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.