| 600 / | HD | SURGERY |
| 300 | DF | DIAGNOSTIC TESTING {38} |
| 407 | DF | .~ Detecting nuclear, electromagnetic, or ultrasonic radiation {11} |
| 437 | DF | .~.~ Ultrasonic {10} |
| 459 | DF | .~.~.~ Structure of transducer or probe assembly {3} |
| 472 | ![]() | .~.~.~.~ With beam directing or shaping means in the wave path (e.g., lens, reflector) |