PET data set interpretation

[Heiko Gleitsmann]

Hi

I have a little problem. I know that a CT codes densities in gray scales,
where dark regions means a low density and bright regions means high
density. PET measures the emission of gamma radiation. Does the brighter
regions mean high emission and the dark ragions low/no emission?

regards heiko.

[Thomas Carlier]

Hello,

It depends on your applied LUT. If the background (outside the FOV) is
dark then the brighter regions mean a significant level of radionuclide
retention. It is the opposite if your BKG is white..

Regards

Thomas Carlier

Heiko Gleitsmann a écrit:

> Hi
>
> I have a little problem. I know that a CT codes densities in gray scales,
> where dark regions means a low density and bright regions means high
> density. PET measures the emission of gamma radiation. Does the brighter
> regions mean high emission and the dark ragions low/no emission?
>
> regards heiko.
>

[Heiko Gleitsmann]

Hi Thomas,

thanks for your help. my question is answered ;-)

regards
heiko

2006/8/17, Thomas Carlier <[hidden email]>:

>
> Hello,
>
> It depends on your applied LUT. If the background (outside the FOV) is
> dark then the brighter regions mean a significant level of radionuclide
> retention. It is the opposite if your BKG is white..
>
> Regards
>
> Thomas Carlier
>
> Heiko Gleitsmann a écrit:
>
> > Hi
> >
> > I have a little problem. I know that a CT codes densities in gray
> scales,
> > where dark regions means a low density and bright regions means high
> > density. PET measures the emission of gamma radiation. Does the brighter
> > regions mean high emission and the dark ragions low/no emission?
> >
> > regards heiko.
> >
>

--
* *********************************
* Heiko Gleitsmann c/o Kramer
* Wohlgemuthstr. 19
* 12437 Berlin

* phone: [phone]
* mobile: [phone]
* ICQ: 342985916
* *********************************