Calculate the pixel size given these variables: Matrix size = 512 x 512; FOV = 12 cm.

Calculate the pixel size given these variables: Matrix size = 512 x 512; FOV = 12 cm.

• A. 0.000046 cm
• B. 0.023 cm
• C. 0.117 cm
• D. 42 cm

Answer: (B)

Pixel size is the distance from one pixel center to the next, found by dividing the field of view by the number of pixels along one side of the image. With a 12 cm field of view and a 512 × 512 matrix, the pixel size is 12 cm / 512 = 0.0234375 cm per pixel, which rounds to about 0.023 cm (roughly 0.234 mm). This aligns with the given correct option. The other values don’t fit because they would require a different division of the 12 cm field of view among the 512 pixels along one axis (for example, a much smaller or much larger pixel size would imply a different matrix or FOV than what’s provided).

Pixel size is the distance from one pixel center to the next, found by dividing the field of view by the number of pixels along one side of the image. With a 12 cm field of view and a 512 × 512 matrix, the pixel size is 12 cm / 512 = 0.0234375 cm per pixel, which rounds to about 0.023 cm (roughly 0.234 mm). This aligns with the given correct option. The other values don’t fit because they would require a different division of the 12 cm field of view among the 512 pixels along one axis (for example, a much smaller or much larger pixel size would imply a different matrix or FOV than what’s provided).