This book was developed from a successful review course for senior radiology residents preparing for the ACR written Board examination. Although intended to review and reinforce concepts learned from didactic lectures and other reading, many residents have successfully relied on Huda as their sole means of preparation. Intended as a comprehensive review source for radiology residents preparing for the physics portion of the American Board of Radiology written examination and for radiologic technologists preparing for the American Registry of Radiologic Technologists certification examination. The book features a complete review of x-ray production and interaction on all modalities. More than 500 exam practice questions to help the user fully prepare for their examinations.