소아 투시조영검사 시 Pulse rate별 화질분석을 통한 저선량 모드 선택에 관한 연구

Select of Pulse Rate to Reduceing Radiation and Maintain Image Quality in Pediatrics Fluoroscopy Studies

Purpose : To purpose of this thesis is a research about reduction plan of radiation dose without reduction of image quality through understanding of the relationship between Dose Area Product(DAP) of Digital Flat Panel Detector(DAPD) equipment and pulse rate on pediatric fluoroscopy studies. Materials and Methods : From 2009 December to 2010 February, 40 patients under the age of 5 children who visited Asan Medical Center to check on pediatric fluoroscopy studies have been enforced(Voiding Cysto urethrography(VCUG: 20 people and Upper gastrointenstinal CUGI: 20 people). The measuring equipment used DAP meter, DAP was measured from identical patient follows per 1 minutes in pulse rate and compared a reduction. Also doctor enforced a question investigation with the object and analyzed the relationship with image quality. Results : The result were as follows; 1) From DFPD equipment, based on 30f/s of UGI examination when compared with 15f/s, at 61.8% of DAP were measured. Also 7.5f/s at 36.3%, 3.7f/s at 17.7% DAP were measured. In case of VCUG, 15f/s at 62.6%, 7.5f/s at 41.9%, 3.7f/s at 25.4% of DAP were measured. 2) Questionnaire results of radiologist about image quality, 75% of the respondents were allowed to 7.5f/s, 25% were allowed to 3.7f/s. Conclusion :In conclusion, when considering about image quality and DAP reduction followed in changes pulse rate, the use of 7.5f/s is most desirable. Therefore, we should try to reduce pediabic radiation dose through methods such as using 7.5f/s.