Banding artifacts can result from which setting error?

Banding artifacts can result from which setting error?

• A. Dead transducer element
• B. Incorrect TGC
• C. Incorrect master gain
• D. Incorrect focal zone position

Answer: (B)

Banding artifacts come from mismatches in depth-dependent amplification. Time-gain compensation adjusts how loudly echoes from deeper regions are received, to compensate for the natural attenuation of tissue. If that compensation is set incorrectly, some depth ranges end up being over-amplified while others are under-amplified. The result is horizontal bands of alternating brightness that span across the image—banding. A dead transducer element would cause missing data or localized shadowing, not a uniform banding pattern. The master gain controls overall brightness of the entire image, so it wouldn’t create depth-specific bands. The focal zone position mainly affects lateral resolution at and near the focal depth, not producing horizontal depth-wise banding across the image.

Banding artifacts come from mismatches in depth-dependent amplification. Time-gain compensation adjusts how loudly echoes from deeper regions are received, to compensate for the natural attenuation of tissue. If that compensation is set incorrectly, some depth ranges end up being over-amplified while others are under-amplified. The result is horizontal bands of alternating brightness that span across the image—banding.

A dead transducer element would cause missing data or localized shadowing, not a uniform banding pattern. The master gain controls overall brightness of the entire image, so it wouldn’t create depth-specific bands. The focal zone position mainly affects lateral resolution at and near the focal depth, not producing horizontal depth-wise banding across the image.