Analisis Window Width Dan Window Level Pada Window Lung Pemeriksaan CT-Scan Thorax Dengan Kasus TB Paru

Abstract

Background: Pulmonary tuberculosis (TB) remains a significant global health problem, with approximately 85% of TB cases affecting the lungs. In this context, Thoracic CT Scans provide detailed anatomical visualization of the lungs, particularly for assessing pulmonary TB lesions. In relation to which, the quality of CT images is greatly influenced by the settings of Window Width (WW) and Window Level (WL), which determine image contrast and the visibility of anatomical structures and lesions.
Methods: The research employed a quantitative method with a subjective image analysis approach, involving six respondents. The sample consisted of 10 primary data sets and 10 secondary data sets, with variations in Window Width (WW) settings of 1500 and 1600 and Window Level (WL) settings of −400, −500, and −600.
The research was undertaken at Radiology Department of Persahabatan Central General Hospital starting from August up to October 2025 using a 128-slice Siemens CT Scanner. As for the data, they were gathered through among the other things direct observation during thoracic CT examinations, followed by image reconstruction with variations in Window Width and Window Level.
Results: As the results, this research demonstrated that there are significant differences in the image quality among the various WW and WL settings. A Window Width of 1500 and Window Level of -400 produced the highest image quality, providing clearer and more informative visualization of anatomical structures and pulmonary TB lesions. In contrast, a WW of 1600 and WL of -600 yielded the lowest image quality, as the pulmonary tissue appeared darker, reducing the visibility of anatomical details and lesions.
Conclusions: To get the most informative results for pulmonary TB patients using a 128-slice Siemens CT Scanner, clinicians should prioritize a WW 1500 / WL -400 configuration during image reconstruction.