**Selected as a Doody’s Essential Title for 2025!**

A vital reference for the entire radiation oncology team, *Khan’s The Physics of Radiation Therapy* thoroughly covers the physics and practical clinical applications of advanced radiation therapy technologies. Dr. John Gibbons continues the tradition established by Dr. Khan in previous editions, ensuring that the **6th Edition** provides state-of-the-art information for radiation oncologists, medical physicists, dosimetrists, radiation therapists, and residents alike. This updated classic remains one of the most practical radiation therapy physics texts available, offering an ideal balance between theoretical principles and clinical application.

* Includes new quality conversion factors and procedures for calibrating flattening filter-free linear accelerators (linacs), updated recommendations for Monitor Unit Calculations and Failure Mode and Effects Analysis (FMEA), the addition of the Boltzmann Transport calculation algorithm, and expanded coverage of optical surface imaging and magnetic resonance image-guided radiation therapy technologies.
* Features a new chapter on knowledge-based treatment planning.
* Covers 3D conformal radiotherapy (3D-CRT), stereotactic radiosurgery (SRS), high-dose-rate remote afterloaders (HDR), intensity-modulated radiation therapy (IMRT), image-guided radiation therapy (IGRT), Volumetric Modulated Arc Therapy (VMAT), and proton beam therapy.
* Explains the physical principles underlying treatment planning, treatment delivery, and radiation dosimetry in a clear, clinically relevant manner.
* Provides comprehensive, up-to-date coverage of modern radiation therapy techniques, making it an indispensable resource for education, certification preparation, and everyday clinical practice.