Patent application number | Description | Published |
20080304731 | Data processing apparatus, medical diagnostic apparatus, data processing method and medical diagnostic method - A data processing apparatus includes a SNR distribution data generating unit, a filter processing unit, a weighting function generating unit and a corrected data generating unit. The SNR distribution data generating unit generates SNR distribution data of processing target data based on the processing target data. The filter processing unit generates filter processed data obtained by performing filter processing to the processing target data to improve a SNR of the processing target data. The weighting function generating unit generates a weighting function based on the SNR distribution data. The corrected data generating unit generates corrected data by performing weighted calculation between the processing target data and the filter processed data using the weighting function. | 12-11-2008 |
20090076374 | Magnetic resonance imaging apparatus - A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data. | 03-19-2009 |
20100013475 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires plural pieces of magnetic resonance data for generating plural species of image data of which contrasts are mutually different from a same object with mutually different data amounts by setting parameters for controlling the contrasts to mutually different values. The image data generating unit generates the plural species of the image data by image reconstruction processing and composition processing of the plural pieces of the magnetic resonance data or plural pieces of data derived from the plural pieces of the magnetic resonance data. | 01-21-2010 |
20100022869 | MAGNETIC RESONANCE IMAGING APPARATUS - A apparatus includes a unit which detects a magnetization vector for each of pixel positions in an imaging region including at least part of a subject, the magnetization vector being excited to have a phase difference between a flow portion and a static portion or between a normal portion and an abnormal portion, a decision unit which decides a pixel value of each pixel position as a value proportional to an absolute value of the amplitude of the magnetization vector detected for each of the pixel positions, and a unit which corrects, on the basis of a real part or phase of the magnetization vector detected for each of the pixel positions, the pixel value decided by the decision unit so that the difference of the pixel value increases between the flow portion or the abnormal portion and the static portion or the normal portion. | 01-28-2010 |
20100081918 | MAGNETIC RESONANCE DIAGNOSTIC APPARATUS AND MAGNETIC RESONANCE DIAGNOSTIC METHOD - A magnetic resonance diagnostic apparatus includes a derivation unit to derive an apparent diffusion coefficient regarding a pixel position for each pixel position included in a region of interest in at least two original images obtained by imaging a same imaging region of a same subject using at least two b-factors which are different from each other, respectively, based on pixel values of each of at least two original images regarding the pixel positions, and a first estimation unit to estimate a pixel value obtained by using a b-factor which is different from the at least two b-factors, regarding each pixel position included in the region of interest, based on the apparent diffusion coefficient derived for each pixel position. | 04-01-2010 |
20100253342 | MAGNETIC RESONANCE IMAGING APPARATUS - An apparatus includes a unit which acquires, by a first sequence, an MR signal before administration of a contrast agent and which also acquires, by a second sequence, an MR signal after the administration, the first sequence dephasing a magnetization after RE excitation to make a greater signal reduction in a first signal component regarding a fluid flowing within a first range than in a second signal component regarding the fluid flowing within a second less than the first range, the second sequence bringing the MR signal after the administration to a level corresponding to the concentration of the agent, a unit which reconstructs first and second images, and a unit which generates a third image on the basis of the first and second images, the third image showing the degree of a change of the fluid after the administration from a state before the administration. | 10-07-2010 |
20100259264 | DATA PROCESSING SYSTEM, DATA PROCESSING METHOD, DIAGNOSTIC IMAGING APPARATUS, AND MAGNETIC RESONANCE IMAGING APPARATUS - A data processing system configured to process acquired image data (e.g., as part of a diagnostic imaging apparatus) uses a signal-power estimating unit for estimating signal power by using reference data containing data different from processing-target data and a data processing unit for processing the processing-target data by using a WF (wiener_filter) based on the signal power estimated by the signal-power estimating unit. | 10-14-2010 |
20110037466 | Magnetic resonance imaging apparatus and magnetic resonance imaging method - A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time. | 02-17-2011 |
20110043206 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL UNIT - According to one embodiment, a magnetic resonance imaging apparatus includes a correction data acquisition unit configured to perform diffusion weighted imaging to a phantom having a known apparent diffusion coefficient and measure an apparent diffusion coefficient of the phantom to acquire correction data from a measured apparent diffusion coefficient and the known apparent diffusion coefficient, and an image generating unit configured to perform diffusion weighted imaging to an object with a same parameter setting as that of the diffusion weighted imaging to the phantom to generate an apparent diffusion coefficient image from a diffusion weighted imaging data of the object and the correction data. | 02-24-2011 |
