Set-up of quality assurance procedures for a 3T-MRI facility starting with the AAPM report no.100

2014 ◽  
Vol 30 ◽  
pp. e128
Author(s):  
F. Dubus
Keyword(s):  
Quality Assurance ◽  
3T Mri ◽  
Set Up

Operational storm surge forecasting in the Netherlands: developments in the last decade

2005 ◽  
Vol 363 (1831) ◽  
pp. 1441-1453 ◽  
Author(s):  
Martin Verlaan ◽  
Annette Zijderveld ◽  
Hans de Vries ◽  
Jan Kroos
Keyword(s):  
Quality Assurance ◽  
The Netherlands ◽  
Kalman Filtering ◽  
Model Calibration ◽  
Storm Surges ◽  
Operational Environment ◽  
Hydrodynamic Models ◽  
Future Developments ◽  
Set Up ◽  
Storm Surge Forecasting

The accurate forecasting of storm surges is an important issue in the Netherlands. With the emergence of the first numerical hydrodynamic models for surge forecasting at the beginning of the 1980s, new demands and possibilities were raised. This article describes the main phases of the development and the present operational set-up of the Dutch continental shelf model, which is the main hydrodynamic model for storm surges in the Netherlands. It includes a brief discussion of applied data-assimilation techniques, such as Kalman filtering, the model calibration process and some thoughts on quality assurance in an operational environment. After further describing some select recent investigations, the paper concludes with some remarks on future developments in a European context.

scholarly journals Implementation of a quality approach in Human Resources Management within the Moroccan university

2016 ◽  
Vol 6 (7) ◽  
Author(s):  
Rachid ELKACHRADI
Keyword(s):  
Quality Assurance ◽  
Human Resources ◽  
Human Resources Management ◽  
Resources Management ◽  
Higher Education System ◽  
Effectiveness And Efficiency ◽  
Set Up ◽  
Hr Function ◽  
The University ◽  
Quality Approach

The university reform in Morocco introduced principles of quality assurance into the Higher Education System. In this regard, the law 01-00 has set up a device which is mainly articulated around the establishment of a system of accreditation of training and the establishment of a global system of evaluation in the whole system. However, Human Resources Management, the keystone of any change project, is not put at the center of the operationalization of reform projects. In our research, we will look at the factors that impede the operationalization of the principles of quality assurance to improve the effectiveness and efficiency of the HR function. Based on the results obtained within the framework of this exploratory study, we let's propose the key determinants for the implementation of a quality approach in Human Resources Management within Moroccan universities.

Wastewater QC workflow in GalaxyTrakr (SSQuAWK) v2

2022 ◽  
Author(s):  
Jasmine Amirzadegan ◽  
tunc.kayikcioglu not provided ◽  
hugh.rand not provided ◽  
Ruth E Timme ◽  
Maria Balkey
Keyword(s):  
Quality Assurance ◽  
Illumina Miseq ◽  
Video Tutorial ◽  
Basic Protocol ◽  
Wastewater Samples ◽  
Set Up ◽  
Quality Assessments ◽  
Sequence Quality

PURPOSE: Step-by-step instructions for checking sequence quality for SARS-CoV-2 wastewater samples using SSQuAWK: SARS - CoV - 2 Sequence Quality Assurance Workflow and Kontraption. The SSQuAWK workflow, implemented in a custom Galaxy instance, will produce quality assessments for raw reads (Illumina MiSeq paired-end fastq files). SCOPE: This protocol covers the following tasks: 1. Set up an account in GalaxyTrakr 2. Create a new history 3. Upload data 4. Execute the SSQuAWK workflow 5. Interpret the results Version history: V1: Basic protocol steps with screenshots V2: Addition of a detailed 12 minute video tutorial

An intelligent fixture with a dynamic clamping scheme

2000 ◽  
Vol 214 (3) ◽  
pp. 183-196 ◽  
Author(s):  
A Y C Nee ◽  
A Senthil Kumar ◽  
Z J Tao
Keyword(s):  
Quality Assurance ◽  
Control Strategy ◽  
Sensory Feedback ◽  
Design Procedure ◽  
Integrated Approach ◽  
Fixture Design ◽  
On Line ◽  
Thin Walled ◽  
Set Up ◽  
Dynamic Clamps

Both proper fixture design and optimum fixturing execution are crucial to workpiece quality assurance in manufacturing. This paper deals with an integrated approach to fixturing problems and, in particular, a ‘live’ fixture with sensory feedback and on-line fixturing control strategy to perform an optimal fixturing operation. The framework of an integrated fixture design procedure is first presented. The functions and structure of an intelligent fixture are proposed. The prototype intelligent fixture with dynamic clamps capable of delivering accurate but varying clamping intensity is developed. This novel set-up has been proven to be effective for workpiece quality improvement and productivity enhancement through machining experiments on thin-walled workpieces.

scholarly journals Clinical implementation and initial experience with a 1.5 Tesla MR-linac for MR-guided radiotherapy for gynecologic cancer: An R-IDEAL stage 1/2a first in humans/feasibility study of new technology implementation

2021 ◽  
Author(s):  
David S Lakomy ◽  
Jinzhong Yang ◽  
Sastry Vedam ◽  
Jihong Wang ◽  
Belinda Lee ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Technology Implementation ◽  
New Technology ◽  
Gynecologic Cancer ◽  
Dose Calculations ◽  
Gynecologic Malignancies ◽  
Clinical Implementation ◽  
Set Up ◽  
Stage 1 ◽  
Accumulated Dose

