Greek-Ελληνικά
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Quality Assurance
Quality Assurance programs have the aim of
ensuring that the performance of the equipment and of the department in general is
maintained at the best of its capabilities.Quality Assurance programs, protocols and
various phantoms for their application have have been set by various organizations(NEMA,
IEC) so that every Department can organize its own program according to its needs and
workload.
The QA program that is followed in our department has proven to be
efficient in keeping the instrumentation working properly and preventing any deterioration
Spatial Resolution |
Uniformity |
Energy Resolution |
Count Rate Performance |
Centre of Rotation |
Acquisition Check |
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Non uniformity image Co57 filled flood source. Wrong energy window 20% in
Tc99m photopeak [140 KeV] instead of energy window at Co57 photopeak [122KeV] as well as a
peripheral photomultiplier defect
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Non
Uniformity check by Co57 Flood Source. Good Homogeneity except one peripheral
photomultiplier defect |
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Bar Phantom Test of overall system Spatial Resolution. LEGP Collimator in
use
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Grid
Phantom line sources filled by Co57. Linearity and Barrel Effect check |
Maria Lyra Georgosopoulou
Assoc. Prof. Medical Physicist
University of Athens
email: mlyra@medimaging.gr
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