[Intl_DxMedPhys] ACR NM Image Acquisition - Discrepancy

[Mike Nimmo]

Hi Gretchen

I think the disparity is between acr flood images for submission and annual
QC. TG177 lists a table of count statistics outlining why at least 17
million counts should be acquired for annual testing, but it recommends 30
million.

Honestly I've always wondered why the ACR is so low. I always do at least
17 million counts for my annual testing.

Mike Nimmo

On Wed, Nov 5, 2025, 2:06 PM Gretchen Raterman Bell via
Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu> wrote:

> Hey everyone, My team and I noticed a discrepancy between the ACR NM QC
> manual and the "Phantom Testing" guidance page on their website: We've of
> course always done 10 million (and previously 5 million).   Is this a typo
> in the
> Hey everyone,
>
> My team and I noticed a discrepancy between the ACR NM QC manual and the
> "Phantom Testing" guidance page on their website:
>
> [image: image.png]
>
> [image: image.png]
>
> We've of course always done 10 million (and previously 5 million).  Is
> this a typo in the ACR NM QC Manual?
>
> Gretchen R. Bell, M.S., DABR
> Diagnostic Imaging Physicist
> Ochsner Medical Center
> (504)842-8506
>
>
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