Question

How does an increase in kVp affect the SCALE of Contrast?

A) Increases the scale of contrast.
B) Decreases the scale of contrast.
C) Has no effect on the scale of contrast.
D) Causes inversion of the scale of contrast.

Answer 1

Increasing kVp decreases the scale of contrast in radiographic imaging, resulting in more gray shades and less distinction between tissues in the image.

Step-by-step explanation:

When considering the effect of increasing kilovoltage peak (kVp) on the scale of contrast in radiographic imaging, an increase in kVp results in a decrease in the scale of contrast.

This is because higher kVp levels lead to a greater number of photons passing through the subject and reaching the detector, reducing the contrast between different tissues by making the image grayer and producing more gradations between black and white. Therefore, the correct answer is B) Decreases the scale of contrast.