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."
Related content from Diagnostic Imaging:
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.
Study Reaffirms Low Risk for csPCa with Biopsy Omission After Negative Prostate MRI
December 19th 2024In a new study involving nearly 600 biopsy-naïve men, researchers found that only 4 percent of those with negative prostate MRI had clinically significant prostate cancer after three years of active monitoring.
Study Examines Impact of Deep Learning on Fast MRI Protocols for Knee Pain
December 17th 2024Ten-minute and five-minute knee MRI exams with compressed sequences facilitated by deep learning offered nearly equivalent sensitivity and specificity as an 18-minute conventional MRI knee exam, according to research presented recently at the RSNA conference.
Can Radiomics Bolster Low-Dose CT Prognostic Assessment for High-Risk Lung Adenocarcinoma?
December 16th 2024A CT-based radiomic model offered over 10 percent higher specificity and positive predictive value for high-risk lung adenocarcinoma in comparison to a radiographic model, according to external validation testing in a recent study.