[Intl_DxMedPhys] [EXTERNAL] Re: Siemens X.Cite

[Joel Nace]

I just use the Beam Profile test in service mode.  You must get a temporary service key ahead of time, but it is fully automated for multiple collimator settings.  You just have to measure the blackened GAF film, put in the results, and it spits out if it passes or not along with the tolerances.

Joel R. Nace, MS, DABR
Medical Physicist
Krueger-Gilbert Health Physics, LLC
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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+jnace=kruegergilbert.com at lists.osu.edu> On Behalf Of Szczykutowicz, Timothy P via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, February 11, 2025 1:46 PM
To: Goetz,Danielle <Danielle.M.Goetz at SanfordHealth.org>; intl_dxmedphys_wd_osu_list at lists.osu.edu
Subject: Re: [Intl_DxMedPhys] [EXTERNAL] Re: Siemens X.Cite

I tested one last summer, I measured 24 mm for the 19. 2 mm nominal mode. I used one of the default siemens abdomen sequential protocols. Set to one bed position. Ours didn’t do 38. 4 mm (on rails installation). I found the vendor specs as noted
I tested one last summer, I measured 24 mm for the 19.2 mm nominal mode. I used one of the default siemens abdomen sequential protocols. Set to one bed position. Ours didn’t do 38.4 mm (on rails installation). I found the vendor specs as noted below from my report

“Nominal blackening width from user manual page 30 in chapter 2 of Dose Information in manual “Dosimetry
and imaging performance report” used to get specs of 2x1 collimation is 3.5 mm black film }1 mm, 12x1.2 mm
collimation is 19.8 black width } 1.5 mm, 16x1.2 collimation is 25 mm black width }2 mm.”

Were the other collimations also much larger than you would have liked? Did the reconstructed image range for the single exposure seem to match using only a 38.4 mm coverage? I don’t think there is some odd coverage like 50 something mm to explain your measurement, they list it as a max 128 slice scanner. That is a pretty large error though, hard to believe the local FE could have it mis calibrated so much.

-stick

Timothy P. Szczykutowicz, Ph.D., DABR
Associate Professor
Departments of Radiology, Medical Physics and BME
University of Wisconsin Madison
Cell# 1-716-560-7751<tel:(716)%20560-7751>
Office# 1-608-263-5729
he/him/his

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list-bounces at lists.osu.edu>> On Behalf Of Goetz, Danielle via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, February 11, 2025 12:30 PM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: [Intl_DxMedPhys] [EXTERNAL] Re: Siemens X.Cite


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Good afternoon. Is there a trick that anyone has found when testing beam width on the Siemens X. Cite CT scanners? These systems are not as user friendly as others and you are limited to factor collimation settings. The collimation 64x. 6 that

Good afternoon.

Is there a trick that anyone has found when testing beam width on the Siemens X.Cite CT scanners?

These systems are not as user friendly as others and you are limited to factor collimation settings.  The collimation 64x.6 that I tested should have given me approx. 38.4mm and I measured 61mm.  I know I need to pick a protocol without z-sharp, but has anyone else come across this and what did you find/ use for testing?


Thanks in advance.

DG

Danielle Goetz, MS
Medical Physicist
Sanford Health Bismarck
Direct: (701) 323-8722
Mobile: (701) 527-2835
Route: #20739
Danielle.M.Goetz at sanfordhealth.org<mailto:Danielle.M.Goetz at sanfordhealth.org>
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