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Ni Wayan Mega Savira Utami
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Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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Pengaruh Kombinasi Arus Tabung Sinar-X dan Waktu Eksposi Terhadap Contrast to Noise Ratio (CNR) dengan menggunakan Computed Radiography Ni Wayan Mega Savira Utami; Ratini Ni Nyoman; Juliantara I Putu Eka
BULETIN FISIKA Vol 23 No 1 (2022): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2022.v23.i01.p04

Abstract

A research has been carried out to determine the effect of the combination of X-ray tube current and exposure time on the Contrast to Noise Ratio (CNR) using Computed Radiography (CR). This study aims to determine the combination of X-ray tube current and exposure time on the quality of X-ray images using CR and the optimal value of its CNR. The tool used is a step wedge with an additional 1.5 mm thickness at each step, a constant tube voltage of 56 kV, an X-ray tube current and an exposure time of 5 mAs. Variations in the value of 5 mAs into the X-ray tube current and exposure time are as follows, variation 1 of 100 mA and 0.050 s, variation 2 of 125 mA and 0.040 s, variation 3 of 160 mA and 0.032 s, variation 4 of 200 mA and 0.025 s, and variation 5 of 250 mA and 0.020 s. Reading the values ??of Is, Ib, and ?b using the RadiAnt DICOM VIEWER 2020.1 software program (64 bit) and analyzing the effect of the combination of X-ray tube current and exposure time on CNR values ??using IBM SPSS Statistic 26 with One Way-ANOVA Test. The results of the analysis showed that the combination of X-ray tube current and exposure time had no effect on the CNR value. The optimal value of CNR is 42.37, obtained in variation 3, namely the X-ray tube current is 160 mA and the exposure time is 0.032 s.
Co-Authors I Putu Eka Juliantara Ni Nyoman, Ratini