Which variable changes in a set of coronal images when altering image attributes?

The correct choice involves understanding how image attributes affect the representation of coronal images in CT scanning. The digital matrix size refers to the dimensions of the pixel array that comprises the image itself. When the digital matrix size is altered, it directly affects the resolution and clarity of the images displayed.

Increasing the digital matrix size leads to smaller pixel sizes and therefore finer detail in the images. Conversely, decreasing the matrix size increases pixel size, which can reduce the image detail. This is significant in coronal images because it allows for the precise representation of anatomical structures in different planes, impacting diagnostic capabilities. Thus, the adjustment of the digital matrix size results in a noticeable change in how coronal images appear.

Other variables, such as reconstruction slice thickness, acquisition thickness, and window level, also influence image quality and characteristics but do not specifically address the change in the structure of the coronal images through the pixel arrangements like digital matrix size does.