Focal depth is also known as which two terms?

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Multiple Choice

Focal depth is also known as which two terms?

Explanation:
The focus is the point where the ultrasound beam is narrowest, and the distance from the transducer to that point is the focal depth. In ultrasound terminology, this same distance is called both the focal length and the near zone length. The other terms don’t fit because depth of field describes the range of depths that stay in acceptable focus around the focal point, not the single distance to the focus, and far zone length refers to the region beyond the focus where the beam diverges.

The focus is the point where the ultrasound beam is narrowest, and the distance from the transducer to that point is the focal depth. In ultrasound terminology, this same distance is called both the focal length and the near zone length. The other terms don’t fit because depth of field describes the range of depths that stay in acceptable focus around the focal point, not the single distance to the focus, and far zone length refers to the region beyond the focus where the beam diverges.

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