9 March 2018 Development of solid water phantom using wax
Author Affiliations +
Abstract
In this work, we develop wax-based solid water phantoms for CT systems that have radiation characteristics close to those of water for clinically appropriate CT tube voltages. Most commercial solid water phantoms are made with non-water-based materials for durability. However, manufacture-grade solid water is difficult to replicate in a common lab setting and ingredients can be toxic. We have developed a wax-based solid water phantom for a coronary calcified plaque phantom for our ongoing research project where calcium-based material and fatty material are mixed into the water-equivalent material. We chose soy wax as a main ingredient because it is non-toxic and can be easily used to develop more realistic coronary plaques with a variety of compositions (e.g., more wax for fattier plaque). We determined additional ingredients and concentrations needed to make solid water phantoms via least squares method where the mass fraction of each material was estimated by minimizing the difference between the linear attenuation coefficients of water and the mixture. Based on the analytical calculation, physical solid water phantoms were developed and were scanned using micro-CT and clinical CT systems to experimentally verify the optimal concentration of the mixed material and phantom homogeneity. The CT values of our solid water phantom at the optimal concentration was found comparable to that of water and had similar variance. In addition to supporting our plaque phantom development, this solid water phantom could be used as a basis to develop a variety of other complex tissue-mimicking phantoms for use in clinical CT scanner.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomoe Hagio, Tomoe Hagio, Qin Li, Qin Li, Bahaa Ghammraoui, Bahaa Ghammraoui, Robert J. Jennings, Robert J. Jennings, Benjamin P. Berman, Benjamin P. Berman, Nicholas A. Petrick, Nicholas A. Petrick, } "Development of solid water phantom using wax", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 105732W (9 March 2018); doi: 10.1117/12.2292933; https://doi.org/10.1117/12.2292933
PROCEEDINGS
8 PAGES


SHARE
RELATED CONTENT

Design of spectral filtering for tissue classification
Proceedings of SPIE (February 13 2012)
New CT tube performance specifications
Proceedings of SPIE (May 05 2004)
The Role Of CT Scanners In Radiotherapy
Proceedings of SPIE (December 22 1976)

Back to Top