Background And Purpose: During radiotherapy planning high density dental materials create a major challenge in determining correct dose distribution inside patients with head-and-neck tumors.
Patients And Methods: In this work we investigated the absorbed dose distribution inside a solid water slab phantom with embedded high density material irradiated by a 6MV photon beam of field size 10x10cm. We evaluated the absorbed dose distribution with three different techniques: superposition algorithm, radiochromic film, and the fluence map Monte Carlo (FMMC) method.
Purpose: Underdosage in the human larynx may be the true factor behind the decrease in local control rates.
Patients And Methods: To evaluate underdosage with Monte Carlo a CT-based geometrical model of the patient's neck (mathematical neck) was created. Dose was calculated for a pair of 6 Me V parallel-opposed photon beams modulated with 15 degree steel wedges.
Int J Radiat Oncol Biol Phys
December 2005
Purpose: The effect of rotational errors on the coverage of clinical target volumes (CTVs) is examined. A new planning target volume (PTV) construction that considers the individual paths traced by movements of the target boundary points is developed.
Methods And Materials: A standard uniform margin expansion was compared with a PTV constructed from the space swept out by a concave moving target.
© LitMetric 2025. All rights reserved.