[Intl_DxMedPhys] [EXTERNAL] Re: Barco 32 MP mammo monitor

Mon Apr 7 19:36:52 EDT 2025

Hello Jerry and Doug,

Needless to say, I have an obvious bias in this discussion topic yet can contribute some background context.

The ACR-AAPM-SIIM point, that details cannot be created, is entirely correct, so the advantage with smaller source matrix images is dependent on people using multiple viewports to review many views at once as noted by Jeff.  And people do want to review many views at once to facilitate comparisons using both small and large-matrix images.

The pixel pitch is reduced to come closer to the limit of human acuity, and because this allows images from modern DX detectors to be displayed such that their highest frequency components result in visible modulation.  The human eye is wonderfully complex, and uses various mechanisms to generate hyperacuity, especially the Vernier sensitivity generated in our brain from the line-like elements present in medical imaging.

Similarly, the high brightness of modern displays enables more acuity than was possible to achieve in the early years of digital medical imaging.  Our eyes work better with more light.  Some conclusions about what we can/cannot see (resolution, shades of gray, etc.) were drawn when displays were 1/5th as bright as they are today.  These conclusions may no longer be as valid now as they were in 1996 when people were introducing 5MP grayscale CRT displays.

While we have very positive qualitative feedback on the smoothness and perception of margins, we are always interested in pursuing more quantitative perception measurements with the clinical and medical physicist community.

Please feel free to reach out to me if you would like to get more deeply into the technical aspects of this display system.

Regards,
Albert

Albert Xthona

Product Manager and Portland Site Leader
T +1 503 748 6060
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Visioneering a bright tomorrow
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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces at lists.osu.edu> On Behalf Of Jerry Thomas via Intl_dxmedphys_wd_osu_list
Sent: Monday, 7 April, 2025 13:26
To: Douglas Pfeiffer <xraydoug at me.com>
Cc: intl_dxmedphys_wd_osu_list at lists.osu.edu
Subject: Re: [Intl_DxMedPhys] [EXTERNAL] Re: Barco 32 MP mammo monitor

This message was sent securely using Zix® There is a limit as to how small a pixel can be before the eye/brain fuses them into a single pixel. When I did some early work with the IBM Sarnoff Labs in NY, I seem to remember that the limit
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There is a limit as to how small a pixel can be before the eye/brain fuses them into a single pixel.  When I did some early work with the IBM Sarnoff Labs in NY, I seem to remember that the limit was on the order of 100 um.  I had them make a special display for me that has 125 um pixels -- GREAT images.  I know Albert Xthona well and am sure that he is aware of this physiological fact -- so if they have a 103 um pixel the eye/brain is not fuzing the pixels -- but much smaller and that will happen.  The images should be EXQUISITE!! with the smaller DEL

Jerry

Jerry Thomas, MS, FAAPM, DABR, CHP, DABSNM
Diagnostic Medical Physicist / Radiation Safety Officer
Ascension Via Christi Hospitals Wichita
Wichita, KS  67214

Phone:  316-268-5958  (office)
            240-447-1014  (cell)

On Fri, Apr 4, 2025 at 11:44 AM Douglas Pfeiffer via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>> wrote:
I’d have to think it through more (thinking is hard on a Friday), but one benefit of the smaller pixel size is that it would possible to see a larger field of view at full resolution. 5 MP makes that possible with current systems, but it’s possible,
I’d have to think it through more (thinking is hard on a Friday), but one benefit of the smaller pixel size is that it would possible to see a larger field of view at full resolution. 5 MP makes that possible with current systems, but it’s possible, I guess, that future systems could possibly have smaller pixels to require the monitor to be equivalent.

Best regards,
Doug

Douglas Pfeiffer, MS, DABR FACR, FAAPM
Medical Physicist, Radiation Safety Officer
Boulder Community Health
xraydoug at me.com<mailto:xraydoug at me.com>
303.415.7515

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The opinions expressed in this message are the product of the gray and white matter loitering in my cranium. I speak for myself and no one else, unless I say otherwise.

On Apr 4, 2025, at 10:22 AM, Jeff Frimeth via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>> wrote:

Not me and I don't believe these are Health Canada (our FDA) approved.

The pixel size is 103 um, where as say 5 MP or even 12 MP all have about 150 um instead. I don't believe this decrease in pixel size (pitch) is really that advantageous. Quoting the ACR-AAPM-SIIM "The finer pitch will not improve the spatial resolution of the underlying image data, which is determined by the imaging system, and the benefits over a pixel pitch of 0.200 mm are negligible at a viewing distance of 60 cm because of the limitations of the human visual system discussed earlier. However, the larger array size allows for viewing a larger region of the mammography image at the native, or full, resolution (ie, 100% zoom, no interpolation)."

The only real potential reasons I could see why a rad would want a 32 MP display is to buy something fancy or potentially view many sequences/images at a time (like in neuro or ENT imaging).

My two cents.

Jeff Frimeth, M.Sc., MCCPM, CIIP, MRSO (MRSCTM), MRSE (MRSCTM), CDIP
President & Chief Medical Physicist
JF Medical Physics Inc.
P: (416) 779-9674
E: jf at jfmedphys.com<mailto:jf at jfmedphys.com>
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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+jf=jfmedphys.com at lists.osu.edu<mailto:jfmedphys.com at lists.osu.edu>> on behalf of Travis White via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>>
Sent: April 4, 2025 9:25 AM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu> <intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>>
Subject: [Intl_DxMedPhys] Barco 32 MP mammo monitor

We recently had a Barco MDMC-12133 12 MP mammo monitor die.  Barco provided a quote for a new MDMC-32133 32 MP monitor as a replacement.
Coronis OneLook (MDMC-32133) - Breast imaging displays - Barco<https://urldefense.com/v3/__https://www.barco.com/en/product/coronis-onelook-mdmc-32133__;!!KGKeukY!1F8q0GbgwPfa48bPuCNIO6XrLB49rJCBro01N9fR8Mtm7abnsH4FqtpM7FQsLSiY1o4FMj3vuLaVg3yoUGEGXRSHabsZeo266i6Ij-RxfIHQYf4LQw$>

I haven’t been able to find any references to monitors with this pixel size – experience, advantages, etc.

Does anyone have experience with the 32 MP monitors in mammography?

Thanks.

Travis White, MS, DABR
Diagnostic Medical Physicist
Radiation Safety Officer – Upstate

Prisma Health
701 Grove Road
Greenville, SC 29605
864-455-3720 (office)

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Inspire health. Serve with compassion. Be the difference.

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