Analisis Variasi Slice Thickness, Arus dan Tegangan Tabung Terhadap Kualitas Citra CT Scan Multislice di Rumah Sakit Islam Yogyakarta PDHI

Abstract

This research focuses on determining good CT scan image quality so that it is useful for diagnosing the patient's condition. Data collection in this study was carried out using a SIEMENS water phantom for the head examination protocol by varying the slice thickness, current, and tube voltage. This study aims to analyze the influence of slice thickness, tube current, and voltage on CT scan image quality. The variations in slice thickness used are 2, 4, 6, and 8 mm. The tube current variations used were 60, 80, and 120 mAs, while the voltage variations used were 80, 110, and 130 kV. The CT scan image quality analysis process is carried out using the Signal to Noise Ratio (SNR) and Volume Computed Tomography Dose Index (CTDIvol) methods. The result of this research is that the greater the slice thickness, the current and voltage used will increase the SNR value. Additionally, increasing tube current and voltage will increase the amount of radiation (CTDIvol) at the detector and patient. Increasing the SNR and CTDIvol values ​​will reduce the value of artifacts and noise in the image, this will result in better CT scan image quality and the contrast between organs will be clearly visible. From the research results it can be concluded that the SNR and CTDIvol values ​​are each in the good category and are safe to use for patient examinations.