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http://dx.doi.org/10.5392/JKCA.2019.19.12.517

Evaluation of Image Quality and Stability of Radiation Output according to Change in Tube Voltage and Sensitivity when Abdomen and Pelvis Examination of Digital Radiography (DR)  

Hwang, Jun-Ho (경희대학교병원 영상의학과)
Yang, Hyung-Jin (고려대학교 의용과학대학원 의학물리학과)
Choi, Ji-An (경희대학교병원 영상의학과)
Lee, Kyung-Bae (경희대학교병원 영상의학과)
Publication Information
The Journal of the Korea Contents Association / v.19, no.12, 2019 , pp. 517-526 More about this Journal
Abstract
The purpose of this study is to find the optimal method for clinical application by analyzing image quality and radiation output according to parameter combination when using the Automatic Exposure Control (AEC). The experimental method combines 70, 81 kVp with sensitivity S200, S400, S800 and S1000 of the Automatic Exposure Control for Entrance Surface Dose (ESD), current volume, Signal to Noise Ratio (SNR), Contrast to Noise Ratio (CNR), Time-to-Radiation Dose Curve in abdomen and pelvis. And then, image quality and radiation output stability were evaluated. As a results, Entrance Surface Dose, current volume, Signal to Noise Ratio, Contrast to Noise Ratio decreased as the tube voltage and sensitivity were set higher. In addition, the higher tube voltage and sensitivity, the Time-to-Radiation Dose Curve showed a poor output stability. In conclusion, the higher the combination of tube voltage and sensitivity in the use of Automatic Exposure Control, the more problems can be seen in image quality and stability of the radiation output. Therefore, a relatively low combination of tube voltage and sensitivity showed that the image quality and radiation output stability could be optimized by minimizing the error range that would occur when the detector recognized a combination of parameters.
Keywords
Digital Radiography (DR); Tube Voltage; Sensitivity; Image Quality; Radiation Output;
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Times Cited By KSCI : 1  (Citation Analysis)
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