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http://dx.doi.org/10.5392/JKCA.2019.19.08.284

The Evaluation of Dose Reduction and Quality of Images According to 80 kVp of Scan Mode Change in Pediatric Chest CT  

Kim, Gu (양산부산대학교병원 영상의학과)
Kim, Gyeong-Rip (양산부산대학교병원 감마나이프센터)
Lee, Eun-Sook (부산대학교병원보건의료정보팀)
Cho, Hee-Jung (부산과학기술대학교의무행정과)
Sung, Soon-Ki (양산부산대학교병원 감마나이프센터)
Moon, Seul-ji-a (전남대학교병원 영상의학과)
Kwak, Jong-Hyeok (양산부산대학교병원 영상의학과)
Publication Information
The Journal of the Korea Contents Association / v.19, no.8, 2019 , pp. 284-292 More about this Journal
Abstract
To evaluate the usefulness of pediatric chest CT scans by comparing the dose, examination time, and image quality by applying Helical mode, High-pitch mode, and Volume Axial mode to minimize the radiation exposure and obtain high diagnostic value. Revolution (GE Healthcare, Wisconsin USA) was used to divide PBU-70 phantom into Helical mode, High-pitch mode, and Volume Axial mode. After acquiring images, ROI is set for each image, heart, bone, lung, and back-ground air, and the average value is obtained by measuring CT number (HU) and noise (SD). SNR and CNR were measured and compared with DLP values provided directly by the equipment. Determining statistical significance Statistical analysis was performed using ONE-WAY-ANAOVA using SPSS 21.0. In this experiment, it was possible to inspect at a short time without deterioration of image quality with the lowest dose when using volume axial mode. Although the detector coverage of 16 cm is limited to all pediatric chest CT scans, it is recommended to be actively used in pediatric patients, and further study is needed to apply other test sites in volume axial mode.
Keywords
Volume Axial; SNR; CNR;
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