1. Rationale and derivation of MI and TI —A review;Abbott;Ultrasound Med Biol,1999
2. AIUM 1999. Official Statements and Reports of the American Institute of Ultrasound in Medicine. http://www.aium.org/stmts.htm.
3. AIUM Medical ultrasound safety. AIUM Publications, 1994 American Institute of Ultrasound in Medicine, 14750 Sweitzer Lane, Suite 100, Laurel, MD 20707, USA.
4. AIUM Safety Considerations for Diagnostic Ultrasound. Bioeffects Committee of the American Institute of Ultrasound in Medicine. 1991 AIUM Publications, 14750 Sweitzer Lane, Suite 100, Laurel, MD 20707, USA
5. AIUM website. http://www.aium.org/