Which system allows the recording of an entire scan line instantly?

Which system allows the recording of an entire scan line instantly?

• A. Pencil beam system
• B. Linear detector system
• C. Fan beam system
• D. Collimated detector system

Answer: (C)

The fan beam system is designed to capture an entire scan line at once by utilizing a series of detectors arranged in a linear configuration along an arc. This arrangement allows for a wider section of the target area to be imaged simultaneously compared to other systems. When the X-ray beam is emitted in a fan shape, the detectors can simultaneously measure the attenuation of the beam across the entire line of sight rather than having to traverse back and forth, as seen in systems like the pencil beam. This instantaneous recording capability enhances the speed and efficiency of the scan, resulting in quicker acquisition times and potentially improved patient comfort, as the exposure time is shortened. The architecture of the fan beam system allows for more comprehensive data collection in a single rotation of the scanning apparatus. In contrast, other systems, such as the pencil beam and linear detector systems, do not utilize this simultaneous capture method, requiring multiple passes to obtain data across the same area. The collimated detector system is similar, as it focuses on specific areas rather than recording an entire scan line instantly. This makes the fan beam system particularly advantageous in applications such as bone densitometry, where rapid and precise measurements are important.

The fan beam system is designed to capture an entire scan line at once by utilizing a series of detectors arranged in a linear configuration along an arc. This arrangement allows for a wider section of the target area to be imaged simultaneously compared to other systems. When the X-ray beam is emitted in a fan shape, the detectors can simultaneously measure the attenuation of the beam across the entire line of sight rather than having to traverse back and forth, as seen in systems like the pencil beam.

This instantaneous recording capability enhances the speed and efficiency of the scan, resulting in quicker acquisition times and potentially improved patient comfort, as the exposure time is shortened. The architecture of the fan beam system allows for more comprehensive data collection in a single rotation of the scanning apparatus.

In contrast, other systems, such as the pencil beam and linear detector systems, do not utilize this simultaneous capture method, requiring multiple passes to obtain data across the same area. The collimated detector system is similar, as it focuses on specific areas rather than recording an entire scan line instantly. This makes the fan beam system particularly advantageous in applications such as bone densitometry, where rapid and precise measurements are important.