Molecular Imaging and Biology

, Volume 13, Issue 2, pp 352–361

Restricted Water Diffusibility as Measured by Diffusion-weighted MR Imaging and Choline Uptake in 11C-Choline PET/CT are Correlated in Pelvic Lymph Nodes in Patients with Prostate Cancer

Authors

  • Ambros J. Beer
    • Department of Nuclear MedicineKlinikum rechts der Isar, Technische Universität München
    • Department of RadiologyKlinikum rechts der Isar, Technische Universität München
  • Michael Souvatzoglou
    • Department of Nuclear MedicineKlinikum rechts der Isar, Technische Universität München
  • Konstantin Holzapfel
    • Department of RadiologyKlinikum rechts der Isar, Technische Universität München
  • Carl Ganter
    • Department of RadiologyKlinikum rechts der Isar, Technische Universität München
  • Gregor Weirich
    • Institute of PathologyKlinikum rechts der Isar, Technische Universität München
  • Tobias Maurer
    • Department of UrologyKlinikum rechts der Isar, Technische Universität München
  • Hubert Kübler
    • Department of UrologyKlinikum rechts der Isar, Technische Universität München
  • Hans-Juergen Wester
    • Department of Nuclear MedicineKlinikum rechts der Isar, Technische Universität München
  • Jochen Gaa
    • Department of RadiologyKlinikum rechts der Isar, Technische Universität München
  • Bernd J. Krause
    • Department of Nuclear MedicineKlinikum rechts der Isar, Technische Universität München
Research Article

DOI: 10.1007/s11307-010-0337-6

Cite this article as:
Beer, A.J., Eiber, M., Souvatzoglou, M. et al. Mol Imaging Biol (2011) 13: 352. doi:10.1007/s11307-010-0337-6

Abstract

Purpose

11C-Choline-positron emission tomography (PET)/computed tomography (CT) is increasingly used in patients with prostate cancer. Another promising technique for assessment of tumor biology is diffusion-weighted MR imaging (DWI). The aim of the study was to compare the functional parameters standardized uptake value (SUV) in PET and apparent diffusion coefficient (ADC) value in DWI of lymph nodes in prostate cancer patients.

Procedures

Fourteen patients with prostate cancer underwent DWI at 1.5T and 11C-Choline-PET/CT. ADC values and SUVs of all lymph nodes larger than 5 mm (n = 55) were compared by using linear regression analysis. Performance of DWI and 11C-Choline PET was assessed by receiver operator characteristic curve analysis using histopathology or clinical follow-up as standard of reference.

Results

ADC values and SUV showed a moderate but highly significant inverse correlation (r = −0.5144, p < 0.0001). In lymph nodes with low ADC values, the dispersion of SUV was more pronounced. Moreover, a highly significant difference was observed for mean ADC values and SUV in lymph nodes considered as benign or malignant by follow-up/histopathology (ADC 1.60 ± 0.24 vs. 1.09 ± 0.23 × 10−3 mm2/s; SUV 1.82 ± 0.57 vs. 4.68 ± 03.12; p < 0.0001, respectively).

Conclusion

These pilot data propose the ADC value in DWI as a new potential imaging biomarker which might provide additional information on tumor pathophysiology compared to the SUV in 11C-Choline PET/CT.

Key words

11C-Choline PET/CTDiffusion-weighted MR imagingComparisonLymph node metastasesProstate cancer

Copyright information

© Academy of Molecular Imaging and Society for Molecular Imaging 2010