Final answer:
Compared with volume acquisition, axial acquisition through a CT or CAT scanner results in lower partial volume averaging due to the precise cross-sectional images generated by imaging in narrow slices.
Step-by-step explanation:
Compared with volume acquisition, axial acquisition results in lower partial volume averaging. This is because axial acquisition acquires images of the body in narrow slices over a range of directions using a computed tomography (CT) scanner, also known as a computed axial tomography (CAT) scanner. Each 'slice' is acquired individually as the patient moves through the scanner, which allows for detailed cross-sectional images. By doing so, it minimizes the overlap of structures within a slice and provides a more precise representation, thereby reducing partial volume averaging. This is unlike volume acquisition, where larger volumes can lead to more averaging of different tissue densities within a single voxel, potentially obscuring fine details.