https://link.springer.com/article/10.1186/s13195-021-00809-4 https://link.springer.com/article/10.1186/s13195-021-00809-4 (2021) is the second hit on google sch

https://link.springer.com/article/10.1186/s13195-021-00809-4 https://link.springer.com/article/10.1186/s13195-021-00809-4 (2021) is the second hit on google scholar. Sounds a bit more involved than just ultrasound. https://link.springer.com/article/10.1186/s13195-022-00981-1 https://link.springer.com/article/10.1186/s13195-022-00981-1 sounds mildly promising in one way, and disappointing viewed another way...