What type of shape distortion results when the anatomy is parallel to the IR but the x-ray beam is angled?

What type of shape distortion results when the anatomy is parallel to the IR but the x-ray beam is angled?

• A. Foreshortening
• B. Distortion
• C. Magnification
• D. Elongation

Answer: (D)

When the beam is angled but the anatomy sits parallel to the imaging receptor, the projection of the anatomy onto the receptor becomes stretched along the direction of the beam. This makes the structure appear longer than it actually is, which is elongation. Foreshortening would occur if the anatomy itself were rotated relative to the receptor, causing the image to look shorter. Magnification relates to how far the object is from the receptor, not the beam angle in this setup. So the distortion you’d see here is elongation.

When the beam is angled but the anatomy sits parallel to the imaging receptor, the projection of the anatomy onto the receptor becomes stretched along the direction of the beam. This makes the structure appear longer than it actually is, which is elongation. Foreshortening would occur if the anatomy itself were rotated relative to the receptor, causing the image to look shorter. Magnification relates to how far the object is from the receptor, not the beam angle in this setup. So the distortion you’d see here is elongation.