[Intl_DxMedPhys] MRI ACR Phantom Artifacts

[Tipnis, Sameer]

Agree with the Gibbs artifact assessment for the ACR T1. It is possible that a high-pass filter was left on. We had this issue recently and had to turn it off before getting decent images. The Site T1 seems to be affected with motion.

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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
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From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+tipnis=musc.edu at lists.osu.edu> On Behalf Of Dave Jordan via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, October 6, 2026 5:54 PM
To: High, Maynard <Maynard.High at wmchealth.org>; DxMedPhys List <intl_dxmedphys_wd_osu_list at lists.osu.edu> <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: Re: [Intl_DxMedPhys] MRI ACR Phantom Artifacts

Your ACR T1 has Gibbs artifact; normally you don't see that on those GEs, so there may be some low-pass filtering turned off in a service menu or control variable. Looks pretty normal for a Siemens or Philips to me.   Your Site T1 appears

Your ACR T1 has Gibbs artifact; normally you don't see that on those GEs, so there may be some low-pass filtering turned off in a service menu or control variable. Looks pretty normal for a Siemens or Philips to me.   Your Site T1 appears
Your ACR T1 has Gibbs artifact; normally you don't see that on those GEs, so there may be some low-pass filtering turned off in a service menu or control variable. Looks pretty normal for a Siemens or Philips to me.

Your Site T1 appears to have some vibration that is sensitive at that particular TR value. If you're not seeing it on your ACR sequences and your Site T2 that pretty much confirms it, but you can try running the Site T1 with a different TR (try, say, 1500 or 1900 ms) and confirm that it goes away.

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On Oct 6, 2026 at 4:06 PM -0400, High, Maynard 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:

MRI experienced Listers: I have come across some nasty artifacts in the ACR Phantom images for ACR accreditation images and wonder if anybody has any advice. The MRI is a 2014 GE Optima MR450W. All images were with PURE uniformity correction
MRI experienced Listers:
I have come across  some nasty artifacts in the ACR Phantom images for ACR accreditation images and wonder if anybody has any advice.

The MRI is a 2014 GE Optima MR450W.  All images were with PURE uniformity correction on and the coil was an HNS Head 12-Channel.
The phantom is the Medium sized.

First is the ACR T1 sequence:
What could be causing these rings?
<image.png>

Next is the Site FSE T1 Flair

<image.png>
Maynard High
Medical Physics: Westchester Medical Center - NYMC
914-493-1410
maynard.high at wmchealth.org<mailto:maynard.high at wmchealth.org>
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