In what manner does the pencil beam scanner move?

• A. In a circular pattern
• B. In tandem with a rectilinear pattern
• C. In a diagonal pattern
• D. In a random pattern

Answer: (B)

The motion of a pencil beam scanner is best described as moving in tandem with a rectilinear pattern. Pencil beam technology uses a narrow beam of radiation that is directed towards the bone being examined. This beam passes through the area in a straight line, collecting data as it moves back and forth across the target region.

This rectilinear movement allows for accurate and precise measurements, as it ensures that each part of the area is scanned methodically. The tandem aspect refers to the coordinated motion of the scanner along a linear path while simultaneously collecting data, effectively creating a detailed assessment of bone density.

Understanding this movement is crucial in bone densitometry, as it directly impacts the quality and reliability of the diagnostic results obtained from the scanner.