The challenge is huge: one has to have the ability to detect one bad tumor cell in 5 billion blood cells. This equate to a requirement to detect 20 million cells per second. "This is a real challenge, but the parallelism that can be realized with semiconductor technology is a tremendous opportunity. We can fabricate thousands of those parallel circuits on one device. This will allow us to create this kind of sensitivity," he said. "The system we are building here is a combination of very sophisticated microfluidics, electronics and very sophisticated on-chip imaging. We also require a lot of compute power because we have to analyze 20 million images per second. It will become possible to realize these kinds of detection systems."