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Ruben Dörfel

@rdoerfel

Interested in aging, neuroimaging, and machine learning. PhD student at Karolinska Institutet, NRU Rigshospitalet, and DIKU UCPH

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18.11.2024
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Latest posts by Ruben Dörfel @rdoerfel

Nahh, just remove them

03.02.2026 23:47 👍 1 🔁 0 💬 0 📌 0

First generation (methylation) aging clocks (2011) were developed after brain age (2010). The aging field has subsequently moved on and is now in its third or fourth generation. Yet, in the neuroimaging field, we are still stuck with brain age, essentially a first generation clock.

02.02.2026 21:38 👍 0 🔁 0 💬 0 📌 0

IMO there is no reason to rely on LLMs to generate citations. Overloaf integrates very well with Zotero and Mendeley, and if you use other editors, most reference managers export bibtex files. So why would I require an LLM to generate my citations.

24.01.2026 18:50 👍 1 🔁 0 💬 0 📌 0
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WARN-D machine learning competition is live » Eiko Fried If you share one single thing of our team in 2026—on social media or per email with your colleagues—please let it be this machine learning competition. It was half a decade of work to get here, especi...

After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data.

If you share a single thing of my lab this year, please make it this competition.

eiko-fried.com/warn-d-machi...

07.01.2026 19:39 👍 187 🔁 159 💬 5 📌 5
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Evaluation of rapamycin as a neuroprotective treatment in Alzheimer’s disease: a six-month single-arm open-label clinical pilot trial Background Rapamycin has demonstrated neuroprotective effects in preclinical Alzheimer’s disease (AD) models, yet clinical data remain limited. Here, we conducted a pilot trial to assess the feasibili...

I'm excited to share our pre-registered phase IIa pilot study on rapamycin treatment in early Alzheimer's disease, using multimodal neuroimaging and CSF biomarkers to assess safety and feasibility! doi.org/10.64898/202... (1/6)

05.01.2026 14:50 👍 0 🔁 1 💬 1 📌 0

Interestingly, levels of certain CSF biomarkers increased (total tau, neurofilament light, and Aβ40/42), while the p-tau/total tau ratio decreased. These unexpected findings warrant further investigation to determine their implications for drug administration and potential long-term effects. (6/6)

05.01.2026 14:50 👍 0 🔁 0 💬 1 📌 0

There was also a positive correlation between the drug's blood concentration and increased brain metabolism, although the sample size is small and definitive conclusions are difficult to draw. (5/6)

05.01.2026 14:50 👍 0 🔁 0 💬 1 📌 0

Rapamycin was well tolerated with no serious adverse events. Glucose metabolism in our primary regions showed no decline and perhaps even increased in exploratory regions, in contrast to what would be expected from the natural disease progression. (4/6)

05.01.2026 14:50 👍 0 🔁 0 💬 1 📌 0

We measured brain glucose metabolism using FDG PET, measured blood flow using ASL MRI, tested for CSF biomarkers, measured volumetric changes on MRI, and performed cognitive assessments before and after treatment. (3/6)

05.01.2026 14:50 👍 0 🔁 0 💬 1 📌 0

Rapamycin is a well-known putative geroprotective compound that extends life- and healthspan in preclinical models, but human clinical data remain limited. In this study, we enrolled 14 participants with early Alzheimer’s disease who received a weekly dose of oral rapamycin for 26 weeks. (2/6)

05.01.2026 14:50 👍 0 🔁 0 💬 1 📌 0
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Evaluation of rapamycin as a neuroprotective treatment in Alzheimer’s disease: a six-month single-arm open-label clinical pilot trial Background Rapamycin has demonstrated neuroprotective effects in preclinical Alzheimer’s disease (AD) models, yet clinical data remain limited. Here, we conducted a pilot trial to assess the feasibili...

I'm excited to share our pre-registered phase IIa pilot study on rapamycin treatment in early Alzheimer's disease, using multimodal neuroimaging and CSF biomarkers to assess safety and feasibility! doi.org/10.64898/202... (1/6)

05.01.2026 14:50 👍 0 🔁 1 💬 1 📌 0

When you can't give a simple answer to that question... something needs to be redesigned! I have never seen a conference need to make a video to explain *character limits*. 🤔

06.12.2025 11:56 👍 3 🔁 1 💬 0 📌 0

@euripsconf.bsky.social

05.12.2025 16:28 👍 0 🔁 0 💬 0 📌 0
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Love it EurIPA #EurIPS

05.12.2025 14:56 👍 1 🔁 0 💬 1 📌 0

I think that many people interested in explainable/interpretable "AI" in medicine and health mean well but misunderstand the nature and value of prediction. This focus, imo, is also a distraction from much more needed efforts to ensure that AI based predictions are actually useful.

