Yasushi Nagata, M.D, Ph.D, FACR, was born in Kyoto and graduated from Kyoto University in 1982 and spent his junior residency at Kyoto University Hospital between 1983-1993. He was a Visiting Assistant Professor of the University of Minnesota, USA between 1993-1994.He was an Assistant Professor and an Associate Professor between 1994-2008 at the Dept. of Therapeutic Radiology, Kyoto University. He was the Professor and Chairman, Dept. of Radiation Oncology, Hiroshima University between 2008-2023.

He was also appointed as the Director of Hiroshima High-precision Radiotherapy Cancer Center (HIPRAC) between 2015-2023.He is the Emeritus Professor of Hiroshima University and Emeritus Director of HIPRAC since 2023. He is also the Secretary General of the Federation of Asian Organizations for Radiation Oncology (FARO) since 2022. He won the Umegaki Award from JASTRO in1996, and the Abe Award from JASTRO in 2006. He was awarded as a Fellow of American College of Radiology since 2018. His major subjects are 3-D treatment planning, stereotactic body radiotherapy (SBRT) in the field of Radiation Oncology. He developed a CT simulator at Kyoto University in cooperation with NEC and Shimadzu company in 1987. His work on CT simulator published was one of the top 100 remarkable establishment in the field of radiation oncology.

Later, he worked in 3-d radiotherapy and started SBRT in 1996. He contributed to the JCOG 0403 trial since 2004 and reported at the international meetings several times, and published in 2015. He is also the PI of the JCOG 1408 trial started in 2016. The first edition of this book was published in 2015 and this is the second edition.