Accuracy evaluation of a non-invasive measuring instrument for diagnostic X-ray equipment

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  • Saitoh Hiroki
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University:Department of Radiology, Toyo public health college
  • Abe Shinji
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Ogura Izumi
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Katoh Yoh
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
  • Negishi Toru
    Graduate School of Radiological Technology, Gunma Prefectural College of Health Sciences

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Other Title
  • 診断用X線装置における非接続形測定器の精度評価

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Abstract

The aim of this research is to assess the accuracy of the non-invasive measuring instrument, which is used for routine quality control of diagnostic X-ray equipment. We chose to measure the following parameters : X-ray tube voltage, half value layer (HVL), dose and irradiation time. Along with the precision of the mentioned instrument, we assessed X-ray tube voltage dependency based on various factors (X-ray tube current, irradiation time, SDD and added filtration). The instrument used to measure the X-ray tube voltage was the invasive X-ray tube voltage and current meter, and to measure the dose with ionization Chamber was used. The X-ray tube voltage error and the error in its dependence were within ±3%, this indicated high accuracy. The coefficient of determination R^2 was 0.99, indicating a good correlation. Based on the results, This non-invasive measuring instrument demonstrated high measurement accuracy, and therefore it is a reliable meter for routine quality control.

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