Ambient artificial intelligence in smart healthcare systems: Architecture, applications, challenges, and future directions

Smart Health represents the convergence of digital technologies, intelligent systems, and connected healthcare environments to improve the quality, efficiency, and accessibility of healthcare services. Ambient Artificial Intelligence (Ambient AI) has emerged as a core enabler of Smart Health by embedding context-aware, adaptive, and unobtrusive intelligence into clinical and non-clinical healthcare settings. Ambient AI systems continuously sense, analyze, and respond to multimodal data from patients, clinicians, and environments without interrupting routine workflows. This review presents a comprehensive and structured analysis of Ambient AI in Smart Healthcare Systems, focusing on conceptual foundations, system architectures, enabling technologies, and real-world applications. Key use cases include ambient clinical documentation, smart hospitals, continuous patient monitoring, telehealth, and assisted living. The review further discusses the benefits of Ambient AI in enhancing clinical efficiency, patient safety, and personalized care, while critically examining challenges related to data privacy, interoperability, algorithmic bias, ethical considerations, and regulatory compliance. Finally, future research directions are outlined to support the scalable, trustworthy, and equitable deployment of Ambient AI as a foundational component of next-generation Smart Health ecosystems. This review is intended to provide researchers, practitioners, and policymakers with a consolidated understanding of Ambient AI and its role in advancing smart and sustainable healthcare systems.