[Intl_DxMedPhys] Discovery IQ PET/CT Protocol help

[Mike Nimmo]

Hi Jon,

Thanks for your reply. You are exactly right with your assessment. Further
feedback from them is that QClear and SharpIR are the scenarios where small
lesions have SUV overshoot. So they are hesitant to use those to increase
SNR.

SUV accuracies are within ACR specs for phantom testing. In my testing the
SUV values were on the lower range while still passing, which seems kind of
typical for GE scanners of this age to me.

On Fri, May 15, 2026 at 10:20 AM Nye, Jonathon via
Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu> wrote:

> Hi Mike, Have you been able to verify the SUV inaccuracies with a phantom?
> Or is this something that happens only in large patients? In my experience,
> QClear and SharpIR can cause some overshoot of SUV in small lesions but
> that was something
> Hi Mike,
>
> Have you been able to verify the SUV inaccuracies with a phantom?
>
> Or is this something that happens only in large patients?
>
> In my experience, QClear and SharpIR can cause some overshoot of SUV in
> small lesions but that was something discovered when the algorithms were
> first introduced and may be different now.
>
> Jon
>
> Jonathon A. Nye, PhD
>
> Professor, Department of Radiology and Radiological Science
>
> Medical University of South Carolina
> 99 Jonathan Lucas Drive, MSC 184
> Charleston, SC 29425
> Phone: (843)-792-4368
>
>
> ------------------------------
> *From:* Intl_dxmedphys_wd_osu_list
> <intl_dxmedphys_wd_osu_list-bounces+nyej=musc.edu at lists.osu.edu> on
> behalf of Mike Nimmo via Intl_dxmedphys_wd_osu_list <
> intl_dxmedphys_wd_osu_list at lists.osu.edu>
> *Sent:* Thursday, May 14, 2026 10:58 AM
> *To:* kenharper14 via Intl_dxmedphys_wd_osu_list <
> intl_dxmedphys_wd_osu_list at lists.osu.edu>
> *Subject:* [Intl_DxMedPhys] Discovery IQ PET/CT Protocol help
>
> Hello, I have a customer who has received delivery of a GE Discovery IQ
> PET/CT 5 ring system. Their PET radiologist is unhappy with the BGO
> system's PET image quality for medium to large patients. I was hoping
> someone out there with a 3
> Hello, I have a customer who has received delivery of a GE Discovery IQ
> PET/CT 5 ring system. Their PET radiologist is unhappy with the BGO
> system's PET image quality for medium to large patients. I was hoping
> someone out there with a 3
> Hello,
>
> I have a customer who has received delivery of a GE Discovery IQ PET/CT 5
> ring system. Their PET radiologist is unhappy with the BGO system's PET
> image quality for medium to large patients. I was hoping someone out there
> with a 3 or 5 ring PET/CT system could share their experience and maybe
> some protocol details with me to pass along.
>
> Particular concerns involve SUV overshoot when detecting small
> lesions. Also the image quality on medium to large adults is noisy and
> unsatisfactory. Some things we've been trying to improve image quality are
> below:
>
> 1. Try turning on Q.Clear with Beta values of 200, 250, and 300
> 2. Increase bed overlap from 19 slices to 35 slices.
> 3. Changing bedstop acquisition time to 200 seconds or 400 seconds per bed
> stop for medium to large patients.
> 4. Using Z-axis standard for small to medium patients and Heavy for larger
> patients.
> 5. using Sharp IR
>
> They are still struggling with image quality and SUV accuracy.
>
> Additionally the radiologist appears doubtful whether this scanner will be
> effective for imaging PSMA or Dotatate studies.
>
> I do not have much experience on this scanner platform so I would
> appreciate any assistance.
>
> Thanks,
>
> --
> Mike Nimmo
>


-- 
Mike Nimmo
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