Dimitry Tran wanted to be a doctor. Medicine in Australia was costly for international students, he has said, so he studied accounting and finance instead. He graduated top of his class.
He was twenty-two when he and his younger brother Aengus moved from Ho Chi Minh City to Sydney. Aengus was fourteen. Their father was a teacher who had owned one of the first computers in Vietnam, and that machine, they have said, sparked their interest in technology.
Aengus studied in Sydney, with a view at one point to specialising in cardiology.
The brothers both wanted to study medicine. Only one could afford it. Dimitry's university chancellor introduced him to Paul Ramsay, the founder of Ramsay Health Care, and he joined as a strategy consultant, then rose to head of innovation. And with his income, he paid for Aengus's medical degree.
Aengus studied in Sydney, with a view at one point to specialising in cardiology. While still a student he built an AI tool to help choose which IVF embryos to implant. The work showed the brothers something bigger. If AI could do the sorting work of a specialist, it might help a health system short on specialists.
In 2018 they founded Harrison.ai in Sydney. They named it after Dr Tinsley Harrison, the author of Harrison's Principles of Internal Medicine, whose view that caring for another person is the greatest honour and responsibility Dimitry says drives the company. Aengus became CEO. Dimitry took the business side.
The plan worked through partnerships. In 2021 they formed annalise.ai with I-MED Radiology, and later franklin.ai with Sonic Healthcare for pathology. In November 2021 they raised A$129 million, the largest Series B for an Australian start-up at the time. In February 2025 they raised US$112 million, about A$179 million, with the National Reconstruction Fund taking a stake. Its chest X-ray product is cleared for up to 124 findings and its CT brain product for up to 130, with 12 FDA clearances and clearance in 40 countries. Dimitry moved to the US to open the American market.
There is a loop worth noticing here. The brother who could not study medicine built a company that serves doctors, and the one who could study it built the tool. The lesson for founders is not that sacrifice pays. It is that a family's early trade-offs can shape which problem its members end up solving.