionuclides / radiometals or paramagnetic ions may be conjugated to the nanoparticle.
Owner:SLOAN KETTERING INST FOR CANCER RES +1

System and method for medical imaging

The present disclosure provides a system and method for generating medical images. The method utilizes a novel algorithm to co-register Cone-Beam Computed Tomography (CBCT) volumes and additional imaging modalities, such as optical or RGB-D images.
Owner:THE JOHN HOPKINS UNIV SCHOOL OF MEDICINE

Generating three dimensional digital dention models from surface and volume scan data

A method and apparatus are disclosed enabling an orthodontist or a user to create an integrated three dimensional digital model of dentition and surrounding anatomy of an orthodontic patient from a three-dimensional digital model obtained using a scanner with a three-dimensional digital model obtained using a Cone Beam Computed Tomography (CBCT) or Magnetic Resonance Tomography (MRT) imaging devices. The digital data obtained from scanning as well as from CBCT imaging are downloaded into a computer workstation, and registered together in order to create a comprehensive 3-D model of the patient's teeth with roots, bones and soft tissues. The invention provides substantial improvement over the traditional two dimensional imaging modalities such as x-rays, photographs, cephalometric tracing for diagnosis and treatment planning
Owner:ORAMETRIX

Deep Learning Based Bone Removal in Computed Tomography Angiography

A method and apparatus for deep learning based automatic bone removal in medical images, such as computed tomography angiography (CTA) volumes, is disclosed. Bone structures are segmented in a 3D medical image of a patient by classifying voxels of the 3D medical image as bone or non-bone voxels using a deep neural network trained for bone segmentation. A 3D visualization of non-bone structures in the 3D medical image is generated by removing voxels classified as bone voxels from a 3D visualization of the 3D medical image.
Owner:SIEMENS HEALTHCARE GMBH

Motion tracking system for real time adaptive imaging and spectroscopy

Current MRI technologies require subjects to remain largely motionless for achieving high quality magnetic resonance (MR) scans, typically for 5-10 minutes at a time. However, lying absolutely still inside the tight MR imager (MRI) tunnel is a difficult task, especially for children, very sick patients, or the mentally ill. Even motion ranging less than 1 mm or 1 degree can corrupt a scan. This invention involves a system that adaptively compensates for subject motion in real-time. An object orientation marker, preferably a retro-grate reflector (RGR), is placed on a patients' head or other body organ of interest during MRI. The RGR makes it possible to measure the six degrees of freedom (x, y, and z-translations, and pitch, yaw, and roll), or “pose”, required to track the organ of interest. A camera-based tracking system observes the marker and continuously extracts its pose. The pose from the tracking system is sent to the MR scanner via an interface, allowing for continuous correction of scan planes and position in real-time. The RGR-based motion correction system has significant advantages over other approaches, including faster tracking speed, better stability, automatic calibration, lack of interference with the MR measurement process, improved ease of use, and long-term stability. RGR-based motion tracking can also be used to correct for motion from awake animals, or in conjunction with other in vivo imaging techniques, such as computer tomography, positron emission tomography (PET), etc.
Owner:UNIV OF HAWAII +3

Calibration of tissue densities in computerized tomography

A hybrid calibration method uses an calibration phantom (exterior reference) scanned simultaneously with the patient, and one or more known tissues of the subject (interior reference) to create a hybrid calibration reference that improves the measurement of tissue densities throughout the body. In addition, the calibration method is used to quantitatively define boundaries of tissue and organs for more accurate measurements of lengths, areas and volumes. Another aspect of the invention uses the calibrated images to quantitatively preset absolute window / levels for filming and image display, which provides standardized viewing for diagnostic purposes.
Owner:ARNOLD BEN A

Method, processor and computed tomography (CT) machine for generating images utilizing high and low sensitivity data collected from a flat panel detector having an extended dynamic range

A method, processor and computed tomography (CT) machine for generating images utilizing high and low sensitivity data collected from a flat panel detector having an extended dynamic range. Hardware modifications for extending the dynamic range include grouping pixel rows and pixel columns into clusters of two. The sensitivity of the rows / columns is modified by positioning optical masks that have different transparencies for different rows / columns. Software modifications for extending the dynamic range include taking two correlated exposure scan measurements at each angle and combining the two data sets into one scan prior to image reconstruction. This method uses a spatially varying pixel exposure method where several adjacent pixels are clustered and each cluster has a different sensitivity. The signals of these clusters are combined to form one image effectively producing an increased dynamic range. The flat panel imager may be an a-Si:H based flat panel detector for use in X-ray imaging, including cone beam computer tomography (CBCT).
Owner:RGT UNIV OF MICHIGAN

Front-side illuminated, back-side contact double-sided pn-junction photodiode arrays

The present invention is a photodiode detector array for use in computerized tomography (CT) and non-CT applications. Specifically, the present invention is a high-density photodiode arrays, with low dark current, low capacitance, high signal to noise ratio, high speed, and low crosstalk that can be fabricated on relatively large substrate wafers. More specifically the photodiode array of the present invention is fabricated such that the PN-junctions are located on both the front side and back side surfaces of the array, and wherein the front side PN-junction is in electrical communication with the back side PN-junction. Still more specifically, the present invention is a photodiode array having PN-junctions that are electrically connected from the front to back surfaces and which can be operated in a fully depleted mode at low reverse bias.
Owner:UDT SENSORS +1

Exact filtered back projection (FBP) algorithm for spiral computer tomography

Reconstructing images of objects spirally scanned with two-dimensional detectors with a novel algorithm. The image reconstruction process is proven to create an exact image of the object under the ideal circumstances. The algorithm has an FBP (Filtered Back Projection) structure and works very efficiently. The algorithm uses less computer power and combines the benefits of Exact Algorithms and Approximate algorithms.
Owner:UNIV OF CENT FLORIDA RES FOUND INC

Partical image velocimetry suitable for x-ray projection imaging

A 2D or 3D velocity field is reconstructed from a cross-correlation analysis of image pairs of a sample, without first reconstructing images of the sample spatial structure. The method can be implemented via computer tomographic x-ray particle image velocimetry, using multiple projection angles, with phase contrast images forming dynamic speckle patterns. Estimated cross-correlations may be generated via convolution of a measured autocorrelation function with a velocity probability density function, and the velocity coefficients iteratively optimised to minimise the error between the estimated cross-correlations and the measured cross-correlations. The method may be applied to measure blood flow, and the motion of tissue and organs such as heart and lungs.
Owner:4DX LTD

System and method for generating movie loop display from medical image data

A system and method for generating a sequential display of medical image data, such as magnetic resonance (MR) image data, computerized tomography (CT) image data, ultrasound image data, etc. are provided. The method includes the steps of acquiring a plurality of medical image data, each data including an image and associated header information; sorting each of the plurality of medical image data into a plurality of groups based on at least one common attribute identified in the associated header information; and sequentially displaying at least one group of images in a continuous movie loop. Additionally, the method provides for generating multiple images in a single movie loop allowing for comparison between data sets having different properties.
Owner:SIEMENS MEDICAL SOLUTIONS USA INC

Method And System For Multi-Energy Computer Tomographic Cuttings Analysis

A method and a system are provided to prepare a plurality of cuttings or other rock fragments or other porous media, such as cuttings from a drilling interval or multiple intervals, for computer tomographic scanning at the same time. A method and system also are provided to allow organization of mass quantities of cuttings or other rock fragments obtained from intervals of a well to more accurately categorize the cuttings to assist selections thereof for more detailed digital rock analysis, such as using SEM and FIB-SEM systems, are provided. A method and system also are provided to allow characterization of facies occurrence frequency of a depth interval using drill cuttings or other rock fragments. Computerized systems, computer readable media, and programs for performing the methods are also provided.
Owner:HALLIBURTON ENERGY SERVICES INC

Propagating Shell for Segmenting Objects with Fuzzy Boundaries, Automatic Volume Determination and Tumor Detection Using Computer Tomography

A dynamic thresholding level set method combines two optimization processes, i.e., a level set segmentation and an optimal threshold calculation in a local histogram, into one process that involves a structure called a “propagating shell.” The propagating shell is a mobile 3-dimensional shell structure with a thickness that encompasses the boundary of an object, the boundary between two objects or the boundary between an object and a background. Because the local optimal threshold tends to shift to a value of a small region in a histogram, the shift can drive the propagating shell to an object boundary by pushing or pulling the propagating shell. The segmentation process is an optimizing process to find a balanced histogram with minimal threshold shift. When the histogram in the propagating shell is balanced, the optimal threshold becomes stable, and the propagating shell reaches a convergence location, i.e., an object boundary. This method can be applied to computer-aided organ and tumor volumetrics.
Owner:THE GENERAL HOSPITAL CORP

Method and apparatus for a medical image processing system

Disclosed is a medical image processing system comprising a medical image storage server for storing digital image data provided by means such as computerized tomography or magnetic resonance image apparatus in a medical image database; and an image processing system which is coupled to said medical image storage server and to several client computers by TCP / IP protocol; wherein said image processing system comprises a user interface unit which converts the user's command into an electric signal and outputs said electric signal; an image processor unit which reads a medical image out of said medical image database, performs an image processing program comprising a medical image controlling algorithm and outputs a result signal; and an output interface unit which receives said result signal and converts said result signal into a format which can be recognized by a user.
Owner:VIRTUAL ITECH

Time resolved computed tomography angiography

A contrast enhanced dynamic study of a subject is performed with a CT system. A series of undersampled image data sets are acquired during the study with successive data sets acquired at interleaved projection angles. More fully sampled image data sets are formed by transforming the x-ray attenuation projection data to k-space and then sharing peripheral k-space data between undersampled k-space data sets. Artifacts due to undersampling are thus reduced without significantly affecting the time resolution of a series of reconstructed images.
Owner:WISCONSIN ALUMNI RES FOUND
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