Peter Neil Temple Wells CBE DSc FMedSci FREng FIET FInstP FLSW FRS was a British medical physicist who played a major role in the application of ultrasound technology in medicine. Wells has made a number of notable contributions to the application of engineering and physics in medicine. He is the originator and developer of instruments for ultrasonic surgery and ultrasonic power measurement, as well as the two-dimensional, articulated-arm ultrasonic general purpose scanner and the water-immersion ultrasonic breast scanner.
He demonstrated ultrasonic-pulsed Doppler range gating, and was the discoverer of the ultrasonic Doppler signal characteristic of malignant tumour neovascularisation. He investigated ultrasonic bioeffects and formulated ultrasonic safety guidelines and conditions for prudent use of ultrasonic diagnosis.