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- W4310585418 abstract "Ultrasound computed tomography (USCT) has attracted increasing attention for the potential to quantify the acoustic properties of tissues. The three-dimensional (3D) image can be reconstructed by stacking a group of cross-sectional USCT images with sub-millimeter isotropic spatial resolution. However, the interval of the slice images is set in millimeter-scale with a trade-off of imaging speed and axial resolution, resulting in a loss of axial information and a deviation in volumetric measurements. This paper demonstrates a framework based on a deep neural network to virtually refocus a two-dimensional USCT image onto the user-defined 3D surfaces without relying on any additional axial scanning, increasing the number of slice images by 40 times. In the training stage, an input image is appended with a distance matrix (DM) that represents the distance of the target plane from the plane of input image along the axial direction, each image is refocused to a series of planes ranging from -5mm to 5mm with a step size of 0.25mm, that is, 20 planes above and 20 planes below, thus forming around 16000 image pairs. The residual U-Net learns to refocus an input image appended with a DM to a user-define plane. Once the training is complete, a virtual 3D image stack can be generated when provided with a single image appended with a series of DMs. The proposed framework can virtually refocus a single image to multiple user-define planes represented by different DMs, enabling the USCT 3D imaging with sub-millimeter slice intervals." @default.
- W4310585418 created "2022-12-12" @default.
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- W4310585418 date "2022-10-10" @default.
- W4310585418 modified "2023-09-27" @default.
- W4310585418 title "Deep Learning-based Virtual Refocusing of Out-of-Plane Images for Ultrasound Computed Tomography" @default.
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- W4310585418 doi "https://doi.org/10.1109/ius54386.2022.9957222" @default.
- W4310585418 hasPublicationYear "2022" @default.
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