FDG-PET/CT Technical Committee Quality Control Subcommittee Goals Bridge the gap between PET/CT scanner acceptance/qualification/certification and routine (daily) quality control Summarize methods and parameters for evaluating daily PET and CT QC on each vendors PET/CT scanner Long term goal: Establish common standards for
recording and distributing QC parameters for individual patient scans (e.g. extended DICOM tags) Process 1. Identify the daily quality control tests that are performed on each vendors PET/CT scanners 2. Specify the range of acceptable parameters for each test as recommended by the vendor 3. Describe the methods for obtaining QC parameters and the output format for each vendor
4. Ideally, develop standard for daily QC output that could be exported with individual patient scan, e.g. extended DICOM tags or standard file format (CSV, XML) CT Quality Control Siemens automated test (pass/fail) Check HU value of water. Check pixel noise Check tube voltages
GE manual test with acceptable range Check mean CT value of water (range: 0 3 HU) in 3 ROIs of uniform section. Check variance of water (range: 3 0.4) in 3 ROIs of uniform section Siemens PET Quality Control Ge-68 cylinder compared to normalization standard
Visually inspect sinograms and fansums. If a sinogram shows a dark or bright streak or a fansum block is not uniform, notify physicist If Chi-square > 2.5, notify physicist. (Original limit, adopted as DFCI threshold.) If Chi-square > 10, call Service. Notify physicist GE PET Quality Control
Ge-68 pin source compare daily tests to baseline with color coded results (green/yellow/red) Coincidence mean (sensitivity test: Average of coincidences for all crystals)
Coincidence variance Singles mean (Average of singles for all crystals). Singles variance Mean deadtime (Average deadtime of all blocks). Timing mean (Average timing adjustment of all crystals) Energy shift (Average difference in energy peak location) QC Output formats Mostly based on visual display Siemens has some files available in html format on local folder GE results can be printed as postscript
Resources Needed Information about Philips Daily QC from end users and vendor Additional clarifications from GE and Siemens Feedback from RSNA QIBA members Potential interactions with DICOM working group to discuss inclusion of QC results
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Special thanks to Sheila McIlraith, Craig Schlenoff, Daniel Elenius and Naveen Srinivasan for providing slides and suggestions on this tutorial. Slide design by Roberta Hart-Hilber, DERI Austria Acknowledgements The development of OWL-S has been funded almost exclusively by the DAML...
may overlap with chronic fatigue syndrome (but pain is more prominent in patients with FM than in chronic fatigue syndrome) non-restorative sleep. impaired daytime function due to sleep latency, sleep disturbance, and fragmented sleep ... Victoria 40. Pain everywhere worsening...
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Many of these "traditions" affect the heart of the Gospel and the Great Commission of the Church. (Mt 28:18,19) (Salvation, Baptism, Discipleship) For example, every one of the 89 references in God's Word to Baptism use the word "
Jaworski, B. & Potari, D. (2009) Bridging the micro- and the macro- divide: using an activity theory model to capture sociocultural complexity in mathematics teaching and its development. Educational Studies in Mathematics
GA Resolution 61/279 (2007) to design, recruit, develop and retain a high-quality civilian workforce for UN peace operations. ... useful tools and comprehensive HR training and development. ... *Deployment dates of job networks following POLNET to be determined. Overview -...
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