There is a bewildering array of new technology in radiation oncology.  This talk aims to introduce the technology and break down some of the jargon.  In simple terms all radiotherapy planning aims to minimise the normal tissue toxicity while giving the optimal dose to the tumour.  New imaging techniques have helped us define the area we need to treat.  The other side of this equation is having technology to shape the “dose cloud.”  This is where highly conformal techniques are applied.  This talk will outline the technology, where it might be usefully applied and some of the pitfalls.