Performance measurements for the PET/CT Discovery-600 using NEMA NU 2-2007 standards

E. De Ponti, S. Morzenti, L. Guerra, C. Pasquali, M. Arosio, V. Bettinardi, A. Crespi, M. C. Gilardi, C. Messa

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)968-974
Number of pages7
JournalMedical Physics
Issue number2
Publication statusPublished - Feb 2011


  • Discovery-600
  • NEMA NU 2-2007
  • PET/CT

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'Performance measurements for the PET/CT Discovery-600 using NEMA NU 2-2007 standards'. Together they form a unique fingerprint.

Cite this