Plasma radiometabolite correction in dynamic PET studies: Insights on the available modeling approaches

J Cereb Blood Flow Metab. 2016 Feb;36(2):326-39. doi: 10.1177/0271678X15610585. Epub 2015 Oct 14.

Abstract

Full kinetic modeling of dynamic PET images requires the measurement of radioligand concentrations in the arterial plasma. The unchanged parent radioligand must, however, be separated from its radiometabolites by chromatographic methods. Thus, only few samples can usually be analyzed and the resulting measurements are often noisy. Therefore, the measurements must be fitted with a mathematical model. This work presents a comprehensive analysis of the different models proposed in the literature to describe the plasma parent fraction (PPf) and of the alternative approaches for radiometabolite correction. Finally, we used a dataset of [(11)C]PBR28 brain PET data as a case study to guide the reader through the PPf model selection process.

Keywords: PET; PPf modeling; plasma parent fraction; radiometabolite correction.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Algorithms
  • Biotransformation
  • Healthy Volunteers
  • Humans
  • Image Processing, Computer-Assisted
  • Models, Neurological*
  • Models, Theoretical*
  • Population
  • Positron-Emission Tomography / methods*
  • Positron-Emission Tomography / statistics & numerical data*
  • Pyrimidines / blood
  • Pyrimidines / pharmacokinetics
  • Radiopharmaceuticals / blood
  • Radiopharmaceuticals / pharmacokinetics*
  • Reference Values

Substances

  • (methyl-(11)C)N-acetyl-N-(2-methoxybenzyl)-2-phenoxy-5-pyridinamine
  • Pyrimidines
  • Radiopharmaceuticals