@article{oai:repo.qst.go.jp:00047206,
 author = {Mori, Takaaki and Shimada, Hitoshi and Shinotoh, Hitoshi and Hirano, Sigeki and Eguchi, Yoko and Yamada, Makiko and Fukuhara, Ryuji and Tanimukai, Satoshi and Ming-Rong, Zhang and Kuwabara, Satoshi and Ueno, Shu-ichi and Suhara, Tetsuya and 森 崇明 and 島田 斉 and 篠遠 仁 and 平野 成樹 and 江口 洋子 and 山田 真希子 and 張 明栄 and 須原 哲也},
 issue = {4},
 journal = {Journal of Neurology, Neurosurgery, and Psychiatry},
 month = {Oct},
 note = {Objective Neuropsychiatric symptoms affect many patients with Alzheimer's disease (AD). (11C)Pittsburgh Compound-B (PIB) positron emission tomography (PET) has enabled the in vivo visualisation of brain amyloid-β (Aβ) deposition. This study exploratively investigated the correlation between brain Aβ deposition measured by (11C)PIB PET and neuropsychiatric symptoms in AD. 
\nMethods Participants were 28 patients (15 women, 13 men) with PIB-positive AD. Clinical assessments included Mini-Mental State Examination, Clinical Dementia Rating scale, neuropsychiatry inventory (NPI) and frontal assessment battery. All patients underwent three-dimensional T1-weighted MRI and (11C)PIB PET. The distribution volume ratio (DVR), an index of (11C)PIB retention and, thus, Aβ deposition, was estimated voxel by voxel from (11C)PIB PET data with partial volume correction. Voxel-based correlation analysis was performed to assess the relationships between DVR and each NPI subscale. Additionally, voxel-based analysis of covariance (ANCOVA) of the DVR images was performed between Patients with AD with and without each neuropsychiatric symptom. Voxel-based morphometry analysis of MRI was also performed. 
\nResults Apathy subscale was correlated with (11C)PIB retention in the bilateral frontal and right anterior cingulate. (11C)PIB retention was greater in the bilateral frontal cortex of patients with AD with apathy than those of without apathy. Overlapping areas between the two analyses were the bilateral orbitofrontal gyrus and left superior frontal gyrus. Other NPI subscales were not correlated with (11C)PIB retention. Voxel-based morphometry analysis of MRI showed no significant cluster of correlation between grey matter volume and NPI subscales. 
\nConclusions This study revealed that prefrontal Aβ deposition correlates with apathy.},
 pages = {449--455},
 title = {Apathy correlates with prefrontal amyloid β deposition in Alzheimer's disease},
 volume = {85},
 year = {2013}
}