Double-helix trajectory for image guided radiation therapy: geometry and image reconstruction

Zhicong Yu; Chuanyong Bai; Daniel Gagnon

doi:10.1117/12.2534383

28 May 2019 Double-helix trajectory for image guided radiation therapy: geometry and image reconstruction

Zhicong Yu, Chuanyong Bai, Daniel Gagnon

Proceedings Volume 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine; 110721Y (2019) https://doi.org/10.1117/12.2534383
Event: Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 2019, Philadelphia, United States

Abstract

Cone-beam CT (CBCT) is a prevalent tool for image-guided radiation therapy (IGRT). It can be used for patient positioning and dose calculation, which are needed at the early and later stages of each fraction of treatment, respectively. The requirement of image quality on patient positioning is less demanding than that on dose calculation. This work introduces a two-pass data acquisition approach for CBCT imaging in IGRT, with the first pass being left-handed helix and the second pass being right-handed helix. The first scan alone produces images for patient positioning, whereas the two scans together are used to produce quality improved images for dose calculation. We refer to this two-pass data acquisition geometry as the double-helix trajectory. We propose a dedicated image reconstruction algorithm for the double-helix trajectory and demonstrate the algorithm via computer simulations.

Citation Download Citation

Zhicong Yu, Chuanyong Bai, and Daniel Gagnon "Double-helix trajectory for image guided radiation therapy: geometry and image reconstruction", Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110721Y (28 May 2019); https://doi.org/10.1117/12.2534383

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available