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Background: CT Scan is a medical technology that can show images in the form of slices to see the anatomy of the human body because this technology combines X-rays and television. Basically, how a CT scan works uses a radiation source from X-rays. There are various examinations that can be carried out using a CT scan, one of which is a head examination with a CT scan. CT scan of the head at the Radiology Installation at Bhayangkara Hospital Makassar uses a Slice Thickness of 3 mm to produce a better image. The aim of this research is to determine the Head CT Scan Examination Procedure for Clinical Hemorrhagic Stroke in the Radiology Installation of Bhayangkara Hospital, Makassar. Results: The results of this study indicate that the CT scan procedure of the head with clinical hemorrhagic stroke at the radiology installation at Bhayangkara Hospital, Makassar was carried out without any special preparation but the patient was instructed to remove metal objects or accessories around the head such as earrings, hairpins and necklaces. Using a slice thickness of 3 mm is good enough to display image results and confirm the diagnosis. Conclusion: The head CT scan procedure for clinical hemorrhagic stroke was carried out using the head first protocol. The slice thickness used in this examination is 3 mm. The choice of slice thickness is the biggest factor because a thick slice thickness will produce images with low detail and cause artifacts, whereas a thin size will produce images with high detail but there is noise in the image.

Hemorrhagic stroke is the rupture of blood vessels in the brain, resulting in reduced blood flow (ischemia) and hypoxia. One of the disorders that can be diagnosed through sophisticated modalities is a CT scan, because it can be done quickly and accurately when evaluating bleeding in the brain. The slice thickness used in CT scans of the head in hemorrhagic stroke cases is 5 mm-10 mm, carried out using a one range protocol, namely from the basic cranii to the vertex. Slice thickness is the thickness of the slice that can be selected according to clinical needs. The factors used to evaluate image quality are spatial resolution, resolution contrast and noise. This research is quantitative by taking an experimental approach to analyze the effect of using slice thickness variations of 3mm, 4mm and 5mm on image quality (spatial resolution, resolution contrast and noise) on CT scans of the head in cases of hemorrhagic stroke of 10 samples. Based on the results of the research carried out, the researchers can conclude according to the overall results of the Friedman test that there is an influence on the image quality of CT scans of the head in hemorrhagic stroke cases using slice thickness variations of 3mm, 4mm and 5mm on spatial resolution, contrast resolution and noise. So based on the results of the Friedman test per image quality, there is a difference in the image quality of CT scans of the head and cases of hemorrhagic stroke which use slice thickness variations of 3mm, 4mm and 5mm. Based on the results of the mean rank of the Friedman test, slice thickness 5mm has a mean rank of 2.88 with the highest value. Based on the results of this study, researchers can recommend that CT scans of the head in cases of hemorrhagic stroke use a slice thickness of 5 mm with the aim that the image quality results in CT scans of the head in cases of hemorrhagic stroke look clear and good.