Development of a Multi-layer Solid Phantom for Intensity-Modulated Radiation Therapy

The Intensity-Modulated Radiation Therapy (IMRT) based on the conformal radiotherapy has been generally used to deliver non-uniform fluence to the patient. Hence, before a treatment, accurate dose verification is required to obtain the successful treatment of tumors. The evaluation of dose distribution has been normally performed with a phantom and an ion chamber. Most of phantoms in other studies are generally designed for homogeneous condition, in spite of radiation treatment environment depended on the various patient-specific conditions. Therefore, a heterogeneous plastic phantom transformed into the diverse configurations was designed in this study, and manufactured to increase the accuracy of Quality Assurance (QA) in practice