Assessment of radiation doses to adult patients in computed tomography procedures

The purpose of this study was to assess radiation dose and estimate the effective dose in three different detectors of CT scanners (64 slices, 16 slices and dual slice) for routine CT investigation. A total of 60 patients were examined in this study. 20 patients for dual slice (10 patient for chest and 10 for abdomen, 20 patient for sixteen slices (10 for chest and 10 for abdomen ) and 20 for sixty four slices (10 for chest and 10 for abdomen). The mean dose values for CT chest for sixteen slices were DLP 152.4±56,76 mGy.cm, CTDIvo1 4.53±1.47 mGy ED 2.13±0.974 mSv, while for dual slice the mean values were DLP is 167±55,51 mGy.cm. CTDIvo1 5.02±1.41 mGy ED 2.3±0.77 mSv, while the mean dose values for sixty four slice were DLP 567±43.63 mGy.cm,CTDIvo1 15.08±0.252 ED 7.9±0.61 mSv and for CT abdomen the mean dose values for sixteen slices were DLP 306.6±43.63 mGy.cm, CTDIvo1 6.45±3.31 mGy ED 4.59±1.83 mSv, while for dual slice the mean dose values were DLP 208±78.46 mGy.cm, CTDIvo1 27±1.46 mGy ED 3.12±1.18 mSv, while for sixty four slices the mean dose values were DLP 694.6±28.44 mGy.cm, CTDIvol 121.56±0.250 mGy ED 10.42±0.43 mSv dual slice delivered the least radiation dose while 16 and 64 slice scanners delivered the highest radiation dose. CT dose optimization protocol is not implemented in all departments. (author)