[Gate-users] Standard HU ranges for Abdomen and Brain CT images

[Maria Inês Ribeiro]

Hi Atiq,

I am doing something similar for dosimetry purposes.
>From what I have read, the HU depends on the CT scanner that acquired the
images. For dosimetry, it is not necessary to produce such small bins (as
in your example) because there is not a good relationship between CT unit
and tissue composition in the range of soft tissues and dose does not
differ much within them.

I would let the experts add more to what I said.

Best,

Inês

Atiq Ur Rahman <atiqchep at gmail.com> escreveu no dia quinta, 8/04/2021 à(s)
08:47:

> Dear  experts,
> I am trying to read the CT images in Gate. I am successful to read the CT
> Image but I am not sure about the precise organ density ranges in HU units
> for Abdomen and Brain CT images. Right now, I am trying to implement it
> from different online research papers and websites but that may not be a
> standard Benchmark.
> For example, I am using this file for Abdomen CT:
> -1024  -600 Air
> -600   -120   Adipose
> -120   -90    TissueEquivalent
> -90     1     Blood
> 1      10     Mucus
> 10     20     Intestine
> 20     30     Kidney
> 30    40      Pancreas
> 40     50     Spleen
> 50     200    Liver
> 200    400    SpangyBone
> 400   3072  SpineBone
>  Can anyone point me to some standard material conversion files or
> resources with HU ranges?
> Looking forward to any feedback.
> Regards
> Atiq
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