What kind of pattern does the pencil beam scanner follow in its operation?

• A. Circular pattern
• B. Rectilinear pattern
• C. Random pattern
• D. Elliptical pattern

Answer: (B)

A pencil beam scanner operates using a precise rectilinear pattern, which means it moves in straight lines to capture bone density data. This method allows for focused measurements in a narrow beam, providing detailed information about specific areas of interest in the bone structure. The rectilinear movement enhances the accuracy and repeatability of the measurements, making it particularly effective for assessing bone mineral density.

In contrast, other patterns such as circular or elliptical would imply a different approach, potentially leading to less precise local measurements by not concentrating effectively on the area of interest. A random pattern would be counterproductive in the context of bone densitometry, as it would not provide consistent or reliable data. The rectilinear pattern used by pencil beam scanners signifies the importance of accuracy in diagnostics and treatment planning in the field of bone health.