ITERATIVE RESTORATION OF CORRUPTED MR IMAGES
Systems and methods for image restoration of medical imaging data using an incremental process. The image restoration problem is decomposed into a sequence of intermediate steps that are easier to process than a single large step directly from the input to an output. Intermediate reconstructions are generated iteratively which provide for mapping a low-quality input to a high-quality reconstruction through a sequence of slightly less corrupted images.
1 . A method for image restoration, the method comprising:
acquiring medical imaging data;
inputting the medical imaging data into an iterative restoration network, the iterative restoration network configured to output higher quality medical imaging data using multiple incremental steps that provide a sequence of slightly less corrupted images; and
outputting, by the iterative restoration network, the higher quality medical imaging data.
2 . The method of claim 1 , wherein the medical imaging data is acquired using a magnetic resonance imaging device.
3 . The method of claim 1 , wherein the iterative restoration network is configured to reconstruct a high-resolution image from a low-resolution image.
4 . The method of claim 1 , wherein the iterative restoration network is configured to denoise the medical imaging data.
5 . The method of claim 1 , wherein each incremental step includes a CNN and a data consistency layer.
6 . The method of claim 1 , wherein a rate of restoration at each incremental step is controlled by a predefined parameter.
7 . The method of claim 6 , wherein the predefined parameter is defined as a function of time or as a constant speed.
8 . The method of claim 1 , wherein the iterative restoration network is trained by optimizing a loss of a convex combination of input and ground truth images.
9 . The method of claim 1 , wherein an amount of white noise is added to an output of each incremental step.
10 . A system for image restoration, the system comprising:
a medical imaging device configured to acquire medical imaging data of a patient;
an iterative restoration network with a plurality of stages trained using machine learning, each stage of the plurality of stages configured to incrementally improve a quality of input image data from a previous stage; and
a processor configured to apply the iterative restoration network to medical imaging data from the medical imaging device and to provide a representation of the patient based on an output of the iterative restoration network.
11 . The system of claim 10 , wherein the medical imaging device comprises a magnetic resonance imaging device.
12 . The system of claim 10 , wherein the iterative restoration network is configured to reconstruct a high-resolution image from a low-resolution image.
13 . The system of claim 10 , wherein the iterative restoration network is configured to denoise the medical imaging data.
14 . The system of claim 10 , wherein a rate of an incremental improvement by each stage of the plurality of stages is controlled by a predefined parameter.
15 . The system of claim 14 , wherein the predefined parameter is defined as a function of time or as a constant speed.
16 . The system of claim 10 , wherein the iterative restoration network is trained by optimizing a loss of a convex combination of input and ground truth images.
17 . A non-transitory computer readable storage medium comprising a set of computer-readable instructions stored thereon which, when executed by at least one processor cause the processor to:
acquire medical imaging data;
input the medical imaging data into an iterative restoration network, the iterative restoration network configured to output higher quality medical imaging data using a plurality of incremental steps that provide a sequence of slightly less corrupted images; and
output, by the iterative restoration network, higher quality medical imaging data.
18 . The non-transitory computer readable storage medium of claim 17 , further comprising instructions to:
display the higher quality medical imaging data.
19 . The non-transitory computer readable storage medium of claim 17 , wherein the higher quality medical imaging data includes less noise, is less blurry, or includes less noise and is less blurry than the input image data.
20 . The non-transitory computer readable storage medium of claim 17 , wherein a rate of each incremental step of the plurality of incremental steps is controlled by a predefined parameter.