Eiji Yoshida

TL;DR: In this article, a depth-of-interaction (DOI) detector was proposed for small animals, such as rats and mice, which meets the demand for higher sensitivity and high resolution.

TL;DR: The proposed 'open PET' geometry, which consists of two axially separated detector rings, is expected to lead to realization of in-beam PET, which is a method for an in situ monitoring of charged particle therapy, by letting the beams pass through the gap.

TL;DR: The first small prototype to show a proof-of-concept of OpenPET imaging was developed and it was confirmed that the tumor in the gap was clearly visualized.

TL;DR: A second-generation OpenPET geometry, single-ring OpenPET, is proposed, which can provide an accessible and observable open space with higher sensitivity and a reduced number of detectors than the earlier one and results indicate that the depth-of-interaction detector can provide uniform resolution even when the detectors are arranged in an ellipsoidal ring.

TL;DR: The second prototype of the X'tal cube with energy resolution of 12.7% was obtained at 511 keV with almost uniform light output for all crystal segments thanks to the effective detection of the scintillation photons.