Impact of point-spread function reconstruction on dynamic and static F-18-DOPA PET/CT quantitative parameters in glioma

Background: Quantification of dynamic and static parameters extracted from 3,4-dihydroxy-6-[18F]fluoro-L-phenylalanine (F-18-DOPA, FDOPA) positron emission tomography (PET)/computed tomography (CT) plays a critical role for glioma assessment. The objective of the present study was to investigate the...

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Published in:Quantitative imaging in medicine and surgery 2022-02, Vol.12 (2), p.1397-1404
Main Authors: Girard, Antoine, Francois, Madani, Chaboub, Nibras, Le Reste, Pierre-Jean, Devillers, Anne, Saint-Jalmes, Herve, Le Jeune, Florence, Palard-Novello, Xavier
Format: Article
Language:English
Subjects:
Bioengineering
Life Sciences
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Summary:Background: Quantification of dynamic and static parameters extracted from 3,4-dihydroxy-6-[18F]fluoro-L-phenylalanine (F-18-DOPA, FDOPA) positron emission tomography (PET)/computed tomography (CT) plays a critical role for glioma assessment. The objective of the present study was to investigate the impact of point-spread function (PSF) reconstruction on these quantitative parameters. Methods: Fourteen patients with untreated gliomas and investigated with FDOPA PET/CT were analyzed. The distribution of the 14 cases was as follows: 6 astrocytomas-isocitrate dehydrogenase-mutant; 2 oligodendrogliomas/1p19q-codeleted-isocitrate dehydrogenase-mutant; and 6 isocitrate dehydrogenase-wild-type glioblastomas. A 0-20-min dynamic images (8x15 sec, 2x30 sec, 2x60 sec, and 3x300 sec post-injection) and a 0-20-min static image were reconstructed with and without PSF. Tumoral volumes-of-interest were generated on all of the PET series and the background volumes-of-interest were generated on the 0-20-min static image with and without PSF. Static parameters (SUVmax and SUVmean) of the tumoral and the background volumes-of-interest and kinetic parameters (K1 and k2) of the tumoral volumes-of-interest extracted from using full kinetic analysis were provided. PSF and non-PSF quantitative parameters values were compared. Results: Thirty-three tumor volumes-of-interest and 14 background volumes-of-interest were analyzed. PSF images provided higher tumor SUVmax than non-PSF images for 23/33 VOIs [median SUVmax =3.0 (range, 1.4-10.2) with PSF vs. 2.7 (range, 1.4-9.1) without PSF; P
ISSN:2223-4292
2223-4306
DOI:10.21037/qims-21-742