scholarly journals Automatic online quality control of synthetic CTs

2020 ◽  
Author(s):  
Louis D. van Harten ◽  
Jelmer M. Wolterink ◽  
Joost J. C. Verhoeff ◽  
Ivana Išgum
Keyword(s):  
Quality Control ◽  
Online Quality Control

Online quality control of laser welding using supporting line-shaped IR detection

1999 ◽  
Author(s):  
Hans K. Toenshoff ◽  
Ferdinand von Alvensleben ◽  
Andreas Ostendorf ◽  
Oliver Hillers ◽  
Matthias Stallmach
Keyword(s):  
Quality Control ◽  
Laser Welding ◽  
Supporting Line ◽  
Online Quality Control ◽  
Ir Detection

scholarly journals Absolute optical chiral analysis using cavity-enhanced polarimetry

2021 ◽  
Author(s):  
Lykourgos Bougas ◽  
joseph byron ◽  
Dmitry Budker ◽  
Jonathan Williams
Keyword(s):  
Quality Control ◽  
Enantiomeric Excess ◽  
Chiral Analysis ◽  
In Situ Observation ◽  
Complex Environments ◽  
Gaseous Mixtures ◽  
Counterfeit Goods ◽  
Chiral Compounds ◽  
Online Quality Control ◽  
Pharmaceutical Industries

Chiral analysis is central for scientific advancement in the fields of chemistry, biology, and medicine. It is also indispensable in the development and quality control of chiral compounds in the chemical and pharmaceutical industries. Current methods for chiral analysis, namely optical polarimetry, mass spectrometry and nuclear magnetic resonance, are either insensitive, have low time resolution, or require preparation steps, and so are unsuited for monitoring chiral dynamics within complex environments: the current need of both research and industry. Here we present the concept of absolute optical chiral analysis, as enabled by cavity-enhanced polarimetry, which allows for accurate unambiguous enantiomeric characterization and enantiomeric-excess determination of chiral compounds within complex mixtures at trace levels, without the need for calibration, even in the gas phase. The utility of this approach is demonstrated by post chromatographic analysis of complex gaseous mixtures, the rapid quality control of perfume mixtures containing chiral volatile compounds, and the online in-situ observation of chiral volatile emissions from a plant under stress. Our approach and technology offer a step change in chiral compound determination, enabling online quality control of complex chemical mixtures, identification of counterfeit goods, detection of pests on plants, and assessment of chiral emission processes from climate relevant ecosystems.

Online Quality Control, Hyperfractionated Radiotherapy Alone and Reduced Boost Volume for Standard Risk Medulloblastoma: Long-Term Results of MSFOP 98

2009 ◽  
Vol 27 (11) ◽  
pp. 1879-1883 ◽  
Author(s):  
Christian Carrie ◽  
Jacques Grill ◽  
Dominique Figarella-Branger ◽  
Valerie Bernier ◽  
Laetitia Padovani ◽  
...  
Keyword(s):  
Overall Survival ◽  
Quality Control ◽  
Full Scale ◽  
Cognitive Outcomes ◽  
Long Term Results ◽  
Hyperfractionated Radiotherapy ◽  
Tumor Bed ◽  
Online Quality Control ◽  
Standard Risk

Purpose To determine event free and overall survival, and long-term cognitive sequelae of children with standard-risk medulloblastoma (SRM) treated with hyperfractionated radiotherapy, conformal reduced boost volume without chemotherapy, and online quality assurance. Patients and Methods Forty-eight patients (age 5 to 18 years) were included in the Medulloblastoma-Société Française d'Oncologie Pédiatrique (MSFOP 98) protocol (December 1998 to October 2001). Patients received hyperfractionated radiotherapy (HFRT; 36 Gy, 1 Gy/fraction twice per day) to the craniospinal axis followed by a boost to the tumor bed (1.5-cm margin) to a dose of 68 Gy. Records of craniospinal irradiation were reviewed before treatment started. Neuropsychologic evaluations were done according to the protocol (1, 3, 5, and 7 years after irradiation). Cognitive outcomes were followed longitudinally with full-scale intelligence quotient (FSIQ) obtained with age-adapted Wechsler scales. Results After a median follow-up of 77.7 months, 6-year overall survival (OS) and event-free survival (EFS) rates for the cohort were 78% (95% CI, 66% to 90%) and 75%, respectively (95% CI, 62% to 87%). Thanks to quality control, 14 major deviations were detected. Annual full scale IQ decline was 2 points over a 6-year period. Predicted change in FSIQ points per year was 2.15 (95% CI, −1.24 to 3.51) with an intercept (ie, predicted FSIQ) of 93.57 at baseline. Conclusion HFRT protocol with conformal reduced boost and online quality control allows excellent long-term OS and EFS in the absence of chemotherapy. In addition, FSIQ drops seem to be less pronounced than previously reported with standard irradiation regimens.

Stability and accuracy of power and phase measurements of a VVM system designed for online quality control of the BSD-2000 (-3D) DHT system

2003 ◽  
Vol 19 (1) ◽  
pp. 74-88 ◽  
Author(s):  
W. M. Lee ◽  
A. Ameziane ◽  
A. M. C. van den Biggelaar ◽  
P. J. M. Rietveld ◽  
G. C. van Rhoon
Keyword(s):  
Quality Control ◽  
Phase Measurements ◽  
Online Quality Control ◽  
Stability And Accuracy
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