Dual imaging with both contrast enhanced CT scan and PET-CT is recommended for evaluation of lymphoma. We compared the performance in identification and size measurements of involved lymph nodes in FDG-Avid lymphomas on the low dose non-contrast enhanced CT of a PET-CT scan with those on a diagnostic contrast enhanced CT scan. The size of FDG-Avid lymph nodes was measured in both the short and long axis on both the low dose non-contrast CT of the PET-CT and the contrast enhanced CT by two independent readers. A total of 307 FGD avid lymph nodes were identified in 52 patients. There was no statistically significant differences in the measured size of the nodes on the non-contrast and contrast enhanced scans (p = 0.21). Baseline staging and restaging of FDG-Avid lymphomas can be performed with one test, PET-CT, without an accompanying contrast enhanced CT scan, with no effect on the measured nodal size.

Original languageEnglish
Pages (from-to)1083-1093
Number of pages11
JournalLeukemia and Lymphoma
Issue number5
StatePublished - 3 May 2016


  • Computed tomography
  • FDG-Avid
  • lymph node
  • lymphoma
  • positron emission tomography


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