Diagnostic imaging is the practice of creating visual representations of the interior of a body. It is done for assessing organ and tissue function and for designing medical interventions for the treatment of abnormalities and disorders. Some of the common imaging procedures include radiography, medical ultrasonography, magnetic resonance imaging (MRI) and X-ray computed tomography (CT). Such diagnostic techniques make use of X-rays, ultrasound, strong magnetic fields, radiopharmaceuticals, etc. Research in the application and interpretation of the medical images generated by diverse imaging techniques is covered under the field of radiology. The act of performing medical procedures with the guidance of imaging technologies is called interventional radiology. Most of the topics introduced in this book cover new techniques and applications of radiology. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in it. This book is appropriate for students seeking detailed information in this area as well as for experts and researchers.