Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/26922
Title: Support vector machine-based classification of neuroimages in Alzheimer's disease: direct comparison of FDG-PET, rCBF-SPECT and MRI data acquired from the same individuals
Authors: FERREIRA, Luiz K.RONDINA, Jane M.KUBO, RodrigoONO, Carla R.LEITE, Claudia C.SMID, JerusaBOTTINO, CassioNITRINI, RicardoBUSATTO, Geraldo F.DURAN, Fabio L.BUCHPIGUEL, Carlos A.
Citation: REVISTA BRASILEIRA DE PSIQUIATRIA, v.40, n.2, p.181-191, 2018
Abstract: Objective: To conduct the first support vector machine (SVM)-based study comparing the diagnostic accuracy of T1-weighted magnetic resonance imaging (T1-MRI), F-fluorodeoxyglucose-positron emission tomography (FDG-PET) and regional cerebral blood flow single-photon emission computed tomography (rCBF-SPECT) in Alzheimer's disease (AD). Method: Brain T1-MRI, FDG-PET and rCBF-SPECT scans were acquired from a sample of mild AD patients (n=20) and healthy elderly controls (n=18). SVM-based diagnostic accuracy indices were calculated using whole-brain information and leave-one-out cross-validation. Results: The accuracy obtained using PET and SPECT data were similar. PET accuracy was 68 similar to 71% and area under curve (AUC) 0.77 similar to 0.81; SPECT accuracy was 68 similar to 74% and AUC 0.75 similar to 0.79, and both had better performance than analysis with T1-MRI data (accuracy of 58%, AUC 0.67). The addition of PET or SPECT to MRI produced higher accuracy indices (68 similar to 74%; AUC: 0.74 similar to 0.82) than T1-MRI alone, but these were not clearly superior to the isolated neurofunctional modalities. Conclusion: In line with previous evidence, FDG-PET and rCBF-SPECT more accurately identified patients with AD than T1-MRI, and the addition of either PET or SPECT to T1-MRI data yielded increased accuracy. The comparable SPECT and PET performances, directly demonstrated for the first time in the present study, support the view that rCBF-SPECT still has a role to play in AD diagnosis.
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Artigos e Materiais de Revistas Científicas - FM/MDR
Departamento de Radiologia - FM/MDR

Artigos e Materiais de Revistas Científicas - FM/MNE
Departamento de Neurologia - FM/MNE

Artigos e Materiais de Revistas Científicas - FM/MPS
Departamento de Psiquiatria - FM/MPS

Artigos e Materiais de Revistas Científicas - HC/ICESP
Instituto do Câncer do Estado de São Paulo - HC/ICESP

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - HC/InRad
Instituto de Radiologia - HC/InRad

Artigos e Materiais de Revistas Científicas - LIM/15
LIM/15 - Laboratório de Investigação em Neurologia

Artigos e Materiais de Revistas Científicas - LIM/21
LIM/21 - Laboratório de Neuroimagem em Psiquiatria

Artigos e Materiais de Revistas Científicas - LIM/43
LIM/43 - Laboratório de Medicina Nuclear

Artigos e Materiais de Revistas Científicas - LIM/44
LIM/44 - Laboratório de Ressonância Magnética em Neurorradiologia


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