1. Bioeffects and Safety of Diagnostic Ultrasound;AIUM,1993
2. Standard for Real-time Display of Thermal and Mechanical Acoustic Output Indices on Diagnostic Ultrasound Equipment;AIUM/NEMA,1993
3. Ultrasonics — Field Safety — Part 1: Classification Scheme for Medical Diagnostic Fields;IEC;International Electrotechnical Commission Committee Draft 87/62B(Sec.)63/218,1994
4. Acoustic Output Measurement and Labeling Standard for Diagnostic Ultrasound Equipment;AIUM/NEMA,1992
5. Acoustic Output Measurement Standard for Diagnostic Ultrasound Equipment;AIUM/NEMA,1992