[Intl_DxMedPhys] [EXTERNAL] DECT gout studies

[Hoy,Andrew]

I know Stephanie asked for offline feedback, but I would love to hear from anyone who feels good about their gout protocols/workflow on the GE Apex.
It has been a few years now since we tried implementing dual energy gout imaging, but we never got to a point where our radiologists felt confident in identifying tophi.  We had GE in house to help set things up and had several remote meetings to go over our scans and tweak settings but ultimately abandoned the project.  We could never dial in cutoffs to get both the sensitivity and specificity to make it worthwhile.
At the time (I haven’t looked in a few years not), all the literature on dual energy gout imaging was done on a dual tube system.  My conclusion was that GE’s dual energy solution is technically really cool, but it just doesn’t get the x-ray spectra separation that is needed for reliable material decomposition.  Fast kV switching simply isn’t the same as two tubes with different kVp and filters.
I am certainly not the expert in CT physics and would love to hear what others who are happy with their outcomes are doing.
Thank you,
Andrew


Andrew R. Hoy, PhD, DABR

Radiation Safety Officer

Diagnostic Medical Physicist

Office (605) 312-1429

Cell: (480) 329-5552

Sanford USD Medical Center

Sioux Falls, SD




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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces at lists.osu.edu> on behalf of Stephanie M. Leon via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Sent: Thursday, June 11, 2026 8:38 AM
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Subject: [EXTERNAL] [Intl_DxMedPhys] DECT gout studies

Hello all, If anyone has experience with DECT processing of gout studies on a GE Apex, can you please contact me off-list? I’m trying to figure out settings and workflow. Thanks, Stephanie M. Leon, PhD, DABR, DABSNM Chief of Diagnostic

Hello all,



If anyone has experience with DECT processing of gout studies on a GE Apex, can you please contact me off-list? I’m trying to figure out settings and workflow.



Thanks,





Stephanie M. Leon, PhD, DABR, DABSNM

Chief of Diagnostic Medical Physics

Associate Professor of Radiology


Tel (603) 650-3796
Dartmouth-Health.org

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