Method for super-resolution reconstruction using focal underdetermined system solver algorithm
AssigneeSamsung Electronics Co., Ltd.
InventorsJong-Chul Ye, Hong Jung, Jaeheung Yoo, Sung-ho Tak
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Abstract
Disclosed is a high-resolution image reconstruction method using a focal underdetermined system solver (FOCUSS) algorithm. The method comprises the steps of: outputting data for an image of an object; downsampling the outputted data; transforming the downsampled data into low-resolution image frequency data; and reconstructing a high-resolution image from the transformed low-resolution image frequency data by applying focal underdetermined system solver (FOCUSS) algorithm.
Claims42
A method for forming a high-resolution image of an object, the method comprising the steps of:
- (a) using a medical device for:
- (a1) applying incident radiation to the object;
- (a2) receiving response radiation from the object;
- and
- (a3) outputting data for an image of an the object from the response radiation;
- (b) downsampling the outputted data using the medical device;
- (c) transforming the downsampled data into low-resolution image frequency data using the medical device;
- and
- (d) reconstructing a, using the medical device, the high-resolution image from the transformed low-resolution image frequency data by applying a focal underdetermined system solver (FOCUSS) algorithm;
- and
- (e) displaying the high-resolution image using a display for providing the high-resolution image for examining the object.
A method for forming a high-resolution image of an object, the method comprising the steps of:
- (a) downsampling data representative of an image of the object at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- (b) transforming the downsampled data into low-resolution initial estimation data using the medical device applying a transformation to the downsampled data;
- (c) reconstructing, using the medical device, the high-resolution image from the transformed low-resolution initial estimation data by applying a focal underdetermined system solver (FOCUSS) algorithm;
- and
- (d) displaying the high-resolution image using a display for providing the high-resolution image for examining the object.
A magnetic resonance imaging apparatus comprising:
- a medical device for downsampling data representative of an image of the object at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- transforming the downsampled data into low-resolution initial estimation data by applying a transformation to the downsampled data;
- and reconstructing a high-resolution image from the transformed low-resolution initial estimation data by applying a focal underdetermined system solver (FOCUSS) algorithm;
- and
- a display for displaying the high-resolution image for providing the high-resolution image for examining the object.
A method for forming a high-resolution image of an object, the method comprising the steps of:
- (a) downsampling data representative of an image of the object at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- (b) transforming the downsampled data into low-resolution initial estimation data using the medical device applying a transformation to the downsampled data;
- (c) reconstructing, using the medical device, the high-resolution image from the transformed low-resolution initial estimation data by applying a sparse recovery algorithm to the low-resolution initial estimation data, which algorithm multiplies the low-resolution initial estimation data by a weighting factor;
- and
- (d) displaying the high-resolution image using a display for providing the high-resolution image for examining the object.
A magnetic resonance imaging apparatus comprising:
- a medical device for downsampling data representative of the image of the object at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- transforming the downsampled data into low-resolution initial estimation data by applying a transformation to the downsampled data;
- and reconstructing a high-resolution image from the transformed low-resolution initial estimation data by applying a sparse recovery algorithm to the low-resolution initial estimation data, which algorithm multiplies the low-resolution initial estimation data by a weighting factor;
- and
- a display for displaying the high-resolution image for providing the high-resolution image for examining the object.
A method for processing dynamic image data obtained from a magnetic resonance imaging (MRI) apparatus, for forming a high resolution moving image of at least a portion of a living subject, the method comprising the following steps:
- (a) downsampling a set of data representative of an moving image of the moving object from the response radiation at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- (b) transforming the downsampled data into low-resolution initial estimation data using the medical device applying a transformation to the downsampled data;
- (c) reconstructing, using the medical device, the high-resolution moving image from the transformed low-resolution initial estimation data by applying a sparse recovery algorithm to the low-resolution initial estimation data, which algorithm multiplies the low-resolution initial estimation data by a weighting factor;
- and
- (d) displaying the high-resolution moving image using a display for providing the high-resolution moving image for examining the moving object.
A magnetic resonance imaging apparatus for performing a high resolution image reconstruction on data representative of an image of an object, the magnetic resonance imaging apparatus comprising:
- a medical device for downsampling a set of the data representative of the image of the object at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device;
- transforming the downsampled data into low-resolution initial estimation data by applying a transformation to the downsampled data;
- and reconstructing a high-resolution image from the transformed low-resolution initial estimation data by applying a sparse recovery algorithm to the low-resolution initial estimation data, which algorithm multiplies the low-resolution initial estimation data by a weighting factor;
- and
- a display for displaying the high-resolution image for providing the high-resolution image for examining the object.
A parallel imaging method for processing magnetic resonance imaging (MRI) data obtained by the use of multiple coils of an MRI apparatus, for forming a high resolution image of an object, the method comprising:
- (a) down sampling a set of MRI data from each of a respective one of the multiple coils at a rate lower than Nyquist sampling rate, the downsampled data being received from the object after applying incident radiation to the object using a medical device, where each set of MRI data is representative of the object;
- (b) transforming each of the down sampled data sets into low-resolution initial estimation data sets using the medical device applying a transformation to the obtained data sets;
- and
- (c) reconstructing, using the medical device, the high-resolution image from the transformed low-resolution initial estimation data sets by applying a sparse recovery algorithm to the low-resolution initial estimation data, which algorithm multiplies the low-resolution initial estimation data by a weighting factor;
- and
- (d) displaying the high-resolution image using a display for providing the high-resolution image for examining the object.
Dependencies are inferred from the claim text.