iii 
12.1  Transducers .......................................................................................................... 12-1 
12.1.1 Name and Function of Each Part of the Transducer ........................................ 12-2 
12.1.2 Orientation of the Ultrasound Image and the Transducer Head ....................... 12-3 
12.1.3 Procedures for Operating ................................................................................. 12-4 
12.1.4 Wearing the Transducer Sheath ....................................................................... 12-7 
12.1.5 Transducers Cleaning and Disinfection............................................................ 12-8 
12.1.6 Storage and Transportation .............................................................................12-11 
12.2  Biopsy Guide .......................................................................................................12-11 
12.2.1 Needle-guided Brackets ................................................................................. 12-13 
12.2.2 Names of Parts ............................................................................................... 12-14 
12.2.3 Inspection of the Needle-guided Bracket ....................................................... 12-19 
12.2.4 Installing the Needle-guided Bracket .............................................................. 12-19 
12.2.5 Entering Status of Guide Line Adjustment ......................................................  12-23 
12.2.6 Selecting Guide Line ...................................................................................... 12-24 
12.2.7 Adjusting Guide Line....................................................................................... 12-24 
12.2.8 Displaying/hiding Guide Line .......................................................................... 12-24 
12.2.9 Exiting Status of Guide Line Adjustment ........................................................ 12-25 
12.2.10 Removing the Needle-guided Bracket .......................................................... 12-25 
12.2.11 Clean and Sterilize the Needle-guided Bracket ............................................  12-27 
12.2.12 Storage and Transportation ..........................................................................  12-28 
12.2.13 Disposal ........................................................................................................  12-29 
13  System Maintenance .......................................................................... 13-1 
13.1  Maintenance Performed by Users ........................................................................  13-1 
13.1.1 Cleaning ........................................................................................................... 13-1 
13.2  Maintenance Performed by Service Engineers ....................................................  13-2 
13.3  Troubleshooting ....................................................................................................  13-3 
14  Acoustic Power Principle ................................................................... 14-1 
14.1  Concerns with Bioeffects ...................................................................................... 14-1 
14.2  Prudent Use Statement ........................................................................................ 14-1 
14.3  ALARA ..................................................................................................................  14-1 
14.4  Derated Ultrasonic Output Parameters ................................................................ 14-2 
14.5  Measurement Uncertainty .................................................................................... 14-2 
14.6  Parameters Affecting Acoustic Power .................................................................. 14-3 
14.7  Imaging Functions Changing Acoustic Output Power .......................................... 14-3 
14.8  References for Acoustic Power and Safety ..........................................................  14-4