The center of rotation (COR) offset correction should be performed how often on SPECT cameras?

The center of rotation (COR) offset correction on SPECT cameras is important for ensuring the accuracy of images and the overall performance of the camera system. Performing this correction weekly is recommended because it helps to maintain precise alignment of the imaging system, compensating for any mechanical or calibration drifts that could occur over time. Regular weekly checks can identify and rectify these issues before they lead to significant image degradation, allowing for consistent and reproducible results in nuclear medicine imaging.

Longer intervals for the COR offset correction, such as monthly or yearly, could result in more pronounced errors in the alignment and quality of the images; thus, they are not sufficient to ensure optimal performance. Daily checks may be excessive for most clinical settings, as the stability of modern SPECT systems typically does not require such frequent adjustments under normal operating conditions. Regularly scheduled weekly checks strike a balance between maintaining image quality and operational efficiency.