Prof Hossam Haick of Israel’s Technion and his team have developed a new method for monitoring molecular processes deep within tissue. Their system uses chemical tomography to analyze volatile organic compounds (VOCs). It can help early cancer detection in many organs of the body.

https://www.technion.ac.il/en/blog/article/breakthrough-in-noninvasive-monitoring-of-molecular-processes-in-deep-tissue/