Research & teaching

Use Cathra in your class

A 45-minute lesson on what image AI can and can’t do in medicine.

1. Introduce (10 min). What a classifier does: it compares an image to patterns it learned. Read the How it works page together.
2. Explore (15 min). Students run the tool on a few images, then on something that isn’t an ultrasound, and note what happens.
3. Discuss (15 min). Use the questions below.
4. Reflect (5 min). Each student writes one thing a tool like this should never be used for.

Discussion questions

• Why is a similarity score not the same as the chance someone has a condition?
• The tool still scores a photo of a cat. What does that tell you about AI models?
• What could go wrong if a model is trained on images from only one source?
• Who should be responsible when a medical AI tool is wrong?
• Why might it matter that Cathra runs on your device instead of a server?

How to cite Cathra

If you use the training data, also cite the PCOSGen dataset (see dataset credit).

For schools and labs

Interested in a version for your school, class, or lab? Email paultaaron@icloud.com with your organization’s name and how you plan to use it.