Which exposure factor is the primary control of radiographic contrast: kVp or mAs?
QUESTION
What is the minimum total filtration required for diagnostic x-ray units operating below 50 kVp?
QUESTION
What is the main trade-off of using higher kVp (with lower mAs) to reduce dose?
Tap to flip before you grade
ANSWER
Reduced subject contrast (more scatter). Higher kVp increases Compton scattering, which flattens the gray scale and diminishes differential absorption in the image.