| 600 / | HD | SURGERY |
| 300 | DF | DIAGNOSTIC TESTING {38} |
| 407 | DF | .~ Detecting nuclear, electromagnetic, or ultrasonic radiation {11} |
| 437 | DF | .~.~ Ultrasonic {10} |
| 443 | DF | .~.~.~ Anatomic image produced by reflective scanning {3} |
| 445 | ![]() | .~.~.~.~ Mechanical scanning {1} |
| 446 | DF | .~.~.~.~.~> Hand-held unit |