What is PEGS4 Material "RMISW" ?

[barghashr]

Hello, I've been trying to find out if PEGS files have a predefined material for trabecular bone or bone marrow. I couldn't find one, but I did find a material called "RMISW" that has calcium in its components, so I'm curious about what that material is. I have attached a screenshot of the material from the "material.dat" file.

Thank you.

[rtownson]

There are a few bone variants provided as density correction files, in HEN_HOUSE/pegs4/density/compounds. Though I generally recommend that you create your own material to ensure you can verify its correctness, following these instructions.

@blakewalters do you know the origin of this material?

[ojalaj]

@rtownson Aren't most of the materials based on ICRU Report 44?

[rtownson]

Thanks @ojalaj, I believe that is correct.

[nexustowers]

Could this be a commercial brand of solid water?

[crcrewso]

@nexustowers I think you're right. I found an article from D I Thwaites

I'm going to guess that it's the brown Gammex (now Sun Nuclear).

[ftessier]

@blakewalters, can you add a comment line for each medium in material.dat, to spell out what each material is? Or else, please post an issue as a reminder.

[mainegra]

ChatGPT:
RMI stands for Radiation Measurement Incorporated. It was a company that specialized in the development and production of materials and tools for radiation therapy and dosimetry. Their Solid Water products, designed to simulate the radiological properties of water, are widely used in medical physics for dosimetry and quality assurance in radiation therapy.
Sun Nuclear Corporation, which acquired Gammex in 2014, now manufactures and commercializes Solid Water® HE phantoms, which might be a rebranding of RMI Solid Water.