Question

Differences between the Actual and Effective Focal Spot Size:

a. The actual focal spot is larger than the effective focal spot.
b. The effective focal spot is smaller than the actual focal spot.
c. Both focal spots have the same size.
d. Focal spot size is irrelevant in imaging.

Answer 1

The actual focal spot is larger than the effective focal spot, and the effective focal spot is smaller than the actual focal spot. However, both focal spots can have the same size, and sometimes the focal spot size is irrelevant in imaging.

Step-by-step explanation:

The actual focal spot is larger than the effective focal spot.

The effective focal spot is smaller than the actual focal spot.

Both focal spots have the same size.

Focal spot size is irrelevant in imaging.