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Early 11C-PIB frames and 18F-FDG PET measures are comparable: a study validated in a cohort of AD and FTLD patients
Rostomian AH, Madison C, Rabinovici GD, Jagust WJ.. Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 2011-01-13
Topic: Brain proteins, microglia and lab models
Unlabelled The availability of new PET ligands offers the potential to measure fibrillar β-amyloid in the brain. Nevertheless, physiologic information in the form of perfusion or metabolism may still be useful in differentiating causes of dementia during life. In this study, we investigated whether early (11)C-Pittsburgh compound B ((11)C-PIB) PET frames (perfusion (11)C-PIB [pPIB]) could provide information equivalent to blood flow and metabolism. First, we assessed the similarity of pPIB and (18)F-FDG PET images in a test cohort with various clinical diagnoses (n = 10), and then we validated the results in a cohort of patients with Alzheimer disease (AD) (n = 42; mean age ± SD, 66.6 ± 10.6 y; mean Mini-Mental State Examination [MMSE] score ± SD, 22.2 ± 6.0) or frontotemporal lobar degeneration (FTLD) (n = 31; age ± SD, 63.9 ± 7.1 y, mean MMSE score ± SD, 23.8 ± 6.7). Methods To identify the (11)C-PIB frames best representing perfusion, we ran on a test cohort an iterative algorithm, including generating normalized (cerebellar reference) perfusion pPIB images across variable frame ranges and calculating Pearson R values of the sum of these pPIB frames with the sum of all (18)F-FDG frames (cerebellar normalized) for all brain tissue voxels. Once this perfusion frame range was determined on the test cohort, it was then validated on an extended cohort and the power of pPIB in differential diagnosis was compared with (18)F-FDG by performing a logistic regression of regions-of-interest tracer measure (pPIB or (18)F-FDG) versus diagnosis. Results A 7-min window, corresponding to minutes 1-8 (frames 5-15), produced the highest voxelwise correlation between (18)F-FDG and pPIB (R = 0.78 ± 0.05). This pPIB frame range was further validated on the extended AD and FTLD cohort across 12 regions of interest (R = 0.91 ± 0.09). A logistic model using pPIB was able to classify 90.5% of the AD and 83.9% of the FTLD patients correctly. Using (18)F-FDG, we correctly classified 88.1% of AD and 83.9% of FTLD patients. The temporal pole and temporal neocortex were significant discriminators (P Conclusion The high correlation between pPIB and (18)F-FDG measures and their comparable performance in differential diagnosis are promising in providing functional information using (11)C-PIB PET data. This approach could be useful, obviating (18)F-FDG scans when longer-lived amyloid imaging agents become available.
Key findings
- First, we assessed the similarity of pPIB and (18)F-FDG PET images in a test cohort with various clinical diagnoses (n = 10), and then we validated the results in a cohort of patients with Alzheimer disease (AD) (n = 42; mean age ± SD, 66.6 ± 10.6 y; mean Mini-Mental State Examination [MMSE] score ± SD, 22.2 ± 6.0) or frontotemporal lobar degeneration (FTLD) (n = 31; age ± SD, 63.9 ± 7.1 y, mean MMSE score ± SD, 23.8 ± 6.7).
- Once this perfusion frame range was determined on the test cohort, it was then validated on an extended cohort and the power of pPIB in differential diagnosis was compared with (18)F-FDG by performing a logistic regression of regions-of-interest tracer measure (pPIB or (18)F-FDG) versus diagnosis.
- Results A 7-min window, corresponding to minutes 1-8 (frames 5-15), produced the highest voxelwise correlation between (18)F-FDG and pPIB (R = 0.78 ± 0.05).
- The temporal pole and temporal neocortex were significant discriminators (P Conclusion The high correlation between pPIB and (18)F-FDG measures and their comparable performance in differential diagnosis are promising in providing functional information using (11)C-PIB PET data.
Why it matters
This study found that early 11C-PIB PET frames provided information comparable to 18F-FDG PET for measuring brain perfusion or metabolism in people with Alzheimer's disease or frontotemporal lobar degeneration. It is about improving dementia diagnosis with imaging, not about treating, curing, or preventing Alzheimer's disease.
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Study details
- Effect size90.5%; 83.9%; 88.1%
- Evidence strengthModerate
How this study scored 45/100
Published in a peer-reviewed journal. Scored zero for study design, sample size, studied in people and randomised / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Journal of nuclear medicine : official publication, Society of Nuclear Medicine) |
| Journal's citation record | 2 / 4 | Journal of Nuclear Medicine: journal h-index 230 (OpenAlex, 2026-10-29) |
| Study design | 0 / 12 | No study design recorded — scores zero, not guessed (not stated in the record — scored 0) |
| Strength of evidence | 3 / 5 | Rated “moderate” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 1 / 5 | 2011 — within 20 year(s) of the newest study here |
| Sample size | 0 / 4 | Participant count not stated — scores zero (not stated in the record — scored 0) |
| Effect reported | 2 / 3 | Effect reported as a number, without an interval or test |
| Studied in people | 0 / 3 | Not stated whether this was studied in people — scores zero (not stated in the record — scored 0) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 4 / 7 | Cited 89 times (OpenAlex, 2026-10-10) |
| Citations per year | 2 / 5 | 5.2 citations a year over 17 year(s) since 2011 |
| Impact for its field and year | 2 / 6 | Cited 2.8× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 1 / 6 | Cited by 2 other studies in this library |
| Still being cited | 1 / 4 | Cited 12 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 4 / 4 | Last-listed author William J. Jagust: h-index 152 (OpenAlex, whole career) |
| Institution's track record | 2 / 3 | University of California, Berkeley: institution h-index 2,012 (OpenAlex) |
| Multi-centre collaboration | 2 / 3 | OpenAlex lists 4 institution(s) in 1 country |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 21233181) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 45 / 100 | — |
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Read the original
- DOI: 10.2967/jnumed.110.082057
- PubMed: 21233181
- Original source →
- Free full text: Journal of Nuclear Medicine →
Full text: free to read — OpenAlex lists this copy as free to read: the link above (checked 6 Feb 1020).
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
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APA 7th
Rostomian, A. H., Madison, C., Rabinovici, G. D., & Jagust, W. J. (2011). Early 11C-PIB frames and 18F-FDG PET measures are comparable: a study validated in a cohort of AD and FTLD patients. Journal of nuclear medicine : official publication, Society of Nuclear Medicine. https://doi.org/10.2967/jnumed.110.082057
Vancouver
Rostomian AH, Madison C, Rabinovici GD, Jagust WJ. Early 11C-PIB frames and 18F-FDG PET measures are comparable: a study validated in a cohort of AD and FTLD patients. Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 2011. doi:10.2967/jnumed.110.082057. PMID: 21233181.
BibTeX
@article{rostomian2011-21233181,
author = {Rostomian, A. H. and Madison, C. and Rabinovici, G. D. and Jagust, W. J.},
title = {{Early 11C-PIB frames and 18F-FDG PET measures are comparable: a study validated in a cohort of AD and FTLD patients}},
journal = {Journal of nuclear medicine : official publication, Society of Nuclear Medicine},
year = {2011},
doi = {10.2967/jnumed.110.082057},
pmid = {21233181},
url = {https://doi.org/10.2967/jnumed.110.082057}
}
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