Here are some books that you may find useful during your studies. Search the Bennies catalogue Accessit for more, or browse the Non-fiction collection NFS.
Health Physics by 
X-rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, visible light, ultraviolet radiation and microwaves. One of the most common and beneficial uses of X-rays is for medical imaging. X-rays are also used in treating cancer and in exploring the cosmos.
X-rays were one of the first forms of biomedical imaging and NIBIB's 60 Seconds of Science explain how they create those images of bones we all know well.
A closer look at a real X-ray tube, and the process of generating X-rays.
This tutorial describes how X-rays are produced and how they interact with the body in forming a radiographic image. X-ray safety issues are briefly discussed.
X-rays are produced due to sudden deceleration of fast moving electrons when they collide and interact with the target anode. In this process of deceleration, more than 99% of the electron energy is converted into heat and less than 1% of energy is converted into X-rays.