[Intl_DxMedPhys] [External] GE MyoSPECT questions

[Galt, James R.]

I have seen this before on a GE D570 CZT camera. Each detector module is a 2x2 array of detectors. You have lost a detector.

I think it requires service support.

I believe in my case the service engineers reloaded corrections etc, rather than replacing a module. It has happened once in over 10 years of use.

James R. Galt, Ph.D.
Director of Nuclear Medicine Physics
Professor, Department of Radiology and Imaging Sciences
Emory University School of Medicine
1364 Clifton Road
Atlanta, Georgia 30322
Phone: 404.712.7896
Fax: 404.712.7435
email: James.Galt at emory.edu<https://urldefense.com/v3/__https://ehcowa.emory.edu/owa/redir.aspx?C=2f26e93561f14cc098e285704b863f52&URL=mailto*3aJames_Galt*40emoryhealthcare.org__;JSU!!KGKeukY!3QdAojqhqF15eIHb1SdqlKas9ZJh0K0yqQZxngvc7EJX27kCexrZxgvcIZiBBDNdS2R_Rmba5GOmha8MP6wcCyj5KK0ECLzgcdpFCQ$ >
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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+jgalt=emory.edu at lists.osu.edu> on behalf of Palmer, Matthew R. (BIDMC - Radiology) via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Sent: Thursday, October 16, 2025 1:44 PM
To: Adam Springer via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: [External] [Intl_DxMedPhys] GE MyoSPECT questions

I acquired a small Jaszczak phantom on a GE MyoSPECT camera and the reconstructed images exhibit severe streaking. One of the camera "projection" images seems to have a missing quadrant. I've attached that image. So my questions are: 
I acquired a small Jaszczak phantom on a GE MyoSPECT camera and the reconstructed images exhibit severe streaking.

One of the camera "projection" images seems to have a missing quadrant.  I've attached that image.

So my questions are:

  *
has anyone seen this type of failure before?
  *
What's going on here - what causes ¼ of the image to be zeroed out?
  *
Any suggestions on how to acquire a good quality Jaszczak?  My setup is really cobbled together.  Is there a phantom acquisition mode I can access somehow or is there a jig available for this camera?

Matt Palmer



Matthew R. Palmer, PhD, DABR
Director, Medical Imaging Physics, Department of Radiology

Assistant Professor, Harvard Medical School
Beth Israel Deaconess Medical Center
330 Brookline Avenue
Boston, MA 02215
office: 617-667-0176 fax: 617-667-2770
mobile: 617-794-1736 pager: 617-632-7243 #32214



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