v
The ALARA Principle ...........................................................................137
Applying ALARA ..........................................................................137
Direct Controls ...............................................................................138
Indirect Controls ............................................................................138
Receiver Controls ...........................................................................138
Output Display ......................................................................................139
Related Guidance Documents .....................................................140
Acoustic Output Measurement ...........................................................140
In Situ, Derated, and Water Value Intensities ...........................141
Tissue Models and Equipment Survey ......................................141
Intended Uses ........................................................................................142
About the Acoustic Output Table .......................................................144
Acoustic Output Tables ................................................................146
Global Maximum Derated ISPTA and MI Values ....................155
Acoustic Measurement Precision and Uncertainty ..................157
Labeling Symbols ..................................................................................158
Chapter 7: Troubleshooting and Maintenance
Troubleshooting ....................................................................................161
Software Licensing ................................................................................163
Obtaining a License Key ......................................................................169
Installing a License Key ........................................................................170
Maintenance ...........................................................................................171
Recommended Disinfectant .........................................................171
Safety ...............................................................................................171
Cleaning and Disinfecting the Ultrasound System ..................172
Cleaning and Disinfecting Transducers .....................................173
Sterilizable Transducers ...............................................................174
Cleaning and Disinfecting Transducer Cables ..........................175
Cleaning and Disinfecting the Battery .......................................176
Chapter 8: References
Display Size ............................................................................................189
Caliper Placement .................................................................................189
2D Measurements .................................................................................189
Sources of Measurement Errors ..........................................................191
Acquisition Error ...................................................................................191
Algorithmic Error ..................................................................................191
Terminology and Measurement Publications ...................................191
Cardiac References ................................................................................192
Obstetrical References ..........................................................................196
Gestational Age Tables .................................................................197
Growth Analysis Tables ...............................................................199
Ratio Calculations ..........................................................................200
General References ................................................................................201
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