**Selected for 2026 Doody's Core Titles in Anesthesiology & Pain Medicine**Written by one of the pioneers of the use of ultrasound to guide needle placement, Dr. Andrew T. Gray’s Atlas of Ultrasound-Guided Regional Anesthesia, 4th Edition, remains the reference of choice for clinicians who use ultrasound-guided technology to administer regional blocks. Step-by-step videos and images, board-style review questions, and discussions of new blocks make this highly respected title a must-have reference for anesthesiologists, pain medicine specialists, nurse anesthetists, and emergency physicians-anyone who requires expert guidance on the latest methods to ensure safe and effective needle placement. Helps ensure correct needle placement with numerous 3-D and long-axis views that clearly depict surrounding structuresContains nine new chapters: Ultra High Frequency (UHF) Ultrasound; PENG Block; iPACK Block; External Oblique Intercoastal (EOI) Block; Serratus Anterior Plane Block; Erector Spinae Plane (ESP) Block; Suprazygomatic Maxillary Nerve Block; Ultrasound-Guided Percutaneous Cryoneurolysis for Acute Pain; Artificial Intelligence (AI) in Ultrasound-Guided Regional AnesthesiaIncludes numerous high-quality anatomy illustrations, photographs demonstrating patient positioning, and ultrasound images demonstrating anatomy and needle placementFeatures an expanded video collection with step-by-step guidance of ultrasound-guided techniques, including video flips for PENG, rectus sheath, maxillary nerve, sciatic nerve blocks, and moreIncludes newly revised, board-style review questions to help test your knowledge and prepare you for the ABA examAn eBook version is included with purchase. The eBook allows you to access all of the text, figures, and references, with the ability to search, customize your content, make notes and highlights, and have content read aloud. Additional digital ancillary content may publish up to 6 weeks following the publication date