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Implementation of Dose Monitoring Software in the Clinical Routine: First Experiences
C Heilmaier1, N Zuber1, B Bruijns1
1Department of Radiology and Nuclear Medicine, Stadtspital Triemli, Zurich, Switzerland.
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|October 1, 2015
Summary
Dose monitoring software successfully implemented in computed tomography (CT) scans, revealing patient-specific factors and human error contribute to radiation dose alerts. This tool is vital for enhancing patient radiation protection.
Area of Science:
- Medical Imaging
- Radiology
- Radiation Protection
Background:
- Medical imaging, particularly computed tomography (CT), has seen increased public radiation exposure.
- Effective tools are needed to register and control patient radiation doses.
Purpose of the Study:
- To implement and evaluate dose monitoring software for computed tomography (CT) scanners.
- To analyze patient dose exposure and identify factors contributing to elevated radiation levels.
Main Methods:
- Retrospective analysis of CT dose data from July 2014 to February 2015.
- Evaluation of scans exceeding predefined dose thresholds (alerts).
- Comparison of alert data between an emergency CT scanner and a clinical routine CT scanner using chi-square tests.
Main Results:
- A total of 8883 scans were analyzed, with a 4% alert quota.
- Higher alert rates were observed for the clinical routine CT scanner compared to the emergency CT scanner.
- Key reasons for alerts included high BMI (51%), patient off-centering (24%), and scan repetition (11%).
- A significant correlation was found between high body weight and elevated radiation dose (r=0.585).
Conclusions:
- Successful implementation of dose monitoring software in clinical routine CT examinations.
- Dose notifications are primarily attributed to patient-specific factors (e.g., high BMI, orthopedic hardware) and human error (e.g., off-centering, scan repetition).
- Dose monitoring software provides crucial data for improving patient radiation protection strategies.
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