This is a highly relevant topic area that outlines the benefits of radiation as both a diagnostic and therapeutic tool in contemporary health management. Radiation for medical use encompasses both ionising and non ionising sources. The production and properties of x-rays will be discussed along with associated risks to both patient and staff of their use. Comparisons will be drawn between different types of ionising radiation and the suitability of the images that each type can produce. Non-ionising radiation will be discussed, the major focus being on ultrasound scanning. Here, safety precautions will be highlighted and also the use of ultrasound to produce a suitable medical image, compared to other imaging techniques. Finally, we look towards the future of current developments, discussing the evolution of MRI, CAT and PET scanners and how radiation use has revolutionised the field of medical imaging.