Anam, Choirul, Triadyaksa, Pandji, Naufal, Ariij, Arifin, Zaenal, Muhlisin, Zaenul, Setiawati, Evi, Budi, Wahyu Setia. (1401). Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms. سامانه مدیریت نشریات علمی, 12(4), 359-368. doi: 10.31661/jbpe.v0i0.2202-1457
Choirul Anam; Pandji Triadyaksa; Ariij Naufal; Zaenal Arifin; Zaenul Muhlisin; Evi Setiawati; Wahyu Setia Budi. "Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms". سامانه مدیریت نشریات علمی, 12, 4, 1401, 359-368. doi: 10.31661/jbpe.v0i0.2202-1457
Anam, Choirul, Triadyaksa, Pandji, Naufal, Ariij, Arifin, Zaenal, Muhlisin, Zaenul, Setiawati, Evi, Budi, Wahyu Setia. (1401). 'Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms', سامانه مدیریت نشریات علمی, 12(4), pp. 359-368. doi: 10.31661/jbpe.v0i0.2202-1457
Anam, Choirul, Triadyaksa, Pandji, Naufal, Ariij, Arifin, Zaenal, Muhlisin, Zaenul, Setiawati, Evi, Budi, Wahyu Setia. Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms. سامانه مدیریت نشریات علمی, 1401; 12(4): 359-368. doi: 10.31661/jbpe.v0i0.2202-1457

Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms

Journal of Biomedical Physics and Engineering
مقاله 5، دوره 12، شماره 4، آبان 2022، صفحه 359-368    اصل مقاله (1.65 M)
نوع مقاله: Original Research
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.2202-1457
نویسندگان
Choirul Anam* 1؛ Pandji Triadyaksa1؛ Ariij Naufal2؛ Zaenal Arifin2؛ Zaenul Muhlisin2؛ Evi Setiawati2؛ Wahyu Setia Budi1
1PhD, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
2MSc, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
چکیده
Background: The effect of region of interest (ROI) size variation on producing accurate noise levels is not yet studied. 
Objective: This study aimed to evaluate the influence of ROI sizes on the accuracy of noise measurement in computed tomography (CT) by using images of a computational and American College of Radiology (ACR) phantoms.
Material and Methods: In this experimental study, two phantoms were used, including computational and ACR phantoms. A computational phantom was developed by using Matlab R215a software (Mathworks Inc., Natick, MA Natick, MA) with a homogeneously +100 Hounsfield Unit (HU) value and an added-Gaussian noise with various levels of 5, 10, 25, 50, 75, and 100 HU. The ACR phantom was scanned with a Philips MX-16 slice CT scanner in different slice thicknesses of 1.5, 3, 5, and 7 mm to obtain noise variation. Noise measurement was conducted at the center of the phantom images and four locations close to the edge of the phantom images using different ROI sizes from 3×3 to 41×41 pixels, with an increased size of 2×2 pixels. 
Results: The use of a minimum ROI size of 21×21 pixels shows noise in the range of ±5% ground truth noise. The measured noise increases above the ±5% range if the used ROI is smaller than 21×21 pixels.  
Conclusion: A minimum acceptable ROI size is required to maintain the accuracy of noise measurement with a size of 21×21 pixels.
کلیدواژه‌ها
ACR Phantom؛ Computational Phantom؛ Diagnostic Imaging؛ Image Quality؛ Noise Measurement؛ Radiologic Phantoms؛ Tomography, X-Ray Computed؛ X-Rays
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آمار
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