TY - JOUR AU - Shah, Pooja PY - 2020/12/21 Y2 - 2024/03/29 TI - Estimation of effective dose from CT scanning using dose length product in a Nepalese hospital JF - Radiography Open JA - RadOpen VL - 6 IS - 1 SE - Articles DO - 10.7577/radopen.3565 UR - https://journals.oslomet.no/index.php/radopen/article/view/3565 SP - 56-63 AB - <p><strong>Keywords:</strong> Effective dose, Dose Length Product, Computed Tomography Dose Index<br />volume, Dose Reference Level</p><p><br /><strong>Abstract</strong><br /><strong>Aim</strong>: The aim of this study was to estimate the effective doses from CT scans using Dose<br />Length Product (DLP) in a Nepalese hospital.<br /><strong>Materials and methods</strong>: This prospective study was conducted in 150 patients above 18<br />years of age who were referred for CT scan of head, chest and abdomen. The CT scan was<br />performed on a 128 slice multi detector scanner. All the subjects who met the inclusion<br />criteria were included in the study. Following the non-contrast imaging phases of the head,<br />chest and abdomen CTDIvol, DLP, kVp and pitch were recorded for each patient from the<br />console display of the scanner. The effective dose was calculated for each examination using<br />DLP which were graphically analyzed and correlated with the age of the patient.<br /><strong>Results</strong>: The study showed the mean CTDIvol for head, chest and abdomen to be 53.95±4.83<br />mGy, 5.28±1.17 mGy and 11.15±2.71 mGy respectively along with mean DLP to be<br />923.52±71.11 mGycm, 229.32±48.70 mGycm and 517.02±148.32 mGycm respectively. Using<br />these values, the mean effective doses were calculated and found to be 1.93±0.14 mSv,<br />3.20±0.68 mSv and 7.75±2.19 mSv respectively.<br /><strong>Conclusion</strong>: The calculated effective dose values were lower than in other studies for CT<br />examinations of chest and abdomen while higher or similar for CT examination of head. The<br />results of this survey could motivate other researchers to investigate the radiation doses in<br />other hospitals and help establish national diagnostic reference levels.</p><p> </p> ER -