Magnetic Resonance Elastography of Cognitive Impairment
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 发起方
- Mayo Clinic
- 入组人数
- 450
- 试验地点
- 1
- 主要终点
- Shear Stiffness
研究概览
简要总结
The purpose of this research is to further investigate the potential of brain stiffness as a novel biomarker for Alzheimer's disease.
详细描述
Due to shifting demographics, the prevalence of dementia continues to increase in the population. To mitigate the effects of dementia will require new treatments working jointly with new methods for earlier and more sensitive diagnosis of the diseases. Magnetic resonance elastography (MRE) is a noninvasive technique for measuring tissue stiffness. MRE is a three-step process beginning with the introduction of shear waves into the tissue of interest with an external vibration source. The shear waves are imaged with a phase-contrast MRI pulse sequence and the resulting wave images are mathematically inverted to calculate tissue stiffness.
Preliminary data indicate that global brain stiffness is highly reproducible and that Alzheimer's disease causes a decrease in brain stiffness when compared to age- and gender-matched cognitively normal controls. The purpose of the proposed work is to further investigate the potential of brain stiffness as a novel biomarker for Alzheimer's disease. A comparison between brain stiffness and existing Alzheimer's disease biomarkers will help determine the biological basis of the observed stiffness change and in time may improve the sensitivity of Alzheimer's disease diagnosis and grading.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 100 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •for Control Subjects:
- •In good general health
- •No Active neurological or psychiatric conditions, if a prior neurological or psychiatric condition was present they must have returned to normal
- •No cognitive complaints
- •Normal neurological examination
- •No psychoactive medications
- •They may have a chronic medical condition that does not affect cognition
- •Low Aβ load Pittsburgh compound-B (PiB) ratio <1.5
- •Inclusion Criteria for Mild Cognitive Impairment Subjects:
- •In good general health
- •Memory complaint documented by the patient and collateral source
- •Normal general cognitive function as determined by measure of general intellectual function and screening including the Short Test of Mental Status
- •Normal activities of daily living as documented by history and Record of Independent Living
- •Not demented by DSM-III-R criteria
- •Do have an objective memory impairment determined by the clinical judgement of the neuropsychologists and neurologists
- •High Aβ load Pittsburgh compound-B (PiB) ratio ≥1.5
- •Inclusion Criteria for Alzheimer's Disease Subjects:
- •In good general health
- •Dementia not a result of other medical or psychiatric conditions
- •Diagnosis of dementia made according to DSM-III-R criteria
- •Do have objective memory impairment determined by the clinical judgement of the neuropsychologists and neurologists
- •High Aβ load Pittsburgh compound-B (PiB) ratio ≥1.5
排除标准
- •Alzheimer's disease or mild cognitive impairment due to a known genetic mutation
- •Major depression
- •History of primary or metastatic intracranial neoplasm, significant head trauma, intra-cerebral hemorrhage, hemispheric stroke
- •Contradictions to MRI imaging including but not limited to cardiac pacemakers, intraocular or intracranial metal, or other MRI incompatible devices.
- •Pregnant women. Women of child bearing potential will be given a urine pregnancy test prior the MRI scan. Results will be shared with the participant. If the pregnancy test is positive, the participant will not be included within the study
研究组 & 干预措施
Healthy Control Group
Subjects will have a magnetic resonance elastography (MRE) performed.
干预措施: Magnetic Resonance Elastography (MRE) (Diagnostic Test)
Alzheimer's Disease Group
Subjects will have a magnetic resonance elastography (MRE) performed.
干预措施: Magnetic Resonance Elastography (MRE) (Diagnostic Test)
Mild Cognitive Impairment Group
Subjects will have a magnetic resonance elastography (MRE) performed.
干预措施: Magnetic Resonance Elastography (MRE) (Diagnostic Test)
结局指标
主要结局
Shear Stiffness
时间窗: Baseline
Brain stiffness measured by the magnetic resonance elastography (MRE) reported in Kilopascal (kPa)
次要结局
- Joint mechanical-diffusion(Baseline)