A repeating pattern in the far field is most likely caused by:

A repeating pattern in the far field is most likely caused by:

• A. Damage to the lens or transducer crystals
• B. Electrical interference pattern
• C. Damaged connector pins
• D. Malfunction of the transmitter

Answer: (B)

A repeating pattern in the far field points to electrical interference affecting the received signal. In ultrasound, patterns that repeat regularly across the image are typically caused by external electrical noise rather than actual tissue structures. This kind of interference comes from EMI, grounding issues, or nearby electronic devices, and it shows up as stable stripes or bands in the far field because the unwanted signal combines with the true echoes in a consistent, periodic way. If the problem were due to the transducer itself, such as damaged crystals or a damaged lens, you’d expect degraded focus or irregularities tied to the physical elements rather than a clean, repeating pattern. A bad connector might cause intermittent signal loss, and a transmitter malfunction would alter the pulse itself rather than create a regular, patterned artifact in the far field. So the repeating, orderly pattern is most consistent with electrical interference. To reduce it, check shielding and grounding, minimize EMI sources, and ensure proper cabling and connections.

A repeating pattern in the far field points to electrical interference affecting the received signal. In ultrasound, patterns that repeat regularly across the image are typically caused by external electrical noise rather than actual tissue structures. This kind of interference comes from EMI, grounding issues, or nearby electronic devices, and it shows up as stable stripes or bands in the far field because the unwanted signal combines with the true echoes in a consistent, periodic way. If the problem were due to the transducer itself, such as damaged crystals or a damaged lens, you’d expect degraded focus or irregularities tied to the physical elements rather than a clean, repeating pattern. A bad connector might cause intermittent signal loss, and a transmitter malfunction would alter the pulse itself rather than create a regular, patterned artifact in the far field. So the repeating, orderly pattern is most consistent with electrical interference. To reduce it, check shielding and grounding, minimize EMI sources, and ensure proper cabling and connections.