Title :
A fast DRR-based image regestrition algorithm for calculation of setup error in radiotherapy
Author :
Tan, Youheng ; Li, Yongjie ; Yao, Jonathan
Author_Institution :
Sch. of Life Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In radiotherapy, patient setup error is one of the important factors that impact the final therapeutic effect. To help operators correct the patient setup accurately, this paper proposes a method to real-time calculate the offset of patient´s positions automatically. In this method, the mean of Graphics Processing Unit (GPU) is employed to help fast generate the digitally reconstructed radiographs (DRR), and iterative nearest neighbor based optimization algorithm is used to effectively find the setup error. The experimental results demonstrate that our method can realize the image registration fast with high precision. For the given 512 × 512 images, the average registration time is 20.025s with the average error of translation and rotation lower than 0.5mm and 0.5°.
Keywords :
computer graphics; diagnostic radiography; image reconstruction; image registration; iterative methods; medical image processing; optimisation; radiation therapy; digitally reconstructed radiographs; fast DRR-based image registration algorithm; graphics processing unit; iterative nearest neighbor; optimization algorithm; patient setup error; radiotherapy; Biomedical applications of radiation; Computed tomography; Graphics; Hardware; Image generation; Image reconstruction; Medical treatment; Neoplasms; Optimization methods; Space technology;
Conference_Titel :
Medical Image Analysis and Clinical Applications (MIACA), 2010 International Conference on
Conference_Location :
Guangdong
Print_ISBN :
978-1-4244-8011-1
DOI :
10.1109/MIACA.2010.5528512