Purpose: Magnetic resonance imaging-guided linear accelerator systems (MR-linacs) can facilitate the daily adaptation of radiotherapy plans. Here, we report our early clinical experience using an MR-linac for adaptive radiotherapy of gynecologic malignancies. Methods and Materials: Treatments were planned with an Elekta Monaco v5.4.01 and delivered by a 1.5 Tesla Elekta Unity MR-linac. The system offers a choice of daily adaptation based on either position (ATP) or shape (ATS) of the tumor and surrounding normal structures. The ATS approach has the option of manually editing the contours of tumors and surrounding normal structures before the plan is adapted. Here we documented the duration of each treatment fraction; set-up variability (assessed by isocenter shifts in each plan) between fractions; and, for quality assurance, calculated the percentage of plans meeting the ;γ-criterion of 3%/3-mm distance to agreement. Deformable accumulated dose calculations were used to compare ATP plans with reference dose plans. Results: Of the 10 patients treated with 90 fractions on the MR-linac, most received boost doses to recurrence in nodes or isolated tumors. Each treatment fraction lasted a median 32 minutes; fractions were shorter with ATP than with ATS (30 min vs 42 min, P<0.0001). The γ-criterion for all fraction plans exceeded >90% (median 99.9%, range 92.4%-100%), i.e., all plans passed quality assurance testing. The average extent of isocenter shift was <0.5 cm in each axis. The accumulated dose to the gross tumor volume was within 10% of the reference plan for all ATP cases. Accumulated doses for lesions in the pelvic periphery were within 1% of the reference plan as opposed to -5.8% to -9.6% for central tumors. Conclusions: The MR-linac is a reliable and clinically feasible tool for treating patients with gynecologic cancer.

Multicenter trial for the set-up of a MRI quality assurance programme

2004 ◽  
Vol 22 (1) ◽  
pp. 93-101 ◽  
Author(s):  
P. Colombo ◽  
A. Baldassarri ◽  
M. Del Corona ◽  
L. Mascaro ◽  
S. Strocchi
Keyword(s):  
Quality Assurance ◽  
Multicenter Trial ◽  
Quality Assurance Programme ◽  
Set Up

scholarly journals Optical method for verification of homogeneity of phantoms for calibration of magnetic resonance

2018 ◽  
Vol 10 (3) ◽  
pp. 82
Author(s):  
Anna Magdalena Sękowska ◽  
Aleksandra Kamińska ◽  
Agnieszka Sabisz
Keyword(s):  
Optical Coherence Tomography ◽  
Quality Assurance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Tomography ◽  
Spin Lattice Relaxation ◽  
Optical Coherence ◽  
Optic Express ◽  
Time Calibration ◽  
Resonance Sensor ◽  
Set Up

The primary purpose of this study was to develop a laboratory photonic set-up for characterisation of homogeneity of gel phantoms for calibration of a magnetic resonance. In this system optical coherence tomography allows the detection of micro- and macroscopic heterogeneities of a structure. The set-up was used to perform measurements of agar and agar-carrageenan gels, which are the basis for more complex phantoms for magnetic resonance calibration. Obtained results were compared with magnetic resonance tomography methods used to detect macroscopic spatial differences in composition and heterogeneities in phantoms. Full Text: PDF ReferencesPrice R. R. et al., Quality assurance methods and phantoms for magnetic resonance imaging: report of AAPM nuclear magnetic resonance Task Group No. 1., Med Phys. 1990 Mar-Apr;17(2):287-95. CrossRef Tofts P.S., QA: quality assurance, accuracy, precision and phantoms. Chapter 3 in Tofts P.S. (ed.) Quantitative MRI of the brain: measuring changes caused by disease. Chichester: John Wiley, 55-81. ISBN: 0-470-84721-2 CrossRef Wróbel M., Popov A., Bykov A., Tuchin V.V., Jędrzejewska-Szczerska M., Nanoparticle-free tissue-mimicking phantoms with intrinsic scattering, Biomedical Optic Express, vol. 7(6), 2088-2094 (2016). CrossRef Feder I., Wróbel M., Duadi H., Jędrzejewska-Szczerska M., Fixler D., Experimental results of full scattering profile from finger tissue-like phantom, Biomedical Optic Express, vol. 7 (11), 4695-4701 (2016). CrossRef Wróbel M. S. et al., Use of optical skin phantoms for pre-clinical evaluation of laser efficiency for skin lesion therapy, Journal of Biomedical Optics, 20(8), 20(8):085003 (2015). CrossRef Wróbel M .S. et al., Multi-layered tissue head phantoms for noninvasive optical diagnostics, Journal of Innovative Optical Health Sciences, 8(3), 1541005-1÷1541005-10 (2015). CrossRef Hellerbach A, Schuster V, Jansen A, Sommer J., MRI Phantoms - Are There Alternatives to Agar?, Plos One, 2013;8(8), ARTN e70343. CrossRef Almazrouei N. K., Newton M. I., Dye E. R., Morris R. H., Novel food-safe spin-lattice relaxation time calibration samples for use in magnetic resonance sensor development, Proceedings 2018, 2, 122. CrossRef Ohno S. et al., Production of a Human-Tissue-Equivalent MRI Phantom: Optimization of Material Heating, Magn Reson Med Sci. 2008;7(3):131-40. CrossRef Choma M. A., SarunicM. V., Yang C., Izatt J. A., Sensitivity advantage of swept source and Fourier domain optical coherence tomography, Opt. Express 11, 2183-2189 (2003). CrossRef Strąkowski M. R., Głowacki M., Kamińska A., Sawczak M., Gold nanoparticles evaluation using functional optical coherence tomography, Proc. SPIE 10053, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI, 1005336 (17 February 2017). CrossRef

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