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- W3108231092 abstract "Volumetric modulated arc therapy (VMAT) can acquire projection images during rotational irradiation, and cone-beam computed tomography (CBCT) images during VMAT delivery can be reconstructed. The poor quality of CBCT images prevents accurate recognition of organ position during the treatment. The purpose of this study was to improve the image quality of CBCT during the treatment by cycle generative adversarial network (CycleGAN).Twenty patients with clinically localized prostate cancer were treated with VMAT, and projection images for intra-treatment CBCT (iCBCT) were acquired. Synthesis of PCT (SynPCT) with improved image quality by CycleGAN requires only unpaired and unaligned iCBCT and planning CT (PCT) images for training. We performed visual and quantitative evaluation to compare iCBCT, SynPCT and PCT deformable image registration (DIR) to confirm the clinical usefulness.We demonstrated suitable CycleGAN networks and hyperparameters for SynPCT. The image quality of SynPCT improved visually and quantitatively while preserving anatomical structures of the original iCBCT. The undesirable deformation of PCT was reduced when SynPCT was used as its reference instead of iCBCT.We have performed image synthesis with preservation of organ position by CycleGAN for iCBCT and confirmed the clinical usefulness." @default.
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- W3108231092 date "2020-01-01" @default.
- W3108231092 modified "2023-10-18" @default.
- W3108231092 title "Improvement in Image Quality of CBCT during Treatment by Cycle Generative Adversarial Network" @default.
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- W3108231092 doi "https://doi.org/10.6009/jjrt.2020_jsrt_76.11.1173" @default.
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