Chest lateral decubitus is a chest examination to determine the persence of pleural fluid in thorax. In this study, we prepare recumbent holding position time standard of chest lateral decubitus. The records of 15 patients with chest lateral decubitus between May and Jun. Recumbent holding time is 30, 60, 90, 120, 180, 210, 240 seconds. The result is fluid level change between 0.88mm to 9.63. Fluid heigh change between 9.9 percent to 42.5 percent. We can confirm fluid level change with chest decubitus image. The proper time for fluid level change is 180 seconds.

1. 서 론
 2. 대상 및 방법
  2.1 대상
  2.2 방법
 3. 결과
  3.1 시간대별 흉수의 높이 변화
 4. 고찰
 5. 결론
 6. Reference

• 김기진(건양대학교병원 영상의학과) | Ki-Jin Kim
• 정창민(서해대학교 방사선학과) | Chang-Min Jeong Corresponding Author
• 유세종(건양대학교병원 영상의학과) | Se-Jong Yoo
• 최원진(건양대학교병원 영상의학과) | Won-Jin Choi
• 김정호(건양대학교병원 방사선종양학과) | Jeong-Ho Kim