What does "geometric distortion" refer to in radiographic imaging?

Geometric distortion in radiographic imaging specifically refers to the misrepresentation of the size or shape of the object being imaged. This occurs when there are discrepancies in the alignment between the x-ray source, the object, and the image receptor. For instance, if an object is not perpendicular to the x-ray beam, it may appear elongated or compressed, which results in a distortion of its true shape.

When imaging, accurate representation is crucial for diagnostics and treatment planning, as any misrepresentation can lead to misdiagnosis or inappropriate management of conditions. Understanding the principles of geometric distortion helps radiographers and technologists select the proper positioning and technical factors to minimize distortion and ensure that the images accurately reflect the anatomical features of interest.