| Περίληψη: | Brain CT Perfusion (CTP) is an X-ray imaging modality for the assessment of cerebrovascular disorders. The aim of this study is the evaluation of the radiation dose to patients during a comprehensive brain CT prescription protocol (CPP) consisting of an unenhanced brain CT, a brain CT Angiography and a CTP scan.
Materials and Methods. - Fifteen patients were studied using an 80-slice CT system, with an iterative reconstruction algorithm. The volume Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP) were recorded from the dose report of the system. The calculation of Effective Dose (ED) was accomplished using the DLP values.
Results. - For the CTP examinations, the CTDIvol ranged from 116.0 to 134.8 mGy, with the mean value 119.8 mGy. The DLP ranged from 463.9 to 539.2 mGy∙cm, with the mean value 478.9 mGy∙cm. For the CPP, the total ED ranged from 3.31 to 4.88 mSv, with the mean value 4.34 mSv.
The radiation dose to the patients from the 80-slice CT system of our study is lower not only than that of 64-slice CT systems but also lower than that of 128,192,256 and 320-slice CT systems, reported in corresponding studies.
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