1942 – Karl Theodore Dussik, an Austrian neurologist and psychiatrist at the University of Vienna, uses ultrasonic beams transmitting through the head to diagnose brain tumors (Hyperphonography). Dussik becomes the pioneer of diagnostic ultrasound.
Karl Theodore Dussik
1947 – Dussik develops an apparatus to make images of the brain and ventricles using heat sensitive paper to record the echoes of the ultrasonic transmissions. The images are called ‘ventriculograms‘.
1948 – The First Congress of Ultrasound in Medicine meets in Erlangen, Germany. Karl Dussik and Wolf-Dieter Keidel are the only two individuals to present on the use of ultrasound in medical diagnostics. The other individuals present discuss ultrasound in therapeutics