If the field of view is 10 cm and the matrix size is 200, what is the pixel size in cm?

Study for the RTBC Fundamentals of Digital Radiography Test. Utilize flashcards and multiple-choice questions with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

If the field of view is 10 cm and the matrix size is 200, what is the pixel size in cm?

Explanation:
Pixel size tells you how much real-world distance each pixel represents. To find it, divide the field of view by the number of pixels along one dimension. With a 10 cm field of view and a 200-pixel matrix, the calculation is 10 cm ÷ 200 = 0.05 cm per pixel, which is 0.5 mm. So the pixel size is 0.05 cm. The other numbers would require different matrix sizes: 0.5 cm would need a 20-pixel matrix across, 0.02 cm would need 500 pixels, and 0.25 cm would need 40 pixels.

Pixel size tells you how much real-world distance each pixel represents. To find it, divide the field of view by the number of pixels along one dimension. With a 10 cm field of view and a 200-pixel matrix, the calculation is 10 cm ÷ 200 = 0.05 cm per pixel, which is 0.5 mm. So the pixel size is 0.05 cm. The other numbers would require different matrix sizes: 0.5 cm would need a 20-pixel matrix across, 0.02 cm would need 500 pixels, and 0.25 cm would need 40 pixels.

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