A novel respiratory surrogate system with table motion correction and visual feedback for computed tomography.

ABSTRACT:

Background and purpose

Managing respiratory motion is crucial for computed tomography (CT) in radiotherapy. Clinical surrogate systems and visual coaching can exhibit inaccuracies due to table motion or sag, limiting effectiveness in deep inspiration breath-hold (DIBH) CT and four-dimensional CT (4DCT). This study evaluated a motion-corrected novel surrogate and feedback system to improve DIBH and 4DCT breathing quality.

Materials and methods

The feedback system was evaluated in phantom tests for table sag compensation under incremental loads (up to 104 kg). For patients, DIBH plateau stability metrics (n = 2) and baseline shifts in 4DCT (n = 3) were assessed. In a volunteer study (n = 10), audio and visual feedback were compared in DIBH and 4DCT scenarios, assessing breath-

SUBMITTER: Lackner NA 

PROVIDER: S-EPMC12495361 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature