[Intl_DxMedPhys] RE_Siemens c.cam – Jaszczak Phantom Positioning

[Tipnis, Sameer]

The other adjustment that I do is reduce the mag to 0.66, else it often cuts off part of the phantom.

_________________________________________________

Sameer Tipnis, PhD, DABR, FAAPM
Professor of Radiology & Chief, Division of Medical Physics
Program Director, Diagnostic Medical Physics Residency
Dept. of Radiology and Radiological Sciences
Medical University of South Carolina
96 Jonathan Lucas Street, MSC 323
Charleston, SC 29425

Phone: (843)-792-3833
Fax:     (843)-792-2642
_________________________________________________


From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+tipnis=musc.edu at lists.osu.edu> On Behalf Of Nicole Ranger via Intl_dxmedphys_wd_osu_list
Sent: Thursday, September 17, 2026 11:57 AM
To: Imendra Ranatunge <ranatunge at gmail.com>
Cc: kenharper14 via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: Re: [Intl_DxMedPhys] RE_Siemens c.cam – Jaszczak Phantom Positioning

Imendra, No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick. I typically place the phantom on a Chuck with the absorbent side up as a precaution

Imendra, No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick. I typically place the phantom on a Chuck with the absorbent side up as a precaution
Imendra,


No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick.  I typically place the phantom on a Chuck with the absorbent side up as a precaution and if you roll the edges up to the phantom tightly that should be adequate to ensure no movement but you could always add tape being sure that it does not interfere with movement of the table axially, in/out. I believe that the ACR now permits you to use auto-contouring so the collimator position is optimized at each angle. (If you use a circular orbit you have to center the phantom carefully to minimize collimator distance.) whichever option you use, you should ensure that the phantom is centered in the FOV.  I like to position the phantom so that the largest spheres are at the bottom but others may have a different positioning preference.


Nicole R.




Sent from my iPhone


On Sep 17, 2026, at 12:09 PM, Imendra Ranatunge 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:

Hi All, I have a question regarding performing a Jaszczak phantom test on a Siemens c. cam system. Are there any special instructions or recommendations for positioning the Jaszczak phantom on the c. cam? My understanding is that the phantom may

Hi All,

I have a question regarding performing a Jaszczak phantom test on a Siemens c.cam system.

Are there any special instructions or recommendations for positioning the Jaszczak phantom on the c.cam? My understanding is that the phantom may need to be tilted due to the geometry of the system.

Is there a recommended setup or an easy, practical way to position and secure the phantom for the acquisition? I appreciate any guidance or experience you can share.

Thank you!

Imendra
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260917/20bfeb17/attachment.html>