Visual enhancement of Cone-beam CT by use of CycleGAN

Satoshi Kida, Shizuo Kaji, Kanabu Nawa, Toshikazu Imae, Takahiro Nakamoto, Sho Ozaki, Takeshi Ohta, Yuki Nozawa, Keiichi Nakagawa

研究成果: ジャーナルへの寄稿記事

抜粋

Purpose: Cone-beam computed tomography (CBCT) offers advantages over conventional fan-beam CT in that it requires a shorter time and less exposure to obtain images. However, CBCT images suffer from low soft-tissue contrast, noise, and artifacts compared to conventional fan-beam CT images. Therefore, it is essential to improve the image quality of CBCT. Methods: In this paper, we propose a synthetic approach to translate CBCT images with deep neural networks. Our method requires only unpaired and unaligned CBCT images and planning fan-beam CT (PlanCT) images for training. The CBCT images and PlanCT images may be obtained from other patients as long as they are acquired with the same scanner settings. Once trained, three-dimensionally reconstructed CBCT images can be directly translated into high-quality PlanCT-like images. Results: We demonstrate the effectiveness of our method with images obtained from 20 prostate patients, and provide a statistical and visual comparison. The image quality of the translated images shows substantial improvement in voxel values, spatial uniformity, and artifact suppression compared to those of the original CBCT. The anatomical structures of the original CBCT images were also well preserved in the translated images. Conclusions: Our method produces visually PlanCT-like images from CBCT images while preserving anatomical structures.

元の言語英語
ページ(範囲)998-1010
ページ数13
ジャーナルMedical physics
47
発行部数3
DOI
出版物ステータス出版済み - 3 1 2020

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Radiology Nuclear Medicine and imaging

これを引用

Kida, S., Kaji, S., Nawa, K., Imae, T., Nakamoto, T., Ozaki, S., ... Nakagawa, K. (2020). Visual enhancement of Cone-beam CT by use of CycleGAN. Medical physics, 47(3), 998-1010. https://doi.org/10.1002/mp.13963