公开(公告)号：US20250157099A1

公开(公告)日：2025-05-15

申请号：US18833003

申请日：2023-01-30

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kibo OTE ,  Fumio HASHIMOTO ,  Yuya ONISHI

IPC: G06T11/00 ,  A61B6/03

Abstract: An image processing method, starting from a certain initial state, creates a tomographic image of a subject by repeatedly performing a reconstruction step, a CNN processing step, and an update step a plurality of times. In the reconstruction step, a first image is created by performing processing by using a list mode iterative reconstruction method. In the CNN processing step, input information is input to a CNN and a second image is created by the CNN by using a DIP technique, and the CNN is trained. In the update step, a third image is updated based on the first image and the second image.

公开(公告)号：US20240366166A1

公开(公告)日：2024-11-07

申请号：US18683279

申请日：2022-08-18

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuya ONISHI ,  Ryosuke OTA ,  Fumio HASHIMOTO ,  Kibo OTE

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/42 ,  G01T1/20

Abstract: A tomographic image creation apparatus includes a time difference calculation unit, a signal waveform processing unit, an error estimation unit, a γ-ray pair generation position calculation unit, and an image creation unit. The time difference calculation unit calculates, for each of γ-ray pair coincidence events, a time difference of a timing at which a value of each of a first signal and a second signal output from a signal waveform acquisition unit reaches a threshold value. The signal waveform processing unit relatively shifts a waveform of the first signal or a waveform of the second signal by the time difference in a direction approaching each other. The error estimation unit estimates an error of the time difference by a DNN based on the waveform of each of the first signal and the second signal after shifting.