1656 Objectives: To report on the feasibility of respiratory-gated lung radiotherapy with
dependence on 4DPET and 4DCT for treatment planning rather than simulation with …

Results When comparing between phases, less than 5% uncertainty in the phantom study
provided good correlation between the 4D-CT and 4D-PET data. Insignificant differences …

Results Eleven of the fourteen patients (79%) were able to fully complete the imaging
protocol. All ten phases of the gated PET and CT were successfully registered to each other …

Purpose: Respiratory motion causes substantial uncertainty in radiotherapy treatment
planning. Four-dimensional computed tomography (4D-CT) is a useful tool to image tumor …

PURPOSE: To describe the degradation effects produced by respiratory organ and lesion
motion on PET/CT images and to define the role of respiratory gated (RG) 4D-PET/CT …

1373 Objectives: 4D PET-CT imaging is becoming increasingly available for radiotherapy
treatment planning. The possibility to personalize the margins around the tumor will allow …

Purpose: Radiation treatment planning with PET/CT has been shown to be beneficial and
leads to smaller variations in target delineation than using CT only. This study investigates …

256 Objectives: In PET/CT, motion in tissues such as the lungs results in overestimation of
tracer-avid volumes of interest and underestimation of their intensities. Respiratory gating …

1425 Objectives PET/CT guided-radiotherapy (RT) of lung cancer requires estimation and
mitigation of errors due to respiratory motion. A patient-specific workflow was developed to …

[en] The intention behind this study is to almost eliminate the motion artifact and its further
consequences from the moving organ tumor PET-CT images. In PET CT images …