|| List of recent Tomograph-related patents
|Computed tomography calibration systems and methods|
According to certain embodiments of the invention, computer hardware and software can perform single or dual-energy decomposition calculations and predict ct values for either single-energy or dual energy ct from basis material decomposition estimates derived using theoretical models. Using that information, the computer hardware and software can (among other things) present one dimensional information from a ct scanner, such as representative pixel value, in two dimensions, such as a line in two dimensional basis material space..
|Near-infrared super-continuum lasers for early detection of breast and other cancers|
A system and method for using near-infrared or short-wave infrared (swir) light sources for early detection and monitoring of breast cancer, as well as other kinds of cancers may detect decreases in lipid content and increases in collagen content, possibly with a shift in the collagen peak wavelengths and changes in spectral features associated with hemoglobin and water content as well. Wavelength ranges between 1000-1400 nm and 1600-1800 nm may permit relatively high penetration depths because they fall within local minima of water absorption, scattering loss decreases with increasing wavelength, and they have characteristic signatures corresponding to overtone and combination bands from chemical bonds of interest, such as hydrocarbons.
|Interfacing systems, devices, and methods for optical imaging|
An imaging interface for diffuse optical tomography of breast includes a plurality of concentric rings. Each concentric ring can include a plurality of optical input/output apertures arranged on a radially inner surface thereof.
|Methods and systems for imaging tissue motion using optical coherence tomography|
A system and method for measuring tissue motion within a living tissue of the anterior segment and aqueous outflow system of the eye in a subject are provided. Tissue movements are extracted from a plurality of images acquired from the living tissue using an optical coherence tomography system.
|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..
|Diagnostic method and treatment|
Methods for detecting early stage fungal infection (and especially esca or esca-like infections) in woody plants are disclosed, using x-ray tomographic imaging. In preferred embodiments, axial x-ray tomography is employed, with radiodense regions of the tomograms indicating the location of such infection.
|Methods for analyzing absorbent articles|
A method for analyzing an absorbent article may include providing a three-dimensional computed tomography data set comprising a mannequin image and an article image. The article image may be constructed from projections collected while the absorbent article is fitted to a mannequin.
|Ophthalmologic image display apparatus, ophthalmologic image display method, program, and storage medium|
An ophthalmologic image display apparatus for displaying information about an eye includes an input unit configured to input a tomographic image of the eye, an acquisition unit configured to acquire diagnostic supporting information associated with positional information about the tomographic image of the eye, a processing unit configured to perform processing for assigning a voxel value to volume data constituting the tomographic image based on a reflection intensity value indicating the tomographic image and the diagnostic supporting information, and a display control unit configured to cause a display unit to display an image processed by the processing unit.. .
|Apparatus and method for angular response calibration of photon-counting detectors in sparse spectral computed tomography imaging|
A method for detector angular response calibration in computed-tomography (ct) comprising capturing incident x-ray photons, emitted from an x-ray source, via a plurality of energy-discriminating detectors, determining photon counts of the captured incident x-ray photons in a plurality of energy windows at each energy-discriminating detector, and adjusting the photon counts based on a pre-determined detector angular response calibration look-up table for a given view for each energy-discriminating detector at each energy window.. .
|Apparatus and method for count loss calibration of photon-counting detectors in spectral computed tomography imaging|
A method for photon count-loss calibration in a computed-tomography (ct) scanner, including capturing incident x-ray photons via a plurality of energy-discriminating detectors, determining photon counts of the captured incident x-ray photons in a plurality of energy windows at each energy-discriminating detector, and adjusting the determined photon counts in each energy window for each energy-discriminating detector based on a pre-determined photon count-loss look-up table and the determined photon counts.. .
|Multi energy x-ray microscope data acquisition and image reconstruction system and method|
A multi energy, such as dual-energy (“de”), x-ray imaging system data acquisition and image reconstruction system and method enables optimizing the image contrast of a sample. Using the de x-ray imaging system and its associated user interface applications, an operator performs a low energy (“le”) and high energy (“he”) x-ray scan of the same volume of interest of the sample.
