Computed tomography (CT) scans use contrast medium to help diagnose diseases of vascular and lesions in human organ tissues. The use of tube voltages higher than 120 kV during CT scans improves the transmission of radiation, which increases the diagnostic quality of medical images. However, the use of high tube voltages results in over radiation exposures. In addition, the use of contrast medium may be toxic to the kidneys, which may cause side effects. Therefore, this study attempted to acquire images by changing tube voltage and tube current according to the concentration of contrast medium. also, the aim of this study is to find a way to reduce the exposure dose through image quality evaluation of acquired images. In conclusion, the radiation dose reduction of about 3mGy (about 32%) could be expected by using condition 100kV and 200mAs during abdominal aortic CT scan by contrast medium.
목차
Abstract Ⅰ. 서론 Ⅱ. 대상 및 방법 1. 실험 기기 및 재료 2. 실험 방법 Ⅲ. 결과 1. 피폭선량 2. 조영제 SNR 3. 조영제 CNR Ⅳ. 고찰 Ⅴ. 결론 참고문헌
키워드
contrast medium densitykVpmAradiation exposure doseimage quality