Which adjustment is NOT related to controlling distortion in imaging?

The adjustment related to controlling distortion in imaging focuses on aspects that directly influence how the image is formed and its geometric accuracy. Changing the focal-spot size, positioning the patient, and altering the tube angle are all critical factors that can impact distortion.

When the focal-spot size is altered, it affects the sharpness of the image. A larger focal spot can result in blurred images, which may lead to distortion, whereas a smaller focal spot can enhance image clarity.

Positioning the patient is vital, as the way a patient is positioned can significantly alter the perspectives of structures being imaged. Incorrect positioning can lead to projectional distortions, resulting in inaccuracies in the representation of anatomy.

Altering the tube angle helps in reducing or managing distortion by ensuring that the central ray aligns appropriately with the structure of interest. This adjustment can minimize the foreshortening or elongation of the anatomical details in the final image.

Adjusting the exposure time, on the other hand, primarily influences the image's brightness and contrast but does not directly affect the geometric distortion of the image. While exposure time can be important in ensuring adequate image quality, it does not alter the fundamental spatial relationships or angles that can lead to distorted images. Thus, it is