Impact of breathing signal‐guided dose modulation on step‐and‐shoot 4D CT image reconstruction

• DOI: 10.1002/mp.17360
• Publication Date: 2024-08-22T21:32:08Z
• Authors: Lukas Wimmert; Annette Schwarz; Tobias Gauer; Christian Hofmann; Jannis Dickmann; Thilo Sentker; Rene Werner
• Keywords: Image-guided radiation therapy

Breathing signal-guided 4D CT sequence scanning such as the intelligent (i4DCT) approach reduces imaging artifacts compared to conventional CT. By design, i4DCT captures entire breathing cycles during beam-on periods, leading redundant projection data and increased radiation exposure patients exhibiting prolonged exhalation phases. A recently proposed breathing-guided dose modulation (DM) algorithm promises lower by temporarily reducing tube current, but impact on image reconstruction resulting images have not been investigated.