Measurement of CT Number Uniformity Value at Various X-ray Tube Current Settings in CT Scanning
DOI:
10.29303/jppipa.v11i1.8527Published:
2025-01-31Issue:
Vol. 11 No. 1 (2025): In ProgressKeywords:
CT number, Tube Current, Uniformity Value, Water PhantomResearch Articles
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Abstract
Studies on the analysis of variations in CT number uniformity values for CT-Scan images has been conducted. This study aims to evaluate the image quality value by uses various tube currents (mAs) in Siemens merk water phantom irradiation to assess the value of image quality. A Siemens Somatom Scope CT-Scan with current variations of 180 mAs, 200 mAs, 220 mAs, 240 mAs, and 260 mAs was used. The image results were then anlyzed for quality through the CT number uniformity value test. Using a marker size of 12.56 cm2, the ROI method was applied at five different picture points: the center, 3, 6, 9, and 12 o'clock. For each current variation used in this study, 3 irradiation was carried out and 5 image slices were taken from each irradiation.This resulted of the analysis the CT number uniformity value was shown to be significantly reduced by the tube current strength (R2=0.9896, p-value<0.05), according to the research. The test showed that the uniformity CT number value decreased from 0.217 HU to 0.031 HU as the tube current strength was increased, bringing it closer to the reference value (0 HU). The consistency CT number values acquired in this study remain within the 2 HU tolerance limits established by BAPETEN.
References
A. N. Christensen. (2014). PET/CT Atlas on Quality Control and Image Artefacts. http://www.iaea.org/Publications/index.html
Anam, C., Naufal, A., Budi, W. S., & Sutanto, H. (2023). IndoQCT: A Platform For Automated Ct Image Quality Assessment. Medical Physics International Journal, 2(11), 328–336. https://www.researchgate.net/publication/377440227
Astuti, S. Y., Sutanto, H., Hidayanto, E., Jaya, G. W., Supratman, A. S., & Saraswati, G. P. (2018). Characteristics of Bolus Using Silicone Rubber with Silica Composites for Electron Beam Radiotherapy. Journal of Physics and Its Applications, 1(1), 24. https://doi.org/10.14710/jpa.v1i1.3914
Bahrurridha, F., Hartoyo, P., Desty, ), Tunggadewi, A., & Fisika, J. (2022). Perbandingan Kualitas Citra Pada Sofware ASiR-V dan Non ASiR-V Dengan Menggunakan CT-Scan Ge. Jurnal Pembelajaran Fisika, 11(1), 1–10.
BAPETEN. (2018). Peraturan Badan Pengawas Tenaga Nuklir Nomor 2 Tahun 2018 tentang Uji Kesesuaian Pesawat Sinar-X Radiologi Diagnostik dan Intervensional. https://jdih.bapeten.go.id/id/dokumen/peraturan/peraturan-badan-pengawas-tenaga-nuklir-nomor-2-tahun-2018-tentang-uji-kesesuaian-pesawat-sinar-x-radiologi-diagnostik-dan-intervensional
Bissonnette, J. P., Moseley, D. J., & Jaffray, D. A. (2008). A Quality Assurance Program for Image Quality of Cone-Beam CT Guidance in Radiation Therapy. Medical Physics, 35(5), 1807–1815. https://doi.org/10.1118/1.2900110
Bryant, J. A., Drage, N. A., & Richmond, S. (2012). CT number definition. Radiation Physics and Chemistry, 81(4), 358–361. https://doi.org/10.1016/j.radphyschem.2011.12.026
Contillo, A., Veronese, A., Brombal, L., Donato, S., Rigon, L., Taibi, A., Tromba, G., Longo, R., & Arfelli, F. (2018). A Proposal for a Quality Control Protocol in Breast CT with Synchrotron Radiation. Radiology and Oncology, 52(3), 329–336. https://doi.org/10.2478/raon-2018-0015
Das, I. J., Cheng, C. W., Cao, M., & Johnstone, P. A. S. (2016). Computed tomography imaging parameters for inhomogeneity correction in radiation treatment planning. In Journal of Medical Physics (Vol. 41, Issue 1, pp. 3–11). Wolters Kluwer Medknow Publications. https://doi.org/10.4103/0971-6203.177277
Fitriana, L., Adi, K., & Ardiyanto, J. (2021). Optimization dose and image quality enhancement of ct scan with back projection filters on the use of automatic exposure control. Journal of Physics: Conference Series, 1943(1). https://doi.org/10.1088/1742-6596/1943/1/012048