09.08.2024 06:10 👍 22 🔁 4 💬 3 📌 1

No hand-drawn slides? ;D

04.12.2025 17:48 👍 2 🔁 0 💬 0 📌 0

A lot of crap research is being done with the microbiome. At the heart of much of the research is fundamentally unreliable data.

16.11.2025 12:46 👍 40 🔁 7 💬 2 📌 0

More open journals like TMLR. IMO the peer review process is much better anyway.

30.11.2025 10:55 👍 8 🔁 0 💬 1 📌 0
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Alt.

27.11.2025 06:42 👍 13 🔁 2 💬 1 📌 0

Not surprising, as both are on that paper as well :D

07.11.2025 09:39 👍 4 🔁 0 💬 0 📌 0

Very much in line with work by Vidal-Pineiro et al., 2021 (eLife) and Smith et al., 2025 (Imaging Neuroscience).

07.11.2025 09:38 👍 2 🔁 0 💬 1 📌 0
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Distinguishing Lifelong Individual Differences from Divergent Aging Trajectories of Adult Brain Volumes Differences in the volumes of brain structures between individuals are often linked to various conditions, including Alzheimer’s disease, schizophrenia, and overall brain health. However, it remains u...

Interesting paper showing that "much inter-individual differences in neuroanatomical volumes almost exclusively reflects stable differences between individuals" before 60 years, rather than age-related changes.
www.biorxiv.org/content/10.1...

07.11.2025 09:38 👍 6 🔁 0 💬 1 📌 0

Prompt to Chat: "Please explain [insert methodology] to me like I'm 10 years old and stupid"

07.11.2025 09:30 👍 0 🔁 0 💬 1 📌 0

Issue 3: "While cross-sectional studies can provide valuable snapshots of developmental differences, they are insufficient for testing hypotheses about the speed, timing, or trajectory of brain development"

06.11.2025 10:53 👍 0 🔁 0 💬 0 📌 0

Issue 1: "Existing research has not established what degree of variability in BAG is typical, and what may reflect substantially accelerated or decelerated development"

06.11.2025 10:53 👍 0 🔁 0 💬 1 📌 0
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Current challenges and future directions for brain age prediction in children and adolescents - Nature Communications This Perspective outlines how brain-age prediction models are increasingly applied to child and adolescent populations and examines the specific challenges this entails. It offers practical recommenda...

Pretty good perspective paper on brain age in kids:

www.nature.com/articles/s41...

I think a lot of the points / issues are relevant to the entire field, not only brain age in younger populations.

06.11.2025 10:53 👍 0 🔁 0 💬 1 📌 0
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Exceptional brain PET images from the NeuroEXPLORER: scans with targeted radiopharmaceuticals and comparison to HRRT - European Journal of Nuclear Medicine and Molecular Imaging Purpose Current brain-dedicated positron emission tomography (PET) systems (e.g., the High-Resolution Research Tomograph, HRRT) are unable to accurately and precisely measure pharmacologically-specifi...

Pretty cool development! New high-res neuro-PET scanner. Look at the cortical ribbon and the small subcortical regions and nuclei!

link.springer.com/article/10.1...

06.11.2025 10:09 👍 0 🔁 0 💬 0 📌 0
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Registration opened just 1 week ago and we already have 390+ registrations from more than 25 countries and presenting 85+ papers! We are very excited to see the community support the #EurIPS initiative and look forward to meeting you all in Copenhagen 🙌

08.10.2025 12:11 👍 8 🔁 1 💬 0 📌 0
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Congratulations to everyone who got their @neuripsconf.bsky.social papers accepted 🎉🎉🎉

At #EurIPS we are looking forward to welcoming presentations of all accepted NeurIPS papers, including a new “Salon des Refusés” track for papers which were rejected due to space constraints!

19.09.2025 09:13 👍 50 🔁 16 💬 1 📌 5

Exactly! EurIPS just announced that they will accept submission of those rejected papers.

19.09.2025 09:55 👍 0 🔁 0 💬 0 📌 0