In:
Frontiers in Neuroscience, Frontiers Media SA, Vol. 15 ( 2021-6-28)
Abstract:
Hippocampal volume is one of the main biomarkers of Alzheimer’s Dementia (AD). Over the years, advanced tools that performed automatic segmentation of Magnetic Resonance Imaging (MRI) T13D scans have been developed, such as FreeSurfer (FS) and ACM-Adaboost (AA). Hippocampal volume is considered abnormal when it is below the 5th percentile of the normative population. The aim of this study was to set norms, established from the Alzheimer’s Disease Neuroimaging Initiative (ADNI) population, for hippocampal volume measured with FS v.6.0 and AA tools in the neuGRID platform ( www.neugrid2.eu ) and demonstrate their applicability for the Italian population. Methods Norms were set from a large group of 545 healthy controls belonging to ADNI. For each pipeline, subjects with segmentation errors were discarded, resulting in 532 valid segmentations for FS and 421 for AA (age range 56–90 years). The comparability of ADNI and the Italian Brain Normative Archive (IBNA), representative of the Italian general population, was assessed testing clinical variables, neuropsychological scores and normalized hippocampal volumes. Finally, percentiles were validated using the Italian Alzheimer’s disease Repository Without Borders (ARWiBo) as external independent data set to evaluate FS and AA generalizability. Results Hippocampal percentiles were checked with the chi-square goodness of fit test. P -values were not significant, showing that FS and AA algorithm distributions fitted the data well. Clinical, neuropsychological and volumetric features were similar in ADNI and IBNA ( p & gt; 0.01). Hippocampal volumes measured with both FS and AA were associated with age ( p & lt; 0.001). The 5th percentile thresholds, indicating left/right hippocampal atrophy were respectively: (i) below 3,223/3,456 mm 3 at 56 years and 2,506/2,415 mm 3 at 90 years for FS; (ii) below 4,583/4,873 mm 3 at 56 years and 3,831/3,870 mm 3 at 90 years for AA. The average volumes computed on 100 cognitively intact healthy controls (CN) selected from ARWiBo were close to the 50th percentiles, while those for 100 AD patients were close to the abnormal percentiles. Discussion Norms generated from ADNI through the automatic FS and AA segmentation tools may be used as normative references for Italian patients with suspected AD.
Type of Medium:
Online Resource
ISSN:
1662-453X
DOI:
10.3389/fnins.2021.656808
DOI:
10.3389/fnins.2021.656808.s001
DOI:
10.3389/fnins.2021.656808.s002
DOI:
10.3389/fnins.2021.656808.s003
DOI:
10.3389/fnins.2021.656808.s004
DOI:
10.3389/fnins.2021.656808.s005
DOI:
10.3389/fnins.2021.656808.s006
DOI:
10.3389/fnins.2021.656808.s007
DOI:
10.3389/fnins.2021.656808.s008
DOI:
10.3389/fnins.2021.656808.s009
DOI:
10.3389/fnins.2021.656808.s010
DOI:
10.3389/fnins.2021.656808.s011
DOI:
10.3389/fnins.2021.656808.s012
DOI:
10.3389/fnins.2021.656808.s013
DOI:
10.3389/fnins.2021.656808.s014
DOI:
10.3389/fnins.2021.656808.s015
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2411902-7
