In the rapidly evolving field of biomedicine, the integration of physics into medical research and practice has become increasingly pivotal. The intersection of applied physics and biomedicine represents a frontier of innovation, where principles of physics are leveraged to solve complex biological and medical challenges. This book, Applied Physics in Biomedicine, is crafted to explore and elucidate this synergy, offering a comprehensive overview of how physical principles are applied to advance our understanding and treatment of medical conditions. The application of physics to biomedical science is not a new concept, but its importance has become more pronounced with the advancement of technology and scientific research. From imaging techniques like MRI and PET scans to the development of sophisticated diagnostic tools and therapeutic devices, physics has significantly shaped the landscape of modern medicine. The precision and accuracy provided by physical principles enable clinicians and researchers to explore biological systems at unprecedented levels of detail, leading to more effective diagnostics, treatments, and interventions. This book is designed to cater to a broad audience, including students, researchers, and professionals in the fields of physics, biomedicine, and medical engineering. Its primary aim is to bridge the gap between theoretical physics and practical biomedical applications, demonstrating how fundamental physical concepts are translated into innovative medical technologies and methodologies. The content is structured to cover a wide range of topics, beginning with foundational principles and advancing to complex applications. Early chapters provide an overview of essential physics concepts relevant to biomedicine, such as electromagnetism, optics, and mechanics. Subsequent chapters delve into specific applications, including imaging techniques, radiation therapy, biosensors, and nanotechnology. Each section not only presents the underlying physical principles but also explores real-world applications, case studies, and current research trends. The inspiration for this book stems from the remarkable advancements witnessed at the crossroads of physics and biomedicine over recent decades. Innovations in medical imaging, therapeutic techniques, and diagnostic tools have profoundly impacted patient care and research. These developments underscore the importance of a collaborative approach, where physicists, engineers, and medical professionals work together to push the boundaries of what is possible.