Calculate the pixel size given these variables: Matrix size = 512 x 512 Field-of-view (FOV) = 12cm Milliamperes (mA) = 5 Kilovoltage peak (kVp) = 78

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Multiple Choice

Calculate the pixel size given these variables: Matrix size = 512 x 512 Field-of-view (FOV) = 12cm Milliamperes (mA) = 5 Kilovoltage peak (kVp) = 78

Explanation:
Pixel size is determined by how many pixels fit across the field of view. You divide the FOV by the matrix size along one dimension. Here, 12 cm FOV with a 512 × 512 matrix gives a pixel size of 12 cm / 512 ≈ 0.0234 cm per pixel, about 0.023 cm (or 0.234 mm). The exposure factors mA and kVp don’t change this geometric size—they affect image brightness and contrast instead. So the correct value is around 0.023 cm per pixel; the other numbers don’t match the FOV divided by 512.

Pixel size is determined by how many pixels fit across the field of view. You divide the FOV by the matrix size along one dimension. Here, 12 cm FOV with a 512 × 512 matrix gives a pixel size of 12 cm / 512 ≈ 0.0234 cm per pixel, about 0.023 cm (or 0.234 mm). The exposure factors mA and kVp don’t change this geometric size—they affect image brightness and contrast instead. So the correct value is around 0.023 cm per pixel; the other numbers don’t match the FOV divided by 512.

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