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2a. QC of the CT system
• QC for the CT system have to follow European standards:
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IEC 61223-2-6 (2006)
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IEC 61223-3-5 (2004)
• CT QC measurements include
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Noise levels in uniform areas (air, water)
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Mean CT numbers (in Hounsfield units, HU)
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Uniformity
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Slice thickness
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Spatial resolution (modulation transfer function, MTF)
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Accuracy of table positioning
• In case of 4D PET/CT, quality assurance procedures for 4D are
useful.
9 | D. Thorwarth | 09/2015
ESTRO teaching course on advanced imaging techniques