Data correction apparatus, data correction method, magnetic resonance imaging apparatus and X-ray CT apparatus
A data correction and data technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of image quality deterioration, image quality or measurement result deterioration, SNR spatial non-uniformity, etc., to maintain spatial uniformity. The effect of sex, uniform data
Active Publication Date: 2010-02-24
TOSHIBA MEDICAL SYST CORP
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[0008] However, in MR imaging using multiple surface coils as described above and MR imaging using a single surface coil, when correcting the sensitivity distribution of the surface coils, there is a problem that spatial non-uniformity occurs in the SNR
As a result, the SNR becomes spatially non-uniform, which leads to the deterioration of the image quality, so the spatial non-uniformity of the SNR is undesirable in diagnosis
[0010] Also, in medical devices such as other image diagnostic devices or biological information measuring instruments other than MRI devices using surface coils as sensors, if the intensity of a signal obtained when collecting the spatially non-uniform sensitivity distribution of the sensor is set to be constant , then spatial non-uniformities appear in the SNR as well as noise, which can lead to deterioration of image quality or measurement results
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[0047] A data correction device, a data correction method, a magnetic resonance imaging device, and an X-ray CT device according to embodiments of the present invention will now be described with reference to the accompanying drawings.
[0048] figure 1 is a functional block diagram showing the data correction device according to the first embodiment of the present invention.
[0049] The data correction device 1 is constituted by a computer that reads a program. It should be noted that the whole or part of the data correction device 1 may be constituted by circuits. The data correction device 1 includes a sensitivity correction unit 2 , an SNR distribution acquisition unit 3 , a filter unit 4 and a weighted addition unit 5 . Therefore, these units correct the data by performing correction processing of the spatially non-uniform sensitivity distribution of the sensor while maintaining the spatial uniformity of the SNR distribution on data acquired by medical devices such as ...
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A data correction apparatus includes a sensitivity correction unit and an SNR distribution correcting unit. The sensitivity correction unit produces first processed data by performing sensitivity correction to first objective data obtained based on correction objective data using ununiform sensitivity distribution of a sensor for acquiring the correction objective data. The SNR distribution correcting unit produces pieces of component data each subjected to corresponding weighting depending on an SNR distribution and corresponding filtering having a mutually different intensity using second objective data obtained based on the correction objective data to produce second processed data by compounding the pieces of the component data.
Description
technical field [0001] The present invention relates to a data correction device, a data correction method, a magnetic resonance imaging device and an X-ray CT (computed tomography) device which exhibit spatially inhomogeneous SNR (signal-to-noise) due to sensitivity of sensors showing spatial distribution ratio) to correct the data so that the corrected data is uniform. Background technique [0002] An MRI (Magnetic Resonance Imaging) apparatus has conventionally been used as a monitoring apparatus in the medical field (see, for example, Japanese Patent No. 3135592). [0003] The MRI apparatus generates a gradient magnetic field by gradient coils placed in the imaging region of the object in a cylindrical static field magnet for generating a static magnetic field, and makes atomic nuclei in the object spontaneously A device that generates magnetic resonance and reconstructs an image of an object by using the NMR (nuclear magnetic resonance) signals generated due to the exc...
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IPC IPC(8): A61B5/055A61B6/03G06F19/00
Inventor 木村德典
Owner TOSHIBA MEDICAL SYST CORP