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ASSESSING THE USEFULNESS OF THE QUASI-IDEAL OBSERVER FORQUALITY CONTROL IN FLUOROSCOPY
Linköping University, Department of Medical and Health Sciences, Radiation Physics. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV).ORCID iD: 0000-0002-8387-0583
Linköping University, Department of Medical and Health Sciences, Radiation Physics. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV).ORCID iD: 0000-0003-3352-8330
2015 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 169, no 1-4, 360-364 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to evaluate the reliability of the square of the signal-to-noise ratio rate, SNR2rate, as a precise measurement for quality control test in a digital fluoroscopy system. The quasi-ideal model observer was used to measure SNR2rate. The dose rate, pulse rate and field of view were varied, and their effect on dose efficiency, defined as SNR2rate=PKA;rate, was evaluated (where PKA;rate is the air kerma-area product rate). Measurements were repeated to assess reproducibility. The relative standard deviation in SNR2rate=PKA;rate over seven consecutive measurements was 5 %. No significant variation in SNR2rate=PKA;rate was observed across different pulse rates (10–30 pulses s-1). The low-dose-rate setting had a superior dose efficiency compared with the medium- and high-dose-rate settings. A smaller field of view resulted in higher dose efficiency. The results show that SNR2rate=PKA;rate measurements offer the high precision required in quality control constancy tests.

Place, publisher, year, edition, pages
2015. Vol. 169, no 1-4, 360-364 p.
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:liu:diva-123020DOI: 10.1093/rpd/ncv434PubMedID: 26493947OAI: oai:DiVA.org:liu-123020DiVA: diva2:875843
Available from: 2015-12-02 Created: 2015-12-02 Last updated: 2016-07-15

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The full text will be freely available from 2016-10-21 10:06
Available from 2016-10-21 10:06

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Tesselaar, ErikSandborg, Michael
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Radiation PhysicsFaculty of Medicine and Health SciencesCenter for Medical Image Science and Visualization (CMIV)
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