Dual-time-point F-18 FDG PET/CT for evaluation in patients with malignant lymphoma

Takayoshi Shinya, Soichiro Fujii, Shoji Asakura, Toshitaka Taniguchi, Kotaro Yoshio, Aierken Alafate, Shuhei Sato, Tadashi Yoshino, Susumu Kanazawa

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Objective The aim of this study was to evaluate the usefulness of F-18 fluorodeoxyglucose (FDG) dual-timepoint (DTP) positron emission tomography (PET)/computed tomography (CT) with semiquantitative analyses for the initial staging in patients with malignant lymphoma. Methods Forty-three patients had DTP PET/CT, with 60-min and 2-h scan [n = 8, Hodgkin's lymphoma (HL); n = 12, indolent non-Hodgkin lymphoma (NHL); n = 23, aggressive NHL]. Results A total of 524 lesions were evaluated (406 lymph nodes and 118 extra-nodal lesions). The maximum standardized uptake value (SUVmax) on 2-h delayed scan (SUV2) was significantly higher than those on 1-h early scan (SUV1) for all groups (P<0.0001 for HL; P<0.0001 for indolent NHL; P<0.0001 for aggressive NHL). Significant differences were detected between HL and indolent NHL, between indolent NHL and the aggressive NHL for both SUV1 and SUV2 (each P<0.0001). No significant differences were detected between HL and aggressive NHL for both SUV1 and SUV2 (P = 0.6891 for SUV1; P = 0.8828 for SUV 2); however, significant differences were detected for the retention index of SUVmax between these groups (P = 0.0238). Conclusions DTP F-18 FDG PET/CT with a semiquantitative technique may have the potential to provide the more accurate diagnoses for the staging of malignant lymphoma and the more important role in predicting the histological grades of malignancy compared with singletime- point F-18 FDG-PET scan.

Original languageEnglish
Pages (from-to)616-621
Number of pages6
JournalAnnals of nuclear medicine
Issue number8
Publication statusPublished - Oct 2012


  • Delayed scan
  • Dual-time-point (DTP)
  • F-18 FDG
  • Malignant lymphoma
  • PET/CT

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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