What it does

• Trains participants in the simulator
• Strap sensor to participant forehead
• They see visual feedback on the screen
• Experimenter can talk them through it

What it does

• Runs AFNI motion correction in realtime
• Shows you 6-degree-of-freedom motion plots

Why you might care

• You know if you need to tell your participant to stop wiggling
• ... or if they're a lost cause and you can stop scanning them

Caveats

• This is not how to properly do motion correction
• We don't save the results for you

What it does

• Simple framewise displacement (FD) graphs
• Customizable thresholds
• Resting state "known good" time prediction

Caveats

• GE testing site
• Fast TRs = no longer always realtime

How DICOM images get from the scanner to useful places (Basic)

• We copy images from the scanner console a processing computer
• The processing computer does... processing
• We use another computer for display

Why do we do this complicated thing?

• The software running on the scanner is very simple
• The processing host can do its job without affecting the scanner
• The processing computer and display computer are in different rooms

How images get from the scanner to useful places (Advanced)

• The scanner uses NFS to connect to the processing computer
• The scanner runs a script that watches for new DICOMs and copies them to the processing computer
• This script looks at the pulse sequence name and only copies fMRI DICOMs

How DICOM images get from the scanner to useful places (Advanced)

• The display computer connects to the processing computer via SSH and runs a script
• This script watches the target directory for new DICOMs
• When it finds one, it starts Realtime AFNI
• When that ends, it tries to clean up the files that got created
• Once a day, old files get purged

Source code is available!

https://github.com/uwmadison-chm/ge-mri-rtafni

Why should you care?

• We're doing realtime motion information
• ... but you can do whatever you want
• Biofeedback fMRI? Something even cooler?
• You just need to be able to handle a stream of DICOM images
• Get in touch if you want to try