[Intl_DxMedPhys] Case report - PET "artifact"

[Joseph Giardina]

Adam

Ive certainly had this happen…….as you probably know ……its from the 2 screws that hold the rods section to the bottom of the phantom.

In NM Phantoms ,  definitely stay away from sestamibi, Myoview , and Sulfur colloid doses…….as these may clumb to the spheres , rods, and cause non-uniformity.
If you are “forced” to use one of the above  radiopharms……..I would recommend adding it outside of the phantom in a large volume , and then add it into the phantom

Joe
Joseph Giardina, MS
Petrone Associates
NYC


From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+jgiardina=petroneassoc.com at lists.osu.edu> On Behalf Of Kesner, Adam via Intl_dxmedphys_wd_osu_list
Sent: Wednesday, June 10, 2026 9:15 AM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu
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:image001.png at 01DCF8BE.D7E6BCD0]



SCAN 2
[cid:image002.png at 01DCF8BE.D7E6BCD0]


SCAN 3
[cid:image003.png at 01DCF8BE.D7E6BCD0]



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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