en Radiation Biology Radiation Biology گزارش کوتاه Short Report <div style="text-align: justify;"><span style="font-size:10pt"><span style="text-justify:newspaper"><span style="text-kashida-space:50%"><span style="line-height:119%"><span style="font-family:Calibri"><span style="color:black"><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Background:</span></span></span></span></span></span> <span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">The Computed Tomography is a major contributor to patient radiation exposure in diagnostic radiology. This study aimed to establish facility-specific CT Diagnostic Reference Levels for head, chest and abdomen examinations to optimize radiation doses while maintaining diagnostic image quality. The diagnostic reference levels serve as benchmarks to enhance radiation protection by adjusting scanning parameters. The establishment of facility diagnostic reference levels provide a base line for future dose reduction strategies. </span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-GB">Materials and Methods: </span></span></span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">Adult patient data for head, chest, and abdomen scans were collected from the facility&rsquo;s 128-slice CT scanner. The facility volumetric computed dose index and dose-length product data was recorded on Microsoft excel sheet. The first, second and third quartile values were determined, and the facility diagnostic reference levels were established as the third quartile of the median volume CT dose index and dose-length product values for head, chest and abdomen examination. </span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-GB">Results: </span></span></span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">The determined median volumetric computed dose index for head, chest and abdomen was 41.9 mGy (IQR: 41.9-46.35 mGy), 29.5 mGy (IQR: 28.3-29.5 mGy) and 29.5 mGy (IQR: 29.5-42.98 mGy) respectively. The corresponding median dose-length product values were 810mGy&middot;cm (IQR: 768.5-931.6 mGy&middot;cm) for head, 1220 mGy&middot;cm (IQR: 1031.45-1312.9 mGy&middot;cm) for chest, and 1694.5 mGy&middot;cm (IQR: 1529.68&ndash;2247 mGy&middot;cm) for abdomen. </span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-GB">Conclusion: </span></span></span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">The study findings support the development of local and national benchmarking databases for CT radiation doses.&nbsp;&nbsp; The evaluated F facility diagnostic reference levels provide a base line for future dose reduction strategies used for standardization and radiation doses optimization in CT imaging.</span></span></span></span></span></span></span></span></span></span></div> Optimization, computed tomography, dose reference levels, volumetric computed dose index, dose length product. 289 292 http://ijrr.com/browse.php?a_code=A-10-1-1489&slc_lang=en&sid=1 A. Saeed Shah shahsaeed2002@yahoo.com 7900319475328460033035 7900319475328460033035 No Department of Radiology, Rehman Medical Institute, Hayatabad Peshawar, Pakistan Gh. Ghaus Shah 7900319475328460033036 7900319475328460033036 No Department of Radiology, Rehman Medical Institute, Hayatabad Peshawar, Pakistan U. Siddique Umer 7900319475328460033037 7900319475328460033037 No Department of Radiology, Rehman Medical Institute, Hayatabad Peshawar, Pakistan H. Abid 7900319475328460033038 7900319475328460033038 No Department of Radiology, Rehman Medical Institute, Hayatabad Peshawar, Pakistan