fMRI from zero
The pictures from the fMRI lessons that you can click, drag and animate. Each page works on its own and links back to the lessons that use it.
Hydrogen and the MR signal
Switch the magnet on, tip the protons with a radio pulse and watch the signal they give back
Oxygen and the BOLD signal
Follow the chain from active neurons to blood flow to a brighter MR signal
The haemodynamic response
Build a task and see the slow, delayed BOLD response the scanner will record
Brain regions and networks
Click a region to see what it does, which network it belongs to and where fMRI struggles
Signal lost and recovered
Watch spins fall out of step, then bring part of the signal back with an echo
From k-space to a 4D image
Fill k-space line by line and see the image appear, slice by slice, volume by volume
Scanners and kinds of scans
Compare 1.5, 3 and 7 tesla, and see what multiband, ASL and resting-state scans change
Noise in, noise out
Add motion, breathing, heartbeat and drift to a voxel, then clean them out step by step
From time series to connectivity
Turn ROI time series into a correlation matrix, a graph and a feature vector for a model
Disease patterns and evidence
Pick a disorder to see the reported fMRI pattern and how strong the evidence is
The fMRI data pipeline
Walk from DICOM to a model, with data shapes, tools and pitfalls, and size your storage