CT urography 검사 시, scout의 재촬영 여부에 따른 image quality 비교 및 선량 감소에 대한 고찰
A study on the difference in the image quality and radiation exposure depending on the number of retakes in the scout phase in the CT urography
The CT urography is a non-invasive, essential examination for patients who have a urinary system disease. Maximizing the opacification and distention of the bladder is important because it facilitates the detection of tumors and provides morphological information on the bladder. This study evaluates the difference in the quality of the bladder filling image and the total dose of radiation exposed to patients when the repositioned patient, after having rolled over, is not rescanned in the scout phase before proceeding to be scanned in the excretory phase. The CT urography protocols are divided into two groups, In Group A, the patient is scanned twice in the scout phase, first in the supine position and then again in the prone position after being repositioned on the CT table. In Group B, the patient is scanned only once in the scout phase in the prone position before being repositioned. In the quantitative evaluation of the two groups, Group B had lower average standard deviation of the CT number in the bladder than Group A (p<0.05). In the qualitative and total dose evaluation of the two groups, Group B had higher value than Group A (p<0.05). This study demonstrates that it is possible to get a homogeneous image of the bladder by not rescanning the patient after being repositioned.
목차
Abstract Ⅰ. 서론 Ⅱ. 대상 및 방법 2.1. 연구 대상 및 사용 장비 2.2. 검사방법 2.3 영상평가 및 선량평가 Ⅲ. 결과 3.1 영상평가 및 선량평가 Ⅳ. 고찰 Ⅴ. 결론 참고문헌