TY - JOUR
T1 - T1ρ MRI of Alzheimer's disease
AU - Borthakur, Arijitt
AU - Sochor, Matthew
AU - Davatzikos, Christos
AU - Trojanowski, John Q.
AU - Clark, Christopher M.
N1 - Funding Information:
This work was performed at a NIH supported resource center (NIH RR02305) and from a grant from the Pennsylvania State Tobacco Settlement. We thank Professor Ravinder Reddy for his thoughtful comments and funding support.
PY - 2008/7/15
Y1 - 2008/7/15
N2 - Alzheimer's disease (AD) is the most common form of dementia in the elderly. Classic symptoms of the disease include memory loss and confusion associated with the hallmark neuro-pathologic lesions of neurofibrillary tangles (NFT) and senile plaques (SP) and their sequelae, gray matter atrophy. Volumetric assessment methods measure tissue atrophy, which typically follows early biochemical changes. An alternate MRI contrast mechanism to visualize the early pathological changes is T1ρ (or "T-1-rho"), the spin lattice relaxation time constant in the rotating frame, which determines the decay of the transverse magnetization in the presence of a "spin-lock" radio-frequency field. Macromolecular changes (in plaques and tangles) that accompany early AD are expected to alter bulk water T1ρ relaxation times. In this work, we measure T1ρ MRI on patients with clinically diagnosed AD, MCI and in age-matched cognitively normal control subjects in order to compare T1ρ values with changes in brain volume in the same regions of the brain and demonstrate that T1ρ can potentially constitute an important biomarker of AD.
AB - Alzheimer's disease (AD) is the most common form of dementia in the elderly. Classic symptoms of the disease include memory loss and confusion associated with the hallmark neuro-pathologic lesions of neurofibrillary tangles (NFT) and senile plaques (SP) and their sequelae, gray matter atrophy. Volumetric assessment methods measure tissue atrophy, which typically follows early biochemical changes. An alternate MRI contrast mechanism to visualize the early pathological changes is T1ρ (or "T-1-rho"), the spin lattice relaxation time constant in the rotating frame, which determines the decay of the transverse magnetization in the presence of a "spin-lock" radio-frequency field. Macromolecular changes (in plaques and tangles) that accompany early AD are expected to alter bulk water T1ρ relaxation times. In this work, we measure T1ρ MRI on patients with clinically diagnosed AD, MCI and in age-matched cognitively normal control subjects in order to compare T1ρ values with changes in brain volume in the same regions of the brain and demonstrate that T1ρ can potentially constitute an important biomarker of AD.
KW - Alzheimer's disease
KW - Spin-lock imaging
KW - T1rho
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U2 - 10.1016/j.neuroimage.2008.03.030
DO - 10.1016/j.neuroimage.2008.03.030
M3 - Article
C2 - 18479942
AN - SCOPUS:44649105053
SN - 1053-8119
VL - 41
SP - 1199
EP - 1205
JO - NeuroImage
JF - NeuroImage
IS - 4
ER -