What is the magnification factor if an x-ray of the sternum measures 9 cm and the actual sternum measures 6 cm?

To determine the magnification factor, the formula used is:

Magnification Factor = Image Size / Object Size

In this case, the image size of the sternum (as seen on the x-ray) is 9 cm, while the actual size of the sternum is 6 cm. Plugging these values into the formula gives:

Magnification Factor = 9 cm / 6 cm = 1.5

This indicates that the image of the sternum is 1.5 times larger than its actual size.

Understanding magnification is crucial in radiology because it affects the clarity and detail of the images produced, impacting diagnosis and treatment planning. A magnification factor greater than 1 indicates the image is enlarged, while a factor of 1 indicates the image is life-sized, and a factor less than 1 would suggest a reduction in size. In this scenario, the correct answer reflects an enlargement of the structure, which is consistent with how x-ray imaging often requires careful adjustment to avoid distortion while still achieving detailed visualization.