ANALYSIS OF ASIR VARIATION EFFECT TO SNR ON UNENHANCED ABDOMINAL CT SCAN IN UROLITHIASIS

Rizki Aditiya Pratama Putra; Paulus Rahardjo; Pramono Pramono

doi:10.20473/jvhs.V4.I2.2020.78-82

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Rizki Aditiya Pratama Putra
rizkiaditiya1@gmail.com
Departement of Health, Faculty of Vocational Studies, Universitas Airlangga, Indonesia
Paulus Rahardjo Department of Radiology, Faculty of Medicine, Universitas Airlangga, Indonesia
Pramono Pramono Radiodiagnostic Division, Dr.Soetomo General Hospital, Surabaya, Indonesia

Vol. 4 No. 2 (2020): November 2020 | JOURNAL OF VOCATIONAL HEALTH STUDIES

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Background: Adaptive Statistical Iterative Reconstruction (ASIR) reconstruction in unenhanced abdominal CT scan reduce the radiation dose from 11.6 mSv to 2.07 mSv. However, the decrease in dose is accompanied by a decrease in image quality. Signal to Noise Ratio (SNR) is one of image quality parameters. Purpose: This study aims to determine the effect of the ASIR method on the optimal Signal to Noise Ratio (SNR) value in unenhanced abdominal CT of urolithiasis in clinical data. Method: 27 samples collected and the SNR was measured on the ASIR reconstruction results at the level of 40%, 50%, 60% by placing the ROI in organ structures with different densities. Result: The results of this study indicate that the ASIR method has a significant effect on the SNR value. Based on the linear regression test, the value was 0.005 ( p< 0.05) and only had an effect of 9.5% on SNR. Conclusion: It can be concluded that the ASIR method affects the optimal SNR value for unenhanced abdominal CT on urolithiasis. The ASIR 60% level was recommended.

Pratama Putra, R. A., Rahardjo, P., & Pramono, P. (2020). ANALYSIS OF ASIR VARIATION EFFECT TO SNR ON UNENHANCED ABDOMINAL CT SCAN IN UROLITHIASIS. Journal of Vocational Health Studies, 4(2), 78–82. https://doi.org/10.20473/jvhs.V4.I2.2020.78-82

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