[Intl_DxMedPhys] Digital mammo and EM interference

[Daniel Vergara]

Hi Harry,

I recall a talk during the Henderson, NV Spring Clinical meeting in which
the speaker (don't recall who) discussed RF interference in Mammography.
They have the room the tin foil hat treatment: wrapped the walls in copper
RF shielding. I think there is also a RF paint available, which might be
more practical.
Many years ago I dealt with RF interference to a suite of ultrasound units,
which caused random twinkle artifacts in color Doppler and localized
speckle variation in b-mode. We had a RF consultant investigate, but we
never were able to  identify the source of the RF.

Best of luck,
Daniel Vergara

On Wed, Oct 7, 2026, 1:32 PM xuandong zhao via Intl_dxmedphys_wd_osu_list <
intl_dxmedphys_wd_osu_list at lists.osu.edu> wrote:

> We had it earlier this year with two of the rooms in a new hospital but
> neither hologic nor hospital could figured it out what caused the problem,
> so with the two rooms that has the issue, one we have to vacant the room
> and switch to another,
> We had it earlier this year with two of the rooms in a new hospital but
> neither hologic nor hospital could figured it out what caused the problem,
> so with the two rooms that has the issue, one we have to vacant the room
> and switch to another, and the other we moved the units from one corner to
> the opposite corner.
>
> Hologic did suspect that the (main) power cable runs through the ceiling
> of the vacated room caused the problem but hospital can’t relocate the line
> to prove it
>
>
>
> On Wed, Oct 7, 2026 at 3:29 PM Harry Ingleby via
> Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
> wrote:
>
>> Hi all, We have recently started having conversations with our mammo
>> vendor about the possibility of artifacts due to EM interference. We
>> weren’t aware of this as a potential issue previously, and I was a bit
>> surprised to find that there was
>> Hi all,
>>
>> We have recently started having conversations with our mammo vendor about
>> the possibility of artifacts due to EM interference. We weren’t aware of
>> this as a potential issue previously, and I was a bit surprised to find
>> that there was a paper in JACMP on this back in 2018:
>>
>> https://urldefense.com/v3/__https://aapm.onlinelibrary.wiley.com/doi/10.1002/acm2.12366__;!!KGKeukY!3odsZBGsDXkpbfpvEeWPRja3xLVIytdIus85udbILNivF7y0cw028iLLLVZHNpvJIpmtBjcKpTyXtN1OLjbiI-5vHFFY-fSImP59XaFu$ 
>> <https://urldefense.com/v3/__https://aapm.onlinelibrary.wiley.com/doi/10.1002/acm2.12366__;!!KGKeukY!x0k6fetUg4nwped_NBeDECbrJY5bjZYwFbjz7ilsrqv1-qIlsSLgoaR243YB7HQWIWZx7euDSOqci_En947XdbSbPcYTD8v1iQ4YAPVcdhSLtRE$>
>>
>> Has anyone experienced issues with mammo system performance due to EM
>> interference? The communications we have received from the vendor to date
>> have been pretty vague in terms of what types of issues might arise and
>> what the risks of such issues occurring actually are. I’d be happy to hear
>> about any experiences in the community - offline replies welcome if that is
>> easier.
>>
>> Thanks,
>> Harry
>>
>> --
>> Harry Ingleby, PhD, MCCPM
>> Imaging Physicist
>> CancerCare Manitoba
>> hingleby at cancercare.mb.ca
>>
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