Puntiwa Oonsiri

Accurate patient positioning is critical in proton therapy, where range uncertainties increase sensitivity to setup errors; therefore, cone beam computed tomography (CBCT) is routinely used for image guidance. However, it also increases radiation dose to norm...

Four-dimensional cone-beam computed tomography (4D-CBCT) provides respiratory motion–resolved imaging for image-guided radiotherapy (IGRT) in thoracic treatments but may increase imaging dose compared with conventional three-dimensional CBCT (3D-CBCT). This s...