Cited by 35Reinforcement Learning in RoboticsAdvanced Radiotherapy TechniquesArtificial Intelligence in Healthcare and Education

Deep reinforcement learning and its applications in medical imaging and radiation therapy: a survey

Xu, Lanyu, Zhu, Simeng, Wen, Ning·2022·Physics in Medicine & Biology

Abstract

Reinforcement learning takes sequential decision-making approaches by learning the policy through trial and error based on interaction with the environment. Combining deep learning and reinforcement learning can empower the agent to learn the interactions and the distribution of rewards from state-action pairs to achieve effective and efficient solutions in more complex and dynamic environments. Deep reinforcement learning (DRL) has demonstrated astonishing performance in surpassing the human-level performance in the game domain and many other simulated environments. This paper introduces the basics of reinforcement learning and reviews various categories of DRL algorithms and DRL models developed for medical image analysis and radiation treatment planning optimization. We will also discuss the current challenges of DRL and approaches proposed to make DRL more generalizable and robust in a real-world environment. DRL algorithms, by fostering the designs of the reward function, agents interactions and environment models, can resolve the challenges from scarce and heterogeneous annotated medical image data, which has been a major obstacle to implementing deep learning models in the clinic. DRL is an active research area with enormous potential to improve deep learning applications in medical imaging and radiation therapy planning.

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Crossref · 10.1088/1361-6560/ac9cb3

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Authors
Xu, L., Zhu, S., & Wen, N.
Affiliations
  • Oakland University (US)
  • Henry Ford Health (US)
  • Shanghai Jiao Tong University (CN)
Venue
Physics in Medicine & Biology
Published
2022-11-11
Volume
67
Issue
22
Pages
22TR02
ISSN
  • 0031-9155 (ISSN-L)
  • 1361-6560
OpenAlex
W4307023898
Cited by
35
References
135
Citations by year
2026: 9 · 2025: 11 · 2024: 9 · 2023: 6
FWCI
0.45
Type
journal article
Language
en
Open access
closed
Locations
  • Physics in Medicine and Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Reinforcement Learning in Robotics
  • Physical Sciences › Physics and Astronomy › Radiation › Advanced Radiotherapy Techniques
  • Health Sciences › Medicine › Health Informatics › Artificial Intelligence in Healthcare and Education
Keywords
deep reinforcement learning, medical image analysis, radiotherapy treatment planning, reward function design, sequential decision making
MeSH terms
Algorithms, Humans, Radiography, Reinforcement, Psychology, Neural Networks, Computer, Diffusion Magnetic Resonance Imaging

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