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Maarten Poirot

Hi, I’m an AI researcher and healthcare professional. At DeepHealth, I support research collaborations around the world. Here I share personal views and write about published research for a general audience, side projects, sport, and travel. Feel free to .

Connectle

Play this path-finding puzzle, solve it programmatically and discover why the same problem matters in chip design.

A public UTMB race data set

I scraped 38,461 UTMB-indexed races and 7.1 million participants, then published the data and built a Race Finder to explore it.

The game Pickomino

Play Pickomino against the computer, then use the probability tables to make better choices on every roll.

A scanner took down WordPress

How a bot scanning non-existing URLs filled Apache's scoreboard on a small AWS Lightsail Bitnami WordPress instance, and what fixed it.

SilverBullet

A lightweight, break-resistant knowledge base for my server, plus four Space Lua snippets I wish had existed before I had to write them.

RAG App for Local PDFs

Build a local-PDF question-answering app with AWS Bedrock, ChromaDB and Flask, from document indexing to generated responses.

3D Brains in Blender

Turn FreeSurfer cortical data into publication-ready 3D brain renders in Blender, reproducibly and entirely through Python.

Free, safe & static email

Build a free, spam-protected contact form for a static React site using reCAPTCHA, API Gateway, Lambda and SES.

React audio player

Build a minimalist React audio player with no dependencies beyond React, complete with a working demo and play/pause walkthrough.

Dynamic maps from GPX

Turn every GPX file in a Gatsby project into an interactive Leaflet map page automatically, with one GraphQL-powered template.

Secure files in WordPress

WordPress login protection stops at the page: media files remain directly scrapeable unless Apache and PHP validate access too.

Stability of MRI features

Does the software you use to outline brain regions change what radiomics can predict, and why manual feature extraction still matters in the deep learning era.

Distributed machine learning

Split a neural network across institutions so they can train one model collaboratively without exchanging raw data.

Reconstruction of CT with deep learning

A physics-informed ResNet reconstructed non-contrast images from dual-energy CT more accurately than conventional reconstruction.

Clustering songs

Use Spotify's audio features and high-dimensional clustering to find the songs that do not belong in a playlist.

Autoencoder compression

Medical images contain enormous redundancy; I test whether a domain-specific autoencoder can use it to beat JPEG and PNG.

Multi-organ segmentation

A 2.5D U-Net can automate pelvic organ contours that otherwise take a specialist up to eight hours to draw.

Transaction classification

Classify bank transactions faster by combining domain rules, Bayesian predictions, confidence scores and a Plotly supervision interface.

76k Verbier Trail Run

I finished 76 km and 5,300 m of climbing through Verbier; this is where the race hurt, what worked and what runners facing its 20% DNF rate should know.

Downgrade AWS Lightsail

AWS Lightsail cannot downgrade an instance because cheaper bundles have smaller disks. Here is the four-step backup-and-restore route around that limitation.

60k Dobbeltravern Trail Run Near Oslo

I finished a 60 km trail ultra through Oslo's Nordmarka in just over six hours, with zero trail preparation and a few grocery-store Snickers.

Photo tagging

Make an unsearchable photo archive searchable by using AWS Rekognition to tag every image and a web interface to query the results.

Static site development

A first-time Gatsby build: Markdown content, local previews and a GitHub workflow that deploys every commit to S3.

This sites backend

Trace a request to this site through Route 53, CloudFront and S3 to see how static hosting stays free and fast.

Scope of this site

A personal website trades platform reach for creative freedom, and gives me a place to return the practical generosity I have found online.

Ironman Vichy

I made a full Ironman my first triathlon, then finished its marathon in under four hours despite heat, sickness and a chaotic swim.

Set passwords in WordPress

Stop WordPress sending plain text passwords.

Measuring the retina

How a two-week failed replication turned into a new way to measure Bruch's membrane calcification in Pseudoxanthoma Elasticum on OCT.

Hiking Corsica, GR20

144 km and 9,600 m of climbing across Corsica's GR20: a knee injury, a solo scramble up Monte Cinto and a night so cold we broke camp at 5am.

Cycling to Rome

Three students, €350 bikes and 2,400 km from Maastricht to Rome: the route, daily distances, surviving gear and lessons from 34 days on the road.