Takehiro Tomitani

TL;DR: Comparison with experimental data obtained with a head positron tomograph, positologica, showed reasonable agreement both in the total coincidence rates and in the scatter components in the images for a cylindrical phantom of 20 cm in diameter.

TL;DR: An optimization method is developed in which the extra dose is integrated into the optimization process of the best weighting matrix in order to shorten the treatment time of three-dimensional irradiation with pencil beam scanning.

TL;DR: A research version of a treatment planning tool to utilize an intensity-controlled raster scan method at the new treatment facility in HIMAC and the reliability of the tool was confirmed with irradiation experiments according to the obtained beam steering file.

TL;DR: A quantitative comparison method to evaluate the mean range of incident ions and monitor the activity distribution related to the deposited dose distribution using the maximum likelihood estimation (MLE) method and Fisher's information was calculated under realistic conditions for irradiations with several kinds of ions.

TL;DR: A rotary positron emission computed tomography device is developed for human brain and animal studies that utilizes 64 rectangular BGO detectors arranged at unequal spacing on a circular ring for high detector redundancy.