Which device performs interpolation in the imaging chain?

Which device performs interpolation in the imaging chain?

• A. Transducer
• B. Beam Former
• C. Scan Converter
• D. Receiver

Answer: (C)

Interpolation is used when converting the raw sector data into a display-ready image. In ultrasound, echoes are collected along curved scan lines in polar coordinates, producing data that don’t lie on a uniform rectangular grid. The scan converter maps those samples onto a rectangular pixel grid for display and uses interpolation to estimate the values between actual samples and between neighboring scan lines so the image appears continuous and has even spatial spacing. The other components—transducer, beam former, and receiver—handle signal generation, timing, focusing, amplification, and signal processing, but they don’t perform this coordinate-based interpolation for display.

Interpolation is used when converting the raw sector data into a display-ready image. In ultrasound, echoes are collected along curved scan lines in polar coordinates, producing data that don’t lie on a uniform rectangular grid. The scan converter maps those samples onto a rectangular pixel grid for display and uses interpolation to estimate the values between actual samples and between neighboring scan lines so the image appears continuous and has even spatial spacing. The other components—transducer, beam former, and receiver—handle signal generation, timing, focusing, amplification, and signal processing, but they don’t perform this coordinate-based interpolation for display.