Table of Contents
Calibration is essential for accurate PET imaging. Errors in calibration can lead to incorrect diagnoses and treatment planning. Understanding common calibration mistakes and their corrections helps ensure reliable results.
Common Calibration Errors
Several calibration errors frequently occur in PET imaging. These include energy calibration errors, timing calibration issues, and detector sensitivity inaccuracies. Each can affect image quality and quantitative measurements.
Energy Calibration Errors
Energy calibration errors happen when the system incorrectly measures the energy of detected photons. This can cause false positives or missed detections. Regular calibration with known energy sources helps prevent this issue.
Timing Calibration Issues
Timing calibration ensures accurate coincidence detection. Errors can lead to image blurring or artifacts. Correcting timing involves adjusting the system to synchronize detector signals properly.
Detector Sensitivity Inaccuracies
Detector sensitivity varies over time, affecting image uniformity. Routine calibration with uniform phantoms helps identify and correct sensitivity discrepancies, maintaining image consistency.
- Perform regular calibration with standard sources.
- Use uniform phantoms to check detector sensitivity.
- Update calibration settings after maintenance.
- Monitor system performance continuously.