Lennart D Johns

Variability in effective radiating area and output power of new ultrasound transducers at 3 MHz.

Lennart D Johns, Stephen J Straub, Samuel M Howard, 2007, Journal of athletic training.

Analysis of effective radiating area, power, intensity, and field characteristics of ultrasound transducers.

Lennart D Johns, Stephen J Straub, Samuel M Howard, 2007, Archives of physical medicine and rehabilitation.

Nonthermal effects of therapeutic ultrasound: the frequency resonance hypothesis.

Lennart D Johns, L. Johns, 2002, Journal of athletic training.