Impact of simulated reduced injected dose on the assessment of amyloid PET scans.

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Impact of simulated reduced injected dose on the assessment of amyloid PET scans.

Young, Peter (författare): Gothenburg University,Göteborgs universitet,University of Gothenburg,Wallenberg Centre for Molecular and Translational Medicine,Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi,Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry

Heeman, Fiona, 1992 (författare): Gothenburg University,Göteborgs universitet,University of Gothenburg,Vrije Universiteit Amsterdam,Amsterdam Neuroscience,Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi,Wallenberg Centre for Molecular and Translational Medicine,Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry

Axelsson, Jan, 1966- (författare): Umeå University,Umeå universitet,Radiofysik

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Collij, Lyduine E. (författare): Lund University,Lunds universitet,Klinisk minnesforskning,Forskargrupper vid Lunds universitet,Clinical Memory Research,Lund University Research Groups,Amsterdam Neuroscience,Vrije Universiteit Amsterdam

Hitzel, Anne (författare): Department of Nuclear Medicine, Toulouse University Hospital, Toulouse, France

Sanaat, Amirhossein (författare): Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland

Niñerola-Baizan, Aida (författare): Nuclear Medicine Department, Hospital Clínic Barcelona, Barcelona, Spain; Biomedical Research Networking Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), ISCIII, Barcelona, Spain

Perissinotti, Andrés (författare): Nuclear Medicine Department, Hospital Clínic Barcelona, Barcelona, Spain; Biomedical Research Networking Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), ISCIII, Barcelona, Spain

Lubberink, Mark (författare): Uppsala University,Uppsala universitet,Radiologi,Nuclear Medicine and PET, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden

Frisoni, Giovanni B (författare): Laboratory of Neuroimaging of Aging (LANVIE), University of Geneva, Geneva, Switzerland; Geneva Memory Center, Department of Rehabilitation and Geriatrics, Geneva University Hospitals, Geneva, Switzerland

Zaidi, Habib (författare): Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland; Geneva University Neurocenter, Geneva University, Geneva, Switzerland; Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, Netherlands; Department of Nuclear Medicine, University of Southern Denmark, Odense, Denmark

Barkhof, Frederik (författare): Department of Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Amsterdam Neuroscience, Neurodegeneration, Amsterdam, Netherlands; UCL Institute of Neurology, London, United Kingdom,University College London

Farrar, Gill (författare): GE Healthcare, Amersham, United Kingdom

Baker, Suzanne (författare): Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, United States; Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, United States

Gispert, Juan Domingo (författare): Barcelona βeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain; Centro de Investigación Biomédica en Red Bioingeniería, Biomateriales y Nanomedicina, Madrid, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain; Universitat Pompeu Fabra, Barcelona, Spain,CIBER Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)

Garibotto, Valentina (författare): Division of Nuclear Medicine and Molecular Imaging, University Hospitals of Geneva; NIMTLab; Center for Biomedical Imaging (CIBM), University of Geneva, Geneva, Switzerland

Rieckmann, Anna (författare): Institute for Psychology, Universität Der Bundeswehr München, Neubiberg, Germany,Bundeswehr University Munich

Schöll, Michael, 1980 (författare): Gothenburg University,Göteborgs universitet,University of Gothenburg,Sahlgrenska University Hospital,University College London,Wallenberg Centre for Molecular and Translational Medicine,Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi,Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry

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(creator_code:org_t)

2024
2024
Engelska.
Ingår i: European Journal of Nuclear Medicine and Molecular Imaging. - 1619-7070 .- 1619-7089. ; 51:3, s. 734-748

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Tidskriftsartikel (refereegranskat)

Abstract Ämnesord

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PURPOSE: To investigate the impact of reduced injected doses on the quantitative and qualitative assessment of the amyloid PET tracers [18F]flutemetamol and [18F]florbetaben.METHODS: Cognitively impaired and unimpaired individuals (N = 250, 36% Aβ-positive) were included and injected with [18F]flutemetamol (N = 175) or [18F]florbetaben (N = 75). PET scans were acquired in list-mode (90-110 min post-injection) and reduced-dose images were simulated to generate images of 75, 50, 25, 12.5 and 5% of the original injected dose. Images were reconstructed using vendor-provided reconstruction tools and visually assessed for Aβ-pathology. SUVRs were calculated for a global cortical and three smaller regions using a cerebellar cortex reference tissue, and Centiloid was computed. Absolute and percentage differences in SUVR and CL were calculated between dose levels, and the ability to discriminate between Aβ- and Aβ + scans was evaluated using ROC analyses. Finally, intra-reader agreement between the reduced dose and 100% images was evaluated.RESULTS: At 5% injected dose, change in SUVR was 3.72% and 3.12%, with absolute change in Centiloid 3.35CL and 4.62CL, for [18F]flutemetamol and [18F]florbetaben, respectively. At 12.5% injected dose, percentage change in SUVR and absolute change in Centiloid were < 1.5%. AUCs for discriminating Aβ- from Aβ + scans were high (AUC ≥ 0.94) across dose levels, and visual assessment showed intra-reader agreement of > 80% for both tracers.CONCLUSION: This proof-of-concept study showed that for both [18F]flutemetamol and [18F]florbetaben, adequate quantitative and qualitative assessments can be obtained at 12.5% of the original injected dose. However, decisions to reduce the injected dose should be made considering the specific clinical or research circumstances.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)

Nyckelord

Alzheimer’s disease
Amyloid
Dose reduction
Neuroimaging
PET
Alzheimer’s disease
Amyloid
Dose reduction
Neuroimaging
PET
Alzheimer's disease

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