CR and DR systems' sensitivity to scatter primarily affects:

CR and DR systems' sensitivity to scatter primarily affects:

• A. Image contrast
• B. Image brightness
• C. Image sharpness
• D. Image noise

Answer: (A)

Scatter fogging in digital radiography causes a background signal that washes out differences between tissues. In CR and DR, this additive scatter raises the overall exposure so the grayscale differences between structures—like bone and soft tissue—become less distinct. Because these detectors have a wide dynamic range, you can adjust brightness after the fact, but such window/level adjustments don’t restore the lost contrast that scatter introduces. So the primary effect of scatter sensitivity in CR/DR is reduced image contrast. While brightness and, to a lesser extent, noise or edge definition can be influenced, the key consequence of scatter is diminished contrast between structures.

Scatter fogging in digital radiography causes a background signal that washes out differences between tissues. In CR and DR, this additive scatter raises the overall exposure so the grayscale differences between structures—like bone and soft tissue—become less distinct. Because these detectors have a wide dynamic range, you can adjust brightness after the fact, but such window/level adjustments don’t restore the lost contrast that scatter introduces. So the primary effect of scatter sensitivity in CR/DR is reduced image contrast. While brightness and, to a lesser extent, noise or edge definition can be influenced, the key consequence of scatter is diminished contrast between structures.