Essentials of Medical Physics and Biomedical Applications provides a comprehensive overview of the fundamental principles of medical physics and their practical relevance in modern healthcare. The book is designed to serve both graduate and postgraduate students, as well as professionals aiming to strengthen their knowledge in this interdisciplinary field. It covers a wide spectrum of topics including radiation physics, medical imaging, radiation therapy, biomaterials, biomechanics, and biomedical instrumentation. Special emphasis is placed on clinical applications, safety considerations, and the integration of emerging technologies. The text highlights how physics concepts intersect with engineering, biology, and healthcare to support diagnosis, treatment, and innovation. By explaining concepts in a systematic and clear manner, the book equips readers with both theoretical foundations and practical insights. It also addresses the role of technological advancements, such as AI-assisted diagnostics and 3D printing, in shaping the future of medical physics. This resource acts as a bridge between core physics principles and real-world biomedical applications, making it indispensable for students, researchers, and practitioners. Ultimately, it aims to inspire innovation while ensuring that patient care and safety remain at the center of scientific progress.