|Computed tomography imaging process and system|
A computed tomography imaging process, including: acquiring projection images of an object by detecting radiation that has passed through the object for respective different relative orientations of the object and the radiation; and processing the projection images to generate a tomogram of the object; wherein the radiation passes through the object in the form of a diverging beam, and the different acquire set of projection images for a relative orientations of the object and the beam of radiation define two or more complete trajectories of the beam along the object, the complete trajectories being mutually offset to reduce the degradation of spatial resolution in portions of the generated tomogram due to the divergence of the beam through the object.. .
|Computerized movable laser system for radiographic patient positioning|
A system for radiographic patient positioning includes at least one laser. An orientation sensor is associated with a laser and the orientation sensor produces tilt data indicative of an orientation of a laser.
|Broadband or mid-infrared fiber light sources|
An optical system for use in an imaging procedure includes one or more semiconductor diodes configured to generate an input signal beam with a wavelength shorter than 2.5 microns that is amplified and communicated through optical fiber(s) to a nonlinear element configured to broaden the spectral width to at least 50 nm through a nonlinear effect. A subsystem includes lenses or mirrors to deliver an output beam having a broadened spectrum to an optical coherence tomography apparatus with a sample and reference arm to perform imaging for characterizing the sample.
|Modelling of tof-doi detector arrays|
The invention is directed to several crystal arrangements for time-of-flight (tof) positron emission tomography (pet) with depth of interaction (doi) encoding for high spatial, energy and timing resolution. Additionally, several implementations of the tof-doi pet detector arrays are proposed with related measurements which all show that no timing degradation is visible in the used setup for first photon trigger for digital silicon photo multipliers (dsipms)..
|Supplemental transmission information for attenuation correction in positron emission tomography imaging|
Supplemental transmission information is used in pet imaging with a hybrid pet/mr system. The magnetic field of the mr portion is used to direct positrons from one or more sources outside or inside the pet field of view to within the pet field of view.
|Method and device for correction of movement artifacts in a computed tomography image|
A method for correction of movement artifacts in a computed tomography image that is reconstructed from a plurality of computed tomography projection images is provided. Using all projection images of the plurality of computed tomography projection images, an average position of an examination area of an examination object in the reconstructed image volume is determined by a global optimization method.
|Method for simulating thoracic 4dct|
Four-dimensional (4d) computed tomography (ct) is simulated by first generating a surface mesh from a single thoracic ct scan. Tetrahedralization is applied to the surface mesh to obtain a first volume mesh.
|Large field of view grating interferometers for x-ray phase contrast imaging and ct at high energy|
A device and method of the present disclosure provides large field-of-view talbot-lau phase contrast ct systems up to very high x-ray energy. The device includes microperiodic gratings tilted at glancing incidence and tiled on a single substrate to provide the large field-of-view phase contrast ct system.
|Low impedance interface circuit to maximize bandwidth and provide bias control|
A multichannel application specific integrated circuit (asic) for interfacing with an array of photodetectors in a positron emission tomography (pet) imaging system includes a front end circuit configured to be coupled to the photodetectors and to receive discrete analog signals therefrom. The asic further includes a time discriminating circuit operably coupled to the front end circuit and configured to generate a hit signal based on a combination of the discrete analog signals, and an energy discriminating circuit operably coupled to the front end circuit and configured to generate a summed energy output signal based on each of the discrete analog signals and summed row and column output signals based on each of the discrete analog signals.
|Electric impedance tomography device and method|
An electric impedance tomography device with chest electrodes, a display and a control and analyzing unit to determine a time series of a global ventilation curve from the sequence of reconstructed matrices as a time series of the mean impedance change or of a measured respiration volume, to divide an inspiration or expiration phase into a number of steps of equal volume change, to determine the times corresponding to these steps, to determine the change in local impedance between these times for each image element, the ratio of this local change in impedance to the global equal volume change to form a local sequence of relative impedance changes of the image element as a function of the steps of equal volume change, to determine a scalar indicator characteristic as a function of the steps of equal volume change and to display each image element based on the respective scalar indicator.. .
|Electric impedance tomography device and method|
An eit device with a plurality of electrodes, which can be arranged about the chest of a patient, with a control and analyzing unit for feeding electrode pairs of a set of electrodes to record a voltage or current signal as a measured signal with electrode pairs acting consecutively as the feeding electrode pair to provide a matrix of image elements. A time series of the impedance change from the sequence of reconstructed matrices over at least one breath is obtained and compared to a determined time series of the mean impedance change or a time series of a measured respiration volume, by calculating for each image element a scalar value as an indicator of a deviation.
