[Intl_DxMedPhys] PET artifact

[Nima Kasraie]

The reason I suspect the TOF scatter correction is because of examples like this in the literature which are not that rare:

[cid:image004.png at 01DBAEA1.C7067B20]

Nima


Nima Kasraie, PhD, MSc, DABR, DABSNM
Lead Physicist, Children’s Medical Center Dallas<https://urldefense.com/v3/__https://www.childrens.com/__;!!KGKeukY!3wAqNLYT0mOMns1pXMHls6gNz5xq88Icbd4cP9Hhm8r3QMuwpR1EfrD-iB_qBDWws_72ZMybZriJ_8HPD244xQQo_dt9gvuMoEWmFop2m2C0x7T4BD1nOw$ >
Associate Professor, Department of Radiology, UT Southwestern<https://urldefense.com/v3/__https://profiles.utsouthwestern.edu/profile/187443/nima-kasraie.html__;!!KGKeukY!3wAqNLYT0mOMns1pXMHls6gNz5xq88Icbd4cP9Hhm8r3QMuwpR1EfrD-iB_qBDWws_72ZMybZriJ_8HPD244xQQo_dt9gvuMoEWmFop2m2C0x7S2AwK7aQ$ >
Phone: 214-648-7978

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces at lists.osu.edu> On Behalf Of Nima Kasraie via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, April 15, 2025 1:52 PM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu
Subject: [Intl_DxMedPhys] PET artifact

Hello group Here is a PET WB Corrected recon from a Siemens Biograph 3R: No FDG signal shows up on the ITER TOF recon at same place. A void just suddenly shows up in the abdomen not unsimilar to MRI Susceptibility artifacts we used to see as

Hello group Here is a PET WB Corrected recon from a Siemens Biograph 3R: No FDG signal shows up on the ITER TOF recon at same place. A void just suddenly shows up in the abdomen not unsimilar to MRI Susceptibility artifacts we used to see as
Hello group

Here is a PET WB Corrected recon from a Siemens Biograph 3R:

[cid:image005.png at 01DBAEA1.C7067B20]

No FDG signal shows up on the ITER TOF recon at same place. A void just suddenly shows up in the abdomen not unsimilar to MRI Susceptibility artifacts we used to see as students:

[cid:image006.png at 01DBAEA1.C7067B20]

Is this a case of mis-registration, or am I looking at Scatter as the culprit?


P.S. The raw data got erased off the scanner. So I cant do any new recons. But I’d like to know if my suspicion is correct.






Nima Kasraie, PhD, MSc, DABR (D), DABSNM (I)
Associate Professor of Radiology
Medical Physics Division

Department of Radiology
5323 Harry Hines Blvd., Dallas, Texas 75390-9071
Phone: 214-648-7978
https://urldefense.com/v3/__http://www.utsouthwestern.edu/radiology__;!!KGKeukY!3wAqNLYT0mOMns1pXMHls6gNz5xq88Icbd4cP9Hhm8r3QMuwpR1EfrD-iB_qBDWws_72ZMybZriJ_8HPD244xQQo_dt9gvuMoEWmFop2m2C0x7S46R5XUA$ <https://urldefense.com/v3/__http:/www.utsouthwestern.edu/radiology__;!!KGKeukY!3E8naH4_Z58rUacSdZFpQlPndb9RG7JCYvzBi45dRXdlJBSLL7WBLBKe2X1aDIxOB8CDKwl0XJmBCjiVURyCfLaomunGwhkdwZuxroiWwteysyMWccECeQ$>

[cid:image007.png at 01DBAEA1.C7067B20]


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