Abstract
Purpose: Mild cognitive impairment (MCI) is a transitional pathological stage between normal ageing (NA) and Alzheimer’s disease (AD). Although subjects with MCI show a decline at different rates, some individuals remain stable or even show an improvement in their cognitive level after some years. We assessed the accuracy of FDG PET in discriminating MCI patients who converted to AD from those who did not. Methods: FDG PET was performed in 42 NA subjects, 27 MCI patients who had not converted to AD at 5 years (nc-MCI; mean follow-up time 7.5 ± 1.5 years), and 95 MCI patients who converted to AD within 5 years (MCI-AD; mean conversion time 1.8 ± 1.1 years). Relative FDG uptake values in 26 meta-volumes of interest were submitted to ANCOVA and support vector machine analyses to evaluate regional differences and discrimination accuracy. Results: The MCI-AD group showed significantly lower FDG uptake values in the temporoparietal cortex than the other two groups. FDG uptake values in the nc-MCI group were similar to those in the NA group. Support vector machine analysis discriminated nc-MCI from MCI-AD patients with an accuracy of 89% (AUC 0.91), correctly detecting 93% of the nc-MCI patients. Conclusion: In MCI patients not converting to AD within a minimum follow-up time of 5 years and MCI patients converting within 5 years, baseline FDG PET and volume-based analysis identified those who converted with an accuracy of 89%. However, further analysis is needed in patients with amnestic MCI who convert to a dementia other than AD.
| Original language | English |
|---|---|
| Pages (from-to) | 2042-2052 |
| Number of pages | 11 |
| Journal | European Journal of Nuclear Medicine and Molecular Imaging |
| Volume | 44 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Nov 1 2017 |
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Keywords
- Alzheimer’s disease
- Conversion to AD
- Mild cognitive impairment
- Positron emission tomography
- Support vector machine
- Volume of interest analysis
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
Cite this
Early identification of MCI converting to AD : a FDG PET study. / Pagani, Marco; Nobili, Flavio; Morbelli, Silvia; Arnaldi, Dario; Giuliani, Alessandro; Öberg, Johanna; Girtler, Nicola; Brugnolo, Andrea; Picco, Agnese; Bauckneht, Matteo; Piva, Roberta; Chincarini, Andrea; Sambuceti, Gianmario; Jonsson, Cathrine; De Carli, Fabrizio.
In: European Journal of Nuclear Medicine and Molecular Imaging, Vol. 44, No. 12, 01.11.2017, p. 2042-2052.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Early identification of MCI converting to AD
T2 - a FDG PET study
AU - Pagani, Marco
AU - Nobili, Flavio
AU - Morbelli, Silvia
AU - Arnaldi, Dario
AU - Giuliani, Alessandro
AU - Öberg, Johanna
AU - Girtler, Nicola
AU - Brugnolo, Andrea
AU - Picco, Agnese
AU - Bauckneht, Matteo
AU - Piva, Roberta
AU - Chincarini, Andrea
AU - Sambuceti, Gianmario
AU - Jonsson, Cathrine
AU - De Carli, Fabrizio
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Purpose: Mild cognitive impairment (MCI) is a transitional pathological stage between normal ageing (NA) and Alzheimer’s disease (AD). Although subjects with MCI show a decline at different rates, some individuals remain stable or even show an improvement in their cognitive level after some years. We assessed the accuracy of FDG PET in discriminating MCI patients who converted to AD from those who did not. Methods: FDG PET was performed in 42 NA subjects, 27 MCI patients who had not converted to AD at 5 years (nc-MCI; mean follow-up time 7.5 ± 1.5 years), and 95 MCI patients who converted to AD within 5 years (MCI-AD; mean conversion time 1.8 ± 1.1 years). Relative FDG uptake values in 26 meta-volumes of interest were submitted to ANCOVA and support vector machine analyses to evaluate regional differences and discrimination accuracy. Results: The MCI-AD group showed significantly lower FDG uptake values in the temporoparietal cortex than the other two groups. FDG uptake values in the nc-MCI group were similar to those in the NA group. Support vector machine analysis discriminated nc-MCI from MCI-AD patients with an accuracy of 89% (AUC 0.91), correctly detecting 93% of the nc-MCI patients. Conclusion: In MCI patients not converting to AD within a minimum follow-up time of 5 years and MCI patients converting within 5 years, baseline FDG PET and volume-based analysis identified those who converted with an accuracy of 89%. However, further analysis is needed in patients with amnestic MCI who convert to a dementia other than AD.
AB - Purpose: Mild cognitive impairment (MCI) is a transitional pathological stage between normal ageing (NA) and Alzheimer’s disease (AD). Although subjects with MCI show a decline at different rates, some individuals remain stable or even show an improvement in their cognitive level after some years. We assessed the accuracy of FDG PET in discriminating MCI patients who converted to AD from those who did not. Methods: FDG PET was performed in 42 NA subjects, 27 MCI patients who had not converted to AD at 5 years (nc-MCI; mean follow-up time 7.5 ± 1.5 years), and 95 MCI patients who converted to AD within 5 years (MCI-AD; mean conversion time 1.8 ± 1.1 years). Relative FDG uptake values in 26 meta-volumes of interest were submitted to ANCOVA and support vector machine analyses to evaluate regional differences and discrimination accuracy. Results: The MCI-AD group showed significantly lower FDG uptake values in the temporoparietal cortex than the other two groups. FDG uptake values in the nc-MCI group were similar to those in the NA group. Support vector machine analysis discriminated nc-MCI from MCI-AD patients with an accuracy of 89% (AUC 0.91), correctly detecting 93% of the nc-MCI patients. Conclusion: In MCI patients not converting to AD within a minimum follow-up time of 5 years and MCI patients converting within 5 years, baseline FDG PET and volume-based analysis identified those who converted with an accuracy of 89%. However, further analysis is needed in patients with amnestic MCI who convert to a dementia other than AD.
KW - Alzheimer’s disease
KW - Conversion to AD
KW - Mild cognitive impairment
KW - Positron emission tomography
KW - Support vector machine
KW - Volume of interest analysis
UR - http://www.scopus.com/inward/record.url?scp=85021743688&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021743688&partnerID=8YFLogxK
U2 - 10.1007/s00259-017-3761-x
DO - 10.1007/s00259-017-3761-x
M3 - Article
AN - SCOPUS:85021743688
VL - 44
SP - 2042
EP - 2052
JO - European Journal of Pediatrics
JF - European Journal of Pediatrics
SN - 0340-6199
IS - 12
ER -