Which of the following will produce the highest spatial resolution?

• A. Large matrix and high pitch
• B. Large matrix and low pitch
• C. Small matrix and low pitch
• D. Small matrix and high pitch

Answer: (B)

High spatial resolution comes from recording the finest detail, which depends on how small each pixel is. A large matrix means more pixels across the same field of view, so each pixel is smaller. A low pitch indicates closer pixel centers and therefore smaller pixel size as well. Together, a large matrix and low pitch give the smallest pixel size, allowing the system to distinguish finer details and produce the highest spatial resolution. If the matrix is small or the pitch is high, pixels are larger and detail is less defined. Note that real-world resolution can be limited by factors like focal spot size and motion, but among the options this combination yields the sharpest image.