Development of X-ray PIV System Using a Medical X-ray Tube

임상용 X-선관을 이용한 X-ray PIV시스템의 개발

  • 임대현 (포항공과대학교 기계공학과 대학원) ;
  • 김국배 (포항공과대학교 기계공학과 대학원) ;
  • 김도일 (가톨릭대학교 의공학교실 대학원) ;
  • 이형구 (가톨릭대학교 의공학교실) ;
  • 이상준 (포항공과대학교 기계공학과)
  • Published : 2006.08.23

Abstract

A new medical X-ray PIV technique was developed using a conventional medical X-ray tube. To acquire images of micro-scale particles, the X-ray PIV system consists of an x-ray CCD camera with high spatial resolution, and a X-ray tube with small a focal spot. A new X-ray exposure control device was developed using a rotating disc shutter to make double pulses which are essential for PIV application. Synchronization methodology was also developed to apply the PIV technique to a conventional medical X-ray tube. In order to check the performance and usefulness of the developed X-ray PIV technique, it was applied to a glycerin flow in an opaque silicon tube. Tungsten particles which have high X-ray absorption coefficient were used as tracer particles. Through this preliminary test, the spatial resolution was found to be higher than ultrafast MRI techniques, and the temporal resolution was higher than conventional X-ray PIV techniques. By improving its performance further and developing more suitable tracers, this medical X-ray PIV technique will have strong potential in the fields of medical imaging or nondestructive inspection as well as diagnosis of practical thermo-fluid flows.