Once again Jake Van Dyk has brought together an esteemed group of international experts to describe the latest radiation oncology tools and techniques in volume 4 of The Modern Technology of Radiation Oncology. With technological advancements in radiation oncology continuing at a rapid pace, this book provides state-of-the-art information on making these technologies available in the clinic. Some of the topics addressed in this volume include FLASH RT, surface-guided radiation therapy, PET/MRI, real-time MRI guidance, robust optimization, automated treatment planning, artificial intelligence, big data, machine learning, radiomics, particle therapy RBE, nanoparticle applications, and global access to radiotherapy. These volumes have not only been valued by medical physicists in clinical practice around the world, but also by residents preparing for their certification exams.