Please take a look at the Electrophysical Agents Home Page at http://health.shinshu-u.ac.jp/PT/electro/index.htm . You will find information of dosimetry (as provided by clinical studies) for all the EPA modalities in use. In particular, you question about dosimetry for pulsed SWD is summarised at http://health.shinshu-u.ac.jp/PT/electro/swdstudies.htm
If you have any specific questions, I would be happy to answer them as well.
Goh Ah Cheng, MAppSc (Sydney), PhD candidate (Curtin)
Webmaster and Owner, Electrophysical Agents Home Page