|Enhanced optical angiography using intensity contrast and phase contrast imaging methods|
The methods described herein are methods to ascertain motion contrast within optical coherence tomography data based upon intensity. The methods of the invention use logarithm operation to convert the multiplicative amplitude or intensity fluctuations (speckle) into the additive variations and recovers the motion contrasts by removing the speckle free signals (static regions) through statistical analysis..
|Optical coherence tomography probe|
A miniature intraoperative probe (30) capable of forward-imaging with optical coherence tomography. The probe includes a housing (130), an actuator (150) supported by the housing, and a single mode (146) fiber supported by the housing and configured to laterally scan light data reflected from a sample..
|Instrument depth tracking for oct-guided procedures|
Systems and methods are provided for tracking a depth of a surgical instrument in an optical coherence tomography (oct) guided surgical procedure. An oct device is configured to image a region of interest to provide oct data.
|Method for generating attenuation correction for a combined magnetic resonance-positron emission tomography device|
A method, a computer program product and a computer readable storage medium are disclosed for generating a global attenuation map used for attenuation correction of positron emission tomography image data sets in a combined magnetic resonance-positron emission tomography device. In an embodiment, during the course of detecting hardware components of the combined magnetic resonance-positron emission tomography device and determining positions of the detected hardware components relative to a patient support, the global attenuation map is generated as a function of the detected hardware components..
|Magnetic resonance imaging and positron emission tomography system|
Provided is a magnetic resonance imaging and positron emission tomography (mri-pet) system. The mri-pet system includes a pet unit and a radiofrequency (rf) coil disposed within a gradient coil assembly..
|Handheld device and method for tomographic optoacoustic imaging of an object|
In order to facilitate an acquisition of high-quality tomographic optoacoustic images from different depths within the object at a simple overall design, the handheld device may be provided with a recess, in which the irradiation unit and the array of detector elements are provided, wherein the detector elements are arranged in the recess such that the surface normals of at least a part of the detector elements are directed to a region of interest on or within the object.. .
|Electric impedance tomography device and method|
An eit device with a plurality of electrodes, which can be arranged about the chest of a patient, with a control and analyzing unit for feeding electrode pairs of a set of electrodes to record a voltage or current signal as a measured signal with electrode pairs acting consecutively as the feeding electrode pair to provide a matrix of image elements. A time series of the impedance change from the sequence of reconstructed matrices over at least one inspiration and one expiration is obtained and compared to a determined time series of the mean impedance change or a time series of a measured respiration volume, by calculating for each image element a scalar value as an indicator of a deviation.
|Interactive live segmentation with automatic selection of optimal tomography slice|
An apparatus for automatic selection of optimal tomography slices by executing a number of tentative segmentations using the same interactively provided in-slice seed point on some or all available tomography slices. The appropriate segmentation boundaries are then marked and the slice with the best segmentation goodness value (figure of merit) is presented to the user via a viewer.
|Filter for tomographic reconstructions|
A method for applying a filter component for an analytical tomographic reconstruction technique, e.g. Filtered backprojection, used in tomographic comprises providing an algebraic reconstruction algorithm for reconstructing a spatial representation of a volume of interest from a projection data set.
|X-ray computed tomography apparatus, medical image processing apparatus, and medical image processing method|
An x-ray computed tomography apparatus includes an x-ray tube, an x-ray detector, a volume data reconstruction unit, a lung field region specifying unit, a discrimination unit, an image generation unit, and a display unit. The volume data reconstruction unit reconstructs first volume data of a chest region of an object based on an output from the x-ray detector.
|Adjustable photon detection systems for multi-slice x-ray computed tomography systems|
An adjustable photon detection system (apds) for multi-slice x-ray ct systems and a multi-slice x-ray ct system using the apds are disclosed; wherein the apds can be adjusted to be aligned to different x-ray source positions; wherein the multi-slice x-ray ct system comprises one or more x-ray sources, and one or more apds; wherein the multi-slice x-ray ct system may also include a detector position calculator for calculating effective detector positions and a detector position corrector for correcting projection data using calculated effective detector positions.. .