caa a22 4500 445304421 CHVBK 20180317142608.0 cr unu---uuuuu 170323e20100601xx s 000 0 eng 10.1007/s13246-010-0016-6 doi (NATIONALLICENCE)springer-10.1007/s13246-010-0016-6 NEMA NU 2-2001 performance testing of a Philips Gemini GXL PET/CT scanner [Elektronische Daten] [Chithradevi Sathiakumar, Seu Som, Stefan Eberl, Peter Lin] Post installation acceptance testing is vital to demonstrate that the equipment meets the vendor's specification and is suitable for clinical studies. The test procedures described in the NEMA NU 2-2001 document form the basis of vendor performance specifications of PET scanners and hence are also appropriate for acceptance testing. Initial installation performance tests of the Philips Gemini GXL PET/CT scanner installed at Liverpool Hospital revealed that the peak noise equivalent count rate (NECR) measurement of 57.5 kcps was substantially lower than the specification of 70 kcps and the scatter fraction of 38.5% was 10% higher than the specification of ≤35%. These performance parameters potentially impact on clinical image quality and hence the deviations were considered unacceptable. The performance issues were addressed by the vendor through a hardware upgrade and optimisation of the energy window by increasing the lower discriminator value from 408.8 to 434.4keV. Several repeat performance measurements taken from post-optimisation demonstrated improvement in peak NECR to 67 kcps with delayed window randoms subtraction "on” and 72kcps with delayed window randoms subtraction "off”. Scatter fraction taken from post upgrade and optimisation improved to an average of 33%, which is well within specification of <35%. All other performance tests (resolution, sensitivity, accuracy of corrections) were within specifications both prior and post-optimisation changes. This experience demonstrates the importance of equipment acceptance testing prior to clinical use so that deficiencies in performance can be addressed before the equipment is placed in clinical service. Australasian College of Physical Scientists and Engineers in Medicine, 2010 Positron emission tomography/computed tomography nationallicence National Electrical Manufacturers Standards nationallicence Acceptance testing nationallicence Performance measurement nationallicence Sathiakumar Chithradevi Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut Som Seu Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut Eberl Stefan Department of PET and Nuclear Medicine, Royal Prince Alfred Hospital, Camperdown, NSW, Australia aut Lin Peter Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut Australasian Physical & Engineering Sciences in Medicine Springer Netherlands 33/2(2010-06-01), 199-209 0158-9938 33:2<199 2010 33 13246 https://doi.org/10.1007/s13246-010-0016-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13246-010-0016-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sathiakumar Chithradevi Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut NATIONALLICENCE 700 1- Som Seu Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut NATIONALLICENCE 700 1- Eberl Stefan Department of PET and Nuclear Medicine, Royal Prince Alfred Hospital, Camperdown, NSW, Australia aut NATIONALLICENCE 700 1- Lin Peter Department of Nuclear Medicine and PET, Liverpool Hospital, 2170, Liverpool, NSW, Australia aut NATIONALLICENCE 773 0- Australasian Physical & Engineering Sciences in Medicine Springer Netherlands 33/2(2010-06-01), 199-209 0158-9938 33:2<199 2010 33 13246 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer