|| List of recent Tomography-related patents
|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..
|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.
|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.. .
|Detector circuits for interferometers|
A detector circuit for a multi-channel interferometer, typically as may be used in an optical coherence tomography device, comprising: a plurality of measurement channels (43) each comprising a measurement detector (31); and a balance channel (44) comprising a balance detector (30), each of the measurement detectors (31) and the balance detector (30) having a light sensitive area and an electrical output configured to output a signal indicative of the intensity of light incident on the light sensitive area, in which each measurement channel (43) is provided with a feedback circuit (40) comprising: a variable gain circuit (35) having an input for the signal from the measurement detector (31) and an output, the variable gain circuit (35) being configured to output at its output the signal received at its input with a variable level of gain; a difference circuit (38) having a first input for the output of the variable gain circuit (35), a second input for the signal from the balance detector (30) and an output, and being configured to output at its output a signal indicative of a difference of the signals at its first and second inputs; and a controller (36) for each variable gain circuit (35) configured to vary the variable level of gain dependent upon a low frequency component of the output of the difference circuit (38).. .
|Systems, method and computer-accessible medium which utilize synthetic aperture(s) for extending depth-of-focus of optical coherence tomography imaging|
An exemplary apparatus can be provided for generating at least one image of a structure. The apparatus can include at least one first arrangement that has a structural configuration with a first aperture and a second aperture.
|Optical coherence tomography control systems and methods|
In part, the invention relates to methods, devices, and systems suitable for controlling a light source. The light source is configured for use in a data collection system such as an optical coherence tomography system.
|Oct swept laser with cavity length compensation|
An optical coherence tomography system utilizes an optical swept laser that has cavity length compensator that changes an optical length of the laser cavity for different optical frequencies to increase the length of the laser cavity for lower optical frequencies. Specifically, a spectral separation between longitudinal cavity modes of the laser cavity is shortened or alternatively lengthened as a passband of a cavity tuning element sweeps through a scanband of the swept optical signal.
|Method and system for optical coherence tomography|
To facilitate a reliable and time-saving examination with straightforward handling, provision is made that a second plane of the object (1) is selected on the basis of the first image (60) that is displayed on the display device (52), wherein the second plane of the object (1) is different from the first plane of the object (1), and a second image (61) is acquired in the region of the selected second plane of the object (1) by means of the optical coherence tomography equipment.. .
|Attenuation-based optic neuropathy detection with three-dimensional optical coherence tomography|
Optical coherence tomography (oct) scan data of a subject is acquired over a region of interest which can include an optic disc or a macula of a retina. Layer boundaries of retinal layers are identified in the oct scan data to facilitate measurements.
|Automated detection of uveitis using optical coherence tomography|
Systems and methods for automatically detecting, classifying and quantifying clumps indicative of inflammation in the eye using optical coherence tomography images are described. Clump detection relies on both intensity and geometric thresholding.
|Method for using lso background radiation as a transmission source using time of flight information|
A method for using lutetium-based scintillator crystals' background beta decay emission in a positron emission tomography (pet) scanner as a transmission scan source for generating attenuation maps is disclosed.. .
|Combined reflectance confocal microscopy-optical coherence tomography system for imaging of biological tissue|
A dual-modality apparatus for imaging of biological tissue includes a reflectance confocal microscopy (rcm) imaging apparatus and an optical coherence tomography (oct) imaging apparatus. A first optical component reflects a first beam of light provided by a rcm imaging apparatus towards a sample and passes a second beam of light provided by an oct imaging apparatus towards the sample, such that the first and second beam of lights share at least a portion of an imaging path..
|Method for quantitative prediction of matrix acidizing treatment outcomes|
In one embodiment, the current application discloses a method comprising: performing a computed tomography (ct) porosity scan on a core sample, the core sample comprising a portion of a formation of interest; in response to the ct porosity scan, interpreting a porosity profile of the core sample; and in response to the porosity profile, modeling a response of a formation of interest to a predetermined treatment to determine a reacted formation configuration, wherein the predetermined treatment comprises an acid fluid treatment schedule, and wherein the modeling further comprises modeling acid fluid flow through the formation of interest having the porosity profile, and wherein the modeling further comprises accounting for acid reaction products during the predetermined treatment and shut-in period.. .
|Computerized tomography (ct) method and ct system|
A computerized tomography (ct) method and ct system. The method comprises projecting a beam from a radiation source within a display field of view (dfov) toward a subject to be imaged; receiving, at a detector, the projected beam to collect projection data; determining whether in the projection a truncation occurs in which the subject exceeds the dfov; and recording a truncated location of the projection if truncation occurs..
