Browsing by author "Shieh, C-C"
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The adaptation and investigation of cone-beam CT reconstruction algorithms for horizontal rotation fixed-gantry scans of rabbits.
Gardner, M; Dillon, O; Shieh, C-C; O'Brien, R; Debrot, E; Barber, J; Ahern, V; Bennett, P; Heng, SM; Corde, S; Jackson, M; Keall, PPublished 2021Fixed-gantry radiation therapy has been proposed as a low-cost alternative to the conventional rotating-gantry radiation therapy, that may help meet the rising global treatment demand. Fixed-gantry systems require gravitational ...Open AccessArticle -
Dual cardiac and respiratory gated thoracic imaging via adaptive gantry velocity and projection rate modulation on a linear accelerator: A Proof-of-Concept Simulation Study.
Reynolds, T; Shieh, C-C; Keall, P; O'Brien, RPublished 2019-01-01Purpose: Cardiac motion is typically not accounted for during pretreatment imaging for central lung and mediastinal tumors. However, cardiac induced tumor motion averages 5.8 mm for esophageal tumors and 3-5 mm for some ...Open AccessArticle -
The First Implementation of Respiratory Triggered 4DCBCT on a Linear Accelerator
O'Brien, R; Cooper, B; Shieh, C-C; Stankovic, U; Keall, P; Sonke, J-JPublished 2016-05-01Four Dimensional Cone Beam Computed Tomography (4DCBCT) is an image guidance strategy used for patient positioning in radiotherapy. In conventional implementations of 4DCBCT, a constant gantry speed and a constant projection ...Open AccessArticle -
Optimizing 4DCBCT Projection Allocation to Respiratory Bins
O'Brien, R; Kipritidis, J; Shieh, C-C; Keall, PPublished 2014-10-01Four dimensional cone beam computed tomography (4DCBCT) is an emerging image guidance strategy used in radiotherapy where projections acquired during a scan are sorted into respiratory bins based on the respiratory phase ...Open AccessArticle -
Pre-treatment and real-time image guidance for a fixed-beam radiotherapy system.
Liu, P; Gardner, M; Heng, SM; Shieh, C-C; Nguyen, DT; Debrot, E; O'Brien, R; Downes, S; Jackson, M; Keall, PPublished 2021Purpose: A radiotherapy system with a fixed treatment beam and a rotating patient positioning system could be smaller, more robust and more cost effective compared to conventional rotating gantry systems. However, patient ...Open AccessArticle -
Real-time direct diaphragm tracking using kV imaging on a standard linear accelerator.
Hindley, N; Keall, P; Booth, J; Shieh, C-CPublished 2019-01-01Purpose: As the predominant driver of respiratory motion, the diaphragm represents a key surrogate for motion management during the irradiation of thoracic cancers. Existing approaches to diaphragm tracking often produce ...Open AccessArticle -
Respiratory Motion Guided Four Dimensional Cone Beam Computed Tomography: Encompassing Irregular Breathing
O'Brien, R; Cooper, B; Kipritidis, J; Shieh, C-C; Keall, PPublished 2014-02-01Four dimensional cone beam computed tomography (4DCBCT) images su er from angular under sampling and bunching of projections due to a lack of feedback between the respiratory signal and the acquisition system. To address ...Open AccessArticle -
SPARE: Sparse-view reconstruction challenge for 4D cone-beam CT from a 1-min scan.
Shieh, C-C; Gonzalez, Y; Li, B; Jia, X; Rit, S; Mory, S; Riblett, M; Hugo, G; Zhang, Y; Jiang, Z; Liu, X; Ren, L; Keall, PPublished 2019-01-01Purpose: Currently, four-dimensional (4D) cone-beam computed tomography (CBCT) requires a 3-4 min full-fan scan to ensure usable image quality. Recent advancements in sparse-view 4D-CBCT reconstruction have opened the ...Open AccessArticle
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