An audit of a hospital-based Doppler ultrasound quality control protocol using a commercial string Doppler phantom |
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| Institution: | 1. Medical Physics and Bioengineering Department, St James''s Hospital, Dublin, Ireland;2. Centre for Advanced Medical Imaging (CAMI), St James''s Hospital/Trinity College Dublin, Ireland;3. IEO, School of Physics and FOCAS, Dublin Institute of Technology, Dublin, Ireland;1. CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France;2. Kobe City College of Technology, Nishiku, Kobe, Japan;3. Service de Chirurgie Plastique et Reconstructive, Hôpital Henri Mondor AP-HP, F-94000, Créteil, France;4. CNRS, B2 OA (CNRS UMR 7052), Paris, France;1. Department of Urology, Sector Furore, Erasmus Medical Centre, Rotterdam, The Netherlands;2. Department of Radiology, Medical Ultrasound Imaging Center, Radboud University Medical Centre, Nijmegen, The Netherlands;1. Department of Urology, Sector Furore, Erasmus Medical Centre, Rotterdam, The Netherlands;2. Medical UltraSound Imaging Center (MUSIC), Department of Radiology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands;1. BF SYSTEMES, Technopôle de la Mer, 229, chemin de la Farlède, 83500, La Seyne-Sur-Mer, France;2. Laboratoire de Mécanique et d’Acoustique, CNRS UPR7051, 31, chemin Joseph Aiguier, 13402 Marseille, France;1. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany;2. Department of Neuroradiology, University Hospital Gießen, Gießen, Germany;3. Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, University Hospital Essen, Essen, Germany;4. Department of Neurosurgery, University Hospital Essen, Essen, Germany;5. Neuroradiology, Clinic Hirslanden, Zurich, Switzerland;1. Emergency Medicine Resident, PGY-1, Medical College of Wisconsin, Milwaukee, Wisconsin;2. Division of Anatomy, The Ohio State University, Columbus, Ohio;3. Department of Emergency Medicine, The Ohio State University Medical Center, Columbus, Ohio |
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| Abstract: | Results from a four-year audit of a Doppler quality assurance (QA) program using a commercially available Doppler string phantom are presented. The suitability of the phantom was firstly determined and modifications were made to improve the reliability and quality of the measurements. QA of Doppler ultrasound equipment is very important as data obtained from these systems is used in patient management. It was found that if the braided-silk filament of the Doppler phantom was exchanged with an O-ring rubber filament and the velocity range below 50 cm/s was avoided for Doppler quality control (QC) measurements, then the maximum velocity accuracy (MVA) error and intrinsic spectral broadening (ISB) results obtained using this device had a repeatability of 18 ± 3.3% and 19 ± 3.5%, respectively. A consistent overestimation of the MVA of between 12% and 56% was found for each of the tested ultrasound systems. Of more concern was the variation of the overestimation within each respective transducer category: MVA errors of the linear, curvilinear and phased array probes were in the range 12.3–20.8%, 32.3–53.8% and 27–40.7%, respectively. There is a dearth of QA data for Doppler ultrasound; it would be beneficial if a multicentre longitudinal study was carried out using the same Doppler ultrasound test object to evaluate sensitivity to deterioration in performance measurements. |
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| Keywords: | Ultrasound Doppler Quality assurance String phantom |
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