Have you considered how the following factors influence a modality's treatment efficacy?
Energy Delivered –
Is it enough to provide a therapeutic dose?
The greatest amount of energy provided by Ultrasound and Laser units is at the patient/device interface with the energy dissipating as it travels away from the energy source. Energy dissipation influences depth of penetration and is an uncontrollable variable that limits efficacy
Are you treating the correct area?
Ultrasound and Laser therapy do not employ patient bio-feedback for pin-pointing the source of pain and treatment location. Treating an area described as painful by a patient may result in completely missing the true source of pain rendering the treatment ineffective.