[Intl_DxMedPhys] Case report - PET "artifact"

Wed Jun 10 13:57:27 EDT 2026

Hollywood should take a hint. Enclosed environment filled only with water and the occasional injection of radioactive material. The question is… will the result be hero or villain?

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D. SCOTT WINTER

CHIEF DIAGNOSTIC MEDICAL PHYSICIST
O:
228-865-3475<tel:228-865-3475>

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+dwinter=mhg.com at lists.osu.edu> On Behalf Of Joshua M Wilson via Intl_dxmedphys_wd_osu_list
Sent: Wednesday, June 10, 2026 9:48 AM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu; Kesner, Adam <kesnera at mskcc.org>
Subject: Re: [Intl_DxMedPhys] Case report - PET "artifact"

I'm guessing the phantom hasn't been emptied in a very long time. This is a classic "some bacteria is growing in the water and will gladly feast of some newly introduced glucose. " As you probably know, adding a couple drops of bleach
I'm guessing the phantom hasn't been emptied in a very long time. This is a classic "some bacteria is growing in the water and will gladly feast of some newly introduced glucose." As you probably know, adding a couple drops of bleach during phantom fills helps to avoid this.

Best,
Josh M. Wilson, PhD

Duke University Health System
Radiation Physicist, Clinical Imaging Physics Group
Duke University, School of Medicine
Director, Duke Imaging Physics Residency Program
Assistant Professor, Department of Radiology
Duke University, Graduate School
Faculty, Medical Physics Graduate Program
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Subject: [Intl_DxMedPhys] Case report - PET "artifact"

Here was a new one for me – last night we scanned an ACR PET phantom, three acquisitions on two different PET scanners. Interestingly we found what appears to be a unexpected clump of activity, at new location each acquisition. See pics. 

Here was a new one for me – last night we scanned an ACR PET phantom, three acquisitions on two different PET scanners.  Interestingly we found what appears to be a unexpected clump of activity, at new location each acquisition. See pics.

We used water + FDG. Our group has a theory what we saw, but happy to hear input from the community…

SCAN 1

[cid:image005.png at 01DCF8D8.AED855F0]

SCAN 2

[cid:image006.png at 01DCF8D8.AED855F0]

SCAN 3

[cid:image007.png at 01DCF8D8.AED855F0]

Adam Kesner, PhD, DABR

Deputy Service Chief of Molecular and X-Ray Imaging Physics

Attending Physicist

Department of Medical Physics
Memorial Sloan Kettering Cancer Center
1250 First Avenue, Room S-1119E (Box 84), New York, NY 10065
T 212-639-6371   F 212-717-3010
kesnera at mskcc.org<mailto:kesnera at mskcc.org>
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