This lecture covers the principles of radiation imaging, focusing on transmission imaging techniques like radiography and tomography. The detection technology and physics behind a Deuterium plasma neutron generator designed for imaging are explained, along with the setup of a detector array. The lecture also discusses the challenges in developing radiation detectors, the competition in the market, and the lessons learned from a successful Kickstarter campaign. The instructor shares insights on customer preferences, the evolution of radiation detectors, and the future of radiation detection technology.