Which condition can lead to shape distortion in a simulator film?

When the object and film are not parallel, this misalignment can cause shape distortion because the angle of incidence changes across the extent of the object. When the object moves closer to or further from the film at varying points, it can result in an image that does not accurately represent the true shape of the object. The spatial relationship between the object being imaged and the film is crucial for obtaining precise images in a simulator; any tilt or angle difference can lead to foreshortening or elongation of the image, thus distorting its shape.

This situation is fundamental in medical imaging, where precision is essential for accurate treatment planning, especially in dosimetry. Ensuring that both the object being scanned and the film are parallel helps mitigate these distortions, leading to more reliable imaging results.