Design and construction of anthropomorphic phantom, using a CT-Scan of a particular patient for CT-Scan dosimetry studies

Abstract

Background: Organ dose measurements in diagnostic radiology and radiation therapy are extremely important. Due to some limitations on patient dose measurements, phantoms have been used for this goal. One of the most important types of phantoms, is anthropomorphic one. This report aimed at construction of an anthropomorphic phantom for application of dosimetry studies of CT-scans. Methods: To construct the phantom, several different materials were used for the adaptation of soft tissue and bone. Perspex was used for soft tissue a polyurethane-based mixture for compact bone tissue. Using highly detailed software, three-dimensional design of phantom was modeled; so that, anatomical segments of phantom were well adapted to CT-scan of the patient. Findings: Using the CT-scan of phantom, Hounsfield numbers of soft tissue and bone material used in the phantom were obtained. The obtained Hounsfield numbers had very good conformity with Hounsfield numbers of soft and bone tissues of the human body and confirmed the accuracy of the study. Conclusion: The project was presented in a way that it can be used to design any particular patient in a phantom with three-dimensional design. The method that was used to build the phantom can be more and more widely used in manufacturing other phantoms and also total human body phantom. © 2015, Isfahan University of Medical Sciences(IUMS). All rights reserved.