With the material parameter database, IT’IS aims to provide values for EM, thermal ,and fluid properties of biological tissues to the modeling community in a free, easily accessible, and dynamically evolving manner. The database is drawn from a comprehensive scientific literature review and is continuously updated. The IT’IS Foundation, a non-profit and independent research organization, is committed to the long-term maintenance of this material parameter database. IT'IS relies heavily on input from database users, whose engagement in the upkeep of the database via a specific forum is strongly encouraged.
Although the Virtual Population models developed by IT’IS have been employed to simulate a wide range of physical phenomena, they were initially developed to simulate EM-tissue interactions and EM-induced heating. With the SEMCAD X and Sim4Life simulation software packages, users are able to import the material database and automatically assign tissue parameter values to the Virtual Population models.
The database aims not only to provide the most up-to-date and comprehensive estimates for tissue material parameter values but also statistical information about the spread and standard deviation per tissue for the different thermal and fluidic parameters. This information is important for assessment of the contribution to the uncertainty in a quantity of interest due to the selection of the material parameters. For some material parameters, e.g., perfusion, the variation can be large, which in turn can have a server effect on simulation results.
The IT’IS material parameter database is envisioned as a webresource to be continuously developed and improvied. General considerations, remarks, and known issues regarding the database are summarized in the documentation available for download. Although revised versions of the database have been published, previous versions remain accessible, together with a log file documenting the changes. Our user forum is designed for users to suggest additional references, to question the assumptions behind the current values, and to discuss possible improvements. The goal is to launch a community effort to create and maintain a comprehensive and accurate reference database for EM, thermal, and flow simulations involving human models. In the future, the material database will be extended to cover additional physical and physiological properties of tissues, including ultrasound propagation and absorption, mechanical elasticity, and more.
Recent improvements of the database include:
How to reference our work:
Please use the following citation when referring to our database:
Hasgall PA, Di Gennaro F, Baumgartner C, Neufeld E, Gosselin MC, Payne D, Klingenböck A, Kuster N, “IT’IS Database for thermal and electromagnetic parameters of biological tissues,” Version 2.6, January 13th, 2015. www.itis.ethz.ch/database