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Performance measurements for the PET/CT Discovery‐600 using NEMA NU 2‐2007 standards
Author(s) -
De Ponti E.,
Morzenti S.,
Guerra L.,
Pasquali C.,
Arosio M.,
Bettinardi V.,
Crespi A.,
Gilardi M. C.,
Messa C.
Publication year - 2011
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3544655
Subject(s) - nuclear medicine , image resolution , materials science , sensitivity (control systems) , spheres , physics , optics , medicine , engineering , electronic engineering , astronomy
Purpose: The aim of this study was to assess the performance measurements of the new PET/CT system Discovery‐600 (D‐600, GEMS, Milwaukee, WI). Methods: Performance measures were obtained with the National Electrical Manufacturers Association (NEMA) NU 2‐2007 procedures. Results: The transverse (axial) spatial resolution FWHMs were 4.9 (5.6) mm and 5.6 (6.4) mm at 1 and 10 cm off axis, respectively. The sensitivity (average at 0 and 10 cm) was 9.6 cps/kBq. The scatter fraction was 36.6% (low energy threshold: 425 keV). The NEC peak rate ( k = 1 )was 75.2 kcps at 12.9 kBq/cc. The hot contrasts for 10, 13, 17, and 22 mm spheres were 41%, 51%, 62%, and 73% and the cold contrasts for 28 and 37 mm spheres were 68% and 72%. Conclusions: The Discovery‐600 has good performance for the NEMA NU 2‐2007 parameters, particularly in improved sensitivity compared to the scanners of the same Discovery family, D‐ST and D‐STE.