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All Journal JOURNAL OF HEALTH SCIENCE (JURNAL ILMU KESEHATAN) Pillar of Physics: Jurnal Berkala Ilmiah Fisika Healthy Tadulako Journal (Jurnal Kesehatan Tadulako) Majority Science Journal Lontara Journal Of Health Science And Technology
Dewilza, Nerifa
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Humanities Chemistry Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health

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Journal : Lontara Journal Of Health Science And Technology

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Perbandingan Variasi Window Level Terhadap Spatial Resolution dan Contrast Resolution CT Scan Thorax dengan Kasus Tumor Paru Dewilza, Nerifa; Yudha, Sagita; Sari, Oktavia Puspita; Febriyani, Putri Wirya
Lontara Journal of Health Science and Technology Vol. 6 No. 2 (2025): Juli-Desember 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Politeknik Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53861/lontarariset.v6i2.587

Abstract

CT Scan is an imaging modality that combines X-rays using the principles of Tomography with a computer as the data processor. Lung Window settings for CT Scan Thorax examination use Window level -500 HU. In the Radiology Installation of Dr. M. Djamil Padang Hospital, CT Scan Thorax examination uses Window level - 600 HU. This study aims to determine which Window level value is better from the variation of Window level values on the lung window - 400 HU, - 500 HU, and - 600 HU on the quality of CT Scan Thorax images with Lung Tumor cases on the Lung Window axial section. The type of research used in this study is quantitative research that is experimental. This research was conducted in the Radiology Installation of Dr. M. Djamil Padang Hospital. The population of this study were patients with CT Scan Thorax examinations with clinical Lung Tumors. The sample in this study amounted to 5 patients with a purposive sampling technique. Then the image results are varied using Window Level value variations - 400 HU, - 500 HU, and - 600 HU and then compared to see which Window Level variation produces optimal image quality. The best value that can display optimal image quality is the window level value of -600 HU because it can show the lung hilus and show pathology in detail and can display a better level of brightness in the image.
Analisis Variasi Faktor Eksposi Terhadap Contrast To Noise Ratio (CNR) Citra Cranium Proyeksi Antero Posterior Wahdini Hanifah; Dewilza, Nerifa; Nisa, Chairun; Yudha, Sagita; Kirana, Keisya Salsabila
Lontara Journal of Health Science and Technology Vol. 7 No. 1 (2026): Januari-Juni 2026
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Politeknik Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53861/lontarariset.v7i1.590

Abstract

The quality of radiographic images is highly dependent on exposure factors including tube voltage (kV), tube current and exposure time (mAs). The Contrast to Noise Ratio value can transmit image quality, a higher CNR indicates a good image with less interference (noise). The study aims to determine the effect of exposure factor variations on the CNR value and which exposure factors that produce optimal CNR in AP cranium projections. This study uses a quantitative method, an experimental study at the Radiology Installation of the Siti Rahmah Padang Islamic Hospital in September 2024. Data were obtained from cranium phantom images with variations in tube voltage (kV) 68, 74, and 78, and current and exposure time (mAs) 10, 12, and 14. The images were analyzed using the Radiant DICOM Viewer application with the ROI technique to calculate the CNR value in the anatomical area, namely the frontal, crista gali, mandible, both orbits and the background. The ROI results were analyzed using multiple linear regression tests. The results showed that the variation of exposure factors had a significant effect on the CNR value of 94.7%. The optimal exposure factor, at 68 kV and 14 mAs, with the highest CNR of 44.598. The lowest CNR value at an exposure factor of 78 kV and 10 mAs was 22.063. These results can be used as a reference in determining the optimal exposure factor in AP cranium examination
Co-Authors Alfaridzi, Muhammad Chairun Nisa Chairunnisa Chairunnisa Cicilia Artitin Febriyani, Putri Wirya Hanifah, Wahdini Kirana, Keisya Salsabila Mareta, Santa Nansih, Livia Ade Rahmadianti, Yori Ramadanti, Tasya Sagita Yudha Sari, Oktavia Puspita Vania, V Wahdini Hanifah