Yasuyuki Futami

TL;DR: A carbon beam of 80 keV/microm in the spread-out Bragg peak was found to be equivalent in biological responses to the neutron beam that is produced at cyclotron facility in National Institute Radiological Sciences (NIRS) by bombarding 30-MeV deuteron beam on beryllium target.

TL;DR: In this article, a positron camera, consisting of a pair of Anger-type scintillation detectors, was developed to verify ranges by using positron emitter beams, and a linear response of a 0.3 mm standard deviation within a ±200 mm region were obtained.

TL;DR: The washout rate of 11C activity implanted by injecting energetic 11C beams into thigh muscle of a rear leg of a rabbit is presented and it is found that about one third of the implanted beta+ activity can be used for imaging and the rest was washed out of the target area.

TL;DR: The result shows that it is sufficiently practical to replace the multiple scattering, nuclear reaction and range straggling of incident particles for real tissues with those for water by adjusting the density, and the relationship between these parameters and the CT numbers was investigated.

TL;DR: A heavy-ion radiotherapy treatment-planning system is upgraded to adapt for the layer-stacking irradiation method, which is to conform a variable spread-out Bragg peak to a target volume by means of dynamic control of the conventional beam-modifying devices.