Radiologists at the University of Washington in Seattle have described the calibration errors gradually introduced by "operator-influenced procedures," and how to correct for them.
Top news from a Jan. 30 featured radiology search on SearchMedica: image error
Quantifying and Reducing the Effect of Calibration Error on Variability of PET/CT Standardized Uptake Value MeasurementsThe Journal of Nuclear Medicine | Feb 1, 2011(Free abstract. Full text $15)
Radiologists at the University of Washington in Seattle kept track of calibration factors for 2 PET/CT scanners for up to 3.5 years, and watched the incremental calibration error that accumulated despite regular manufacturer-recommended QA. Their article describes the steps they recommend to compensate forcalibration errors gradually introduced by "operator-influenced procedures."
Philips unveils new CT and PET/CT platforms
Philips is adding to its portfolio a new line of CT scanners and a new line of PET/CTs based on dose-saving technologies.
Monitors need monitoring
The weakest link in the digital imaging chain is often the last: the display station itself. While standards such as the DICOM Gray Scale Display Function have emerged to calibrate monitor performance, this was not designed to address ambient lighting levels, maximum monitor luminance, luminance ratio, luminance uniformity, or spatial resolution.