20110071384 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes an acquisition unit that acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit that generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data. | 03-24-2011 |
20110074417 | MAGNETIC RESONANCE IMAGING APPARATUS AND CONTROL METHOD THEREOF - To provide a magnetic resonance imaging apparatus capable of acquiring a non-contrast MRA image in which a background signal is sufficiently suppressed in a shorter time. A magnetic resonance imaging apparatus has: a data acquiring unit that acquires a plurality of pieces of magnetic resonance data associated with a plurality of different delay times according to a pulse sequence in which a region-selective saturation pulse is first applied, a region-non-selective inversion recovery pulse is then applied, and then the magnetic resonance data is acquired, the delay time being defined as a period from a time of application of the saturation pulse to a time of start of acquisition of the magnetic resonance data; and a blood flow image creating unit that creates a plurality of pieces of blood flow image data associated with the plurality of different delay times using the magnetic resonance data. | 03-31-2011 |
20110199082 | MAGNETIC RESONANCE IMAGING APPARATUS - Provided is an MRI apparatus. In the MRI apparatus, a data collection unit repetitively performs a tag mode of applying an RF wave to at least an upstream portion of an imaging area to perform fluid labeling of a fluid flown into the imaging area and, after a lapse of an inversion time from application of the RF wave, performing magnetic resonance data collection, while changing the inversion time. An image reconstruction unit reconstructs a plurality of tag images corresponding to a plurality of different inversion times based on the magnetic resonance data collected in the tag mode. A reference image generation unit generates a reference image based on the plurality of the tag images. A fluid image generation unit generates a subtraction image between each of the tag images and the reference image as a fluid image. | 08-18-2011 |
20120074940 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - According to one embodiment, a magnetic resonance imaging apparatus includes an imaging unit and data processing condition setting unit. The imaging unit is configured to acquire magnetic resonance data corresponding to a sampling region asymmetric in a wave number direction in k-space from an object to generate image data based on the magnetic resonance data by data processing including phase correction and filter processing for obtaining a complex conjugate. The data processing condition setting unit is configured to set a condition for the data processing according to an imaging condition influencing a phase distribution used for the phase correction or the phase distribution. | 03-29-2012 |
20120148137 | MAGNETIC RESONANCE IMAGING AND CORRECTING DEVICE - An image data correcting device has a movement information acquiring section, a correcting section and a synthesizing section. The movement information acquiring section acquires movement information showing spatial distribution of the magnitude of a movement in the real space of an image pickup part of a detected body. The correcting section makes a correction different from that of a second area in a first area of image data collected by a scan of magnetic resonance imaging on the basis of the movement information. The synthesizing section synthesizes respective image data of the first area and the second area corrected by the correcting section. | 06-14-2012 |
20140035583 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetization vector is detected for each pixel position in an imaging region including at least part of a subject, the magnetization vector being excited to have a phase difference between a flow portion and a static portion or between a normal portion and an abnormal portion. A pixel value at each pixel position is determined as a value proportional to an absolute value of the amplitude of the magnetization vector detected for each of the pixel positions. On the basis of a real part or phase of the magnetization vector detected for each of the pixel positions, the determined pixel value is corrected so that the difference of the pixel value increases between (a) the flow portion or the abnormal portion and (b) the static portion or the normal portion. | 02-06-2014 |
20140212017 | MRI DIFFUSION WEIGHTED IMAGING WITH ESTIMATED MOTION PROBING GRADIENT b-FACTORS BASED ON ACQUIRED APPARENT DIFFUSION COEFFICIENTS FOR EACH PIXEL - A magnetic resonance diagnostic apparatus includes a derivation unit to derive an apparent diffusion coefficient regarding a pixel position for each pixel position included in a region of interest in at least two original images obtained by imaging a same imaging region of a same subject using at least two b-factors that are different from each other, respectively, based on pixel values of each of at least two original images regarding the pixel positions, and a first estimation unit to estimate a pixel value obtained by using a b-factor that is different from the at least two b-factors, regarding each pixel position included in the region of interest, based on the apparent diffusion coefficient derived for each pixel position. | 07-31-2014 |