کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6038970 1188810 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
T1ρ MRI of Alzheimer's disease
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
پیش نمایش صفحه اول مقاله
T1ρ MRI of Alzheimer's disease
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 41, Issue 4, 15 July 2008, Pages 1199-1205
نویسندگان
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