Anatomical Information of Slice Thickness Variation in Ischemic Stroke with CT Scan

Abstract

Ischemic stroke causes partial or complete blockage of blood flow to the brain. Signs of ischemic stroke can be observed on CT scans of the head, namely Hyperdense Artery Sign (HAS) and parenchymal hypoattenuation. A CT scan can make the diagnosis by providing the desired anatomical information. The slice thickness of the CT scan examination of the head is 2-5 mm from the base of the cranium to the pars petroleum and 5-10 from the pars petroleum to the vertex, while in RSI Siti Rahmah Padang CT scan of the head in the case of ischemic stroke uses a slice thickness of 5 mm. Slice thickness is one of the significant parameters in providing anatomical information and good image quality. This research was conducted at RSI. Siti Rahamah from February to April 2023. Slice thickness variations start from 2 mm, 3 mm, 4 mm, and 5 mm. Descriptive qualitative research type. The research informants consisted of 5 radiology specialists. Data collection methods consisted of literature study, observation, interviews, and documentation. Data is processed using comparative, namely comparing the results of observations with existing theories in reference books through data reduction, data presentation, and conclusions. The results showed that the periventricular anatomy was visible at each slice thickness. The basal ganglia area is clearer at a 2 mm slice thickness, the sulci cerebrum is better at a 2 mm slice thickness, hippo lesion area is clear at a 2 mm slice thickness. The boundary between white matter and gray matter is clearer at 2 mm slice thickness, the pons and thalamus look the same at each slice thickness, and the head CT scan examination of ischemic stroke cases is better at 2 mm slice thickness.