Chapter 6 Adapting Positions to Digital Equipment

Chapter 6 Adapting Positions to Digital Equipment

1. Introduction

   • Computed radiography units allow portability and flexibility of older film/screen systems
     • Can be used tabletop or in gridded Bucky tray
   • Digital radiography use a cordless DR detector that can also be removed from the Bucky and used table top
     • These detectors are often more awkward and cumbersome to use than CR cassettes
       • Detectors are extremely expensive and can not be dropped
   • Modern DR and CR systems are usually very capable of correcting for the effects of moderate scatter radiation during exposure for the use of high kVp levels
     • When removing the grid, reduce the technique to 1/3 of the usual grid technique for any particular anatomy

2. Portable DR Detectors

   • Portable DR detectors come in many styles, some have power cords attached while newer versions are cord free
     • DR detectors with cords are more difficult and bulky to use than film cassettes
     • Cordless eliminate the added weight and are safer to handle
       • Safest way to place a detector is to make sure the handle is on top and let the detector slide straight down
   • Most "upright Bucky" detectors developed for DR units can be rotated down into a horizontal position
     • This allows for more positions that are achievable for patients in wheelchairs
     • Trauma patients on backboards can be slid onto the DR detector without significant movement
       • Never leave a patient unattended with backboard still slid over the detector

3. Compensating Filters

   • Even digitally there are still procedures that are difficult to achieve proper contrast and good density
     • Ferlic filter can help specifically with the swimmers and lateral hip view
       • This filter helps to compensate the thickest and thinnest parts of anatomy