Standard Performance Measurements of GE AdvanceTM Positron Emission Tomography / 대한핵의학회잡지
Korean Journal of Nuclear Medicine
; : 100-112, 2001.
Article
em Ko
| WPRIM
| ID: wpr-92809
Biblioteca responsável:
WPRO
ABSTRACT
PURPOSE:
The purpose of this study was to establish optimal imaging acquisition conditions for the GE Advance(TM) PET imaging system by performing the acceptance tests designed by National Electrical Manufacturers Association (NEMA) protocol and General Electric Medical Systems (GEMS) test procedures. MATERIALS ANDMETHODS:
Performance tests were carried out with 18FDG radioactivity source and phantoms by using a standard acquisition mode. Transaxial resolution and scatter fraction tests were performed with a line source and axial resolution with a point source, respectively. A cylindrical phantom made of polymethylmethacrylate (PMMA) was used to measure sensitivity, count rate losses and randoms, uniformity correction, and attenuation inserts were added to measure remaining tests. The test results were acquired in a diagnostic acquisition mode and analyzed mainly on high sensitivity mode.RESULTS:
Transaxial resolution and axial resolution were measured as average of 4.65 mm and 3.98 mm at 0 cm, and 6.02 mm and 6.71 mm at 20 cm on high sensitivity mode, respectively. Average scatter fraction was 9.87%, and sensitivity was 225.8 kcps/micronCi/cc of trues. Activity at 50% deadtime was 4.6 Ci/cc, and the error of count rate correction at that activity was from 1.49% to 3.83%. Average nonuniformity for total slice was 8.37%. The accuracy of scatter correction was -0.95%. The accuracies of attenuation correction were 5.68% for air, 0.04% for water and -6.51% for polytetrafluoroethylene (PTFE).CONCLUSION:
The results satisfied most acceptance criteria, indicating that the GE AdvanceTM PET system can be optimally used for clinical applications.Palavras-chave
Texto completo:
1
Índice:
WPRIM
Assunto principal:
Politetrafluoretileno
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Radioatividade
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Água
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Polimetil Metacrilato
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Fluordesoxiglucose F18
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Tomografia por Emissão de Pósitrons
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Elétrons
Tipo de estudo:
Guideline
Idioma:
Ko
Revista:
Korean Journal of Nuclear Medicine
Ano de publicação:
2001
Tipo de documento:
Article