This course provides radiology residents with an understanding of the physics principles and theory involved for diagnostic radiology imaging modalities as well as prepare for their board exam. The image formation process for each modality as well as the image quality parameters such as noise, spatial resolution and contrast resolution and the effect of these parameters on image quality are discussed. The course also reviews radiology board exam format questions to prepare the resident for the physics component of the ABR board exam. Overall, the course objective is to provide the radiology resident with a better understanding of the technology and physical principles of the equipment used in radiology