Author | Lightnews

Peder Larson

@pezlarson.bsky.social

90 followers 81 following 21 posts

Professor of Radiology and Biomedical Imaging at UCSF Mostly #MRI methodology research, including metabolic imaging, lung imaging and myelin imaging

Posts Media Videos Starter Packs

Pinned

Peder Larson @pezlarson.bsky.social · Mar 1

Hi bluesky, my name is Peder and I am happy to be here. So nice to be somewhere that feels inviting, respectful, insightful and democratic

If you want to learn more about me and my teams interests check out
larsonlab.github.io

Home

Advanced Medical Imaging Technology Research

larsonlab.github.io

Reposted by Peder Larson

Mark Lescroart @neuromdl.bsky.social · 27d

If you like this demo, you will love the great demos by @pezlarson.bsky.social that can be found here:

larsonlab.github.io/MRI-educatio...

(Complete with python code to generate them!)

1 9

Peder Larson @pezlarson.bsky.social · Sep 16

Yes definitely will be some improvement! particularly for diffusion MRI the image should be better quality, and also some more precise measurements of cancerous tissue

1 1

Reposted by Peder Larson

Aurora Clark @chemnetworks.bsky.social · Sep 16

On a positive note - Happy Pythagorean Triple Square Day :) #math #MATH
www.npr.org/2025/09/16/n...

On 9/16/25, celebrate a date of mathematical beauty

Pythagorean Triple Square Day, as one man affectionately calls 9/16/25, is a day like no other this century.

www.npr.org

3 3

Peder Larson @pezlarson.bsky.social · Aug 28

This is a great analysis, especially I like the assessment of different variables on performance in detecting aggressive prostate cancer from MRI

important for ML Researchers to see work like this where real world AUCs ~0.7, showing often fundamental challenges in biomedical problems

Radiology: Artificial Intelligence @radiology-ai.bsky.social · Aug 28

#ThrowbackThursday – #DeepLearning models predicted #prostate cancer aggressiveness on #MRI (Apr 2025) https://doi.org/10.1148/ryai.230555 #AI #MachineLearning #ArtificialIntelligence

Image from article in Radiology: Artificial Intelligence

1 2

Reposted by Peder Larson

Science X / Phys.org @sciencex.bsky.social · Aug 27

Advances in 2D materials are enabling atomic-scale resolution in NMR spectroscopy, offering new possibilities for quantum sensing, computing, and communications. doi.org/g9zm6v

MRI technology inspires quantum advancement with 2D materials

The same technology behind MRI images of injury or disease also powers nuclear magnetic resonance (NMR) spectroscopy, which is used to analyze biological molecules for research on diseases and therapeutics.

phys.org

2 4

Reposted by Peder Larson

UCSF Center for Intelligent Imaging @ucsfci2.bsky.social · Aug 26

Dr. Peder Larson (@pezlarson.bsky.social) will host @ucsfci2.bsky.social's Segmentation Tools Seminar!

🗓 Wednesday, September 24

🕒 3:00 - 4:30 p.m.

📍Genentech Hall Auditorium or Zoom

See you there!

2 2

Reposted by Peder Larson

National MagLab @nationalmaglab.bsky.social · Aug 11

It's back to school time!
Check out our Magnet Academy site for free science learning resources!

Magnet Academy - Magnet Academy

Magnet Academy is a free resource on magnetism, electricity and the nature of science brought to you by the National High Magnetic Field Laboratory.

buff.ly

2 3

Peder Larson @pezlarson.bsky.social · Aug 11

The prostate cancer #MRI field is embracing sharing and leveraging datasets across institutions for training AI models. Preprint of this recently accepted federated learning exploration:
arxiv.org/abs/2507.22790

Reposted by Peder Larson

@wsuchemistry.bsky.social @waynestatechem.bsky.social · May 27

On the cover! The Chekmenev Lab & coworkers: “Carbon-13 Hyperpolarization of α-Ketocarboxylates with Parahydrogen in Reversible Exchange” in ChemMedChem. @chemistryeurope.bsky.social #wsuchemistry #ChemSky #NMRchat #MRI

