Automatic Semi-quantification of [123I]FP-CIT SPECT Scans in Healthy Volunteers Using BasGan Version 2: Results from the ENC-DAT Database

Overview

Journal Eur J Nucl Med Mol Imaging

Specialties Biophysics
Nuclear Medicine
Radiology

Date 2012 Dec 13

PMID 23232506

Citations 40

Authors

Flavio Nobili

Mehrdad Naseri

Fabrizio De Carli

Susan Asenbaum

Jan Booij

Jacques Darcourt

Peter Ell

Ozlem Kapucu

Paul Kemp

Claus Svarer

Claus Varer

Silvia Morbelli

Marco Pagani

Osama Sabri

Klaus Tatsch

Livia Tossici-Bolt

Terez Sera

Tierry Vander Borght

Koen Van Laere

Andrea Varrone

Affiliations

Soon will be listed here.

Abstract

Purpose: The aim of this study was to assess striatal dopamine transporter (DAT) availability in a large group of normal subjects.

Methods: The study included 122 healthy subjects, aged 18-83 years, recruited in the multicentre 'ENC-DAT' study (promoted by the European Association of Nuclear Medicine). Brain single photon emission computed tomography (SPECT) was acquired by means of dual-head cameras 3 h after [(123)I]FP-CIT administration. Specific to nondisplaceable binding ratios (SBRs) in the basal ganglia were computed using the 'BasGan' software, allowing automatic value extraction with partial volume effect correction. Multicentre camera inhomogeneity was taken into account by calibrating values on basal ganglia phantom data. SBR in each caudate nucleus (C) and putamen (P) were the dependent variables in a repeated measures general linear model analysis; age, gender, handedness and body mass index (BMI) were the independent variables.

Results: SBR values in C and P were significantly associated with age (mean rate decrease with age: 0.0306 per year, or 0.57 % of the general mean; p < 0.0001) and gender (women had higher values; p = 0.015), while no significant effect was found for handedness and BMI. A significant interaction was found between age and region (p < 0.0001) as the age-related decline was 0.028 for left C, 0.026 for right C and 0.034 for both P. P/C ratio analysis confirmed that age-related SBR decrease was stronger in P than in C (p < 0.0001). No significant effect was found for season or time of the day when the scan was acquired by analysing the residual of SBR values in C and P, after subtraction of age and gender effects.

Conclusion: This study confirms the dependency of DAT on ageing and highlights the gender differences in a large sample of healthy subjects, while it does not support the dependency of DAT on BMI, handedness, circadian rhythm or season.

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