US 2026/0301274 A1Published application

Image processing device and image processing method

AssigneeHamamatsu Photonics K.K.

InventorsKibo OTE, Fumio HASHIMOTO, Yuya ONISHI

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Abstract

An image processing apparatus creates a measurement image in a measurement space different from a real space based on measurement data of a subject acquired by a measurement by using a tomography apparatus, inputs the measurement image to a CNN, and creates a tomographic image in the real space by the CNN. The CNN is based on a U-net structure including an encoder unit, a decoder unit, and a bottleneck unit, and further includes a projection connection unit. The projection connection unit performs projection processing from a sinogram space (the measurement space) to the real space on any one feature map in the encoder unit, and connects the feature map after performing the projection processing to the feature map of an equal size in the decoder unit.

Claims11

Dependent claims

An image processing apparatus for creating a tomographic image of a subject in a real space based on measurement data of the subject acquired by a measurement by using a tomography apparatus, the image processing apparatus comprising:
a measurement image creation unit configured to create a measurement image in a measurement space different from the real space based on the measurement data;
and
a CNN processing unit configured to input the measurement image to a convolutional neural network, and create the tomographic image by the convolutional neural network, wherein
the convolutional neural network includes:
an encoder unit configured to input the measurement image, update a feature map by a convolution operation performed by each of a plurality of convolutional layers, and gradually decrease a spatial size of the feature map;
a decoder unit provided at a subsequent stage of the encoder unit, and configured to update the feature map by a convolution operation performed by each of a plurality of convolutional layers, and gradually increase a spatial size of the feature map;
and
a projection connection unit configured to perform projection processing from the measurement space to the real space on any one feature map in the encoder unit, and connect the feature map after performing the projection processing to the feature map of an equal size in the decoder unit.

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