1 3 5

Reposted by Peder Larson

JAMA @jama.com · May 19

🧵A new COPD diagnostic schema that includes chest imaging, respiratory symptoms, and spirometry identified more high-risk individuals and excluded low-risk ones. #ATS2025

ja.ma/4dp9i30

1 10 37

Peder Larson @pezlarson.bsky.social · May 14

Nice to see my @ucsfimaging.bsky.social colleague highlighted! Prof. Vu has been innovating higher resolution brain #MRI and getting this technology into the hands of VA doctors

Northern California Institute for Research and Education, Inc. @ncire.org · May 13

This VA Research Week, May 13th-16th, NCIRE celebrates its contribution to 100 Years of VA Research.

NCIRE is proud to support the research of Dr. An Vu at the San Francisco VA Health Care System!

Learn more: www.ncire.org/about-ncire
#VAResearch100

Peder Larson @pezlarson.bsky.social · May 12

Open source #MRI is thriving at #ISMRM2025 - even the standing room was full at educational session today! 🎉

1 1 4

Reposted by Peder Larson

layerfmri.bsky.social @layerfmri.bsky.social · Apr 30

New layer-fMRI paper showing 3D-EPI with variable sampling density at 0.56mm resolution. Acquired at the Feinbergatron scanner.
By Park et al.,
doi.org/10.1002/mrm....

1 2 12

Reposted by Peder Larson

Gabriel Bosslet @gbosslet.bsky.social · Apr 23

Well the NIH has cancelled the Women's Health Initiative, the largest study of women in history

It has been running continuously since 1991 and has provided massive key knowledge about diseases in women

Unreal

www.science.org/content/arti...

NIH cancels its first and largest study centered on women

The Women’s Health Initiative has produced numerous influential findings

www.science.org

130 1.8K 2.7K

Reposted by Peder Larson

Sarah Tuttle @niais.bsky.social · Apr 20

Happy to walk anyone through this. Our grants are proposed work. We often budget for things like salaries, student tuition, and equipment and consumables (in my field). We work on tight margins - we're often asked to "trim" or modify budgets because program officers try to spread the money.

Maya Sen @mayasen.bsky.social · Apr 18

Ok so yeah, this has quickly become the #1 misunderstanding about the canceled grants

the grants are not “subsidies” or “entitlements” to Harvard or Princeton or whatever

they aren’t going into universities’ endowments

they are competitive contracts won by these universities to do research

Maya Sen @mayasen.bsky.social · Apr 15

There is a PR narrative quickly emerging about “entitlement” of elite universities, as if this $ is some sort of subsidy

Harvard & others must counter this quickly

The $ doesn’t flow into Harvard’s coffers - this is grant money, most of which goes to research the govt has agreed has social value

2 40 110

Reposted by Peder Larson

Magnetic Resonance News @nmr900.bsky.social · Apr 21

RT @songihanlab The official flier for the new GRC on Magnetic Resonance and Quantum Information Science, June 14-19, 2026, Southern New Hampshire University, MA. Details TBA over time, looking for support from vendors and institutions www.grc.org/magnetic-res... #NMRevents #NMRchat #NMR 🧲

1 2

Peder Larson @pezlarson.bsky.social · Apr 17

Both papers reconstruct phase-resolved lung MRI with motion-compensated low rank (MoCoLoR) reconstruction algorithm

Available here:
github.com/PulmonaryMRI...

developed at @ucsfimaging.bsky.social Stanford Radiology
and UC Berkeley EECS

GitHub - PulmonaryMRI/MoCoLoR: Motion-compensated low-rank reconstruction for simultaneous structural and functional UTE lung MRI doi: 10.1002/mrm.29703

Motion-compensated low-rank reconstruction for simultaneous structural and functional UTE lung MRI doi: 10.1002/mrm.29703 - PulmonaryMRI/MoCoLoR

github.com

Peder Larson @pezlarson.bsky.social · Apr 17

analyticalsciencejournals.onlinelibrary.wiley.com/doi/abs/10.1...

