[Gate-users] SENSITIVITY

[Albert Grace Lieu]

Hi Phy phy,

Before drawing the axial sensitivity of a PET system, you need to know when
the axial sensitivity is calculated. There may be various methods to
calculate that, but here I am only speaking of the method I used in my
recent NEMA sensitivity measurement. Per NEMA description for sensitivity
measurement, the dose is very low and you may think of there all collection
lors are trues (you definitely can do processing to remove randoms and
scatters, but they don't count for a lot ). Then I used single-slice
rebinning method to determine the location of each lor and assign it to its
corresponding axial slice. I used python to conduct this analysis and if
you also use it then numpy.histogram is the function that you need to get
your data ready before plotting.

Good luck,
Albert


On Sun, Jul 19, 2020 at 4:26 AM phy phy <nuclear99physics at gmail.com> wrote:

> Hi Gate users
> I am a new user of Gate.
> What phantom and source should be used to draw the axial sensitivity
> diagram?
> I simulated a clinical PET and calculated the sensitivity in the center
> using five aluminum coatings using the NEMA nu2 2018.
>  Now how do I draw the axial sensitivity diagram?
>
> Please guide me.
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> Gate-users at lists.opengatecollaboration.org
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