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KMID : 1151820170110010055
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Journal of the Korean Society of Radiology
2017 Volume.11 No. 1 p.55 ~ p.61
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A Study on the Optimization of Image Quality and Dose in Chest PA Digital Radiography
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Park Han-Sol
Kim Myeong-Seong
Jung Hong-Moon
Lee Jong-Woong
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Abstract
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There are no recommended test conditions for digital photography in Chest PA examinations. However, each company recommends shooting examinations of the high voltage applied to the previous analog examination. The condition that satisfies the value of 200 ~ 800 which is the recommended Exposure Index value recommended by Philips was selected, and the dose was evaluated by Monte Carlo simulation, and the SNR and CNR were compared. As a result, it was possible to reduce the effective dose up to 77% by controlling the tube voltage, tube current, and additional filter, not the conventional high voltage imaging method. Although there were some differences according to the test conditions, the image evaluation results were similar to the images. We will compare the exposure dose according to changes in tube voltage, tube current, and additional filter at the digital chest radiograph and evaluate the image quality of the image to propose optimal conditions.
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KEYWORD
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Exposure Index, Effective dose, Signal to Noise Ratio(SNR), Contrast to Noise Ratio(CNR), Monte Carlo technique
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