Systmatic method of formulating liquid phantoms with a given elemental composition and density

Area of Science:

• Radiation physics and dosimetry
• Biophysical modeling
• Materials science

Background:

• Accurate tissue-equivalent materials are crucial for radiation dosimetry and biological research.
• Existing methods for formulating these mixtures can be complex and limited in scope.
• The International Commission on Radiological Protection (ICRP) Standard Man and National Bureau of Standards (NBS) Handbook 85 provide reference compositions.

Purpose of the Study:

• To develop a general and versatile method for formulating tissue-equivalent liquid mixtures.
• To achieve specific chemical compositions and densities using readily available compounds.
• To demonstrate the method's applicability for simulating ICRP Standard Man and mammalian muscle.

Main Methods:

• Linear programming technique is employed for mixture formulation.
• Utilizes eight common compounds to achieve desired atomic compositions and densities.
• Covers a density range from 1.0 to 1.13 g/cm³.
• Method is adaptable for incorporating other mixture parameters.

Main Results:

• Successfully formulated tissue-equivalent liquid mixtures with target atomic compositions.
• Achieved precise control over mixture density within the specified range.
• Demonstrated the capability to replicate the composition of ICRP Standard Man and mammalian muscle.
• The method provides a systematic approach to mixture design.

Conclusions:

• The described linear programming method offers a robust and generalizable approach to formulating tissue-equivalent liquid mixtures.
• This technique facilitates the creation of materials with tailored properties for radiation research and other applications.
• The method's flexibility allows for the inclusion of additional parameters, enhancing its utility.