1.Digital Tomosynthesis for Patient Alignment System Using Half-fan Mode CBCT Projection Images.
Justin C PARK ; 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
Korean Journal of Medical Physics 2010;21(4):360-366
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.
Cone-Beam Computed Tomography
;
Humans
;
Patient Positioning
Result Analysis
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