Green's Function normalization & unitinmm question

[Angel]

Hi Dr Fang,

I recently started using MCX and had a few fundamental questions. 

You mentioned that you are trying to match the output of a Green's function when normalising. Can you elaborate a bit more on that? Also if I wanted to change the source power, would I simply multiply my fluence rate by the desired constant?

How does changing cfg.unitinmm affect the optical properties? I am asking with regards to this thread.

Kind regards,

Angelos

[Qianqian Fang]

see my below replies

On 5/18/24 12:23, Angel wrote:

Hi Dr Fang,

I recently started using MCX and had a few fundamental questions. 

You mentioned that you are trying to match the output of a Green's function when normalising. Can you elaborate a bit more on that? Also if I wanted to change the source power, would I simply multiply my fluence rate by the desired constant?

please check out the below mailing list posts on output data unit, normalization and more

https://groups.google.com/g/mcx-users/c/N55J79w9FYY/m/D3IcSTfqBQAJ

https://groups.google.com/g/mcx-users/c/sbtDCbuRh90/m/KVKShOebAQAJ

https://groups.google.com/g/mcx-users/c/tQEw5jO1nWA/m/mcZIapwGAAAJ

https://groups.google.com/g/mcx-users/c/dH4OlY1NG6M/m/qGusJOakBgAJ

How does changing cfg.unitinmm affect the optical properties? I am asking with regards to this thread.

the effect of setting cfg.unitinmm is actually achieved in mcx/mmc by scaling mua/mus optical properties, but it is done internally - users does not need to do this manually. that's why the mua/mus properties in cfg.prop is always in 1/mm unit

https://github.com/fangq/mcx/blob/v2024.2/src/mcx_utils.c#L1550-L1559

Kind regards,

Angelos

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