Imaging technology refers to the use of various methods and devices to create visual representations of objects, structures or processes. Imaging technology includes methods like X-rays, MRI and ultrasound, capturing images of objects and structures for medical diagnosis, scientific research and industrial applications. Molecular imaging technology examines cellular processes using techniques like positron emission tomography (PET) scans, visualizing molecular interactions and functions crucial for medical research and diagnostics. Clinical imaging technology, such as X-rays and MRI, captures detailed images of the human body's internal structures, aiding in medical diagnosis and treatment planning for various conditions. Advances in imaging continue to enhance resolution, speed and specificity, paving the way for more precise diagnoses and innovations in healthcare and beyond. This book attempts to understand the discipline of imaging technology and how such concepts have practical applications. The topics covered in this extensive book deal with the core subjects of molecular imaging and clinical imaging. Through this book, we attempt to further enlighten the readers about the new concepts in this field.