Brittany Wenger, 17, won the top prize of the 2012 Google Science Fair by creating an artificial “brain” that can diagnose breast cancer with amazing accuracy.Wenger built a neural network — a computer program coded so that it “learns” to process data and detect patterns — that is 99.1 per cent sensitive to malignant growths.
The Sarasota, Florida, native wanted to improve the accuracy of the least invasive diagnostic procedure, called fine needle aspirate, so women don’t have to undergo a second biopsy with a bigger needle or even surgery.
She managed to create a program that is better than three commercially available programs at giving correct diagnoses for cancerous lumps.
Here’s how she did it.
Wenger said creating the network was close to her heart because she has family and friends who have been diagnosed with breast cancer.
Currently fine needle aspirates are the least invasive procedure to diagnose breast cancer, but they are often inadequate.
Wenger aimed to improve the accuracy of this test so doctors wouldn't have to resort to more invasive procedures.
Her network turned out to be better than all three as its false negative rate — how often it says a growth is cancerous when it isn't — is much lower than that of the other models.
Her custom neural network achieved predictive success of 97.4 per cent with 99.1 per cent sensitivity to malignancy.
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