RT Journal Article
T1 3D Reconstruction and alignment by consumer RGB-D sensors and fiducial planar markers for patient positioning in radiation therapy.
A1 Sarmadi, Hamid
A1 Muñoz-Salinas, Rafael
A1 Álvaro Berbis, M
A1 Luna, Antonio
A1 Medina-Carnicer, R
K1 3D Reconstructions
K1 Fiducial markers
K1 Patient positioning
K1 RGB-D sensors
K1 Radiation therapy
K1 Surface guided radiation therapy (SGRT)
AB Patient positioning is a crucial step in radiation therapy, for which non-invasive methods have been developed based on surface reconstruction using optical 3D imaging. However, most solutions need expensive specialized hardware and a careful calibration procedure that must be repeated over time.This paper proposes a fast and cheap patient positioning method based on inexpensive consumer level RGB-D sensors. The proposed method relies on a 3D reconstruction approach that fuses, in real-time, artificial and natural visual landmarks recorded from a hand-held RGB-D sensor. The video sequence is transformed into a set of keyframes with known poses, that are later refined to obtain a realistic 3D reconstruction of the patient. The use of artificial landmarks allows our method to automatically align the reconstruction to a reference one, without the need of calibrating the system with respect to the linear accelerator coordinate system. The experiments conducted show that our method obtains a median of 1 cm in translational error, and 1∘of rotational error with respect to reference pose. Additionally, the proposed method shows as visual output overlayed poses (from the reference and the current scene) and an error map that can be used to correct the patient's current pose to match the reference pose. A novel approach to obtain 3D body reconstructions for patient positioning without requiring expensive hardware or dedicated graphic cards is proposed. The method can be used to align in real time the patient's current pose to a preview pose, which is a relevant step in radiation therapy.
PB Elsevier
YR 2019
FD 2019-08-03
LK http://hdl.handle.net/10668/14407
UL http://hdl.handle.net/10668/14407
LA en
NO Sarmadi H, Muñoz-Salinas R, Álvaro Berbís M, Luna A, Medina-Carnicer R. 3D Reconstruction and alignment by consumer RGB-D sensors and fiducial planar markers for patient positioning in radiation therapy. Comput Methods Programs Biomed. 2019 Oct;180:105004
NO This project has been funded under projects TIN2016-75279-P and IFI16/00033 (ISCIII) of Spain Ministry of Economy, Industry and Competitiveness, and FEDER. The authors thank the Health Time Radiology Company for its help for the Project IFI16/00033 (ISCIII)
DS RISalud
RD Apr 7, 2025