Which statement about grid usage is true?

Which statement about grid usage is true?

• A. Using a Grid Reduces Scatter and Improves Image Quality but Requires Higher Exposure
• B. Using a Grid Eliminates the Need for Proper Collimation
• C. A Grid Has No Effect on Patient Dose
• D. A Grid Compensates Automatically for Underpenetration

Answer: (C)

Using a grid in radiography primarily affects scatter, image contrast, and patient dose. A grid traps scattered photons that would otherwise reach the detector, so image contrast improves when a grid is used. However, the grid also absorbs some primary photons, requiring an increase in exposure to achieve the same receptor exposure, which raises the dose to the patient. So the true statement is that a grid reduces scatter and improves image quality but requires higher exposure, increasing patient dose. The idea that a grid eliminates the need for proper collimation isn’t correct—collimation and grids work together to limit beam and reduce dose while improving image quality. A grid also does have an effect on patient dose, so saying it has none isn’t accurate. Finally, grids don’t automatically compensate for underpenetration; if penetration is insufficient, technique adjustments (like increasing kVp or exposure) are needed.

Using a grid in radiography primarily affects scatter, image contrast, and patient dose. A grid traps scattered photons that would otherwise reach the detector, so image contrast improves when a grid is used. However, the grid also absorbs some primary photons, requiring an increase in exposure to achieve the same receptor exposure, which raises the dose to the patient. So the true statement is that a grid reduces scatter and improves image quality but requires higher exposure, increasing patient dose.

The idea that a grid eliminates the need for proper collimation isn’t correct—collimation and grids work together to limit beam and reduce dose while improving image quality. A grid also does have an effect on patient dose, so saying it has none isn’t accurate. Finally, grids don’t automatically compensate for underpenetration; if penetration is insufficient, technique adjustments (like increasing kVp or exposure) are needed.