When the anatomy is parallel to the image receptor and the X-ray beam is angled, what type of distortion occurs?

When the anatomy is parallel to the image receptor and the X-ray beam is angled, what type of distortion occurs?

• A. foreshortening
• B. elongation
• C. magnification
• D. minification

Answer: (B)

When the anatomy is parallel to the image receptor, angling the X-ray beam causes the projection of the structure to be stretched on the image. The rays strike the part obliquely, so the shadow or silhouette that lands on the receptor is longer than the actual object, making features appear elongated. This happens because the length is projected along the beam path onto the receptor, increasing perceived length. If the beam were perpendicular to the object or if the object were angled toward the receptor, you’d see foreshortening instead; magnification comes from being farther from the receptor, not from angling the beam with the part parallel. So the distortion produced in this scenario is elongation.

When the anatomy is parallel to the image receptor, angling the X-ray beam causes the projection of the structure to be stretched on the image. The rays strike the part obliquely, so the shadow or silhouette that lands on the receptor is longer than the actual object, making features appear elongated. This happens because the length is projected along the beam path onto the receptor, increasing perceived length. If the beam were perpendicular to the object or if the object were angled toward the receptor, you’d see foreshortening instead; magnification comes from being farther from the receptor, not from angling the beam with the part parallel. So the distortion produced in this scenario is elongation.