|Photon counting type x-ray computed tomography apparatus and data transfer method for the same|
A photon counting type x-ray computed tomography apparatus includes an x-ray tube, a detector, a raw data generating section, an information compression section, and a data transmission section. The x-ray tube is configured to irradiate an x-ray.
|Real-time resampling of optical coherence tomography signals using a field programmable gate array|
A signal processing system implemented on a field programmable gate array (fpga) operates according to a low frequency k-clock to sample optical coherence topography (oct) signals, as opposed to relying on a high frequency k-clock to obtain the same information. A resampler is used to resample the oct signal uniformly in the optical frequency domain.
|Pet/mr scanners for simultaneous pet and mr imaging|
In a combined system, a magnetic resonance (mr) scanner includes a magnet configured to generate a static magnetic field at least in a mr examination region from which mr data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (pet) examination region.
|Method and apparatus for implementing a positron emission tomography|
A method is disclosed for implementing a positron emission tomography of an examination object. In an embodiment of the method, after introducing a pet tracer into the examination object, the method includes implementing at least one functional magnetic resonance tomography for determining at least one respective measure of the activation of at least one respective brain area; implementing positron emission tomography; and adjusting a result of the positron emission tomography as a function of the at least one respective measure of the activation of at least one respective brain area.
|Fast iterative image reconstruction method for 3d computed tomography|
This invention relates to a high resolution and low dosage tomographic imaging in three dimensions, and more particularly, to a fully analytical fast iterative statistical algorithm for image reconstruction from projections obtained in a spiral cone-beam x-ray scanner is described. The presented method allows to improve the resolution of the reconstructed images and/or to decrease the x-ray intensity while maintaining the quality of the obtained ct images, because the signals obtained are adapted to the specific statistics for this imaging technique.
|Ophthalmic analysis apparatus and ophthalmic analysis program|
There is provided an ophthalmic analysis apparatus configured to acquire an analysis result of a tomographic image of a subject eye which is acquired by using optical coherence tomography (oct), and to output the analysis result. The apparatus functions as a display control unit configured to control a display unit to display a two-dimensional image based on an oct tomographic image; an analysis region setting unit configured to set multiple analysis regions on the two-dimensional image displayed on the display unit by the display control unit; and an output control unit configured to acquire an analysis result in the multiple analysis regions set by the analysis region setting unit and to output the acquired analysis result..
|Radiographic apparatus and an image processing method therefore|
Initial values â1p̂1m̂1 . .
|Method and system for optical coherence tomography|
To facilitate a reliable and time-saving examination of the object (1), with the most straightforward handling possible, the first image (60) is acquired in the region of the first plane (s) of the object (1) and the second image (61) is acquired in the region of the second plane (f) of the object (1) in real time, and the first image (60) or the second image (61) is rendered as a real time image and the respectively other image, i.e. The second or the first image (61 or 60 respectively), is rendered as a still image on the display device (52) depending on a control command, in particular one entered by an operator..
|Ophthalmic imaging apparatus|
There is provided an ophthalmic imaging apparatus including an optical coherence tomography (oct) optical system for acquiring a tomographic image of a subject eye, an observation optical system configured to acquire a front image of the subject eye. The apparatus functions as an image generation unit which repeatedly generates the tomographic image based on an output signal from the oct optical system, and repeatedly generates the front image based on an output signal from the observation optical system, a determination unit which detects a positional deviation between a reference front image and each of front images generated by the image generation unit, and determines consecutiveness of the front images whose positional deviation satisfies a permissible range, and a selection process unit which selects one of multiple tomographic images generated by the image generation unit, based on a determination result by the determination unit..
|Normalization coefficients in pet continuous bed motion acquisition|
Normalization coefficients in are computed for positron emission tomography (pet) continuous bed motion acquisition (cbm). The normalization coefficients for the lines-of-response in cbm account for the change in decay of the injected isotope over time and/or changes in velocity of the bed motion..
|Seismic data processing|
Described herein are implementations of various technologies for a method for processing seismic data corresponding to a region of interest. The method may receive the seismic data.
|Dip tomography for estimating depth velocity models by inverting pre-stack dip information present in migrated/un-migrated pre-/post-stack seismic data|
Methods and systems for dip constrained non-linear tomography in seismic data. An additional term, comprising the dip associated with the kinematic migration of locally coherent events, is introduced into the cost function.
