ArticleMachine learning. Health2025
Geometry-encoded deep learning (GeoDL) framework for real-time 3D dose verification for online adaptive radiotherapy.
Article in Machine learning. Health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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7 authors.
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Abstract
Background: Accurate and efficient dose verification is vital for online adaptive radiotherapy (ART) while the patient is waiting on the treatment couch. Conventional methods are computationally intensive, limiting ART workflow efficiency and quality. A pilot study successfully illustrated the potential of geometry-encoded deep learning (GeoDL) algorithm for two-dimensional (2D) dose estimation on the central axial plane. This study investigates the feasibility of extending GeoDL for real-time dose verification for the entire three-dimensional (3D) volume of interest, fulfilling the unmet need in real clinical practice. Methods: The proposed GeoDL unifies the representation of fluence maps (FMs) and CT images by resolving the treatment delivery geometry of a linear accelerator (LINAC) to ease the burden of learning the complex domain transformation between FMs and CT image. A carefully designed 3D U-Net was trained on the integrated CT-FM volume to estimate the 3D dose distribution for the entire volume of interest, utilizing a combined loss function focusing on prediction errors in both high and low dose regions. The model was trained and validated on 281 prostate cancer cases, with 24 additional cases employed for independent testing. Results: The proposed GeoDL algorithm achieved highly accurate 3D dose estimation in almost real-time. The average γ passing rate ( Conclusion: This study demonstrates the feasibility of GeoDL in ultra-fast dose verification for ART, with strong performance in relevant dosimetric metrics across the entire volume of interest, positioning it as a valuable tool for real clinical use.
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