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http://dx.doi.org/10.7742/jksr.2019.13.5.749

Effects of Tube Voltage and Tube Current on Exposure Index : Focused on Radiographic Images of Cone Pyramid Phantom  

Seoung, You-Hun (Department of Radiological Science, College of Health Medical Science, Cheongju University)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.5, 2019 , pp. 749-755 More about this Journal
Abstract
In this study, we investigated the effects of tube voltage (kVp) and tube current (mAs) on an exposure index (EI) applied to a digital radiography. There used an inverter type digital X-ray generator and an image receptor (IR) utilized a portable wireless detector without a grid. Radiographic images were acquired using a cone pyramid phantom produced using a 3D printer. The X-ray tube voltage was increased from 40 kVp to 120 kVp with 10 kVp increment, and the tube current was increased from 1 mAs to 128 mAs with the twice increment. As a result, kVp had logarithmic relationship with the EI as high $R^2$ value, and mAs had a very high linear relationship too. Also, there was a high correlation between the area dose and the EI of the IR, with the $R^2$ value being 0.76 or more. In conclusion, it had showed that mAs affected the EI linearly, and that it could be advantageous to adjust the easy-to-predict mAs to maintain proper image qualities.
Keywords
Cone pyramid phantom; Digital radiography; Tube voltage; Tube current; Exposure index;
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Times Cited By KSCI : 2  (Citation Analysis)
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