Three-Dimensional Conformal Radiation Therapy 25اسلاید •Modern anatomic imaging technologies, such as x-ray computed tomography ( CT ) and magnetic resonance imaging ( MRI ) provide a fully three-dimensional model of the cancer patient's anatomy, which is often complemented with functional imaging , such as positron emission tomography ( PET ) or magnetic resonance spectroscopy . •Such advanced imaging now allows the radiation oncologist to more accurately ide ...