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. Author manuscript; available in PMC: 2007 Sep 28.
Published in final edited form as: Prog Biophys Mol Biol. 2006 Aug 8;93(1-3):212–255. doi: 10.1016/j.pbiomolbio.2006.07.010

Table 5.

FDA's pre-amendments levels of diagnostic ultrasound devices (FDA, 1985)

Derated intensity values
ISPTA (mW/cm2) ISPPA (W/cm2) Im (W/cm2)
Cardiac 430 65 160
Peripheral vessel 720 65 160
Ophthalmic  17 28  50
Fetal imaging and othera  46 65 160
a

Abdominal, intraoperative, small organ (breast, thyroid, testes), neonatal cephalic, adult cephalic.