Gulliksrud, K., Stokke, C., & Trægde Martinsen, A. C. (2014). How to measure CT image quality: Variations in CT-numbers, uniformity and low contrast resolution for a CT quality assurance phantom. Physica Medica, 30(4), 521–526. https://doi.org/10.1016/j.ejmp.2014.01.006
Hermena, S., & Young, M. (2021). CT-scan Image Production Procedures. NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK574548/
IAEA. (2012). Quality Assurance Programme for Computed Tomography: Diagnostic and Therapy Applications. http://www.iaea.org/Publications/index.html
Irsal, M., Mukhtar, A. N., Winarno, G., & Sari, G. (2022). The Effect of Kilovoltage and Milliampere-Second Parameters on CT Number: Study Phantom Quality Control CT Scan. SANITAS: Jurnal Teknologi Dan Seni Kesehatan, 13(2), 237–244. https://doi.org/10.36525/sanitas.2022.20
Irsal, M., & Winarno, G. (2020). Pengaruh Parameter Milliampere-Second (mAs) terhadap Kualitas Citra Dan Dosis Radiasi Pada Pemeriksaan CT scan Kepala Pediatrik. Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat, 17(1), 1. https://doi.org/10.20527/flux.v17i1.7085
Jessning Gamalita Mberato, A., Nyoman Ratini, N., Made Yuliara, I., & Irhas, R. (2023). Analysis of The Effect of The X-Ray Tube Current on Uniformity Image Noise Value. Indonesian Physical Review, 6(1), 11–19. https://doi.org/10.29303/ip
Jung, H. (2021). Basic Physical Principles and Clinical Applications of Computed Tomography. Progress in Medical Physics, 32(1), 1–17. https://doi.org/10.14316/pmp.2021.32.1.1
Mekonin, T. S., & Deressu, T. T. (2023). Image quality and radiation dose assessment for the clinically applied 16-slice CT scanner using PMMA phantom and quality assurance phantom. Egyptian Journal of Radiology and Nuclear Medicine, 54(1). https://doi.org/10.1186/s43055-023-01038-5
Milvita, D., & Prasetio, H. (2019). Analisis Nilai Noise dari Citra Pesawat CT-Scan pada Beberapa Rekonstruksi Kernel dengan Variasi Slice Thickness. Jurnal Fisika Unand, 8(1), 63.
Mustafidah, T., Rulaningtyas, R., & Muzammil, A. (2022). Ct-Scan Image Optimization With Tube Current Variation In Some Kernel Filters Based on Signal to Noise Ratio (SNR) Value. Hell. J. Οf Radiol, 7(4), 2–1.
Park, H. N., Min, C. K., Kim, K. A., & Koh, K. J. (2019). Optimization of exposure parameters and relationship between subjective and technical image quality in cone-beam computed tomography. Imaging Science in Dentistry, 49(2), 139–151. https://doi.org/10.5624/isd.2019.49.2.139
Prabhu, S., Naveen, D. K., Bangera, S., & Subrahmanya Bhat, B. (2020). Production of X-RAYS using X-RAY Tube. Journal of Physics: Conference Series, 1712(1). https://doi.org/10.1088/1742-6596/1712/1/012036
Sari, M. D., Fitriyani, D., & Prasetio, H. (2023). Analisis Sensitivitas Dalam Deteksi Homogenitas ROI Pada Pengukuran Kualitas Citra Pesawat CT-Scan. Jurnal Fisika Unand, 12(1), 158–163. https://doi.org/10.25077/jfu.12.1.158-163.2023
Seeram, E. (2023). X-Ray Imaging Systems for Biomedical Engineering Technology: An Essential Guide. In X-Ray Imaging Systems for Biomedical Engineering Technology: An Essential Guide. Springer International Publishing. https://doi.org/10.1007/978-3-031-46266-5
Setyowati, E. (2015). Pengukuran CT Mean Value, CT Uniformity dan Derau Citra Pada Tomografi Komputer. Majalah Ilmiah, 07(02), 25–31.
Sidi, M., Hussain, U. Y., Yau, A., & Garba, I. (2020). Evaluation of the computed tomography number for water, field uniformity, image noise and contrast resolutions in Kano Metropolis, Nigeria. Nigerian Journal of Basic and Clinical Sciences, 17(1), 21–25. https://doi.org/10.4103/njbcs.njbcs_10_20
Author Biographies
Ni Nyoman Ratini, Udayana University
Gusti Ngurah Sutapa, Udayana University
Ni Kadek Nova Anggarani, Udayana University
I Gde Antha Kasmawan, Udayana University
Anastasia Jessing Gamalita Mberato, Institute Technology Bandung
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Copyright (c) 2025 Ni Nyoman Ratini, Gusti Ngurah Sutapa, Ni Kadek Nova Anggarani, I Gde Antha Kasmawan, Anastasia Jessing Gamalita Mberato

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