Publications by authors named "Wanbin Meng"
Objective: This study aims to develop and test a new technique by using the convergent arcTAN (cATAN) method capable of dealing with the virtual source position delivered by different carbon ion energies from the pattern of scanning-passive scatter beam.
Materials And Methods: A homemade large-format CMOS sensor and Gaf Chromic EBT3 films are used for the virtual source position measurement. The Gaf films are embedded in a self-designed rectangular plastic frame to tighten films and set up on a treatment couch for irradiation in air with the film perpendicular to the carbon ion beam at the nominal source-axis-distance (SAD) as well as upstream and downstream from the SAD.
Analysis of the Dose Drop at the Edge of the Target Area in Heavy Ion Radiotherapy.
Comput Math Methods Med
February 2022
Background: The dose distribution of heavy ions at the edge of the target region will have a steep decay during radiotherapy, which can better protect the surrounding organs at risk.
Objective: To analyze the dose decay gradient at the back edge of the target region during heavy ion radiotherapy.
Methods: Treatment planning system (TPS) was employed to analyze the dose decay at the edge of the beam under different incident modes and multiple dose segmentation conditions during fixed beam irradiation.
Purpose: An experimental and mathematical study for determining the effective point of measurement ( ) for a Farmer-type cylindrical chamber in a carbon ion passive scatter beam is presented.
Methods: The ionization depth curves measured by the Bragg peak chamber were plotted according to the position of the inner surface of the entrance window, while the Farmer chamber was plotted at the tip of the cylindrical geometric center. The ionization depth curves measured by a cylindrical chamber in the 3D water phantom were then compared with a high-precision parallel-plate PTW Bragg peak chamber for inspecting the upstream shift correction of the cylindrical chamber in the carbon ion beam.