Related Experiment Video
Updated: Apr 11, 2026
Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451
Published on: April 18, 2025
Early-stage differentiation between presenile Alzheimer's disease and frontotemporal dementia using arterial spin
Rebecca M E Steketee1, Esther E Bron2, Rozanna Meijboom1
1Department of Radiology, Erasmus MC - University Medical Center, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
Objective:
To investigate arterial spin labeling (ASL)-MRI for the early diagnosis of and differentiation between the two most common types of presenile dementia: Alzheimer's disease (AD) and frontotemporal dementia (FTD), and for distinguishing age-related from pathological perfusion changes.
Methods:
Thirteen AD and 19 FTD patients, and 25 age-matched older and 22 younger controls underwent 3D pseudo-continuous ASL-MRI at 3 T. Gray matter (GM) volume and cerebral blood flow (CBF), corrected for partial volume effects, were quantified in the entire supratentorial cortex and in 10 GM regions. Sensitivity, specificity and diagnostic performance were evaluated in regions showing significant CBF differences between patient groups or between patients and older controls.
Results:
AD compared with FTD patients had hypoperfusion in the posterior cingulate cortex, differentiating these with a diagnostic performance of 74 %. Compared to older controls, FTD patients showed hypoperfusion in the anterior cingulate cortex, whereas AD patients showed a more widespread regional hypoperfusion as well as atrophy. Regional atrophy was not different between AD and FTD. Diagnostic performance of ASL to differentiate AD or FTD from controls was good (78-85 %). Older controls showed global hypoperfusion compared to young controls.
Conclusion:
ASL-MRI contributes to early diagnosis of and differentiation between presenile AD and FTD.
Key Points:
ASL-MRI facilitates differentiation of early Alzheimer's disease and frontotemporal dementia. Posterior cingulate perfusion is lower in Alzheimer's disease than frontotemporal dementia. Compared to controls, Alzheimer's disease patients show hypoperfusion in multiple regions. Compared to controls, frontotemporal dementia patients show focal anterior cingulate hypoperfusion. Global decreased perfusion in older adults differs from hypoperfusion in dementia.
Insights
Arterial Spin Labeling MRI aids in early diagnosis and differentiation of Alzheimer's disease (AD) and frontotemporal dementia (FTD). This technique distinguishes pathological brain perfusion changes from normal aging, improving diagnostic accuracy for these neurodegenerative conditions.
Area of Science:
- Neuroimaging
- Radiology
- Neurology
Background:
- Presenile dementia, including Alzheimer's disease (AD) and frontotemporal dementia (FTD), presents diagnostic challenges.
- Distinguishing between AD, FTD, and age-related perfusion changes is crucial for accurate diagnosis and management.
- Arterial Spin Labeling (ASL)-MRI is a non-invasive technique for assessing cerebral blood flow (CBF).
Purpose of the Study:
- To evaluate ASL-MRI for early diagnosis and differentiation of AD and FTD.
- To differentiate pathological perfusion changes in dementia from age-related alterations.
- To assess the diagnostic performance of ASL-MRI in distinguishing AD and FTD from controls.
Main Methods:
- 3D pseudo-continuous ASL-MRI at 3 Tesla was performed on 13 AD patients, 19 FTD patients, 25 older controls, and 22 younger controls.
- Gray matter (GM) volume and CBF were quantified, corrected for partial volume effects.
- Diagnostic performance was evaluated based on sensitivity, specificity, and accuracy in identifying perfusion differences.
Main Results:
- AD patients showed hypoperfusion in the posterior cingulate cortex compared to FTD patients (74% diagnostic performance).
- FTD patients exhibited hypoperfusion in the anterior cingulate cortex compared to older controls.
- AD patients demonstrated widespread regional hypoperfusion and atrophy compared to controls; ASL showed good diagnostic performance (78-85%) for differentiating dementia from controls.
Conclusions:
- ASL-MRI is effective for the early diagnosis and differentiation of presenile AD and FTD.
- Specific patterns of hypoperfusion (posterior cingulate in AD, anterior cingulate in FTD) aid in differentiation.
- ASL-MRI can distinguish dementia-related hypoperfusion from global hypoperfusion observed in normal aging.
