Which development occurred most recently?

Which development occurred most recently?

• A. The first dedicated bone densitometry unit
• B. The first commercial DXA scanner
• C. Portable peripheral DXA units for peripheral scans
• D. The introduction of bone densitometry in routine screening programs

Answer: (C)

The main idea here is how bone densitometry technology progressed over time from fixed, specialized devices to portable, bedside options. Early on, measurements were done with a dedicated bone densitometry unit focused on densitometry tasks. This established the method and validated its use. Next came the first commercial DXA scanners, which made the technology widely available in clinics and hospitals. After that, some health systems introduced bone densitometry into routine screening programs for at-risk populations, using the central devices that were already established. Only later did portable peripheral DXA units for scanning peripheral sites (like the wrist or heel) become available, expanding access to density testing outside traditional central-scanner settings. Because portable peripheral units were developed after the others, they represent the most recent development among the options.

The main idea here is how bone densitometry technology progressed over time from fixed, specialized devices to portable, bedside options. Early on, measurements were done with a dedicated bone densitometry unit focused on densitometry tasks. This established the method and validated its use. Next came the first commercial DXA scanners, which made the technology widely available in clinics and hospitals. After that, some health systems introduced bone densitometry into routine screening programs for at-risk populations, using the central devices that were already established. Only later did portable peripheral DXA units for scanning peripheral sites (like the wrist or heel) become available, expanding access to density testing outside traditional central-scanner settings. Because portable peripheral units were developed after the others, they represent the most recent development among the options.