In digital radiography, the technique should be adjusted to use the minimum patient dose necessary to achieve the required image quality.

• A. The technique should be adjusted to maximize image quality regardless of dose.
• B. The technique should be adjusted to use the minimum patient dose necessary to achieve the required image quality.
• C. Dose does not affect image quality.
• D. One fixed dose fits all examination types.

Answer: (B)

In digital radiography, you aim to use the minimum patient dose necessary to obtain a diagnostic image. This follows the principle of ALARA, balancing safety with image quality. Digital systems can compensate for a wide range of exposures, but too little dose leads to quantum noise that degrades detail and diagnostic usefulness, while unnecessary extra dose increases patient risk without giving meaningful image improvements. So the technique should be adjusted to provide just enough photons to achieve the required image quality for diagnosis, taking into account patient size, area being imaged, and equipment capabilities.

This means selecting appropriate exposure factors and using proper technique—enough penetration to visualize anatomy clearly, but not more than needed; employing good positioning, collimation, and shielding; and using exposure indicators to verify that the dose remains within an acceptable range for future exams.

The other ideas don’t fit well: maximizing image quality at any dose ignores safety; saying dose doesn’t affect image quality is incorrect because insufficient dose leads to poor image detail; and using one fixed dose for all examinations ignores patient variation and technique needs.