FDOPA metabolism in the adult porcine brain: Influence of tracer circulation time and VOI selection on estimates of striatal DOPA decarboxylation

Erik H. Danielsen, Donald F. Smith, Flemming Andersen, Antony D. Gee, Dirk Bender, Soren B. Hansen, Flemming Hermansen, Leif Østergaard, Paul Cumming, Albert Gjedde

Research output: Contribution to journalArticle

Abstract

Different methodologies for PET data analysis influence the magnitude of estimates of blood-brain transfer coefficients and rate constants for the metabolism of FDOPA in living striatum. We now test the effects on several kinetic parameters of automatic procedures for volume of interest (VOI) selection. We also tested the sensitivity of the estimates to dynamic frame sequence duration, and produced a standard method for minimizing the variations in physiological estimates for FDOPA kinetics in minipig brain. We used minipigs because our previous work has shown them to provide an appropriate animal model for study normal and pathological cerebral DOPA metabolism using PET. Time-activity curves in striatum of adult minipigs were acquired in VOIs defined manually on MR-images, or alternatively on the basis of the radioactivity concentration based on the most radioactive voxel in the last scan frame. For all frame sequences, the relative decarboxylase activity (k3 D) declined significantly (P3 D declined significantly (P3 S).

Original languageEnglish (US)
Pages (from-to)157-168
Number of pages12
JournalJournal of Neuroscience Methods
Volume111
Issue number2
DOIs
StatePublished - Sep 30 2001
Externally publishedYes

Fingerprint

Miniature Swine
Corpus Striatum
Decarboxylation
Swine
Brain
Carboxy-Lyases
Radioactivity
Animal Models

Keywords

  • 6-[F]fluoro-L-3,4-dihydroxyphenylalanine
  • FDOPA
  • Minipig
  • Neuroimaging
  • Partial volume
  • PET
  • Striatum
  • Swine/pigs/porcine

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

FDOPA metabolism in the adult porcine brain : Influence of tracer circulation time and VOI selection on estimates of striatal DOPA decarboxylation. / Danielsen, Erik H.; Smith, Donald F.; Andersen, Flemming; Gee, Antony D.; Bender, Dirk; Hansen, Soren B.; Hermansen, Flemming; Østergaard, Leif; Cumming, Paul; Gjedde, Albert.

In: Journal of Neuroscience Methods, Vol. 111, No. 2, 30.09.2001, p. 157-168.

Research output: Contribution to journalArticle

Danielsen, EH, Smith, DF, Andersen, F, Gee, AD, Bender, D, Hansen, SB, Hermansen, F, Østergaard, L, Cumming, P & Gjedde, A 2001, 'FDOPA metabolism in the adult porcine brain: Influence of tracer circulation time and VOI selection on estimates of striatal DOPA decarboxylation', Journal of Neuroscience Methods, vol. 111, no. 2, pp. 157-168. https://doi.org/10.1016/S0165-0270(01)00453-8
Danielsen, Erik H. ; Smith, Donald F. ; Andersen, Flemming ; Gee, Antony D. ; Bender, Dirk ; Hansen, Soren B. ; Hermansen, Flemming ; Østergaard, Leif ; Cumming, Paul ; Gjedde, Albert. / FDOPA metabolism in the adult porcine brain : Influence of tracer circulation time and VOI selection on estimates of striatal DOPA decarboxylation. In: Journal of Neuroscience Methods. 2001 ; Vol. 111, No. 2. pp. 157-168.
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