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KMID : 0384620100210040360
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Korean Journal of Medical Physics
2010 Volume.21 No. 4 p.360 ~ p.366
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Digital Tomosynthesis for Patient Alignment System Using Half-fan Mode CBCT Projection Images
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Park Justin C.
Park Sung-Ho
Kim Jin-Sung
Han Young-Yih
Ju Sang-Gyu
Shin Eun-Hyuk
Shin Jung-Suk
Park Hee-Chul
Ahn Yong-Chan
Song William Y.
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Abstract
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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.
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KEYWORD
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Digital Tomosynthesis, IGRT, Patient positioning, On-board Imager (OBI)
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Listed journal information
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