To optimize the image, which adjustment was used to improve lateral resolution by increasing line density?

To optimize the image, which adjustment was used to improve lateral resolution by increasing line density?

• A. Increased dynamic range
• B. Decreased transducer frequency
• C. Reduced frame averaging
• D. Increased line density

Answer: (D)

To improve lateral resolution, increase line density. More scan lines across the image mean finer lateral sampling, so structures that are close side by side can be distinguished more clearly along the width of the image. This direct increase in lateral sampling reduces gaps and sharpens features perpendicular to the beam. Other common adjustments affect different aspects: increasing dynamic range broadens the gray-scale range but doesn’t add samples across the width; decreasing transducer frequency lowers overall resolution and penetration; reducing frame averaging speeds up display but can increase speckle and temporal noise. None of these directly enhance lateral sampling like increasing line density does.

To improve lateral resolution, increase line density. More scan lines across the image mean finer lateral sampling, so structures that are close side by side can be distinguished more clearly along the width of the image. This direct increase in lateral sampling reduces gaps and sharpens features perpendicular to the beam.

Other common adjustments affect different aspects: increasing dynamic range broadens the gray-scale range but doesn’t add samples across the width; decreasing transducer frequency lowers overall resolution and penetration; reducing frame averaging speeds up display but can increase speckle and temporal noise. None of these directly enhance lateral sampling like increasing line density does.