Uses 3D radial UTE, comparisons focused on HP Xe in healthy volunteers and CF patients

@ucsfimaging.bsky.social @bcch-mri-research.bsky.social

Three‐Dimensional Free‐Breathing Ultrashort Echo Time (UTE) 1H MRI Regional Ventilation: Comparison With Hyperpolarized 129Xe MRI and Pulmonary Function Testing in Healthy Volunteers and People With C...

129Xe and 1H anatomical images were acquired with breath-holding, and Xe VDP was computed. UTE 1H MRI was acquired with 3D radial k-space under free-breathing and reconstructed into respiratory-resol....

analyticalsciencejournals.onlinelibrary.wiley.com

Peder Larson @pezlarson.bsky.social · Apr 17

onlinelibrary.wiley.com/doi/full/10....

uses 3D FLORET trajectory, and ventilation processing from PREFUL (phase-resolved functional lung) method

Compelling examples in CF, LAM, BOS, and Post-HSCT with HP Xe comparisons

@cincykidsrad.bsky.social

Quantifying spatial and dynamic lung abnormalities with 3D PREFUL FLORET UTE imaging: A feasibility study

Purpose Pulmonary MRI faces challenges due to low proton density, rapid transverse magnetization decay, and cardiac and respiratory motion. The fermat-looped orthogonally encoded trajectories (FLORE.....

onlinelibrary.wiley.com

1 1

Peder Larson @pezlarson.bsky.social · Apr 17

Two new papers on lung structure and ventilation #MRI with 3D UTE methods, inc patient results

My impressions
- UTE methods (indirect) not as good as HP Xe (direct, but requires inhaled and hyperpolarized gas)
- sequences maturing, processing is critical
- great potential for lung dz evaluation

1 2

Peder Larson @pezlarson.bsky.social · Apr 17

👀👇
"In this risk model, the 93 million CT examinations performed in 62 million patients in 2023 were projected to result in approximately 103 000 future cancers."
work from @ucsfimaging.bsky.social

storrisi.bsky.social @storrisi.bsky.social · Apr 16

jamanetwork.com/journals/jam...

Projected Lifetime Cancer Risks From Current Computed Tomography Imaging

This risk model projects how many future cancers in the United States could result from annual computed tomography examinations.

jamanetwork.com

Peder Larson @pezlarson.bsky.social · Apr 17

@brukercorporation.bsky.social - could this award be coupled with sequence sharing support to expand impact of work and accelerate research progress?

Peder Larson @pezlarson.bsky.social · Apr 17

I think this #MRI award from @brukercorporation.bsky.social is a really nice way to recognize novel preclinical sequence work! Past winners include hot topics of ZTE/UTE, hyperpolarized, CEST, MRF, deuterium

Magnetic Resonance News @nmr900.bsky.social · Apr 17

RT @brukercorporation.bsky.social The finalists for this year's Bruker MRI Award have been chosen! We've narrowed it down to the top 3 finalists. It's your last chance to vote for your favorite! Cast your vote: www.bruker.com/en/landingpa... Voting will remain open until April 18 #NMRchat #MRISky 🧲

MRI Award 2025

Bruker honors researchers in the field of preclinical imaging with our MRI Award which is presented at the ISMRM Conference.

www.bruker.com

1 1 2

Peder Larson @pezlarson.bsky.social · Apr 2

Code for both projects 💾
github.com/tblazey/x_epi
github.com/Xiaoxi-Liu/C...

1 1

Peder Larson @pezlarson.bsky.social · Apr 2

This adds to work from WashU on EPI sequences
onlinelibrary.wiley.com/doi/10.1002/...

A vendor‐neutral EPI sequence for hyperpolarized 13C MRI

Purpose To develop a flexible, vendor-neutral EPI sequence for hyperpolarized 13C metabolic imaging. Methods An open-source EPI sequence consisting of a metabolite-specific spectral-spatial RF exci.....

onlinelibrary.wiley.com

1 1