Background: Multidetector computed tomography (MDCT) has become a routine imaging modality for numerous clinical applications due to its extensive availability, reduced invasiveness, rapid scanning time, great anatomical resolution, and superior diagnostic value. At the same time, the radiation dose to the patient and the concern surrounding this problem has also increased.Objective: The aim of this study is to assess image quality related to patient radiation dose for multidetector computed tomography in chest and brain CT examinations.Patients and Methods: A total of 60 patients who underwent chest and brain scans from four hospitals on 16, 32, and 64 slice (CT) scanners. Clinical image data were used for image quality calculation and dose assessment.