FAJAR MUSLIM ANALYSIS OF RADIATION DOSE ON HEAD CT SCAN USING SEQUENTIAL AND HELICAL SCAN METHODS IN THE RADIOLOGY INSTALLATION OF FATMAWATI HOSPITAL xi V CHAPTERS + 36 pages + 18 images + 4 tables + 10 attachments This study aimed to analyze the radiation dose of head CT Scan using sequential and helical scan methods in the Radiology Installation of Fatmawati Hospital. The design of thi…