Digital Tomosynthesis for Patient Alignment System Using Half-fan Mode CBCT Projection Images.
- Author:
Justin C PARK
1
;
Sung Ho PARK
;
Jin Sung KIM
;
Yongyih HAN
;
Sang Gyu JU
;
Eunhyuk SHIN
;
Jung Suk SHIN
;
Hee Chul PARK
;
Yong Chan AHN
;
Willian Y SONG
Author Information
1. Department of Radiation Oncology, Asan Medical Center, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Digital Tomosynthesis;
IGRT;
Patient positioning;
On-board Imager (OBI)
- MeSH:
Cone-Beam Computed Tomography;
Humans;
Patient Positioning
- From:Korean Journal of Medical Physics
2010;21(4):360-366
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
To generate on-board digital tomosynthesis (DTS) for three-dimensionalimage-guided radiation therapy (IGRT) as an alternative to conventional portal imaging or on-board cone-beam computed tomography (CBCT), two clinical cases (liver and bladder) were selected to illustrate the capabilities of on-board DTS for IGRT. DTS images were generated from subsets of CBCT projection data (45, 162 projections) using half-fan mode scanning with a Feldkamp-type reconstruction algorithm. Digital tomosynthesis slices appeared similar to coincident CBCT planes and yielded substantially more anatomic information. Improved bony and soft-tissue visibility in DTS images is likely to improve target localization compared with radiographic verification techniques and might allow for daily localization of a soft-tissue target. Digital tomosynthesis might allow targeting of the treatment volume on the basis of daily localization.
