[Intl_DxMedPhys] Siemens go.Top QC

[Bob Kobistek]

Hi folks.

I have a site that's running the daily automated QC on a Siemens go.Top, and I'm trying to figure out if it meets the requirements of the ACR QC manual and the Ohio Department of Health regulations. Right now, all they're doing is running the QC, which gives them a pass/fail indication, and then they're looking at images to check for artifacts, but I think there may be some missing required QC.

Among the DICOM images are two reports, one is called Quality Constancy Noise, and the other is Quality Constancy Homogeneity. For starters, neither one lists the action levels, only numbers. The implication is that if you get a passing result, all measurements are within the manufacturer-specified range, but what is that range? Does anybody know? What's the maximum noise value? What's the maximum homogeneity value?

Next question: ODH and ACR require verification of CT number calibration. The Siemens automated software measures the HU of water at several kV values, but there is no report or any indication that it is checking that the HU H2O is within action limits. The HU values are only reported in the homogeneity and noise tests.  Does anyone know if the software is checking HU values?

Thanks.


Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC(tm))
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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