ESTRO 2024 - Abstract Book

S3810

Physics - Image acquisition and processing

ESTRO 2024

simulations on our 3D models, to potentially revolutionize adaptive radiotherapy with biplanar imaging for enhanced patient care.

Keywords: 3D Reconstruction, Biplanar X-Rays, Deep Learning

References:

[1] G. Balakrishnan, A. Zhao, M. R. Sabuncu, J. Guttag and A. V. Dalca, "VoxelMorph: A Learning Framework for Deformable Medical Image Registration," in IEEE Transactions on Medical Imaging, vol. 38, no. 8, pp. 1788-1800, Aug. 2019, doi: 10.1109/TMI.2019.2897538. [2] Cafaro, A., Spinat, Q., Leroy, A., Maury, P., Munoz, A., Beldjoudi, G., ... & Paragios, N. (2023, October). X2Vision: 3D CT Reconstruction from Biplanar X-Rays with Deep Structure Prior. In International Conference on Medical Image Computing and Computer-Assisted Intervention (pp. 699-709). Cham: Springer Nature Switzerland.

[3] Dong, G., Dai, J., Li, N., Zhang, C., He, W., Liu, L., ... & Liang, X. (2023). 2D/3D Non-Rigid Image Registration via Two Orthogonal X-ray Projection Images for Lung Tumor Tracking. Bioengineering, 10(2), 144.

[4] Peng, C., Liao, H., Wong, G., Luo, J., Zhou, S. K., & Chellappa, R. (2021, May). Xraysyn: Realistic view synthesis from a single radiograph through ct priors. In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 35, No. 1, pp. 436-444).

853

Digital Poster

Evaluation ability of dual-Energy CT for the extent of osteolytic spinal metastases infiltration

Yuki Wada, Satoshi Kumagai, Tomoki Tozawa, Tetsugaku Shinozaki, Toshiki Murata, Daichi Sugawara, Naoko Mori

Akita University Graduate School of Medicine, Radiology, Akita, Japan

Purpose/Objective:

The international consensus guidelines for target volume definition in spinal stereotactic radiosurgery (SRS) recommend that the gross tumor volume (GTV) be established using all available imaging modalities, including MRI and CT [1]. For the clinical target volume (CTV), the vertebra is divided into six segments: vertebral body, spinous process, bilateral pedicles, and bilateral transverse process/lamina; the segment containing the GTV and the adjacent segments are recommended to be included in the CTV. Therefore, the accurate evaluation of segments, including the GTV, using MRI is necessary. However, in actual clinical practice, MRI is sometimes not possible due to several reasons such as pain caused by bone metastasis or financial constraints. Dual-energy CT (DECT) is an imaging technique that can estimate material density and effective elemental composition from the difference in absorption values between CT images taken at two different voltages. The purpose of this study was to evaluate whether the extent of osteolytic