Jan Somer achieved his MSc degree in Electrical Engineering at Delft University of Technology in 1960. In 1961 he started at the Institute of Medical Physics -TNO in Utrecht.
Initially his work consisted of supporting neurologists experimenting with ultrasound for imaging the brain. The A-scan was relatively successful because it was real-time. Unfortunately it was only one-dimensional. The B-scan was two-dimensional but not real-time and failed for imaging the brain.
This convinced him that only a phased-array system which is real-time and two-dimensional would solve the problem. He developed a prototype, the Electroscan, that was presented at the 1st WFUMB 1969. This is now exactly fifty years ago.