|Vibrational photoacoustic tomography using raman laser|
A method of noninvasively imaging tissue within a body includes irradiating the tissue using an imaging laser including a raman-based laser tuner, the radiation including a plurality of laser pulses, each having energy greater than 100 mj; receiving an acoustic signal generated by vibrational energy in the tissue, wherein the vibrational energy is a result of selective overtone excitation of molecules in the tissue by the radiation; and automatically converting the acoustic signal to an image representative of the tissue using a processor. An imaging system includes an imaging laser configured to irradiate tissue with a plurality of laser pulses using a raman-based laser tuner.
|Topogram from a spiral reconstruction|
A computed tomography system is disclosed, along with a method and computer program product. An embodiment uses such a spiral acquisition to reconstruct a spatial three-dimensional image of the examination region.
|Excised specimen imaging using a combined pet and micro ct scanner|
Embodiments of the present invention provide methods and apparatus for imaging a tissue specimen excised during surgery with a combined positron emission tomography (pet) and micro computed tomography (micro ct) scanner. The specimen is scanned with a ct imaging system of the combined pet and micro ct scanner.
|Balanced-detection spectra domain optical coherence tomography system|
A balanced-detection spectra domain optical coherence tomography system is disclosed. A light beam l emitting from the light source module is passed through the second beam splitter, the first beam splitter in series, and then split to the mirror and the sample respectively, and further simultaneously reflected to the first beam splitter, a light beam l1 and a light beam l2 are refracted by the first beam splitter and the second beam splitter respectively, and then transmitted to the first collimator and the second collimator respectively, and a phase difference between the light beam l1 and the light beam l2 is 180°.
|Multiple timing measurements for positron emission tomography|
Timing is determined in positron emission tomography (pet). Two or more different types of timing detection are used for each event.
|Method for focused acoustic computed tomography (fact)|
A method for acoustic tomography within a patient may include generating a focused ultrasonic signal using a transducer is provided; the ultrasonic signal forming a path within the patient. The method includes directing the ultrasonic signal on a spot within the patient; scanning the spot in a predetermined pattern about a volume within the patient; receiving an ultrasonic echo in the transducer; converting the ultrasonic echo into a voltage; selecting a frequency band from the voltage; amplifying the voltage in the selected frequency band with a processing circuit; and generating an image of the volume within the patient structure utilizing the amplified voltage.
|18f-labeled precursor of pet radioactive medical supplies, and preparation method thereof|
The present invention relates to a precursor of positron emission tomography (pet) radioactive medical supplies, a preparation method thereof, and an application thereof, and more specifically, to a precursor having a tetravalent organic salt leaving group, a preparation method, and a method for preparing desired pet radioactive medical supplies in a high radiochemical yield within a short preparation time by introducing 18f using the same through a single step. The precursor having a tetravalent organic salt leaving group of the present invention can simplify the known complex multistep preparation of radioactive medical supplies into a single step, can save production costs because an excessive amount of a phase transfer catalyst is not required, facilitates separation of a compound after reaction, and enables rapid reaction velocity.
|Compounds for use in imaging, diagnosing and/or treatment of diseases of the central nervous system|
This invention relates to novel compounds suitable for labelling by 18f and the corresponding 18f labelled compounds themselves, 19f-fluorinated analogues thereof and their use as reference standards, methods of preparing such compounds, compositions comprising such compounds, kits comprising such compounds or compositions and uses of such compounds, compositions or kits for diagnostic imaging by positron emission tomography (pet).. .
|Modulating gantry rotation speed and image acquisition in respiratory correlated (4d) cone beam ct images|
A method of optimizing 4d cone beam computed tomography (4dcbct) imaging is provided that includes using a scanner to generate projections of a target, where the projections are used to form a cone beam computed tomography (cbct) scan of the target, where the cbct includes a 3d image of the target, and using an appropriately programmed computer to control rotation speed of a gantry and projection acquisition of the cbct in real-time according to a measured patient respiratory signal, where the real-time acquisition of the cbct forms an optimized 4dcbct image set.. .
|Computed tomography system with dynamic bowtie filter|
A ct apparatus for scanning an object is provided. An x-ray source is provided, wherein the x-ray source provides a collimated x-ray beam with a cross-section with a length and thickness.
|Spectral domain optical coherence tomography system|
An optical coherence tomography device is disclosed for improved imaging. Reduced levels of speckle in the images generated by the device are obtained by forming a b-scan from a plurality of a-scans, wherein each resolution cell of the b-scan is generated through compounding of a subset of the a-scans and wherein at least some of the subset of a-scans are separated by at least half the diameter of a speckle cell both tangent to and orthogonal to the b-scan at that cell..