[Intl_DxMedPhys] Dornier lithotripsy units

[Bob Kobistek]

Adam:

I’ve been using 60 cm from the II, but a colleague found a unit that fails using that reference point (not calling it IRP, since lithotripsy isn’t an interventional procedure). 60 cm is close to 22.6”, so we’re in the ballpark. So before recommending that we fail the unit, I was looking for more than just a hunch. Are your numbers based on Dornier documentation?

I had another list member post that the reference point is at the location of the treatment head. Does that fit with your numbers?

Thanks

Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™)
Medical Physicist
RJK Medical Physics, Inc.
440-463-7879

PLEASE NOTE MY NEW EMAIL ADDRESS Bob at RJKMedPhys.com<mailto:Bob at RJKMedPhys.com>

From: Adam Springer <adam at klsphysics.com>
Sent: Wednesday, April 30, 2025 12:22 PM
To: Bob Kobistek <bob at rjkmedphys.com>
Cc: intl_dxmedphys_wd_osu_list at lists.osu.edu
Subject: Re: [Intl_DxMedPhys] Dornier lithotripsy units

Hey, Bob!

Here’s what I found last time it tested one. IRP should be 22.6" from Il  = 40.5” SID - 22.6” = 17.9” from focal

-Adam


=========================
Adam C. Springer, MS, DABR®
Medical Physicist
KLS Physics Group, LLC
124 Killgore Rd
Ruston, LA 71270
318-272-8292


On Apr 30, 2025, at 07:02, Bob Kobistek 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:

Can anyone share the location of the air kerma reference point on a Dornier mobile lithotripsy unit? Thanks. Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™) Medical Physicist RJK Medical Physics, Inc. 440-463-7879 PLEASE NOTE MY NEW EMAIL ADDRESS
Can anyone share the location of the air kerma reference point on a Dornier mobile lithotripsy unit?

Thanks.


Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™)
Medical Physicist
RJK Medical Physics, Inc.
440-463-7879

PLEASE NOTE MY NEW EMAIL ADDRESS Bob at RJKMedPhys.com<mailto:Bob at RJKMedPhys.com>
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