Which factor reduces unsharpness and improves recorded detail?

• A. Increases blur
• B. Decreases exposure
• C. Improves recorded detail
• D. Increases noise

Answer: (C)

Unsharpness is the blur that reduces edge definition on a radiograph, so the goal is to minimize that blur to improve the clarity of recorded detail. Techniques that reduce blur include keeping motion to a minimum, using an appropriate (often smaller) focal spot, and optimizing geometry with proper source-to-image distance and object-to-image distance, along with appropriate exposure to avoid under- or overexposure. Among the options, increasing blur would worsen image clarity, decreasing exposure can lead to poor density and increased noise without genuinely improving sharpness, and increasing noise degrades detail. The statement that recorded detail is improved best captures the result of reducing unsharpness, making it the correct choice.