What is the magnification factor formula when using image size and object size?

What is the magnification factor formula when using image size and object size?

• A. SID / SOD
• B. Image Size / Object Size
• C. Object Size / Image Size
• D. SOD / SID

Answer: (B)

Magnification tells you how much larger the image is compared with the actual object. When using image size and object size, the magnification factor is the image size divided by the object size. This direct ratio shows how much the object appears enlarged in the image. If you know the distances in a radiography setup, you can also relate magnification to SID over SOD, and that relationship aligns with the size ratio in the right context. The reciprocal ratio (object size divided by image size) would give the inverse magnification, so it’s not the correct form for defining magnification.

Magnification tells you how much larger the image is compared with the actual object. When using image size and object size, the magnification factor is the image size divided by the object size. This direct ratio shows how much the object appears enlarged in the image.

If you know the distances in a radiography setup, you can also relate magnification to SID over SOD, and that relationship aligns with the size ratio in the right context. The reciprocal ratio (object size divided by image size) would give the inverse magnification, so it’s not the correct form for defining magnification.