Kai-Hsiang Chuang

MRI physicist, Functional brain imaging, Biomedical engineering, Neuro

[Kai-Hsiang Chuang @Chuang_Lab]

Amazing breakthrough in understanding functional connectivity!

[Seong-Gi Kim @SeongGi_Kim]

Excited to share our new PNAS paper! 🎉 We examined the neural source of rs-fMRI FC using patterned optogenetic manipulation in mice 🧲🧠. A step toward answering a long-standing question. Fantastic work by @HnSk_Moon @hong_seok_jun @CNIR_IBS https://t.co/YeLFapx6i6

[Thomas Yeo @bttyeo]

1/11 Excited to share our @Naturestudy led by @Leon_Oo1 @csabaorban @ZShaoshi

https://t.co/z51pMIGR5R

It is well-known that AI performance scales with logarithm of sample size (Kaplan, McCandlish 2020), but in many domains, sample size can be # participants or # measurements...

[Kai-Hsiang Chuang @Chuang_Lab]

Intra-cisternal Gd contrast MRI is a gold standard for imaging glymphatic function in vivo. But, a large Area-Under-the-Curve (AUC) is not necessary "high" glymphatic flow. It could be slow efflux, leading to more Gd retention.

For detail: https://t.co/RQPgSMdD3r

[Kai-Hsiang Chuang @Chuang_Lab]

Does cholinergic neurodegeneration impact glymphatic system?
We lesion cholinergic neurons that project to the hippocampus. We find hippocampal, but not cortical, vascular-CSF concordance is impaired, suggesting a causal role.

For detail: https://t.co/uNqnLUoqq5

[Kai-Hsiang Chuang @Chuang_Lab]

We uncover cholinergic deficits in aging affect CSF dynamics using simultaneous fMRI and cholinergic PET scans in healthy elderly.

For details, see https://t.co/9K6jkh2z1K

[Kai-Hsiang Chuang @Chuang_Lab]

Our new findings highlight an important role of cholinergic deficits in glymphatic dysfunction in aging.

https://t.co/xMFKRf7bkV

[Kai-Hsiang Chuang @Chuang_Lab]

Our 6-yr efforts is finally published on Nature Communications!

We discover a neural pathway that regulates the glymphatic system. Its deficit in aging and dementia may result in the pathology. This suggests new targets for diagnosis and treatment.

https://t.co/yMbBCdFuNi

[Kai-Hsiang Chuang @Chuang_Lab]

How is the glymphatic system regulated?
Why it is impaired in aging and Alzheimer’s disease?
Now we have a new answer: the cholinergic neurons!

https://t.co/yMbBCdFuNi

[Meng-Chuan Lai 賴孟泉 @mengchuanlai]

One shall not forget.

[Kai-Hsiang Chuang @Chuang_Lab]

This blew me away

[Ian Shih @ShihYYI]

11/ SORDINO for cross-brain coupling during social behavior 🐭🐭: We developed a dual-mouse hyperscanning platform, enabling simultaneous fMRI of two interacting mice. SORDINO reveals synchronized inter-brain activity in DMN & SN, uncovering neural dynamics of social interactions

[Kai-Hsiang Chuang @Chuang_Lab]

Revolutionary!

[Ian Shih @ShihYYI]

1/ Six years in the making! Our preprint on SORDINO fMRI is out. We're sharing the raw data and sequence to facilitate brain-wide mapping in awake, behaving rodents. If this could be useful to your colleagues and friends, please help spread the word!
https://t.co/cdcP6P9XB5

[Kai-Hsiang Chuang @Chuang_Lab]

This is what’s bugging me about AI denoise. Vendors always show you how pretty the normal human image is improved. But the real issue is whether it will also clean up pathology??

[Paul McCoubrie @PMccoubrie]

Are you using noise reduction software on your CT KUBs?

Beware! We had a near miss recently

Very modern software (this one is a deep-learning algorithm) can smooth out even 7mm calculi

Check your scanner as AI isn’t always that smart

[Kai-Hsiang Chuang @Chuang_Lab]

Insightful study for us working on small sample size:)

[Thomas Yeo @bttyeo]

🚨 Brain Age vs Direct Models in Alzheimer’s disease (AD) 🚨 A thread 🧵

1/ Brain age is a powerful indicator of general brain health, trained on massive datasets. But does this translate to better prediction for specific outcomes, like AD?

Preprint by @twktan : https://t.co/KJgiBq7k2G

[Kai-Hsiang Chuang @Chuang_Lab]

A neat design that addresses the awkward position of rodent body in MRI and results in greatly improved sensitivity of CBF imaging.

[Shemesh Lab @ShemeshL]

Very proud - @sara_pmonteiro (co-supervised by @patricia_mpfig) developed a new experimental setup for higher resolution (>x10 ) CBF mapping in rodents, with sequences by our collaborators Emmanuel Barbier and Lydiane Hirschler https://t.co/xlOqQ0y8xP

Setup designs are provided!

[Kai-Hsiang Chuang @Chuang_Lab]

More rigorous testing like this is needed to design effective nuisance removal methods. Yet, the simulated movement didn’t include the effects of magnetic field change induced by real motion.…

[ApertureNeuro @ApertureOHBM]

Shin et al. assess residual motion artifacts in fMRI data using a simulated motion acquisition sequence with an ex vivo phantom to identify effective nuisance regressors: https://t.co/93rp8zINxy

@afni_pt @mallarchkrvrty1 @fMRI_today @OHBM

[Kai-Hsiang Chuang @Chuang_Lab]

@Valerio_Zerbi @BohacekLab @NatureNeuro Fantastic work!

[Valerio Zerbi @Valerio_Zerbi]

🔔🔵After nearly 5 years from its conception with @BohacekLab, I'm proud to share that our paper on opto-fMRI of the Locus Coeruleus is finally published in @NatureNeuro! Huge thanks to everyone who contributed—including reviewers and editors!
https://t.co/yYDkiuTqha

[Le Bihan Denis @denislb]

Just out from the press, my article for the 40 year anniversary of Diffusion MRI showing how the first years (1984-94) shaped the whole field to investigate the brain and its connectome, normal or diseased, and the body, notably for oncology.
https://t.co/FO9JuBmmzE

[Kai-Hsiang Chuang @Chuang_Lab]

What regulates waste clearance of the brain?
Using human & animal imaging, we identified a neural pathway that modulates BOLD-CSF coupling and glymphatic flux. Its degeneration in aging and dementia could underlie glymphatic deficits.
https://t.co/Izq1mQcc93

[Kai-Hsiang Chuang @Chuang_Lab]

@FangChengYeh @SWarringtonMRI Prisma data looked a bit different from others. We need a gold standard….