Which focusing method uses a curved lens or backing to shape the beam?

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Prepare for the Ultrasound Transducers Test with flashcards and multiple-choice questions. Each question includes hints and explanations to help you pass with confidence.

Multiple Choice

Which focusing method uses a curved lens or backing to shape the beam?

Explanation:
Focusing by a curved lens or backing relies on the transducer’s physical shape to bend and concentrate the ultrasound beam. A curved lens at the front or a curved backing alters the wavefront so it converges to a focal point inside the tissue, improving resolution at that depth. Because the focus is built into the hardware, it’s fixed and cannot be adjusted during scanning without swapping the transducer. This is different from methods that shape the beam electronically or dynamically, which adjust focus through timing or processing rather than physical curvature.

Focusing by a curved lens or backing relies on the transducer’s physical shape to bend and concentrate the ultrasound beam. A curved lens at the front or a curved backing alters the wavefront so it converges to a focal point inside the tissue, improving resolution at that depth. Because the focus is built into the hardware, it’s fixed and cannot be adjusted during scanning without swapping the transducer. This is different from methods that shape the beam electronically or dynamically, which adjust focus through timing or processing rather than physical curvature.

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