Protection Requirements for Using Mobile DR

1. Overview and Basic Principles

Mobile DR (portable/mobile digital radiography) is widely used in wards, emergency rooms, and intensive care units due to its flexibility. However, because examinations are performed outside a standard X-ray room, special attention must be paid to radiation protection and infection control.
The core principle is ALARA (As Low As Reasonably Achievable)—achieving diagnostic-quality images while minimizing radiation exposure to patients and healthcare workers.pub.iaea.org

2. Regulations and Responsibilities

1. Hospitals must comply with local radiation protection and medical exposure regulations and establish standard operating procedures (SOPs) for mobile radiography.GOV.UK
2. The Radiology Department or Radiation Safety Officer should approve the usage areas for mobile DR and perform safety assessments. Radiographers are responsible for on-site protection, including positioning, dose optimization, and safety checks.ijmedrev.com+1

3. Site Safety and Controlled Area Setup

1. When operating mobile DR in open wards or corridors, temporary controlled or supervised areas must be identified. In general, a safe distance (often around 2 meters or more) should be maintained in the direction of the central beam to keep scatter radiation to acceptable levels.aapm.org+1
2. If bystanders cannot leave the controlled area, additional shielding (e.g., mobile lead screens) must be used, or the exam should be delayed until safety is ensured.

4. Personal Protection for Healthcare Workers

1. Distance First: During exposure, the operator should stand as far away as possible from the patient and the direction of the primary beam. Distance reduction is more effective than lead protection.aapm.org+1
2. Lead Protection When Necessary: If close contact is unavoidable, the operator should wear a lead apron, thyroid shield, and lead gloves if needed. All protective gear must be regularly inspected and disinfected.aapm.org+1
3. Safe Positioning: The operator should ideally stand at a 90° angle to the central beam to minimize scatter exposure.elearning.isrrt.org

5. Patient Protection and Image Quality Optimization

1. Proper Collimation: Limit the exposure field strictly to the area of clinical interest to reduce scatter and unnecessary radiation.Gravitas
2. Optimizing Exposure Parameters: Adjust kV, mA, and exposure time based on patient size and anatomy (following manufacturer guidelines and automatic exposure control such as IBS/ABC).
3. Patient Shielding: Routine use of gonadal or contact shielding is generally not recommended unless specifically indicated after professional assessment.

6. Equipment and Technical Requirements

Regular Testing and Calibration: Mobile DR units must undergo periodic performance testing, including dose output, exposure reproducibility, leakage radiation checks, and calibration of dose indicators.

1. Use of Remote Exposure: Whenever possible, use a remote exposure switch so the operator can stand in a safe position. If remote control is not available, ensure no body part enters the beam path during exposure.aapm.org
2. Portable Lead Screens: Use mobile lead shields when other personnel cannot leave the area.

7. Infection Control (Special Consideration for Mobile DR)

1. Since mobile DR is frequently used in isolation wards or high-risk environments, infection control measures (PPE, equipment surface disinfection, single-use covers) must be strictly followed alongside radiation protection.PLOS+1
2. Lead protective equipment must have clear cleaning procedures to prevent cross-infection.

8. Personnel Dose Monitoring and Records

1. Staff performing mobile radiography regularly should wear personal dosimeters and undergo periodic dose evaluations. Any excessive readings must be investigated.
2. Each mobile DR exam should record patient data, examination site, exposure parameters, operator information, and location for quality tracking.aapm.org

9. Training and Standard Operating Procedures (SOP)

1. Radiographers and relevant nursing staff should receive regular training covering radiation basics, safe positioning, device operation, emergency procedures, and infection control.aapm.org
2. Suggested quick checklist for mobile DR operations:
   • Confirm clinical indication and patient consent
   • Assess the area and clear unnecessary personnel
   • Use proper collimation and minimal exposure field
   • Operator stands at a safe distance and optimal angle
   • Use lead screens or personal protection when required
   • Disinfect equipment after the exam and ensure proper documentation Gravitas+1

10. Summary

Safe use of mobile DR is a comprehensive process involving site assessment, distance and shielding management, optimized exposure parameters, proper documentation, and ongoing training.
Following the ALARA principle and establishing clear SOPs based on local regulations and hospital conditions are essential to ensure the safety of both patients and healthcare staff.